close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3053253

код для вставки
sePt- 11, 1962
H. DOMANN
3,053,243
‘IMPULSE CONTROLLED SPEED-RESPONSIVE RELAY
Filed Oct. 28. 1960
&
2 Sheets-Sheet 1
~IT— P$-+
I
L10’ F/G‘. 4
l
|
I
I
I
l
I
l
I
Sept. 11, 1962
H. DOMANN
3,053,243
IMPULSE commons]: SPEED-RESPONSIVE RELAY
Filed Oct. 28. 1960
2 Sheets-Sheet 2
Fig.5
55
141T“
770
Hkc36
@150
E .
114
735 Mi: Fig. 7
P200"
£138 I!
143
161
-
"Y
INVENTOR
A
’
United States Patent 0
cr'
1C6
3,053,243
Patented Sept. 11, 1962
2
1
thereof with the collector of said transistor means, where
by said coil means will be energized depending upon the
3,053,243
MPULSE CUNTRQLLED SPEED
RESPONSIVE RELAY
pulse frequency vfurnished by the pulse generator means
corresponding to the speed of the engine.
Helmut Domann, Stuttgart, Germany, assignor to
Robert Bosch G.m.h.H., Stuttgart, Germany
The novel features which are considered as characteris
tic for the invention are set forth in particular in the ap
pended claims. The invention itself, however, both as to
Filed Oct. 28, 1960, Ser. No. 65,797
Claims priority, application Germany Get. 17, 1959
14 Claims. (Cl. 123-179)
its construction and its method of operation, together with
additional objects and advantages thereof, will be best
10 understood from the following description of speci?c em
The present invention concerns an impulse controlled
bodiments when read in connection with the accompany
speed-responsive relay, preferably with delay characteris
ing drawings, in which:
tics and especially suited for being used in a motor vehicle
for blocking the starter system under certain conditions.
This is a continuation-in-part of my copending applica
the invention showing the circuitry and the engine and
pertaining elements;
tion, Serial No. 63,014 ?led October 17, 1960, entitled
“Impulse Controlled Speed-Responsive Relay,” now aban
relay energizing currents and rotary speed of the engine;
cloned.
in order to be able to control electrical or mechanical
FIG. 3 is another diagram illustrating the form of an
energizing current in relation to time;
operations of certain apparatus in motor vehicles depend
ing upon the varying rotary speeds thereof it is necessary
FIG. 4 illustrates a modi?cation of the embodiment of
FIG. 1 by illustrating a second form of one portion of the
to provide relay devices which are actuated to change
from their idle condition to their operative condition
‘whenever the engine reaches a predetermined rotary
circuitry illustrated in FIG. 1;
FIG. 1 is a schematic diagram of one embodiment of
FIG. 2 is a diagram illustrating the relation between
FIG. 5 is a schematic diagram of a further modi?cation
of the embodiment of FIG. 1 including pulse-operated
speed. In a similar manner a relay may be desirable 25 delay means;
FIG. 6 is a diagram showing a modi?cation of a portion
which is caused to change between its idle and operating
of the circuitry of FIG. 5; and
conditions whenever the engine speed drops below a pre
FIG. 7 is a diagram illustrating a modi?cation of
determined minimum. It has been found that the accuracy
FIG. 6.
and sensitivity of such relays is increased if the energizing
The relay arrangement according to FIG. 1 is designed
currents introduced into the relay follow precisely the 30
for being used in a motor vehicle which has a four-cylin
variation of the rotary speed of the engine in linear rela
der four-stroke engine It}. The engine is equipped with
tionship.
an electric starter motor 11 and with a braking throttle 14
It is further desirable to provide for a relay arrangement
located within the exhaust channel .12 which throttle may
Which would prevent damage to the starter gears when
after an unsuccessful attempt to start the engine the 35 be utilized, e.g. during long downhill rides for assisting or
starter motor should be energized again before the engine
and the ?ywheel carrying one of the starter gears have
returned to standstill.
It is therefore a main object of the invention to provide
for a relay arrangement of the type set forth in which the 40
energizing currents for the relay follow linearly the fre
quency of control pulses applied thereto and depending
upon the rotary speed of the engine.
It is another object of the invention to provide for a
relay arrangement of the type set forth in which a delay
of the relay action is obtained upon de-energization of the
starter motor..
it is a further object of this invention to provide for an
arrangement as stated above which is highly sensitive and
‘accurate and reliable in operation.
With the above objects in view an impulse controlled
speed-responsive relay arrangement for motor vehicles
having an engine operable at varying rotary speeds com
prises, according to the invention, in combination, pulse
generator means operatively connected with the engine for
furnishing pulse sequences of varying frequencies corre
sponding to the varying rotary speeds of the engine; tran
‘
relieving the standard brake system of the vehicle by turn—
ing the throttle 14 from the illustrated open position to
ward or into its closing position with the aid of an elec
tromagnetic actuator described below.
