close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2131403

код для вставки
Sept. 27, 1938.
L__K_ LOEHR ET AL
2,131,403
AUTOMATIC STARTING MECHANISM
Filed Jan. 26, 1932
.
wag/aw ,BY
@607” w_
.
'
INVENTOR
L eslie z. ?m‘uuw 6. 43mm
ATTORNEY
Patented-Sept. 27, 1938
2,131,403
UNITED STATES PATENT OFFICE
2,131,403
AUTOMATIC STARTING MECHANISM
Leslie K. Loehr and Wayne E. Burdick, Los An
geles, Calif., assignors to The Startomatic Cor
poration, Los Angeles, Calif., a corporation of
Nevada
Application January 26, 1932, Serial No. 589,027
4 Claims.
This invention relates to automatic starting
mechanism for internal combustion engines and
more particularly to a device for automatically
starting an engine on closure of a manual switch
such as the ignition switch of the engine, and
restarting the same in case of engine stall, as
long as said-manual switch is left closed.
Automatic starting devices have heretofore
been constructed for use in conjunction with the
ll) conventional starting motor and automatic pinion
shift, which devices embodied magnetically oper
a lead 3 to a series coil 4 of a control relay indi
cated generally by numeral 5.
Relay coil 4 is
connected by a lead 6 to a magnetic starting
switch indicated generally at l, which switch is
connected by a lead 8 to a starting motor SM
which is grounded at 9 to complete the starting
circuit. It will be understood that the starting
motor is intended to crank the engine by means of
a conventional form of automatic drive which it
is believed to be unnecessary to illustrate.
10
A control circuit for the magnetic starting
ated starting switches which were closed when
a manual switch such as the ignition switch of the
engine was closed, and which were opened by
various means responsive to rotation of the en
gine. In connection with the opening means,
switch ‘I is illustrated comprising a manual switch
I I which may, as indicated, be the ignition switch
of the engine and which is connected by a lead
difficulty has been encountered in perfecting a
device which will open the starting circuit when
the engine becomes self-operative but which will
not open the starting circuit during the cranking
when energied causes closure of the starting
switch 1. The control circuit is completed from
solenoid I4 by a lead I5 which is arranged to be
grounded by either of two sets of contacts [6 and
I1, contacts l6 being arranged to be operated by
the relay 5 and contacts I‘! being arranged to be
operated by another relay indicated generally at
operation.
Since it is very undesirable to have
the cranking operation interrupted prior to self
operation of the engine, it is essential for a satis
factory device that this differentiation between
[D an cranking and idling conditions of the engine be
reliably maintained.
It is an object of the present invention to pro
vide an automatic starting mechanism which is
reliable and e?icient in operation and which per
s)
(Cl. 290-37)
forms its controlling function unfailingly.
It is another object to provide such a device
which employs two separate controlling devices,
one for causing the control circuit to be opened
when the engine starts, and the other for holding
said circuit open as long as the engine is in oper
ation.
A further object of the invention is to provide
such a device which is arranged to delay re~
closure of the starting circuit while the starting
motor is spinning by momentum from the previ
ous actuation thereof.
Further objects and advantages will be appar
ent to those skilled in this art from the following
description taken in connection with the accom
5 panying drawing in which:
!2 to the battery lead 3. The ignition switch I I 15
is connected by a lead i3 to a solenoid M which
l8. The sets of contacts 16 and I1 are arranged
in parallel as illustrated whereby closure of either 25
set of contacts completes the control circuit
through grounds 21 or 2'6, provided the manual
switch II is closed, causing closure of the mag
netic switch ‘I and consequent energization of the
starting motor.
Contacts I‘! are normally maintained closed as
by means of a light spring 19, and means are pro
vided for opening said contacts in response to
rotation of the engine. As here illustrated, this
function is performed by the relay “3 which has ,
a coil 21, one end of which is grounded as in
dicated at 22 and the opposite end of which is
connected by a lead 23 direct to a generator G
driven by the engine to be started. The opposite
terminal of the generator is grounded at 24 to 40
complete its circuit, and the coil 2| is so designed
that rotation of the engine at- its lowest idling
speed, which may be lower than normal cranking
speed, will maintain contacts I‘! open.
Contacts iii are normally open, and means are .
