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Патент USA US2107724

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Feb- 8, 1938-
2,107,724
RS. WHITTINGTON
AUTOMATIC CLUTCH CONTROL DEVICE
Filed Aug. 29, 1932
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2 Sheets-Sheet 1
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INVENTOR. L
Feb. 8, 1938.’
R. s. WHITTING'ILON
- 2,107,724
AUTOMATIC CLUTCH CONTROL DEVICE
Filed Aug. 29, 1932
2 Sheets-Sheet 2
711111111111:
' Patented Feb. 8, 1938
' _ 2,107,724
UNITED srAras PATENT OFFICE
2.107.724
AUTOMATIC CLUTCH CONTROL DEVICE
Ralph s. Whittlngton, Oak rm, m, mums to
Bendix Products Corporation, South Bend, Ind.,
a corporation of Indiana
‘Application August’ 29, 1932, serial No. 630,861
17 Claims.
I
This invention relates to vacuum operated
automatic control means for use in actuating
the clutch of an automotive vehicle or the like.
The primary object of this invention is to pro
; vide a control means of the above mentioned
character which providesautomatic control of _
the clutch plates at their initial contact'when
clutch engagement is being made, andthereby
insure proper clutch engagement.
1o '_ A further object of this invention is to pro
vide a control means that requires the minimum
of adjustment after it is’ installed on the vehicle,
and to provide simple adjustments where they
are necessary.
16
-
Still further this invention provides a control
means of the above mentioned’ character which
can readily be adapted to systems now in produc
tion, thus greatly improving the action of such
systems with the minimum changes in construc
20
tion.
~
'
‘
(Cl.192-.01)
the clutch plates wear, adjustments that have
proven to be very delicate. must be made.
This invention provides a check valve sensi
tive to the pressure developed in the power cyl
inder by the clutch springs to restrict or stop
the motion of air from the power cylinder at
the initial engagement of theclutch.
-
This invention also provides that the above
check valve may close the vacuum side of the
power cylinder from the atmosphere at the in
itial engagement of the clutch, thereby making -
possible the complete control of the clutch plates
during their final engagement by the use of
suction and air inlet connections to the vacuum
side of the power cylinder, controlled either by
the throttle valve or by an accelerator operated
valve.
‘
-
Referring then to the drawings there is shown
in Fig. 1 a system composed of a conduit l which
is adapted to be connected to the intake manifold
0
This invention further provides a means adapt: ' of the motor of the vehicle with which the sys
able to such a system of controlling the clutch tem is associated. The conduit l is provided
plate pressure "during the period oi’ clutch en
with lateral extension 2 which contains the bore, '
gagement by the position of the accelerator or 3 which slidably receives the plunger 4. Plunger
throttle valve.
_
4 is connected by a suitable linkage 5 to the
Numerous other objects and advantages will ' accelerator pedal 6. Plunger 4 divides conduit
become more apparent as the following descrip
tion proceeds, particularly when reference is had
l into passages ‘l and 8 and controls communi
cation between passages 1 and 8, and between
passage '8 and the atmosphere by virtue of re
30
Fig. 1 is a semi-diagrammatic view partly in - duced portion 9 of plunger 4, groove lllin plunger
section of a control means constructed in accord
4, and port I l in extension 2. The end of con ea 0
ance with this invention.
duit l is tapped into the power cylinder I2 which
Fig. 2 is a semi-diagrammatic view partly in‘ slidably receives the piston l3. Piston I3 is oper
section of a modi?ed form of the control means
atively connected by pull rod I4 to the clutch I
' .
35. illustrated in Fig. 1.
plate l5 which is actuated to engage clutch plate 35
Fig. 3 is a semi-diagrammatic view partly in - It by clutch springs II. The pull rod I4 is fur
section showing how the system of Fig. 1 is con
ther provided with the groove l8. Inlet check
nected to the motor of the vehicle.
valve l9 and outlet check valve 20 communicate
In general this invention provides means for ‘ with chamber 2| of the power cylinder l2. Plug
'40 automatically releasing and engaging the clutch
20' adjusts the pressure at which check valve 20
.
of a motor vehicle by the use of intake manifold opens.
vacuum, controlled by the accelerator or by the
Extension‘2 also contains the bore 22 which
to the accompanying drawings.
-
actuation of the throttle valve, thereby making 7 slidably receives the piston 23. Piston 23 is pro
vided with the taper 24, and is actuated by spring
it
unnecessary to depress the clutch’pedal'manu
4
ally while shifting the gears of the transmission, 25, and by vacuum‘ acting thru the conduit 26 45
and also provides the‘vehicle with free wheeling. which is adapted to be connected to the intake
In devices now in productionv of the above manifold at a point .where vacuum in induced
character using a power cylinder tov actuate the by the speed oi.’ the motor.
Chamber 2| of power cylinder I 2 is provided
clutch,
the
clutch
plates,
are
arrested'in
their"
5
with an outlet thru a conduit providing the pas
- motion toward engagement by-the' closing or re
striction of the air passage allowing the'clutch
sage 21 to the atmosphere controlled by the taper
24 of valve 23 and by the plunger 4 and its
to move toward engagement at the proper time. \ taper
28.
I
This method necessitates accurate control of the
55 dimensions of a number of parts, and as soon as
In Fig. 3 the relation of the motor of the ve
hicle to the system of Pig. 1 is shown. The mo
aromas
Groove l8, when it ls-in register with the end
of cylinder l2, as shown in Fig. 1, forms an outlet
from chamber 2i. But as the clutch moves
tor of the vehicle is denoted by the numeral E0,
and the intake manifold by the numeral 55. The
conduit 52 provides a passage from the conduit
l to the manifold 5i. The conduit 25 is tapped
into the intake system at the port 53. The spring
toward engagement, the groove l8 moves out of
chamber 2i closing this exit of air from chamber CH
2i. It is desirable for this to happen before the
55 is secured to the manifold and urges the throt
engagement of the clutch so that the valve 20, the
tle valve 33 to a closed position as shown in Fig.
3. The spring 56 urges the accelerator pedal 5 passage 21, valve 23 and valve 4 will control the
engagement of the clutch as described. Also the
to the released position as shown in Fig. 3.
In Fig. 1 allparts are shown‘ as they are while i groove 58 should close the exit of air through
10
the motor idles. Vacuum is present in the intake groove it from chamber 2! a sufficient distance
before the engagement of the clutch- to insure
system, and while the accelerator pedal b is re
that the groove I8 will always be closed before
leased this vacuum. can act past the plunger él,
the engagement of the clutch regardless of the
exact length of the pull rod it and location of
groove it. This is advisable since certain vari
ations in the manufacture and assembly of such
parts will occur. likewise the clutch plates will
wear duringthe life of the vehicle and it is there
fore undesirable to have the groove i8 function BO
by virtue ofthe reduced portion 9, and'thru pas!
15 sage 8 to the piston i3 reciprocating in the power
cylinder 62. This allows atmospheric pressure
acting thru check valve id to force piston E3 to
the position shown in Fig. l and release the
clutch.
.
.
.
0n the actuation of the accelerator pedal t
.the plunger 6i is moved forward closing o? the ‘ at the initial engagement of the clutch. The pur
vacuum in passage ‘l and opening passage 3 to the pose of groove i8 is to provide an outlet of low
atmosphere thru groove id in plunger‘d‘and port resistance from chamber 2! during the ?rst part
ii in extension 2. -The linkage to the throttle only of ‘the motion of the clutch toward engage
ment. After the groove it closes, air escapes
25 valve ‘is such that the motor is properly acceler~
from the chamber 2! though the valve 28 until
ated by this action.
Atmospheric pressure is now present in pas
sage t, and the clutch springs ill can now force
the clutch toward engagement by forcing the air
30 in chamber-2i thru the check valve lit. However
at the initial engagement of the clutch, the de
crease in tension of clutch springs ll’ causes a
drop in pressure in the chamber 2 i. This drop in
pressure allows check valve in to close, arresting
vas
the motion toward engagement of the clutch.
'
A drop in pressure within the chamber 2i oc
curs as soon as the clutch plates iii and it en
~ gage because the tension of springs ll which
has been exerted on pull and it, begins to be
'40 transferred against the plate it. It is obvious
this valve closes at the initial engagement of the
clutch due to the decrease in pull of the clutch
springs ll on the pull rod It, and the correspond
ing drop of pressure in‘ chamber it. Thus valve
28 acts to automatically arrest the motion of the
clutch toward engagement at the initial engage
ment of the clutch.
An accelerator pedal e is depressed, the taper
2d of the plunger 4 moves into register with pas
sage 2? thus completing an air outlet from the
chamber 2!. Therefore clutch engagement can
be completed at a‘rate increasing as the acceler
! ator t is depressed.
_
The valve 23 further controls the capacity of 40
the passage 21.‘ This valve is not necessary to an
operable system, but makes possible a good clutch
engagement when the throttle is suddenly opened
that after the clutch completely engages there
will be no tension in- pull rod it, and hence no
tendency to build up a pressure in chamber 26.
This explains why there must be a drop of pres ‘ wide for. a rapid standing start, and also insures
the proper clutch‘engagement while shifting the
sure in chamber 2i at the initial clutch engage
is ment,
and when this drop in pressure occurs, gears of the transmission at any speed.
Conduit 26 is tapped into the intake system at
check valve '29 closes, preventing the clutch from
completely engaging at this time. .. This is true theport 53, Fig. 3. ‘Thus at a motor'idle or while
' only if the accelerator pedal 6 is slightly depressed ‘ the motor is operating with the throttle valve
50 so that passage 2i is still closed. However,- if but slightly open, the'vacuum in conduit 26 will
pedal 6 is depressed far enough to bring taper be sufficient to hold valve 23 in the position shown
.28 of piston d in register with passage 21, then the in Fig. 1, and hence taper 24 of the piston 23 will
clutch "engagement will only be retarded by the not restrict the passagejl. However, when the
throttle valve is open and the motor speed is slow,
closing of check valve 20.
The groove it in pull rod M is optional, but can the vacuum in conduit 26‘ will be low and the
be used to provide an additional outlet from the spring 25 will move the valve against atmospheric
chamber 28 during the greater portion. of the pressure acting through port 29, and then taper
motion toward engagement of the clutch. 24 on piston 23 will have moved to restrict the
Groove'l8 does not determine the pointat which passage 21. As the speed of the motor is in
‘so the clutch is arrested, but check valve 20 does creased, vacuum will be generated in the intake
this at the initial engagement of the clutch. system at the point the conduit 26 opensninto the
Groove l8, if used, should be arranged so that'it intake system due to the velocity of gas passing
closes the air outlet from chamber 2i enough he
through the intake system. Thus vacuum will
forethe initial engagement of the clutch to~ in
exist in the conduit 26 even when the throttle
was sure that check valve 20 will always control the valve of the motor is open. The result is’ that
intial engagement of the clutch.
atmospheric pressure acting through port 29 on
There is always some wear of clutch parts and
piston
23 will overcome spring 25 and begin to
linkage, and also some variation in ‘the assembly
‘of these parts. Hence if groove I8 is used it move taper: 24 out of'register with the passage
21 and hence decrease the resistance of passage
should be arranged to close the exit from cham
.79 ber
2| soon enough that any normal wear of parts 21. The faster the motor speed the greater will
or variation in assembly would not allow the be the motion of the piston 23 in this direction,
groove Hi to remain open long enough to allow ‘and piston 23 will move until at some pre-deter
even partial clutch engagement, for this would mined speed the valve will occupy the position
75 interfere with the correct functioning of valve 20. shown in Fig. l regardless of the fact that the
60
65
70
15
v2,107,704.
3
in relation as. volume of air to be released
general vacuum condition in the intake system is
'“very low.
‘
'
from chamber!
the valve 24d can be held in
However, while shifting the gears of the trans ' approximately th position ‘shown in Fig. 2, until
mission vacuum will be presentin conduit 25 due the clutch plates partially engage, at which time
to the velocity of gas in the intake system. This the valve 23a will be-forced to the right by the
vacuum will increase with the motor speed for spring 45. The capacity of conduit 39 should
any ‘setting of the throttle valve, and hence the ‘ be comparatively large so that only a small pres
faster the motor is turning, the less the restriction sure drop will take place in it. Then more pres
of ‘passage 21 will be due to the taper 24 on valve sure ‘will be available at the valve 20a to force
23, and the action of atmospheric pressure thru it open as shown in Fig. 2. The greater part of
port 29. Therefore the faster the motor is tum
the pressure drop between the chamber Zla and
ing, the faster the ?nal engagement of the clutch the atmosphere must take place at the port 40
will be made. This action has been found to be and the taper 4|, and this pressure drop in re
desirable.
‘
'
lation to the area of the end of valve 20a will be
In Fig. 2 is illustrated a slightly modified form I equal to the force of spring 45 at the position the
of the system shown‘ in Fig. 1. Here direct con- , valve 20a will assume as the clutch moves to
nection to the accelerator pedal is eliminated.
The carburetor riser 30 is divided into passage
3|, adapted to be connected to the intake mani
fold, and passage 32, adapted to be connected to
the carburetor, by the throttle valve 33. Port 34
formed, in carburetor riser 30 communicates with
ward its initial engagement. Further, this posi
tion of valve 20a- will allow communication be
tween passages Baand 822 until the initial clutch
engagement.
20
In regard to the cross sectional area of port
40, this port is preferable not round but rec
bore 3a thru passage 35 and with passage 8b
tangular so that its area will be less‘ than the
thru conduit 36, valve 23a and conduit 31., Dia ‘area of the conduit 33. However the shape of
phragm 38 and spring 25a actuate valve 23a. port 40 is optional, but its area must be less ‘
Check valve 20a is actuated by spring 45 which than that of the‘ conduit 39. ‘ However, at the ,in
is adjusted by plug 41. Valve 20a is arranged to _ itial engagement of the clutch plates, there is
close passage 8a from passage ill) at a predeter
. mined drop in pressure in chamber 2 la. Conduit
39 provides an outlet from chamber 2 la thru port
40, which is restricted by the taper 4| when
check valve 20a closes.
'
In the operation of the system, vacuum from
passage 3| acts thru port 34, while the motor
a drop in pressure in the chamber 2|a due to
the decrease inv tension in the clutch springs
Ho, and this drop in pressure is transmitted to 3.)
the'check .valve 20a, allowing spring 45 to close
‘check valve 23a at the initial clutch engagement.
Air is still allowed to escape from chamber Zia
by virtue of the taper 4|, which decreases the
idles, and on plunger 4a allowing atmospheric capacity of port 40 as the check valve 20a closes,
pressure acting thru-port 42 of extension 2a'to but still provides for a ?nal clutch engagement
overcome spring‘43 and move plunger 2a to the
positionshown'in Fig. 2. Then by virtue of re
duced portion 9a of plunger 4a, vacuum acts
past plunger 4a to passage 8a, and thru groove
44 of check valve 20a. This allows atmospheric
pressure acting thru port 40, and also‘thru' check
valve I91; and conduit 39, to overcome spring 45
and hold valve 20a in the position shown in Fig.
2. Then a direct path is provided. from the intake
manifold to the power cylinder |2a allowing at
mospheric pressure acting thru check =valve 19a
to move piston |3a to the positon shown in Fig.
2 thereby releasing the clutch. Upon the actu
equal in speed to the maximum requirements
of the system.
_
1.
‘ 'As soon however as the check valve 20a closes,
‘passage 84: is closed from passage 8b, making ‘
further motion of piston |3a dependent on con
ditions in conduit 31.
' Port 34, spring 43 and other related parts are
also arranged so that the vacuum in conduits 36
and 31 is of su?icient magnitude to hold the
piston |3a at approximately the position it has
when check valve 200 closes, but not. great
enough in magnitude to completely- release the
‘clutch. Then as the throttle valve 33 is opened
ation of throttle valve 33 to accelerate the motor,_ further, there is a corresponding drop in vacuum ,
less of the area of port 34 is exposed to vacuum
inv passage 3| and more of its area is exposed
to vnear atmospheric pressure in passage 32. Thusv
vacuum will drop in conduit 35'as the throttle
Ll valve is opened, and the size and shape of port
34 as well as the spring 43 and ~other related
in conduits 36 and 31 which'will cause a further
engagement of the clutch, and if the throttle
valve is partially closed, there will'be an in
crease in vacuum in conduits 36 and 3‘! partially
releasing the clutch. Thus the clutch plate pres
sure depends on the position of the throttle
valve 33 while it passes the port 34.
The conduit 26a is tapped in to the intake
system at a-point where vacuum is induced by
the velocity of gas in the intake system, and
parts are so7arranged that spring 43 closes
plunger 4a at the correct motor speed. Thus
vacuum from passage ‘la is shut off, and atmos
phere is admitted to passage 8a by virtue of port
Ha in extension 2a and groove |7|Ia in plunger the function of the valve 23a is the ‘same as the
4a. Atmosphere also passes to passage 8!) by valve/23 of Fig. 1. Here the diaphragm 3B is
virtue of reduced portion 48 of valve 20a. Then used to actuate the valve 23d thereby producing
the ‘clutch spring l‘la by their pull on the pull a ‘greater force to move the valve for a given
LA rod |4a create a pressure in the chamber 2|a
vacuum. When the motor speed is low and the
which is transferred thru conduit 39 to check throttle is opened, vacuum in conduit 26a is low,
valve, 20a,‘ holding it partially open while the giving a high restriction to the air passage from
clutch moves toward engagement by virtue of the port 34 to the passage 31), thereby producing‘ a
air outlet thus provided by the port 40. The slow ?nal engagement of the clutch. But when
pressure developed in the chamber 2|a, before the motor speed is fast there is a vacuum in con
the clutch plates have engaged to ‘any degree, dui't 26a even when the throttle is wide open and
exerts a‘force on the valve 20a greater than the this vacuum will increase as the motor speed
force of spring 45, and hence by having the proper increases. Consequently, the faster the motor
"estriction of the port 40 formedby the taper is turning, the less the restriction of thevalve
4| and by forming the port. 40 the proper size 23a to the passage of air, due to the taper 24a
l
4
aioavaa
_
on the valve 28a, and to the action of atmos-l ‘ gaged position, a mechanism for controlling the
pheric pressure thru ports 2% and 46. The
above increase in vacuum applies to any given
position of the throttle valve. The vacuumin
creases ‘in the conduit 25a as the motor speed
increases for any ?xed setting of the throttle
ing a passage between the intake system of‘ the
valve 33, and this feature provides for proper
mechanism is in its closed position, ‘to open said?
clutch contact after shifting the gears of the
passage whereby vacuum from said intake sys-'
tem actuates said pressure responsive member to
release the clutch, means operating upon the 10
actuation of said acceleration control mechanismv
transmission at any speed. '
10
acceleration of the motor, a pressure responsive
member for releasing said clutch, means provid
The valve 234:. controlling the capacity of. the
passage from port it ‘to the passage 3b is not‘
motor and said vpressure responsive ‘member,
means
operating,
when
the
aforementioned
a necessary part (of this system, and should be
to. reduce the vacuum acting on said pressure re
considered only as a re?nement.
sponsive member whereby 'said clutch is moved
While the invention has been described with
some detail, it is to be understood that the de
scription is for the purpose of illustration only
toward engaged position, a valve responsive to
and is not to be construed as de?nitive of the
pressure developed, as the clutch is moved toward 15
engagement, on the opposite side of said mem
ber by said means normally holding the clutch
limits of the inventive idea. The right is reserved
to make such changes in the details of construc
20 tion and arrangement of parts as will fall within
the purview of the following claims.
in engaged position, said valve being operable to
interrupt the motion of air allowing said clutch
to move toward engaged position at a predeter; 20
mined drop in pressure incident to the initial
What I claim as my invention is: -
1. In an automatic control means for a motor ‘
: vehicle, having a motor'and an intake system, a
clutch having means normally holding it in en
engagement of said clutch and means operative
to further modify the pressure acting on said
member whereby clutch engagement is com
pleted.
gaged position, a mechanism for controlling the
4, In an automatic control means for 'a motor
acceleration of the motor, a pressure responsive
means for releasing said clutch, means providing
a passage between the intake system of the motor
vehicle, having a motor and an intake system, a
30 and said pressure responsive means, means oper
25'
clutch having means normally holding it in en
gaged position, a mechanism for controlling the
acceleration of the motor, means providing a pas 30
sage connected to the intake system of the motor,
ating when the motor is idling to open said pas
sage whereby vacuum from ‘said intake system " a one-way check valve, a member for releasing
actuates said pressure responsive means to re
said clutch responsive to suction in said passage '
lease the clutch, means operating upon the ac
and responsive to atmospheric pressure thru said
tuation of said acceleration control mechanism one way check valve, a main valve in said pas 35
- to reduce the vacuum acting on said pressurere
sage operable to control communication between
sponsive means whereby said clutch is- moved to- - said passage and the intake system, and between
ward engaged position, means responsive to pres
said passage and the atmosphere, means oper- ,
sure induced, as the clutch is moved toward en;
gagement, by the force of said means normally
holding the clutch in engaged position to arrest
the motion of said clutch toward engagement at
a predetermined drop in said‘ pressure incident
to the initial engagement of said clutch, and
means operative to further modify the pressure
acting on said pressure responsive means where
by clutch engagement is completed.
2. In an automatic control means for a motor
vehicle, having a motor and an intake system, a
50 clutch having means normally holding it in en
gaged position, a mechanism for controlling the
acceleration of the motor, a pressure‘ respon
sive member for releasing said clutch, means
providing a passage between the intake sys-'
'55 tem of the motor and said pressure responsive
member, means operating when the motor is
idling to open said passage whereby vacuum from
said intake system actuates said pressure re
sponsive member to release the clutch, means
60 operating upon the actuation of said acceleration
. control mechanism'to reduce the vacuum acting
on said pressure responsive member whereby said
clutch is moved toward engaged position, ‘means
responsive to pressure developed, as the clutch
is moved toward‘ engagement, .on the opposite
side of said member by said means normally
' holding the clutch- in engaged position to arrest
ating, when the aforementioned mechanism is in
its closed position, to actuate said main valve to 40
open said passage to the intake system andre
lease said clutch, means perating upon the ac
tuation of said acceleration control mechanism
.to operate said main valve to close said passage
from the intake system and open said passage to
the atmosphere whereby said clutch is' moved
toward engaged position, a second one way check
valve responsive to pressure developed, as the
clutch is moved toward engagement, on the op
posite side of vsaid member for releasing the 50
clutch by said means normally holding the clutch
in engaged position, said second valve being oper
ative to stop the vmotion of air allowing said
clutch to move toward engaged position upon
a predetermined drop in pressure acting on said 56
member incidentl'to the initial engagement of
said clutch, and means operative to further mod
ify the pressure acting on said member whereby
clutch engagement is completed.
5. In an automatic control means for a motor 60
vehicle, having a motor and‘an intake system, a
clutch‘ having means normally'holding it in en;
gaged position, -a mechanism for controlling the
acceleration of the motor, - means providing a
passage connected to the intake‘ system of‘; the 65
motor, a one-way check valve, a member for re
leasing said clutch responsive to suction in said _
the motion of said clutch toward engagement. passage and responsive to atmospheric. pressure
' upon'the initial engagement of said clutch, and
'50 means operative to further modify the pressure
acting. on said member whereby clutch engage
Mjnent is completed.
3. In an automatic control"v means for a motor
vehicle, having a motor and an intake system, a
clutch having means normally holding it in eh
thru-said one way check valve, a main valve in
said passage operable to control communication 70
between said passage and the intakesystem, and
. between said passage and the atmosphere, means
operating, when the aforementioned mechanism
is in its closed ‘position, to actuate said main
valve to open said passage to the intake system
15.
2,107,794
and release said clutch, means operating'upon
the actuation of said acceleration control mecha
nism to‘ operate said main valve to close said
passage from the intake system and open said
passage to the atmosphere whereby said clutch
is moved toward engaged position, a. second one
way check valve responsive to pressure developed,
as the clutch is vmoved toward engagement, on
the opposite side of said member for releasing the
10 clutch by said means normally holding the clutch
in engaged position, said second valve being op
erative to ‘arrest the motion of air allowing said
- clutch tomove toward engaged position upon a
predetermined drop in pressure acting on said
member incident to the initial engagement of
.15
said clutch, means adjusting the pressure at
, which said second one way check valve closes,
and means operative to further modify the pres
sure acting on said member whereby‘clutch en
gagement is completed.
'
‘
,
6. In an automatic control means for a motor
5
clutch is moved toward engagement, on the op
posite side ‘of said member for releasing the
clutch by said means normally holding the clutch
in engaged position, said second valve being op
erative to stop the motion of air allowing said CI
vclutch to move toward engagement upon a pre
determined drop in pressure acting on said mem
ber incident to the initial engagement of said
clutch, and an auxiliary passage for further re
lieving the pressure acting on said member, said 10
auxiliary passage increasing in capacity on the
operation of said acceleration control mechanism,
said auxiliary passage also being controlled in
capacity by an auxiliary valve, said auxiliary
valve being actuated by vacuum in‘ the intake
system of the motor of said vehicle at~a point
where vacuum is induced by the velocity of gas
in said intake system, whereby said secondary
valve increases the capacity of said auxiliary
passage, when the throttle valve of said motor 20
is open, as the motor speed increases.
vehicle, having a motor'and an intake system, a
8. In an automatic control means for a motor
'clutch having means normally holding it in en- ' vehicle, having a motor and an intake system, a
gaged position, a mechanism for controlling‘the clutch having means normally holding it in en- ,
acceleration of the motor, means ‘providing a
passage connected to the intake system of the
motor,‘ a one-way check valve, a member for re
leasing said clutch responsive to suction in said
passage and responsive to atmospheric pressure
thru said ‘one way check valve, a main valve in
said passage operable to control communication
"between said passage-and the intake system, and
, between said passage and the atmosphere, means
operating upon the actuation of said acceleration
control mechanism to operate said main valve to
close said passage from the intake system and
open said passage to the atmosphere whereby said
clutch is moved toward engaged position, a second
one way check valve responsive to pressure de
veloped, as the clutch is moved toward engage
ment, on the opposite side of said member for
releasing the clutch by said means normally hold
gaged position, a mechanism for controlling the
acceleration of the motor, means providing a
passage connected to the intake system of the
motor, a one-way check valve, a member for re
leasing said clutch responsive to suction in said
passage and responsive to atmospheric pressure
thru said one way check ,valve, a main valve in
said passage operable to control communication
between-said passage and the intake system, and
between said passage and the atmosphere, means
operating, whenvthe aforementioned mechanism
is in its closed position, to actuate said main valve 35
to open said passage to the intake system and
release said clutch, means operating upon the
actuation of said acceleration control mechanism
to operate said main valve to close said passage
from the intake system and open said passage to 40
the atmosphere whereby said clutch is moved to
‘ ing‘the clutch inengaged position, said second ' ward engaged position, an individual opening be
valve being operative to arrest the motion of air tween the atmosphere and the side of said mem
allowing said clutch to move toward engaged ber opposite the one exposed to vacuum, said in
position upon a predetermined drop in pressure
dividual opening closing before the initial engage
acting on said member incident to the initial ment of said clutch, a second one way check valve
engagement of said clutch, and means operated responsive to pressure developed, as the clutch is
by said acceleration control mechanism to pro
vide a ‘further relief of said pressure acting on
said member to complete the engagement of said
clutch.
‘
,
'7. Inan automatic control means for .a motor
vehicle, having a motor and an intake system, a
clutch having means normally holding it in en
gaged position, a mechanism for controlling the
acceleration of the motor, means providing a
passage connected to the intake system of the
motor, a one-way check valve, a member for re
leasing said clutch responsive to suction in said
passage and responsive to atmospheric pressure
thru said one way check valve, a main valve in
said passage operable to control communication
between said passage and the intake system “and
between said passage and the atmosphere, means
operating, when‘ the aforementioned mechanism
is in its closed position, to actuate said main‘ valve
to open said passage to the intake system and
release said clutch, means operating upon the
70 actuation of said acceleration control mechanism
, .to operate said main valve to close said passage
from the intake system and open said passage to
‘the atmosphere whereby said clutch is moved
toward engaged position, a second one way check
valve responsive to pressure developed, as the
‘moved toward engagement, on the opposite side‘
of said member for releasing the clutch by said
means normally holding the clutch in engaged 50
position, said second valve being operative to
' arrest the motion of air allowing said clutch to
move toward engaged position upon a predeter
mined drop in pressure acting on said member
incident to the initial engagement of said clutch,
and means operative to further modify the pres
sure acting on said member whereby clutch en
gagement is completed.
9. In an automatic control means for a motor
vehicle, having a motor and an intake system, a
clutch having’means normally holding it in en
gaged position, a mechanism for controlling the
acceleration of the motor, means providing a pas
sage connected to the intake system of the motor, 65
a one-way check valve, a-member for releasing
said clutch responsive to vacuum in said passage
on one face and responsive to atmospheric pres
sure thru said one Way check valve on its opposite
face, a main valve in said passage operable to con
trol ‘communication between said passage and the
70
intake system and between said passage and the
atmosphere, an auxiliary valve operable to control
communication between the atmosphere and the
side of said member exposed to vacuum, means 75
aromas
operating when the motor is idling to open said
passage to said member whereby said clutch is re
leased, means operating upon the actuation of
said acceleration control mechanism to actuate
said main valve to close said passage from the
intake system and open said passage to the at
mosphere whereby said clutch is moved toward
engaged position, an auxiliary passage from said
opposite side of said member to said auxiliary
10 valve, said auxiliary passage forming an outlet for
the gas compressed by said member as the clutch
moves toward engagement, said auxiliary valve
being operable to close communication between
the atmosphere and the side of said member ex
15 posed to vacuum, and restrict said auxiliary pas
sage upon apredetermined drop in pressure inci
dent to the initial engagement of said clutch, and
means operating to further modify the pressure
on said member whereby clutch engagement is
20
completed°
\
10. In an automatic control means for a motor
vehicle, having a motor and an intake system, a
clutch having means normally holding it in en
gaged position, a mechanism for controlling the
25 accelerationof the motor, means providing a pas
sage connected to the intake system of the motor,
~ a one-way check valve, a member for releasing
said clutch responsive to vacuum in said passage
on one face and responsive to atmospheric pres
30 sure thru said one way check valve on its oppo
site face, a main valve in said passage operable to
control communication between said passage: and
the intake system and between said passage and
the atmosphere, an auxiliary valve operable to
35 control communication ‘between the atmosphere
and the side of said member exposed to vacuum,
means operating when the motor is idling to open
said passage to said member whereby said clutch
is released, means operating upon the actuation
of, said acceleration control mechanism to actuate
said main ‘valve to close said passage from the
intake system and open said passage to the at-,
mosphere whereby said clutch is moved toward
engaged position, an'auxiliary passage from said
opposite side of said member to said auixilary
valve, said auxiliary passage forming an outlet for
the gas compressed by said member as the clutch
moves toward engagement, said auxiliary valve
being operable to close communication between
the atmosphere and the side of said member ex
posed to vacuum,‘ and restrict said auxiliary pas
sage upon a predetermined drop in pressure inci
dent to the initial engagement of said clutch, and
means controlled by said acceleration control
mechanism to provide auxiliary vacuum and air
inlet connection to the side of said member ex
posed to vacuum, said vacuum connection de
- creasing in capacity and said air inlet increasing
in capacity as said acceleration control mecha
nism is actuated to accelerate said motor.
'
11. In an automatic control means for a motor
vehicle, having a motor and an intake system, a
clutch having means normally holding it in. en
the side of said member exposed to vacuum, means
operating when the motor is idling to open said
passage to said member whereby said clutch is re
leased, means operating upon the actuation of
said acceleration control mechanism to actuate
said main valve to close said passage from the in-V
take system and open said passage to the atmos
phere whereby said clutch is moved toward en
gaged position, an auxiliary passage from said op
posite side of said member to said auxiliary valve, 10
said auxiliary passage forming an outlet for the
gas compressed by said member as the clutch
moves toward engagement, said auxiliary valve
being operable to close communication between
the atmosphere and the side of said member ex
15
posed to vacuum, and restrict‘ said auxiliary pas
sage upon a predetermined drop in pressure in
cident to the initial engagement of said clutch,
means adjusting said auxiliary valve‘ to operate at
various pressures, and means operating to further 20
modify the pressure on said member whereby
clutch engagement is completed».
‘
12. In an automatic control means for a motor
vehicle, having a motor and an intake system, a
carburetor riser with a throttle valve therein, a‘
clutch having means normally holding it in en
gaged position, a mechanism for controlling the
acceleration of the motor, means providing a pas
sage'connected to the intake system of the motor,
a one-way check valve, a member for releasing 30
said clutch responsive to vacuum in said passage
on the forward face and responsive to atmospheric
pressure thru said one waycheck valve on the op
posite face, a main valve in said passage operable
to control communication between said passage
and the intake system and between said‘ passage
and the'atmosphere, ‘an auxiliary valve operable
to control communication between said passage
and theatmo‘sphere, and between said opposite
side of saidmember and the atmosphere, 9. port
in said'carburetor riser exposed to vacu
in'said
intake system when said throttle valve is closed,
resilient means operating to close said main valve,
means transferring vacuum from said port allow-i; ~
ing atmospheric pressure to open said valve, re
silient means operating to, close said auxiliary
'valve, means allowing vacuum to open said auml
iary valve, means allowing vacuum to release said
clutch, means operating upon the actuation of
said throttle valve to reduce the vacum acting on
said main valve whereby said'main valve closes
said‘passage fromthe intake system, and opens
said passage to the atmosphere thru said auxil
iary valve whereby said clutch is moved toward
engaged position, an auxiliary passage from said
opposite face of said member to said auxiliary
valve, said auxiliary passage’transferring pres
sure created at'said opposite face of said member
by said means normally holding said clutohin en
gaged position to said auxiliary valve holdii g said
valve open to complete a passage from said op
posite face of said member to the atmosphere,
means operating at a predetermined drop in pres
gaged position, a mechanism for controlling the sure at said opposite face of said member inci
acceleration of the motor, means providing a pas . dent to the initial engagement of said clutch to 65
sage connected to the intake system of the motor, close said auxiliary valve whereby atmosphere is- _
- a one-way check valve, a member for releasing
said clutch responsive to vacuum_1_n_ said passage
on one face and responsive to atmospheric pres
70 sure thru said one way check valve on its opposite
_ face, a main valve in said passage operable to con-'
trol communication between said‘ passage and the
intake system and between said passage and the
atmosphere, an auxiliary valve operable to con
-75 trol communication between the atmosphere and
closed from said face of said member‘ exposed ' '
to vacuum, and said auxiliary passage is restricted.
and a connection from a port in said carburetor
riser to the face of said member exposed to, vacu 70
um, said connection further decreasing the vacu
um acting on said member, as said throttle valve
is opened.
'13. In an automatic control means for an auto
motive vehiole,_ having a motor and an intake 75
.7;
~ 2,107,724
system, a clutch having meansf'nor'mally hold
sure created at said opposite face of said member
by said means normally holding said clutch in
ing it. in engaged position, a mechanism for con
trolling the acceleration of the motor, means
engaged position, to said auxiliary valve holding
providing a passage connected to the. intake sys
said valve open tocomplete a passage from said
tem of the motor, a one-way check valve, a
opposite face of said member to the atmosphere,
means operating at a predetermined drop in pres
sure at said opposite face of said member inci
dent to the initial engagement of said clutch
member for releasing‘said clutch responsive to
vacuum in said passage on one face and respon
sive to atmospheric pressure thru said one way
check valve on its opposite face, a main valve,
10 in said passage operable to control communica~
, tion between saidvpassage and the intake system
to close said auxiliary valve whereby atmosphere
is closed from said face of said member exposed 10
to vacuum and said auxiliary passage is re
stricted, and a connection from said port in said
and between said passage and‘ the atmosphere,
an ‘auxiliary valve operable to control communi
carburetor riser to the face-of said member ex
cation between the atmosphere and the side ofv posed to vacuum, said connection further de
15 said member exposed to vacuum, means operat
creasing the vacuum acting on said member as 15
ing when the motor is idling to open said passage said throttle valve is opened, and means operative
to saidmember whereby said clutch is released, on the actuation of said throttle valve‘ to control
‘means operating upon the actuation‘ of said ac
the vacuum acting in said connection at the time
celeration , control mechanism to actuate said
said main valve opens to release said clutch.
main valve-to-close said passage from the intake
15. In a system of the class described, a clutch 20
7 system and open said passage to the atmosphere
having parts movable into and out of clutching
whereby said clutch is moved toward engaged engagement with each other, means normally
position, an auxiliary passage from said oppo--'" holding said clutch parts in engagement with
‘ site side. of said member to said auxiliary valve, each' other, pressure responsive means for mov
said auxiliary passage forming an outlet for the ing said clutch parts out of engagementwith 25
gas'compressed by said member as ‘the clutch each other, means for supplying vacuum to said
moves‘ toward engagement, said auxiliary valve.
pressure responsive means to cause the same
being operable to close communication between
to move said clutch parts to disengaged posi
tion, means for. releasing the vacuum acting on
said pressure means whereby said e?rst men 30
tioned means moves said clutch? parts toward
clutching engagement with each‘ other, means
responsive to the pressure induced by the force
of said means moving said clutch parts toward
engagement whereby-the movement of gas com 35
the atmosphere and the side of said member ex
posed to vacuum, and restrict said auxiliary pas
‘ sage upon a predetermined drop in pressure in
cident to the initial engagement of said clutch,
means adjusting said auxiliary valve to operate
at various pressures, means operating to further
modify the pressure on said member whereby
clutch engagementis completed, and means op
erative by vacuum in said intake system at a
pressed by said pressure responsive means is re
stricted at the initial engagement of said clutch
point where vacuum is induced by the velocity of
'gas in said intake system to'further control the
capacity of said connection.
"parts.
-
'
16.- In a clutch control mechanism for an auto
motive vehicle, a double-ended pressure diner
.
14, In an automatic control means for a motor
vehicle, having a motor ‘and an intake system,
ential operated motor having two separate com‘
partments therein, valve means for controlling
a'carburetor riser with a throttle valve therein, the clutch disengaging and engaging operations
a clutch having means normally holding it in 7 of-said motor. comprising a three-way valve op
engaged position,'a mechanism for controlling
erable to control the gaseous pressure of: one
the acceleration of the motor, means providing
compartment of said motor, and further com
prising a pressure diiferential operated valve op
erable in accordance with the gaseous pressure
of the other compartment of said motor and in
part operative to control the gaseous pressure of 50
said other compartment.
~a passage connected to the intake system of
the motor, a one-way check valve, a member
for releasing said clutch responsive to vacuum
in said passage on-the forward face and respon
sive to atmospheric pressurethru said one way
check valvevon the opposite face, a main valve ’
1'7. In a clutch control mechanism for an auto
in saidpassage operable to control communica
motive vehicle provided with a clutch having
tion between said passage and the intake system driving and driven elements, and means for bias
and between said passage and the atmosphere, an ing. said elements into driving engagement one 55
auxiliary valve operable to control communica
with another, a double-ended pressure differen
tion between said passage and the atmosphere tial operated motor having end compartments
and’between said opposite side of said member ' therein, valve means for controlling the clutch
and the atmosphere, a port in said carburetor disengaging and engaging operations‘ of said
riser exposed to vacuum in said intakev system - motor comprising a three-way valve operable to 60
when said throttle valve- is closed, resilient means ‘ control the gaseous pressure of one compartment
' operating to close said auxiliary valve, :means ‘of said motor, and further comprising a pres
allowing vacuum 'to open ‘said auxiliary valve, sure differential operated valve, operable in ac
means allowing vacuum to release said clutch, cordance with the gaseous'pressure of the other
._mea_ns operating upon the actuation of said
compartment of said motor, for controlling the 65
throttle valve to reduce the vacuum acting on .,gaseous pressure of said other compartment of
said mainvalve whereby said main valve closes‘
,said passage from the intake system andv opens
said passage to the atmosphere through said aux
'ili'ary valve whereby said clutch is moved toward
engaged position, an auxiliary. passage from said
. , opposite face-of said member‘ to said auxiliary
valve. said auxiliary passage transferring pres?
the motor, said latter valve being automatically
operative, when the clutch plates contact during
the engagement of the clutch, to substantially 70
modify the clutch engaging operation of said
-
motor.
RALPH is. wm'rrmo'ron. '
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