‘
The actual relay arrangement according to the invention
is shown within the dotted frame 20. This type of relay
arrangement has the double purpose of automatically turn
ing the braking throttle 14 to its open position whenever
the rotary speed of the engine drops below a predeter
mined minimum value. Se'cond, the arrangement is de
signed to prevent the starter motor ‘11 from being put into
operation as long as the crank shaft (not shown) of the
engine is in rotation or at least is rotating at a speed above
a very low predetermined maximum. The entire arrange
ment 2% is controlled by current pulses which are fur~
nished, e.g., by the conventional high voltage ignition
system cooperating with the engine 10. The ignition
system comprises an ignition coil 21 having a primary
Winding 22, an iron core 23 and a secondary winding 24,
further a distributor 25 and an interrupter switch 28
operated periodically by a ‘four-cam member 27, the latter
and the rotary arm of the distributor 25 being driven
directly or indirectly by the crank shaft of the engine.
sistor means having an emitter-base circuit connected be
The ignition system further comprises an ignition con~
tween the terminals of a source of direct current voltage,
with a resistor connected in said circuit between the base 60 denser 29 as ‘shown. The outer ends of the primary wind
ing 22 and the secondary winding 24, respectively, of the
of said transistor means and one of said terminals, and
ignition coil 21 are connected with each other and their
having a collector-base circuit containing recti?er means,
junction point across the primary winding 35 of a trans—
condenser means being connected in parallel with said
former, described below, with the positive terminal of a
recti?er means across said collector-base circuit; circuit
means connected between said pulse generator means and 65 storage battery 36. This battery serves as source of direct
current energy both for the ignition system and the other
said collector-base circuit for application of said pulse
devices shown in FIG. 1 including the starter motor 11.
sequences thereto; and relay means including coil means
The above mentioned transformer 30 is part of the
and cooperating contact means movable between idle and
operative positions depending upon energization of said
relay arrangement 20.
The primary winding- 35 is
coil means and adapted to control accordingly an operat 70 mounted on an iron core 138 and the secondary winding
37 is connected at one end with the base B of a p-n-p
ing circuit that may be connected in circuit with said con
transistor 40 Whose emitter electrode is connected via a
tact means, said coil means being connected at one end
5 3,243
It.
positive line 42 with the positive terminal of the battery
36. The other end of the secondary winding 37 is con
nected with the output terminal of a semi-conductor rec
ti?er 43 whose input electrode is connected with the col
lector electrode C of the transistor 40. Thus the second
ary winding 37 is connected in the collector-base circuit
of this transistor. The base of the transistor 40 is also
connected via a resistor 45 inserted between junction
point 40’ and terminal 46, with ground, i.e. with the
negative terminal of the battery 36.
A ?rst relay coil 47 cooperating with a normally open
other at increasingly smaller intervals as the rotary speed
of the engine increases, this sequence of pulses will set up
in the condenser 46 a potential which increases linearly
with the increasing rotary speed of the engine, and there
fore the increasing rotary speed of the engine will cause
the arithmetic mean value 3m of the above mentioned
energizing current J1 to decrease linearly as shown in the
diagram of FIG. 2.
movable contact 63 is connected at one of its ends also
In the diagram of FIG. 2 in which current values are
indicated as ordinates and rotary speed as abscissae, the
line 76 indicates that current value 1,, which would not
suffice any more to energize the relay coil 47 su?iciently
with ground via terminal 46 while the other end of the
coil 47 is connected with the collector C of the transistor
the contact 65. The intersection of line 76 with the cur
40 via junction point 40". However, the collector-base
circuit of the transistor contains furthermore a chargeable
condenser 48 connected in parallel with this circuit be
tween the junction points 40’ and 40". As can be seen
the relay coils 47 and 49 are actually connected in series
with each other between the terminals of the battery 36,
the junction point between the coils 47 and 49 being con
nected to the collector C of the transistor 40.
The ?rst mentioned movable contact arm 63 and the
other movable contact arm 50 are both connected with
the positive line 42. The relay 47, 63 serves to control
the circuit of the starter motor 11 while the relay 49, 50
serves to control the circuit of the brake throttle mech
anism mentioned above. For this purpose the contact
arm 63 is arranged to engage, upon energization of the
for holding the movable contact 63 in engagement with
rent line Jm corresponds to the rotary speed n1 which is
still below the idling speed no of the engine. This means
that upon an increase of the engine speed beyond n1 the
contact 63 will open and interrupt the starter circuit. The
line 72 in FIG. 2 indicates the current value Je required
to energize the relay coil 47 sufficiently for moving the
arm 63 into engagement with contact 65.
The value IE
is reached by the current J1 ?owing through the transis
tor 46 when the engine speed drops to a speed n2 below
the idling speed no and at which speed the engine could
not continue to operate by itself and therefore would
come to a standstill.
The capacity of the condenser 48
being of the order of about 100 pi. and the relay coil 47
located in the discharge circuit of the condenser having
a certain resistance to which is added the resistance of the
coil 47, a stationary contact 65 connected with a termi 30 resistor 45, the potential at the condenser 48 is bound to
follow the decrease of rotary speed of the engine with a
nal 66 and from there via line 62 and starter switch 60
time delay of more than one second.
with the starter motor 11. The contact arm 50' is ar
The second relay with coil 49' behaves in a manner
ranged to engage, upon energization of the coil 49, a sta
tionary contact 52 connected with terminal 53 and from
there via a switch 54 with an electromagnet 55 adapted
to move the brake throttle 14 into closed position when
energized, and to permit the throttle 14 to return, under
the action of means not shown, to its open position when
just opposite to the behavior of the above described relay
which is to block the operation of the starter at engine
speeds above a certain absolute maximum. The response
of the relay coil 49 to varying conditions is due to the
fact that it is connected in parallel with the emitter~col_
lector circuit of the transistor 40. This emitter-collector
ing of the starter switch 60 would not close a circuit for 40 circuit constitutes during standstill of the engine a very
low resistance in parallel with the relay coil 49 so that
operating the starter motor 11 unless the coil 47 is ener
during standstill of the engine practically no current can
gized and contacts 63 and 65 are moved into engage
?ow through the coil 49. Only when the potential at
ment. As Will be shown, this can only take place when
the condenser 48 is raised by a rapid sequence of charg
the engine is not rotating at all or only extremely slowly.
ing pulses induced in the secondary winding 37 whereby
A relay switch 61 may be interposed between the starter
the transistor 40 is rendered non-conductive to an in
switch ‘60 and ground for indirectly controlling the starter
creasing degree, an increasing energizing current J2 is ca
motor 11.
pable of ?owing through the relay coil 49. The mean
For the purpose of explaining the operation of the ar
value of this current is indicated in FIG. 2 by the dotted
rangement, it should be considered that the ohmic re
line 75 in dependence upon varying rotary speeds. The
sistance of the relay coil 49 is substantially equal to that
current value IE su?icing to cause movement of the con
of the relay coil 47. As long as the engine is at stand
tact arm 50 into engagement with contact 52 is so chosen
still, the transistor 40 is capable of carrying a strong cur
that the current J2 can reach such value only when the
rent J1 across the coil 47 because its base electrode B is
rotary speed increases to the value 113 which value is above
connected via resistor 45 with ground, i.e. with the nega
the idling speed no of the engine. However, when the
tive terminal of the battery 36. Consequently the coil
rotary speed of the engine drops to a speed no the relay
47 is energized under this condition so that the movable
coil 49 will be de-energized so as to permit the arm 50 to
contact 63 is forced into engagement with the stationary
return to idle position. The speed n4 is below the above
contact 65. Thus the starter motor 11 can be actuated
mentioned speed no but su?iciently above the idling speed
by the closing of the starter switch 60. Now the crank
no of the engine.
shaft of the engine will be rotated at a starting speed of
On one hand, it is advantageous for the operation of
no, r.p.m. so that the engine 10 can start its own oper
the starter controlling relay 47, 63 if the speed n1 caus
ation. The cam member 27 mounted on the cam shaft
ing interruption of the starter circuit is a substantial
26 and thus rotating at half the rotary speed of the crank
amount above the speed n2 which would cause again
shaft will cause the interrupter contact 28 to move four
closing of the contact arrangement 63, 65, on the other
times per revolution of the cam shaft 26 to open posi
hand it is desirable that the other relay controlling the
tion. Every time the interrupter contact 28 opens the
position of the brake throttle 14 causes closing of the
circuit, the current ?owing across the primary winding 22
throttle 14 at a speed which is as little as possible above
of the ignition coil 21 is interrupted and consequently a
the idling speed no of the engine, but carries out this
voltage pulse is induced simultaneously with said inter
function when the speed of the engine increases above
ruptions so that the condenser 48 is charged with every
the idling speed. Moreover, the last mentioned relay is
pulse by an equal amount of energy. As the charge of
intended to interrupt the circuit of the throttle control
the condenser 48 increases the current J1 ?owing through
55 again, when the vehicle is slowed by application of
the emitter-collector circuit of the transistor 40 and
the regular brake, at a speed which is only a small amount
through the relay coil 47 decreases. Since the consecu
tive charging pulses of constant amplitude follow each 75 above the idling speed no. This sensitivity can be ob
relay coil 49 is de-energized. On the other hand, clos
3,053,243
6
5
the condenser 91. This has the same effect as the charg
ing of the condenser 48 in FIG. 1 since the condenser
91 is also connected in parallel across the base-collector
circuit of the transistor 92.
A further difference between the arrangements of FIG.
1 and FIG. 4 resides in the fact that the emitter E on
the transistor 92 is connected with the base of a further
the ?uctuation or waviness of the current I2. As can be
p-n-p transistor 93 intended to act as an ampli?er. Both
seen the highest and lowest values of the current I2 are
transistors 92 and 93 have their collectors connected in
distributed symmetrically with the line 78 which repre
sents the mean value of the current. This mean value 10 parallel with each other with a junction point between
the relay coil 90 and a resistor 95, the resulting series
of the current I2 should be available at a speed 115 which
combination of coil 90 and 95 being connected between
is slightly above the idling speed 110. FIG. 3 contains
the terminals of the battery 85 via the grounded terminal
further a ‘line '79‘ representing the above mentioned cur
97. In the same manner as in FIG. 1, the base B of the
rent value IE and a line 80 representing the lower cur
tained by utilizing the waviness of the current 12 which
flows through the relay coil 49. For this purpose the
relay 49, 50 is so dimensioned that the difference be
tween the current values IA and IE is only slightly larger
than the amplitude of the waviness of the current J2.
In FIG. 3 the zig-zag line 77 illustrates diagrammatically
rent value IA. The energizing current J2 of the relay
transistor 92 is connected with the grounded terminal
97 via a resistor 96.
coil 49 ?uctuates between the above mentioned two
Due to the provision of two secondary windings 86
values, but at the above mentioned speed 125 the value
and 87 in the manner shown in FIG. 4 the entire arrange
IE is not reached thereby and the current J2 never falls
ment obtains greater sensitivity and accuracy of oper
short of the value IA. As soon as, however, the engine
is accelerated beyond the speed in, the current curve 77 20 ation which is still enhanced by the cascade connection
of the transistors 92 and 93 resulting in a substantial
is shifted in upward direction in the diagram. of FIG. 3
current ampli?cation.
so that it assumes the position 77’ shown in dotted lines
The modi?cation of the relay arrangement according
and thus intersects with the line 79. The areas of in
to FIG. 4 is particularly useful for blocking the starter
tersection are emphasized in the diagram and the corre
sponding current pulses are suf?cient to energize the coil 25 circuit in those cases where the starter current is so great
that the output voltage of the battery drops considerably
49 and to move the contact 5%} into engagement position.