Fig. l is a semi-diagrammatic illustration of an
electrical system for an internal combustion en
provided for closing said contacts responsive to
energization of the starting system. _As here il
gine embodying one preferred form of the inven
lustrated, these contacts are arranged to be closed
by the action of series coil 4 of relay 5 when the
tion; and
Fig. 2 is a similar view showing a second em
starting motor is energized for cranking purposes. 50
bodiment of the invention.
Referring ?rst to Fig. 1 of the drawing, there
is illustrated an electrical starting system for an
Means are provided for opening the contacts I6
internal combustion engine, not shown, compris
ing a battery I, grounded at 2, and connected by
25. The design of the relay 5 and the strength
of the spring 25 are so related that the cranking
responsive to self-operation of the engine, such
means being illustrated in the form of a spring
2
2,131,403
current will maintain the contacts l6 ?rmly
closed, but when the flow of current in the start
ing circuit is reduced by reason of the relief of
the load on the starting motor when the engine
becomes self-operative, the spring 25 will over
come the action of coil 4 and open the contacts.
In the operation of this device, and starting
with the parts in their normal idle positions as i1
lustrated in Fig. 1, closure of the manual switch
10 l i completes the control circuit from battery I
through leads l2 and I3 to the solenoid l4 and
through lead !5 and contacts I‘! to the ground at
26. The consequent closure of the starting switch
it completes the starting circuit from battery 1
15 through lead 3, series coil ll, lead 6, switch ‘I and
lead 8 to the starting motor and back through the
ground connections 9 and 2.
The heavy ?ow of current through the start
ing circuit caused by the initiation of the crank
ing operation strongly energizes the series coil 4,
causing closure of the contacts l6 and the conse
quent completion of a ground connection from
the control circuit lead E5 to the ground at 21.
The rotation of the engine thereafter causes the
generator to energize the coil 2i of relay l8 su?i
ciently to open contacts l'i, thus breaking the con
nection from the control circuit to the ground
26, but the ground connection established through
the contacts it maintains the control circuit
closed and thus causes the engine to be cranked
continuously until starting occurs.
When the engine starts, the cranking load is
removed from the starting motor whereby the
?ow of current through the starting circuit is
greatly reduced. The consequent weakening of
the series coil 4 permits the spring 25 to open
contacts it, thus opening the control circuit and
deenergizing the solenoid l4 whereby starting
switch I’ is opened.
Contacts ill are held open by the generator G
as long as the engine is in operation, but should
the engine stall, the consequent deenergization
of the relay coil it allows the contacts 8'! to close,
whereupon the starting operation is automatical
1y repeated as above described as long as the
manual switch ii remains closed.
In Fig. 2 there is illustrated another embodi
ment of the invention in which means are pro
vided for assisting the generator to open the re
lay contacts controlled thereby, and also for de
laying reclosure of said contacts while the start
ing motor is spinning by momentum from a previ
ous starting operation.
In this ?gure the starting circuit, the control
a circuit, and the generator relay circuit are all ar
ranged the same as in the embodiment illustrated
in Fig. 1, and the elements thereof are similarly
numbered. In order to perform the above func
tions, however, an additional coil 28 is provided
on the relay l8, which coil is connected at one
end to the ground 22 for the generator coil 2|,
and is connected at its other end by a lead 29 to
the starting motor lead 8 whereby the coil 28 is
placed in shunt with the starting motor when
the starting motor circuit is closed by the mag
netic switch I. It will be noted that when the
switch I is open, the coil 28 is in circuit with the
starting motor so as to be energized thereby when
the armature of the starting motor is spinning by
momentum in its residual ?eld.
In the operation of this embodiment of the in
vention, closure of the ignition switch ll causes
closure of the starting switch I in the same man
ner as previously described, whereby the starting
7 5 circuit is energized to cause the engine to be
cranked. In this embodiment of the invention,
however, closure of the starting switch also causes
energization of the shunt coil 28 which thereupon
assists the generator coil 2] in energizing the re
lay IS and causing the contacts I‘! to open.
Since the series coil 4 is of low resistance and in
ductance and is therefore a quick acting coil, it
e?ects the closure of the contacts 16 prior to the
opening of contacts i? even though the coil l8 be
designed to be su?iciently powerful to open the 10
contacts ll independently of the generator coil
2|. When the engine starts, the contacts l6 are
opened by the reduction in starting current as
previously described, whereby the starting switch
‘i is opened, and the starting motor and the coil
28 are disconnected from the battery.
In case of a false start, that is, when the en
gine makes an explosion or two su?icient to re
lease the starting motor from the engine and
then dies, immediate reclosure of the starting
switch ‘a’ would merely cause the starting motor
to spin without causing the starting gearing to
reengage the engine flywheel, since, as is well
known in the art, acceleration of the starting
motor from a state of rest or of slow rotation
is essential to secure the proper engagement of
the starter gearing. It has been found that the
coil 28 is effective to prevent reclosure of the
contacts El while the starting motor is spinning
by momentum, by reason of a small amount of
current which is generated by the armature of
the starting motor as it rotates in the residual
?eld of the motor, whereby the control circuit
is maintained open until the starting motor
comes substantially to rest. Subsequent closure
of the control circuit and of the starting switch
I thereby causes restarting to occur in the usual
manner.
Although certain forms of the invention have
been shown and described in detail, it will be 40
understood that other forms are possible and
that various changes might be made in the con
struction and arrangement of the elements there
of without departing from the spirit of the in
vention as defined in the claims appended hereto. 45
What is claimed is:—
1. In an electrical system for internal combus
tion engines, an engine-driven generator, a start
ing system including a starting motor and a mag
netic switch therefor, a control circuit for said 50
magnetic switch including two circuit-closing de
vices in parallel, one of which is normally closed
and the other normally open, means energized
by closure of said magnetic switch for closing
the second said device, means energized by said
generator for opening the ?rst said device, means
also energized by closure of the magnetic switch
for assisting the generator means in opening the
?rst said device, and means for overcoming said
closing means and opening said second device 60
when the engine becomes self-operative.
2. In an electrical system for internal combus
tion engines, an engine-driven generator, a. start
ing system including a starting motor and a
magnetic switch therefor, a control circuit for 65
said magnetic switch including two circuit~clos~
ing devices in parallel, one of which is normally
closed and the other normally open, means ener
gized by closure of said magnetic switch for clos
ing the second said device, means energized by 70
said generator for opening the ?rst said device,
means also energized by closure of the magnetic
switch for assisting the generator means in open
ing the ?rst said device, and means for overcom
ing said closing means and opening said second 75
3
2,131,403
device when the engine becomes self-operative,
said assisting means being arranged to hold said
?rst device open, in case the engine stops, until
the starting motor comes substantially to rest.
3. In an electrical system for internal combus
tion engines, an engine~driven generator, a start
ing system including a starting motor and a
magnetic switch therefor, a control circuit for
said magnetic switch including two relays with
1 0 their contacts in parallel, one relay being nor
mally closed and the other normally open, the
?rst relay having a coil energized by said gener
ator for opening its contacts when the engine is
rotated, the second relay having a coil in series
with the starting motor for closing its contacts
when the motor cranks the engine, and a spring
for opening said second relay when its coil is
weakened by the relief of the load on the start
Cl
ing motor when the engine starts, said ?rst relay
also having a coil in shunt with the starting
motor during the starting operation for assisting
the generator coil to open its contacts.
4. In an electrical system for internal combus
tion engines, an engine-driven generator, a start
ing system including a starting motor and a
magnetic switch therefor, a control circuit for
said magnetic switch including two relays with
their contacts in parallel, one relay being nor
mally closed and the other normally open, the
first relay having a coil energized by said gener
ator for opening its contacts when the engine is
rotated, the second relay having a coil in series
with the starting motor for closing its contacts
when the motor cranks the engine, and a spring
for opening said second relay when its coil is
weakened by the relief of the load on the starting
motor when the engine starts, said ?rst relay also
having a coil in shunt with the starting motor
during the starting operation for assisting the
generator coil to open its contacts, said assisting
coil being in circuit with the starting motor when
the magnetic switch is opened, whereby spinning
of the starting motor by momentum retains
su?icient magnetism in said ?rst relay to prevent *
reclosure of its contacts.
LESLIE K. LOEHR.
WAYNE E. BURDICK.
Документ
Категория
Без категории
Просмотров
0
Размер файла
422 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа