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Патент USA US2130907

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Sept- 20, 1933-
o. SIEIDENBERG
2,130,907
CLUTCH MECHANISM FOR MOTOR CARS
Filed ‘April 28, 19:50
ATTORN EYS
2,130,901
Patented Sept. 20, 1938
PATENT OFFICE
1 UNITED STATES
2,130,907
CLUTCH lVIECHANISM FOR MOTOR CARS
Otto Seidenberg, Berlin, Germany, assignor, by
mesne assignments, to Bendix Aviation Corpo
ration, Chicago, 111., a corporation of Delaware
Application April 28, 1930, Serial No. 448,028
In Germany May 1, 1929
7 Claims.
V Thisiinvention is concerned with a clutch mech
(Cl; 192—-.01)
either the conduits l5, l6 from the manifold 9
anism'for ‘motor driven vehicles in which the
gas pedal or accelerator is’exclusively used for
throwing the clutch into and out of action.
In devices of this kind it is of particular im
5
portance that all the movements of the pedal are
transmitted on’ the throttle valve of 'the car
burettor and the, control valve for the vacuum
cylinder for the clutch motion with a certain play
10 and as softly as possible in order that heavy
shocks are avoided upon the clutch being thrown
in or out of action. According to this present in
vention I obtain this result by arranging the
known'lost motion between the control valve and
the gas pedal within the‘ valve itself without in
crease of its stroke whereas simultaneously the
7 outlet for the air from the operating cylinder for
the clutch can be controlled by a brake valve con
trolled‘ by the operating piston in its one end
20
position.
‘
I
'
Inlorder that myinvention may be readily
understood by those skilled in the art reference
may be had to the drawing illustrating a pre
ferred- embodiment of my invention, and in which
Fig; 1 is a diagrammatic illustration of my
25
complete clutch operating system,
' Fig. 2 a section of the operating cylinder for
the clutch movement, and the retarding or throt
tling valve associated with the said cylinder,
Fig. 3v a section of the reversing valve.
' The clutch mechanism comprises a reversing
to the operating cylinder 2 are open and the air
passage l9 leading from the interior of the valve
casing to the outer atmosphere is closed, or that
this latter passage is open and the communication
of the cylinder 2 with the manifold 9 is inter
rupted. The valve I thus may in fact permit,
under certain operating conditions, an in?ow of
fresh air into the manifold 9 during the move
ment of the valve member l8. However, since 10
the stroke of this member is very small and usu
ally does not exceed 3 mm., and since this stroke
is performed very quickly, the volume of the fresh
air thus supplied to the manifold 9 is so small
that it is of no signi?cance for the operation of 15
the motor.
It is Well known that with clutch mechanisms
of the character described, a certain amount of
play or lost motion is introduced between the
pedal 1 and the valve member l8 in order that the
further movement of the gas pedal after clutch
engagement may take place without obstruction
or hindrance.
As far as I know this play or lost
motion has, with formerly used devices, been
interposed into the operating linkage outside the
valve casing by the controlling cone or valve mem
ber l8 being extended outside the casing by means
of a rigidly acting pin or rod within which, that
is outside the valve casing, the play or lost mo
tion was arranged. This known device was ob 30
jectionable in that the controlling cone or valve
tarding or throttling valve 3 and a controlled
member was put under tilting strains so that it
could not be uniformly pressed upon its point or
nozzle 4. 'A cut-off cock 5 permits the operator
to put the wholev system out of operation.
quently leakages were produced which are very 35
valve i and operating cylinder} having a re
Within the reversing valve I I arrange a valve
member ltiwhich is’ connected by a linkage 8 with
the gas pedal 1 being under the in?uence of a
tension‘ spring 6. The casing of valve l is con
40 nected with‘ the manifold 53 of the machine driv
ing combustion engine and with the clutch actu
ating cylinder 2 by conduits l5, 16, the valve
member 18 governing the movements of a piston
I1 reciprocating within the cylinder 2 as will be
explained more in detail hereinafter.
The carburettor ID carries the throttle valve
actuating lever l2. which is under the in?uence
of a tension spring H and which. is connected
by a linkage l3 with the gas pedal .1, the said
linkage being provided with aiplay or lost motion
M, permitting thepedal l’ to rock a certain
angular distance, beforeany vaction on the throt
tle valve is produced. The linkage 8 acts on the
valve‘member ill ‘of the valve lnwhich is con
552‘ structed‘and. actingas 'athree-waywalve so that,
cone in an exactly axial direction, so that fre
objectionable
view of the comparatively small
vacuum.
In accordance with this present invention I
avoid this objection by constructing the valve as
illustrated in Fig. 3. Accordingly the conical
valve member I8 is separately guided within the
valve casing l whereas the rod 8 actuating the
valve member has no rigid connection therewith
but may freely slide within the central bore or
recess 3| of member 18, the rod 8 having at its
one end merely an enlarged head 32 by which the
valve member 18 may be slid against the action 01
a spring 33 so as to establish communication of
the conduits l5 and I6. It will be readily appre
ciated that by this construction an exactly axial
motion of the valve member may be obtained so
that the same may always be in an exact and tight
contact with its valve seat.
Within the cylinder 2 I arrange an operating
piston H which acts on. the vehicle clutch so as. 55
2
2,130,907
to throw the same into or out of operation, Fig. 2
illustrating the operating system in the position
of the parts which they assume when the clutch
is thrown out. The piston I1 is, by means of
the piston rod 23, connected with the clutch oper
ating lever 2|, the latter being under the in?u
ence of a suitable clutch spring 22 tending to
throw the clutch into action and to move piston
I1 towards the left hand end of its cylinder 2
10
(Fig. 2). The piston may also be acted upon by
the vacuum existing within the manifold 93, this
vacuum communicating with the rear end of the
cylinder 2 by the conduits I5 and I6 when the
control valve I I is correspondingly adjusted. It
15 will be understood that whenever the vacuum
within the manifold '9 is communicated to the
cylinder 2 the piston I1 is retracted into its clutch
opening position contrary to the action of the
clutch spring 22.
a
The vacuum might be very abruptly destroyed
in the rear end compartment of piston I 'I by
the operation of the control valve I resulting in
the clutch being thrown in with a shock or snap
action. According to a further feature of my
25 invention there is provided a brake mechanism
braking the piston I‘! in its clutch engaging
movement so that the clutch may be shifted into
operation in a soft manner. This retardation or
braking of the movement of piston I‘! is obtained
byv the retarding or throttling valves 3 and 4
carried by the operating cylinder 2 and dash
respectively the valve 3 being acted upon imme
diately before the clutch is engaged by an ad
justable driver 24 carried by the piston rod 23
and co-operating with a disc 26 on the valve
'
40?
spindle 25. When the piston rod 23 is projected
by clutch spring 22 after the vacuum conduits
I5, I6 are interrupted by valve I, the driver 24
pulls the valve rod 25 forwardly, compressing a
spring 2?, so that the spring 28 of the valve disc
29 may operate the retarding valve 3 and close
the air exit passage 29' indicated in Fig. 2 by an
arrow, so that the air contained within the cyl
inder may only be discharged through a conduit
445' 3!] being under the manual control of valve 4 on
the dash of the vehicle. When the piston I“! is
retracted it permits a return of the valve rod 25
under the action of the spring 21 lifting the valve
disc 29 from its seat against the action of spring
501 28 so that the retarding valve is again opened
and the piston II is immediately retracted into
its clutchdisengaged position.‘ In Fig. 2 the plain
lines illustrate the clutch disengaged and the
dotted lines the clutch engaged position of the
55 piston rod 23. The'control nozzle 4 connected
with the operating cylinder by tube 30 serves
to permit a controlled egress of air from the
cylinder and thus effect passage and thus a soft
and resilient clutch engaging action of the clutch
60 which may be perfectly accommodated to the
character of the respective clutch construction.
The operation of the reversing valve I requires.
that a lost motion M be arranged in the linkage
I3 in order that the valve I may at ?rst be oper
65 ated without in?uencing however the position of
the throttle valve I 2.
'
v The operation of the new clutch system is as
follows:
i
'
In the diagram Fig. 1 the gas pedal is assum
70 ing its position I at which the motor is running
idle and the clutch has not yet been thrown into
action. The reversing valve I is closing the air
passage I9 and is establishing communication
' between the manifold 9 and the clutch operating
cylinder 2 so that the vacuum existing within
the manifold 9 when the machine is running
will now act on the cylinder 2 and retract the
piston l1 into its clutch disengaged position ten
sioning the clutch spring 22. The clutch is thus
thrown out and the motor running idle.
7
If now the gas pedal or accelerator ‘I is rocked
into the position II there results an operation of
the valve I8 and the position of the throttle valve
I2 of the carburettor I0 is in no way changed, on
account of the lost motion I4 interposed into the 10
linkage I3. The motor is thus still running idle;
the reversing valve I has now however inter
rupted the vacuum conduit to‘ the manifold 9
and established communication with the outer
atmosphere, that is established a communication 15
between the valve passage I9 and the passage I5
leading to the rear end at the cylinder. Accord
ingly air of atmospheric pressure then flows into
the compartment behind the piston I1 so that
the vacuum is destroyed and the clutch spring
22 permitted to rock theclutch lever ~2I into its
clutch engaged position. Since at this stagev of
the operation the retarding or braking valve 3
is still opened this movement of piston-l1 is at
?rst performed rather quickly, the movement 25
being however retarded or braked immediately
before’ the clutch is thrown in, since the driver
21?- of the piston rod 23 closes the valve 3 as above
explained. The air which is still within the cyl
inder 2 will thus be compressed by the piston I1
so as to retard the movement thereof, the air
being permitted to escape at a slower or quicker
rate depending upon the adjustment of the con
trol cook or nozzle 4. Accordingly the clutch is,
as a result of this air cushioning effect, thrown
softly and resiliently into action,
If the gas pedal 1 is in its position III, the
reversing valve I is still in the same adjustment
as before. The pressure conditions within the
operating cylinder remain the same. The clutch
remains engaged and the motor is now running
with full speed or power since the gas lever 'I
has now fully opened the throttle valve I2 of
thercarburettor, the fuel inlet to the carburettor
thus being controllable within the range between
the positions II and III.
45
,
The braking of the motor is effected in the
following way:
If the gas pedal 1 is in’ its position II, the motor
is running idle and the clutch engaged, as above 0
described. In this condition the motor may act
as a brake as will be readily understood by those
familiar with this art.
'
As is obvious from the above speci?cation the
clutch mechanism may be described as a self- ,
contained independent unity. The same can
thus be mounted upon an automobile of any type
and size, the simplicity of the'whole system per
mitting the use ofrstandard parts for construct
ing it and even permitting the motorcar driver 60
of average skill to himself install the above de
scribed clutch operating system on his vehicle.
I claim:
a
.
1. In a motor vehicle, the combination, with
the engine and its manifold, the accelerator, and
the clutch mechanism, of a cylinder closed at
both ends having a piston reciprocating therein,
an operative connection between said piston and
the clutch mechanism, a fluid transmitting con
nection between said cylinder at one side of the 70
pistonand said manifold, means controlled by
said accelerator for opening and closing said
fluid transmitting connection, the chamber of
the cylinder located at the side of the piston
opposite. to the. part communicating with said
75 1
2,130,907
manifold communicating with the outer air, a
normally open valve adapted partly to close said
chamber, and means controlled by said piston
operative near the end of the clutch closing
stroke thereof for moving said valve into position
for partly closing said chamber and adapted upon
the return stroke of said piston to move the valve
into opening position.
2. In a motor vehicle, the combination, with
the engine and its manifold, the accelerator, and
the clutch mechanism, of a cylinder closed at
both ends having a piston reciprocating therein,
an operative connection between said piston and
the clutch mechanism, a ?uid transmitting con
15 nection between said cylinder at one side of the
piston and said manifold, means controlled by
said accelerator for opening and closing said ?uid
transmitting connection, the chamber of the cyl
inder located at the side of the piston opposite
20 to the part communicating with said manifold
3
valve adapted to close said opening, means con
trolled by said piston and operative near the
end of the clutch closing stroke for moving said
valve into position for closing said opening and
other means adapted to return the same into
opening position upon the return stroke of said
piston, and means for regulating said vent.
5. In a motor vehicle, the combination, with
the engine and its manifold, the accelerator, and
the clutch mechanism, of a cylinder closed at 10
both ends having a piston reciprocating therein,
an operative connection between said piston and
the clutch mechanism, a ?uid transmitting con
nection between said cylinder at one side of the
piston and said manifold, the chamber of said
cylinder located at the side of the piston oppo
site to the part communicating with said mani
fold being open to the outer air, a valve adapted
partly to close said chamber to the outer air,
springs acting on said valve one tending to move 20
being open to the outer air, a normally open valve
adapted partly to close said chamber, a spring
tending to move said valve into position for open
ing said chamber to the outer air, and means
25 connected with said piston and adapted near
the end of the clutch closing stroke of the piston
to relieve said valve of the pressure of said spring
and to allow the same to move into position for
partly closing said chamber to the outer air.
3. In a motor vehicle, the combination, with
30
the same into opening position and the other
tending to move the same into closing position,
the clutch mechanism, of a cylinder closed at
both ends having a piston reciprocating therein,
an operative connection between said piston and
35 the clutch mechanism, a ?uid transmitting con
nection between said cylinder at one side of the
piston and said manifold, the chamber of said
piston reciprocating therein, an operative con
nection between said piston and the clutch mech
anism, a ?uid transmitting connection between
said cylinder and said manifold, and a valve con
trolled by said accelerator for opening and clos
ing said ?uid transmitting connection, said valve
the engine and its manifold, the accelerator, and
cylinder located at the side of the piston opposite
to the part communicating with said manifold
4:0 being provided with an opening and a vent, a
valve adapted to close said opening, and means
controlled by said piston and operative near the
end of the clutch closing stroke thereof for mov
ing said valve into position for closing said open
45 ing and other means adapted upon the return
stroke of said piston to return the valve into
opening position.
4. In a motor vehicle, the combination, with
the engine and its manifold, the accelerator, and
the clutch mechanism, of a cylinder closed at
both ends having a piston reciprocating therein,
an operative connection between said piston and
the clutch mechanism, a ?uid transmitting con
nection between said cylinder at one side of the
piston and said manifold, the chamber of said
cylinder located at the side of the piston opposite
to the part communicating with said manifold
being provided with an opening and a vent, a
and a stern acting on said spring tending to
hold the valve in opening position and adapted
to be engaged by said piston moving into clutch 25
applying position near the end of the clutch clos
ing stroke thereof for rendering said spring tend
ing to open the valve inoperative.
6. In a motor vehicle, the combination, with
the engine and its manifold, the accelerator, and 30
the clutch mechanism, of a cylinder having a
comprising a casing included in said fluid trans
mitting connection, a valve body slidable in said
casing, a spring acting on said valve body in a 40
direction for closing said ?uid transmitting con
nection, and a stem connected with said acceler
ator and movable relatively to said valve body in
the direction of the action of said spring and
adapted for positive engagement therewith when 45
moving in the other direction.
7. In apparatus of the class described, a cylin
der having cover plates at its ends, a piston in
said cylinder, means for connecting one end of
said cylinder to a source of lower than atmos~ 50
pheric pressure, a relatively large opening at the
other end of the cylinder, a valve adapted to
be operated by movement of said piston to close
said opening, a restricted air outlet at said last
named end of said piston whereby said piston and 55
cylinder act as a dashpot when said relatively
large opening is closed.
OTTO SEIDENBERG.
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