On the other hand, if the speed slightly decreases, the
current line 7'7 will be shifted in downward direction
to the position shown by a dotted line '77” in which
case this current line intersects with the line 86 result
ing in the emphasized intersection areas whereby the
effective current enters the range below the value JA
and consequently the relay contact 59 is permitted to
return to its idle position.
In this manner it can be
arranged that in spite of a comparatively great difference
between the current values IE and IA already from small
speed increases above or decreases below the speed :15
during the operation of the starter motor. While in the
arrangement of ‘FIG. 1 the contacts 63, 65 cooperating
with the coil 47 are directly connected in the starter
circuit and while there the coil 47 is connected in series
with the emitter-collector circuit of the transistor 49,
the arrangement according to FIG. 4 does not entail the
danger that upon actuation of the starter switch 60 the
drop of the battery voltage due to the high starter cur
rent would cause the relay 47, 63 to be tie-energized
and moved to open position so as to interrupt the starter
circuit with the consequence that only after the battery
voltage is restored to its normal value the relay switch
63, .65 would be closed again. This possibility can be
main therein. Practically speaking, the just mentioned 40 safely avoided by connecting the rest contacts of the
relay carries out the switching operation at a uniform
relay containing the coil 90 in the control circuit of the
predetermined speed 115 with great precision and irre
starter control relay 61 and in parallel with the impulse
spective of whether this speed as has been reached dur
controlled transistor or transistors.
ing acceleration or during slowing down of the engine.
‘It has been found that sometimes difficulties develop
in practical operation of relays of the general type de
Therefore it is possible to select for the critical speed 115
a speed value which is very closely above the idling
scribed above, particularly of a relay which controls the
the relay 49, St} is caused to respond so as to move the
contact 50 in one or the other of its positions and to re
operation of the starter motor. It may occur that the op
erator ?rst starts the engine by operating the starter button
FIG. 4 illustrates a modi?cation of the arrangement
surrounded by the frame 20 in FIG. 1. Within the frame
or switch, but releases the button or switch before the
26' of FIG. 4 a modi?ed relay arrangement is shown 50 engine itself had an opportunity of starting, and then the
operator may operate the starter button or switch before
which is particularly suitable for controlling the starter
the crank shaft of the engine and the ?ywheel which car
circuit. The portions of FIG. 1 outside the frame 29
ries one of the starter gears have returned to standstill.
have been omitted in FIG. 4 but should be assumed to
In such cases it is easily possible that at least one of the
be arranged analogously for cooperation with the spe
gears suffers damage which would entail costly repairs.
cific arrangement of FIG. 4.
In order to prevent such damages the above arrange
In FIG. 4 only a battery 85 is shown which corre
ments may be modi?ed advantageously as Will be described
sponds to the battery 36 in FIG. 1, and an interrupter
herebelow. The effect of these modi?cations is that the
contact 81 which corresponds to the interrupter contact
relay which controls the starter operation returns to its
28 of FIG. 1. A protective resistor 82 is connected be
tween the interrupter contact 81 and the one end of the 60 circuit-blocking condition also when the starter motor is
disconnected or de-energized at a rotary speed of the
primary winding 83 of a transformer 84. The primary
engine which is so low that in the above described arrange
winding ‘83 is accordingly connected between the ter
ments the just-mentioned relay would be in its circuit clos
minals of the battery 85. The secondary portion of the
speed no.
ing condition in view of the respective very low rotary
transformer ‘84 comprises two separate secondary Wind
ings 86 and 87 connected in series with each other, the 65 speed of the engine.
The desired effect is obtained according to the inven
junction point between the windings being connected to
tion by providing for a delay of the relay action during its
one side of a condenser 91. The other side of the con
tendency to return to its normal circuit-closing condi
denser 91 is connected via recti?ers 33 and 89‘, respec
tion, the delay being derived from the inductive voltage
tively, with the outer ends of the secondary windings 86
and 87, respectively. At the same time the other side 70 peaks developing in the starter circuit upon the discon
nection of the starter and said voltage peaks being ap—
of the condenser 91 is connected with the collector C of
plied to the condenser in the described relay circuit so
a ?rst transistor 92. Whenever the interrupter 81 closes
as to increase the charge potential thereof existing at the
or opens the primary circuit, charging potential is induced
moment of disconnecting the starter.
in the secondary windings 86 and 87, respectively, and
the resulting voltage pulses are applied in both cases to
The above-mentioned starter circuit usually contains
3,053,213
8
in turn, controlled by the relay arrangement according to
114 the starter relay 113 is energized so that the opera
tive circuit of the starter motor 111 is closed, then the
the invention. Advantageously one end of the coil of the
starter motor 111 will be able to rotate the crank shaft
just-mentioned starter relay is connected, according to the
of the engine 111) at a speed su?icient for causing starting
of the engine operation. As soon as the engine starts
operating by itself the above described pulse generator
a starter relay which controls the starter motor and is,
invention, via a resistor and a recti?er with one of the
two plates or sides of the above-mentioned condenser.
A particularly effective arrangement is obtained if the
transformer which transmits the controlling impulses
derived from the rotation of the engine to the transistor
means, due to the rotation of the cam member 116 and
the resulting periodical interruptions of the circuit through
the primary winding 122 by periodical movements of the
circuit of the relay arrangement is provided with a sec 10 switch arm 117 into open positions, a rapid sequence of
current pulses is produced and applied to the transformer
ond primary winding which is connected via a recti?er
123 whereby the voltage pulses induced in the second
and another resistor with that end of the winding of the
ary winding 125 are caused to charge the condenser 136
starter relay which is not connected to ground.
Several modi?cations of the general relay arrangement
and providing for the above-mentioned desirable effect
are illustrated by FIGS. 5-7.
As can be seen from FIG. 5 a four-cylinder diesel
engine is provided with a starter motor 111 which may be
to a comparatively high charge potential whereby the
previously conductive transistor 1313 is changed to non
conductive condition in which its emitter-collector circuit
constitutes a high resistance and therefore practically in
effective shunt or parallel circuit for the relay coil 135.
142 and the negative 144 which extends via terminal 143,
relay contacts 140 and 141 and the starter button 114
to ground and thus to the negative terminal of the bat
tery 112. The power supply lines connecting the battery
Under these conditions the relay coil 135 is fully energized
by the battery voltage via the resistor 138 as described
above and is therefore capable of moving the associated
switch relay contact arm 140 from its normal closed posi
tion, as shown, into open position in which the circuit
for the starter relay 114 is interrupted.
It is evident from the preceding description of the
embodiments according to FIGS. 1 and 4, that when
112 with the motor 111 and controlled by suitable con
the engine 110 slows down or comes to a standstill and
coupled with the crank shaft of the engine by gears 148,
149.
The starter motor 111 is controlled by a starter
relay 113 having a coil, not shown in FIG. 5, which is
connected with the storage battery 112 by the positive line
the charging of the condenser 136 is discontinued, the
tacts in the starter relay 113 are not shown because they
transistor 130 would return to conductive condition in
are not necessary for understanding the invention.
Since a diesel engine operates without an ignition 30 which case its emitter-collector circuit constitutes a very
system, the pulse generator means in the present ex
effective bypass or shunt circuit for the coil 135 so that
ample comprise an interrupter switch arrangement includ
the latter becomes de~energized and the relay contacts
14-0, 1411 return to their normal closed position.
ing a four-lobe cam member 116 mounted for rotation
on the crank shaft of the engine 110 and cooperating
with a movable switch arm 117. In closed position the
contact arm 117 closes a circuit from the negative ter
minal of the battery 112 via ground, through a limiting
resistor 119, through the primary winding 122 of a trans
former 123, the winding 122 being connected between ter
minals 120 and 121, and from terminal 121 back to the
positive terminal of the battery 112. The transformer 123
As mentioned above it is possible that the starter button
114 is released by the operator before the engine 110 has
started its own operation.
In this case it must be pre
vented that an immediately following renewed operation
of the starter button 114 would cause energization of the
starter relay 113 and thereby a movement of the gear
148 of the starter motor 111 into mesh with the still ro
tating gear 149 mounted on the ?ywheel of the engine 110.
This is prevented by the effect of the above described
series connection of a resistor 145 and recti?er 146 be
One end of this winding is connected with the base elec
tween the terminal 143 and the junction point 131)’ and
trode B of the transistor 130 the emitter electrode E of
with the ‘base electrode B of the transistor 130. When the
which is connected to a positive line 131 ending also at the
terminal 121 and therefore being connected to the posi 45 operating circuit for the relay 113 is interrupted, a strong
inductive voltage pulse appears ‘at the terminals of the
tive terminal of the battery 112. The other end. of the
not illustrated coil of the starter relay 113 which coil
‘secondary winding 125 is connected via a recti?er 132 with
has a high inductivity. This voltage pulse is applied via
the collector electrode C of the transistor 130, said col
resistor 145, recti?er 146 and junction points 130' and
lector electrode being also connected with one end of the
136’ to the condenser 1136 which thereby obtains a very
relay coil 135 which operates the above-mentioned relay
strong charge. Hereby the transistor 131] is changed to
contact 140. The other end of the relay coil 135 is con
non-conductive condition whereby, for the reasons stated
nected to the positive line 131 and is, therefore, located
above, the relay coil 135 is energized and the contact 140
in the collector-emitter circuit of the transistor 130. As
is removed to open position.
can be seen the secondary winding 125 forms part of the
Only after the just-mentioned condenser charge which
collector-base circuit of the transistor 130. However, a
was produced by the voltage pulse has been dissipated
condenser 136 is connected in parallel across the collec
across the resistor 147 connected with the grounded ter
tor-base circuit between the junction points 136' and 136".
minal 137 to such an extent that the transistor 130 again
The condenser 136 has preferably a capacity of 100 ,uf.
Additionally, between the junction point 136’ and a
becomes strongly conductive, then the relay coil 135 is
grounded terminal 137 is connected a resistor 138 which 60 again de-energized permitting the contact 140 to return to
its normal closed position so that hereafter the starter
is so dimensioned that when the transistor 130 is in non
relay 113 and thereby the starter itself can be energized
conductive or almost non-conductive condition a current
by operation of the starter button 114. It is of great ad
can ?ow over the relay coil 135 which is suf?cient for
moving the relay switch contact 140>from its normally
vantage that in this arrangement the resisors 138 and 147
closed position to open position.
located in the discharge circuit of the condenser 136 in
Up to this point the relay arrangement surrounded
crease the discharge time of the condenser to about l to 3
by a dotted frame line 201} is similar to the corresponding
seconds. This delay time which determines the period of
time that has to elapse before the starter 111 can be oper
arrangement in FIG. 1. However, as can be seen from
FIG. 5, the base electrode B of the transistor 130 is con
ated again, may be adjusted without difficulty by choosing
nected via junction point 130', a recti?er 146 and a 70 accordingly the magnitude of the resistor 147.
resistor 145 with the terminal 143 in the starter circuit.
Now the modification according to FIG. 6 will be de
The recti?er 146 is so polarized that current can pass
scribed. While in the example of FIG. 5 a transistor of
therethrough only in direction from the terminal 143 to the
the p-n-p type can be used because the relay contacts 140
base electrode B of the transistor 130‘.
and 141 are located in that circuit portion which during
In operation, when after closing the push button switch
energization of the starter relay 113 is connected with
carries on its iron core 124 a secondary winding 125.
3,053,243
10
ground, the transistor 166 in the arrangement according
to FIG. 6 must be of the n-p-n type because in this case
the relay contacts 140 and 111 are located in that portion
of the circuit which is connected with the positive terminal
of the battery 112. As far as the component elements
generator means operatively connected with the engine
for furnishing pulse sequences of varying frequencies cor
responding to the varying rotary speeds of the engine;
equivalent with those used in the arrangement according
transistor means having an emitter-base circuit connected
between the terminals of a source of direct current volt
age, with a resistor connected in said circuit between
the base of said transistor means and one of said ter
to FIG. 5, the respective component elements are marked
minals, and having a collector-base circuit containing
of the arrangement according to FIG. 6 are identical or
with the same reference numerals. The magnet coil of
recti?er means, condenser means being connected in par
the starter relay is marked in FIG. 6 with the numeral 161. 10 allel with said recti?er means across said collector-base
One end of this coil 161 is connected to electrical ground,
circuit; circuit means comprising transformer means hav
while the other end thereof is connected to the movable
ing primary winding means in circuit with said pulse
contact arm 140 of the relay 135. In the same manner
as described in reference to FIG. 5, the terminal 143 at
which the above described inductive voltage pulse ap
generator means, and secondary winding means arranged
in said collector-base circuit ‘for application of said pulse
sequences thereto; and relay means including coil means
pears upon release of the starter button 114, is connected
via a resistor 14.5 and a recti?er 146 and junction point
13d’ with the base electrode B of the n-p-n-transistor 160,
however in this case the recti?er 146 is polarized in a
operative positions depending upon energization of said
comparatively expensive n-p-n transistor a less expensive
but nevertheless very effective and powerful p-n-p transis
varying rotary speeds, comprising, in combination, pulse
tor 170 can be used. In order to enable the inductive volt
for furnishing pulse sequences of varying frequencies
corresponding to the varying rotary speeds of the engine;
and cooperating contact means movable between idle and
coil means and adapted to control accordingly an operat
ing circuit that may be connected in circuit with said
direction opposite to that employed in the arrangement 20 contact means, said coil means being connected in par
according to FIG. 5.
allel with the emitter-collector circuit of said transistor
The further modi?cation according to FIG. 7 differs
means between the other terminal of said source and
from the arrangement according to FIG. 5 by having the
a junction point between the collector of said transistor
advantage that the magnet coil 161 of the starter relay can
means and said parallel connected recti?er and condenser
be connected directly with ground and that the relay con 25 means, whereby said coil means will be energized de
tacts 14th and 141 together with the starter button 114
pending upon the pulse frequency vfurnished by the pulse
are inserted in the positive line 131 leading to the positive
generator means corresponding to the speed of the en
terminal of the battery 112. In addition the arrangement
gine.
according to FIG. 7 entails the further advantage over
2. Impulse controlled speed-responsive relay arrange
the arrangement according to ‘FIG. 6 that instead of a 30 ment for motor vehiclm having an engine operable at
generator means operatively connected with the engine
age peaks generated at the terminal 143 upon release of
the starter button 114, as described above, to increase the 35 transistor means having an emitter-base circuit connected
charge potential at the condenser 136, the impulse trans
former 171 is provided not only with a primary winding
17?. corresponding to the winding 122 in ‘FIG. 5, and
between the terminals of a source of direct current volt
age, with a resistor connected in said circuit between
the base of said transistor means and one of said termi~
with a secondary winding 175 corresponding to the wind
nals, and having a collector-base circuit containing recti~
ing 125 in FIG. 5, but also with -a third winding 176 one
?er means, condenser means being ‘connected in parallel
end of which is directly connected with electrical ground.
with said recti?er means across said collector-base cir
The other end of this winding is connected with the ter
cuit; circuit means comprising transformer means having
minal 143 via a recti?er 177 and a resistor 178 and, there
primary winding means in circuit with said pulse genera
fore, is supplied with a strong current pulse upon release
tor means, and two secondary winding means arranged
of the starter button 114. This current pulse produces 45 in said collectorebase circuit for application of said pulse
in the secondary winding 175 a high voltage which serves
sequences thereto, one end of each of said secondary
to increase the present charge of the condenser 136 by
windings being connected with the base of said transis
which the transistor 170 is changed to non-conductive
tor means and with one side of said condenser means,
condition so that during a delay period ranging between
each of the other ends of said secondary windings being
1 and 5 seconds the relay contacts 140 and 141 can move
connected via recti?ers, respectively, with the other side
into open position.
=of said condenser means and with the collector of said
It will be understood that each of the elements described
transistor means; and relay means including coil means
above, or two or more together, may also ?nd a useful
and cooperating contact means movable between idle
application in other types of impulse controlled relay
arrangement differing from the types described above.
While the invention has been illustrated and described
as embodied in impulse controlled speed-responsive relay
arrangement for motor vehicles, it is not intended to be
limited to the details shown, since various modi?cations
and structural changes may be made without departing in
any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully re
veal the gist of the present invention that others can by
and operative positions depending upon energization of
55 said coil means and adapted to control accordingly an
operating circuit that may be connected in circuit with
said contact means, said coil means being connected at
one end thereof with the collector of said transistor
means, whereby said coil means will be energized depend
ing upon the pulse ‘frequency ‘furnished by the pulse gen
erator means corresponding to the speed of the engine.
3. An arrangement as claimed in claim 2, wherein said
coil means is connected in parallel with the emitter
applying current knowledge readily adapt it for various
collector circuit of said transistor means between the other
applications without omitting features that, from the 65 terminal of said source and a junction point ‘between the
standpoint of prior art, fairly constitute essential char
collector of said transistor means and said parallel con
acteristics of the generic or speci?c aspects of this inven
nected recti?er and condenser means.
tion and, therefore, such adaptations should and are in
4. An arrangement as claimed in claim 2, including
tended to be comprehended within the meaning and range
second transistor means having its base electrode con
of equivalence of the following claims.
70 nected with the emitter electrode of said ?rst mentioned
What is claimed as new and desired to be secured by
transistor means, and having its emitter electrode con
Letters Patent is:
nected with said other ‘terminal of said source, while its
l. Impulse controlled speed-responsive relay arrange
collector is connected in parallel with the collector of
ment for motor vehicles having an engine operable at
said ?rst mentioned transistor means to said one end
varying rotary speeds, comprising, in combination, pulse: 75 of said coil means.
2,053,243
ll.
5. Impulse controlled speed-responsive relay arrange
12
terminals, and having a collector-base circuit containing
recti?er means, condenser means being connected in
parallel with said recti?er means across said collector-base
circuit; circuit means connected between said pulse gen
generator means operatively connected with the engine
for furnishing pulse sequences of varying frequencies CH erator means and said collector-base circuit for applica
tion of said pulse sequences thereto; starter relay means
corresponding to the varying rotary speeds of the engine;
including a relay coil for controlling the supply of energy
transistor means having an emitter-base circuit connected
to the starter motor; and guard relay means including coil
between the terminals of a source of direct current volt
means and cooperating contact means movable between
age, with a resistor connected in said circuit between the
ment for motor vehicles having an engine operable at
varying rotary speeds, comprising, in combination, pulse
base of said transistor means and one of said terminals, 10 idle and operative positions depending upon energization
of said coil means and being connected in circuit with said
and having ‘a collector-base circuit containing recti?er
means, condenser means being connected in parallel with
said recti?er means across said collector-base circuit;
circuit means connected between said pulse generator
means and said collectorabase circuit for application of
said pulse sequences thereto; and relay means including
two coil means and two respectively cooperating contact
means movable between idle and operative positions de~
pending upon energization of said coil means and adapted
to control accordingly two separate operating circuits,
respectively, that may be connected in circuit with said
contact means, said two coil means being connected in
series with each other between the terminals of said source,
the junction point between said two coil means being con
nected with the collector of said transistor means, where
by said coil means will be energized depending upon the
pulse frequency furnished by the pulse generator means
corresponding to the speed of the engine.
‘6. Impulse controlled speed-responsive relay arrange
relay coil of said starter relay means for controlling the
latter, said coil means being connected at one end thereof
with the collector of said transistor means, whereby said
guard relay means will be energized depending upon the
pulse frequency furnished by said pulse generator means
coresponding to the speed of the engine for preventing
operation of the starter motor under unfavorable condi
tions.
8. Impulse controlled speed-responsive relay arrange
ment for motor vehicles having an engine operable at
varying rotary speeds and a starter motor, comprising, in
combination, pulse generator means operatively connected
with the engine for furnishing pulse sequences of varying
frequencies corresponding to the varying speeds of the
engine; transistor means having an emitter-base circuit
connected between the terminals of a source of direct
current voltage, with a resistor being connected in said
circuit between the base of said transistor means and one
ment for motor vehicles having an engine operable at 30 of said terminals, and having a collector-base circuit con
taining recti?er means, condenser means being connected
generator means operatively connected with the engine
in parallel with said recti?er means across said collector
for furnishing pulse sequences of varying frequencies
base circuit; circuit means connected between said pulse
corresponding to the varying rotary speeds of the en
generator means and said collector-base circuit for ‘appli
gine; transistor means having an emitter-base circuit con
cation of said pulse sequences thereto; staner relay means
nected between the terminals of a source of direct current
for controlling the supply of energy to the starter motor,
voltage, with a resistor connected in said circuit between
said starter relay means having a relay coil of high induc
the base of said transistor means and one of said termi
tivity; second circuit means operatively connecting at least
nals, and having a collector-base circuit containing recti
one terminal of said relay coil with said condenser means
tier means, condenser means being connected in parallel
of said collector-base circuit for applying to said con
with said recti?er means across said collector base circuit;
denser means voltage pulses inductively produced in said
circuit means connected between said pulse generator
relay coil at the moment of its de-energization and for
means and said collector-‘base circuit for application of
thereby increasing the charge of said condenser means at
varying rotary speeds, comprising, in combination, pulse
said pulse sequences thereto; and relay means including
such moment; and guard relay means including coil means
coil means and cooperating contact means movable be
and cooperating contact means movable between idle and
tween idle and operative positions depending upon ener
operative positions depending upon energization of said
gization of said coil means and adapted to control ac
cordingly an operating circuit that may be connected in
circuit with said contact means, said coil means being
connected at one end thereof with the collector of said
transistor means, whereby said coil means will be ener
coil means and being connected in circuit with said relay
coil of said starter relay means for controlling the latter,
gized depending upon the pulse frequency furnished by
the pulse generator means corresponding to the speed of
the engine, the parameters of said various means being
so chosen that the difference between the current required
for suf?ciently energizing said coil means for moving
said contact means from idle position to operative posi
tion, and the smaller current value at which said contact
means are released to return to idle position is substan
said coil means being connected at one end thereof with
the collector of said transistor means, whereby said guard
relay means will be energized depending upon the pulse
frequency ‘furnished by said pulse generator means cor
responding to the speed of the engine for preventing op
eration of the starter motor under unfavorable conditions.
9. An arrangement as claimed in claim 8, wherein said
second circuit means comprise a series-combination of
resistor means and recti?er means.
10. An arrangement as claimed in claim 9, wherein one
end of said series-combination is connected to one termi
tially equal to the amplitude of the wave form of the
60 nal of said relay coil, While the other terminal thereof
energizing current derived from said pulse sequence and
is connected to electrical ground.
applied to said coil means, whereby the critical differen
11. An arrangement as claimed in claim 9, wherein said
tial between engine speeds causing the change between
said positions of said contact means is reduced to a mini
mum.
7. Impulse controlled speed-responsive relay arrange
ment for motor vehicles having an engine operable at vary
transistor means is of the p-n-p type, and wherein a
starter switch is provided for connecting one terminal of
65 said relay coil via said guard relay contact means with
electrical ground and thereby to the negative terminal of
said source, said series-combination being connected be
ing rotary speeds and a starter motor, comprising, in
combination, pulse generator means operatively connected
with the engine for furnishing pulse sequence of varying
frequencies corresponding to the varying speeds of the
tween said one terminal of said relay coil and the base
engine; transistor means having an emitter-base circuit
said source.
of said transistor means as well as to one side of said
condenser means, while the other terminal of said relay
coil is directly connected with the positive terminal of
12. An arrangement as claimed in claim ‘9, wherein said
transistor means is of the n-p-n type, and wherein a
rent voltage, with a resistor being connected in said circuit
between the base of said transistor means and one of said 75 starter switch is provided for connecting a ?rst terminal
connected between the terminals of a source of direct cur
3,053,243
13
of said relay coil via said guard relay contact means with
the positive terminal of said source, said series-combina
tion being connected between said ?rst terminal of said
relay coil and one side of said condenser means, while the
second terminal of said relay coil is directly connected to
electrical ground and thereby to the negative terminal of
said source.
13. Impulse controlled speed-responsive relay arrange
14
said second primary winding and at least one terminal
of said relay coil for applying through said secondary
Winding to said condenser means voltage pulses induc
tively produced in said relay coil at the moment of its
de-energization and for thereby increasing the charge of
said condenser means at such moment; and guard relay
means including coil means and cooperating contact
means movable between idle and operative positions de
ment for motor vehicles having an engine operable at
pending upon energization of said coil means and being
varying rotary speeds and a starter motor, comprising, in 10 connected in circuit with said relay coil of said starter
combination, pulse generator means operatively connected
relay means for controlling the latter, said coil means
with the engine for furnishing pulse sequences of varying
being connected at one end thereof with the collector
frequencies corresponding to the varying speeds of the
of said transistor means, whereby said guard relay means
engine; transistor means having an emitter-base circuit
rent voltage, with a resistor being connected in said cir
will be energized depending upon the pulse frequency
furnished by said pulse generator means corresponding
to the speed of the engine for preventing operation of the
cuit between the base of said transistor means and one of
said terminals, and having a collector-base circuit con
starter motor under unfavorable conditions.
14-. An arrangement as claimed in claim 13, wherein a
connected vbetween the terminals of a source of direct cur—
taining recti?er means, condenser means being connected
starter switch is provided for connecting said one terminal
in parallel with said recti?er means ‘across said collector 20 of said relay coil v-ia said ‘guard relay contact means with
base circuit; circuit means connected between said pulse
the positive terminal of said source, while the other ter
generator means and said collector-base circuit for ap
minal of said relay coil is directly connected to electrical
plication of said pulse sequences thereto, said circuit
ground and thereby to the negative terminal of said source,
said recti?er means being connected at the input side there
a second primary Winding and a secondary winding, said 25 of ‘with one end of said second primary winding.
?rst primary winding being connected in circuit with said
pulse generator means, said secondary winding being con
References Cited in the ?le of this patent
nected in said collector-base circuit; starter relay means
UNITED STATES PATENTS
for controlling the supply of energy to the starter motor,
said starter relay means having a relay coil of high induc
Wintsch ______________ __ Sept. 9, 1941
2,255,092
tivity; second circuit means including a series-combination
Harman et al. ________ __ June 14, 1960
2,941,120
means comprising transformer means having a ?rst and
of resistor means and recti?er means connected between
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 407 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа