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Патент USA US2404623

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July 23, 1946.
A_ Y, DQDGE
7
2,404,623
TORQUE TRANSMITTING MECHANISM
Filed Feb. 14, 1944
3 Sheets-Sheet l
July 23, 1946.
A_ Y_ DODGE
' 2,404,623
TORQUE TRANSMITTING MECHANISM
Filed Feb. 14, 1944 '
é Sheets-Sheet 2
July 23, 1946.
'
A, Y_ DODGE
12,404,623
TORQUE TRANSMITTING MECHANISM
Filed Feb. 14, 1944
s Sheéts-Sheet s
Patented July'23, 1946‘
. 412,404,623
: UNITED STATES PATENT‘ OFFICE - 2,404,623
TORQUE TRANSMITTING MECHANI-SM'
. .
Adiel Y. Dodge, Rockford, 111.
Application February 14, 1944, Serial,No._522,222 I
13Glaims.
1
~
(Cl. 74-293)
.
2
This invention relates to a torque transmitting
mechanism and more particularly to ?uid and
thereof, extends "into the housing and is con
mechanical transmissions for transmitting torque
nected to a. ?y wheel l2. The ?y wheelis adapted
' between driving and driven shafts.
One of the objects of the invention is to pro- .
including a ring gear [3 meshing with planet
to drive one element of a ‘planetary gear unit
pinions I 4 which in turn mesh with a sun gear l5.
vide a torque transmitting mechanism employing
The planet pinions are supported between side
a planetary gear set functioning both as a gear
reduction unit and as a ?uid clutch in which the
gears of the gear set are relatively movable for
plates l 6 and I‘! forming a gear carrier and which
?t tightly against the sides of the' teeth on the
self-alignment. According to one feature of the 10 sun gear, planet pinions'and ring gear. , The ends
of the teeth ?t against blocking members so that
invention, the ring gear of the planetary set may
the unit forms a gear pump having av series of
be supported for axial ?oating movement to align
inlet ports IS in the side plate l6 and outlet'ports
itself with the planetating gears. According to
IS in the side plates ll opening into the space '
another feature yielding seals may be provided
around the unit. .
to seal the sides of the ‘gear teeth against the 15
escape of ?uid.
.
7
Another object of the invention is to provide
a torque transmitting mechanism in which a
The unit is‘ mounted» between. the ?ange of '
the ?y wheel l2 and a cover plate 2| which seals
against a sleeve 22 on which the sun gear is
mounted. 'F'luid is supplied to the unit through
a tubular driven shaft 23 connected to the side
a reverse ‘gear.
I
"
20 plates and formed'withean inlet port 24v com
Still another object of- the invention is to pro
municating with the'inIet passage Hi. The shaft
vide a torque transmitting mechanism in which
23 is also formed with an exhaust port 25 com
torque ratio changes are e?‘ected under load,
~municating with the
I space around the gear set.
automatically without torque interruption in re
planetary gear set acts both as a clutch and as
sponse to vehicle speedand torque requirements.
Preferably a manual control is provided to over
rule the automatic control when desired.
A further object of the invention is to provide
a torque transmitting mechanism in which torque
?ow is interrupted under minimum power con
ditions except when the speed is above a pre
determined value.
'
The above and other objects and advantages
will be more readily apparent from the following
description when read in connection with the ac
companying drawings, in which—
‘I
.
Figure l is a side elevation with parts in sec
tion of a transmission embodying the invention;
The ports 24 and 25 are controlled by a sleeve
valve 26 formed with a pair of inlet ports 21
to register with the inlet port 24 and with an
exhaust port 28 to register with the port 25.
In order that the ring gear l3 may align itself
with the planet gears and sun gear,~it is mounted
for axially ?oating movement relative to the ?y
wheel and the cover plate 2|. For this purpose.
the cover plate is connected to the ?y wheel by
studs 29 which slidablyvengage and support the
ring gear. With this construction the ring gear
may move axially and is held in alignment with
the planet gears by the side plates I 6 and I1,
without undue side thrust.
‘
_
In order that the unit may function to trans
Figure 2 is a partial enlarged section on the ‘
torque at an increased ratio, the sun gear is
line 2--2 of Figure 1;
40 mit
adapted to be held against reverse rotation by a
Figure 3 is an enlarged section illustrating the
one-way brake 3| interposed between a sleeve 22
details of a control valve;
and a. ?xed part of the housing.
a
Figure 4 is a partial enlarged section on the.
The planetary gear set as described above is
line 4-4 of Figure 2; and
Figure 5 is a diagrammatic view showing the 45 adapted to drive a second similar planetary gear
set including a sun gear 32 mounted on the shaft
control system.
>
I
23 and meshing with planet pinions 33 which in
The transmission as shown in Figures 1 and 2
turn mesh with a ring gear \34. The planet pin
is substantially similar to that more particularly
described in my co-pending application, Serial
ions are‘carried between plates 35 and _36 which
seal against the sides of the gear teeth and which
No. 494,291 ?led'July 12, 1943, Patent #2371229. 50 are‘formed
with inlet passages 31 communicat
The transmission as shown, comprises a; station
ing with an inlet port v38 in the shaft 23 and with
ary housing In which may be mounted in place
exhaust ports 39 communicating with an exhaust
of the usual transmission casing in an automo- 1
passage 4| in a tubular shaft 42. The sleeve valve
bile or the like. A driving shaft I l ‘which may
be the engine crank shaft or a’ suitable extension 55 26 is formed with an inlet port 43 adapted to reg
ister with the inlet port 38 and with an elongated
2,404,628
3 .
V exhaust 'pdrt 44 adapted to register with the port
4|. ‘The valve 28 may be controlled by a collar 48
. manually or automatically'by the control mech
anism illustrated diagrammatically in Figure 5.
As shown in this ?gure, a cylinder 18 is mounted
connected thereto by a pin 48 extending through
adjacent the transmission andslidably carries a
piston whose piston rod ‘I4 is connected to the
a slot in theshaft 42. The shaft 42 as shown, is
connected to the planet carrier formed by plates
brake control lever ‘I2 and to a shifting lever ‘II
pivoted at 18 and connected at its opposite. end
The ring gear 84 is connected to a pair of plates
to the shift collar 88 forthe valve ‘88. A similar’
formed
in
register
with
the
‘ ,41 and 48 which are
cylinder. 11 is provided having its piston rod ‘I8
ring gear with sets of clutch teeth 48. The ring
connected to one end of a shift lever 18 which
10
gear is formed on its opposite ends with similar
is pivoted at-8I and has its opposite end con
clutch teeth adapted to engage the teeth 48 and
nected‘ to the shift collar 48 for" the valve 28.
having sum‘cient clearance that the ring gear may
The cylinder 18 is provided with three valves
?oat axially to align itself with the planet pinions
82, 83 and 84 which may connect the cylinder at
and sun gear. ‘The plates Y41 and 48 and the ring
spaced points along its length to a source of
gear are held against reverse rotation by a one-4 16 power such as the intake manifold of an internal
'way brake 5| acting between a tubular hub on
combustion engine. When any one of the valves
one of the plates and a ?xed part of the housing.
is open the piston in the cylinder will be moved
The second planetary gear set is adapted to
‘to a position in which‘ it closes the port for that
drive through a third planetary gear set including
valve and will remain in that position until one
a sun gear 52 mounted on the shaft 42 and mesh 20 of the other valves is open. The cylinder 11 is
ing with planet pinions 58 which in turn mesh
provided with four similarly operating valves 88.
with a ring gear 54. The planet pinions‘ are car-_
88, 81 and 88 so that its piston may be moved to
ried between plates 55 and 58 which fit tightly
any one of four different positions.
against the sides of the planet pinions and sun
Each of the valves 82 to 88 maybe constructed
gear and which are relieved opposite the ring gear
as shown in Figure 3.. This ?gure illustrates by.
teeth. In order to seal the ring gear teeth against
way of examplethe valve 85, but it will be under
leakage of ?uid past their sides while permitting
stood that each of the other valves is-identical in
axial movement between the ring gear and planet
construction. 'As shown in Figure 3, the cylinder
pinions yieldingly sealing means are provided to
TI is connected through‘ axially spaced ports 88
engage the ring gear teeth. As best seen in Fig 30 and 8| with spaced points in a valve compart
ures 2 and 4 such means comprise buttons 51 car
ment 82 in the valve body. A valve 83 is slidably
ried by the side plates and urged against the ring
mounted in the bore and is urged downward
gear teeth by springs 58. The buttons are located
therein by a coil spring 84. The ends of the bore
at the points where the planet pinions mesh with
82 are connected to an atmospheric port 85 and
the ring gear and seal the sides of the ring gear 35 its central portion is connected to a source of
teeth against ?uid leakage solthat an e?ective
vacuum through a passage 88.. The passage 88
88 and 88.
_
.' '
is controlledby 'a slide valve 81 normally closed
The side plate 58 is formed with inlet passages
by a spring 88 and adapted to be opened by a
58 as'best seen in Figure 2 which communicate
solenoid 88.‘
'
with the gear teethiadlacent the points where the 40 The valve 83 is connected to a rod |8| project
planet pinions‘ mesh with the sun and ring gears
ing through the valve body and adapted to be
respectively. The spaces between the gears are
engaged by the ‘pointed end of_;an operating rod‘ '
closed ‘by block members 8| which» fit tightly
I82. The rod I82 as best seen in Figure 5 is con
against the ends of the teeth on the several gears 45 nected to a bracket I83 on the piston rod 18 to
pump unitmay be formed.
so that an e?’ective pump unit is formed. It will
be moved by the piston.
be noted that each planet pinion has two inlet
'
'»
'The solenoids 88.0f the valves 85to 88' are con
"ports at diametrically opposite. points thereon
‘ trolled by a switch mechanism I84 having a series
and it will be understoodthat exhaust ports are
provided in the opposite side'plate 55 at diamet
so
- rically opposite points with respect to the planet
pinions and out of register with the inlet ports.v
of contacts thereon adapted. to be selectively en
gaged by a wiper I85. The contacts are con
nected respectively to the solenoids 88 of. the ,,
valves so that the position of the wiper I85 deter-'v
The inlet passage is provided with an inwardly
opening check valve 82 communicating with an‘
inlet passage 83 extending through the shaft 42.
mines which of the solenoids will be energized.
.
when‘ the solenoid of one of the va'lvesis ener-'
gized and unless the operating rod;| 82 is in the
55
The space around the gearv set is ' connected
position shown in Figure 8 with respect to such’
through an'exhaust passage 84 with the interior
valve‘, vacuum will be admitted‘ to the port 8|
7 of the shaft 42. Preferably a-second exhaust‘pas
‘ causing the piston in the cylinder "to move
, sage 85 is provided opening into a hollow space
toward'the predetermined point. ‘The ducts
in the sun gear 52 whichcommunicates with the “
and 8| communicate with the right and left end
as "
inlet passage.
of cylinder 11. -_When “the piston 'reaches the I
The passages 83, 8'4 and 85 .are controlled by > desired position, the operation rod I82 will en- '
in
the
shaft
42
and
in
a
valve‘ sleeve 88 slidable
gage the valve stem IN and move the valve‘ 88 to
tubular output shaft .81 which is connected to the > ' if'its neutral position as shown inFigure 3. In this '
ring gear 54. The valve-88 may be controlled'by a
'position the valve closes bothports 88 and 8|".-.
shifting collar 88 connected to the valve-by a 05 If the piston should move‘ in either direction,
pin through a slot in the shaft 81.
'
_
I
however, one or'the other of the ports '88 and 8|
The third planetary gear set is adapted to form : will be opened to connect one side or the other
a reverse gear for the tr'ansmission'and for this
ofthe'piston to vacuum and return the piston
purpose‘ a friction brake 88'is provided engage
to the desired position. . In this way, the position
70
able with abrake drum ‘II which is connected to
of the piston in the cylinder 11 is accuratelyl '
the planet carrier. The‘ brake is adapted to be
determined when both ports 88 and 8| are closed. . -
,
'
.
y
-
"so
‘ controlled by a lever 12 and is normally disen
.
The valves 81 are adapted to. be controlled "
gaged being engaged ‘only when reverse drive is
automatically in response-‘to speed and torque‘
is adapted :to be‘v controlled
.16 and for this purpose the swltchumechanisml'l?
desired.
- -- _-
'
The ' transmission
v
_ 2,404,828
5
6
is provided with an ‘automatic contact I08 con
which-is responsive to temperature. When the
nected through-a wire I01 to each of a plurality
of switch5 contacts I08. The contacts I08 have
oil used in the control system is cold and more
viscous than normal the Sylphon I43 will relieve
contacts I09 paired therewith and the pairs are
the pressure on valve I21 to compensate for the -
‘adapted to be bridged by switch‘mem'bers III.
viscosity of the oil so that the transmission will be
When the switch members are in their upper
controlled'in the same manner regardless of tem
position to which they may be urged by springs
perature. After the mechanism is warmed up
or the like, each of the pairs of contacts I08 and .
the Sylphon will increase pressure on valve I21,.
I09 will be interconnected.
,
leaving the transmission more under control of
' Below the contacts I08 and I09 are-another 10 valve I28. Since the‘pump I2I is driven at a
series of contacts In and H3.‘ The ?rst contact
speed proportional to the speed of one of the
‘I I2, as. seen at the left in Figure 5 is connected
transmission elements the volume of liquid it de
‘to the wire I01 and each of the succeeding con
livers will be proportional to speed and the pres
tacts H2 is connected to the preceding contact
sure built up across the valve I28 will be greater
I09. vThe contacts I I3 are connected respectively 15 at high than at low speeds. Accordingly, the
to the wires leading to the valves 88, 81, and 86
pressure supplied to tlie cylinder II 1 will vary
and the last contact I09 is connected to the wire
with speed. The cam I39 may load the spring
leadingto the valve 85.
.
v
I32 variably depending upon the accelerator posi
tion so that the control is affected by both speed
depressed il'lLO engagement with the contacts H2 20 and accelerator position. Accelerator position
and H3 by‘ operating rods H4. The Operating
coupled with speed is approximately‘ equal to
rods are engaged by a cam rod H5 terminating
torque and the control is therefore both speed
v The switch 'members III are adapted- to ‘be
in a pointed cam end and‘connected to a piston
and torque responsive.
.
H6 in‘ a cylinder II1. ~A-compression spring II8
It is normally preferred to have the shifting
urges the piston II6 to the right out of engage 25. mechanism operate more rapidly at high speed
ment with all of the operating rods II4. Prefer
than at low speed and for this purpose a throttling
ably a spring detent H9 is provided engageable
valve I 44 may be provided connected to the ac-‘
with notchesin the ,rod II5 yieldingly to hold it '
in any one of its several. operating positions.
The piston H6 _is urged to the left automati 30
cally to control the transmission in response to
both speed and torque by a mechanism similar ,
to that more particularly described and claimed
in my copending application, Serial No. 416,319,
celerator pedal I 4i and controlling flow through -
a vacuumiine I45.
The line I45 may supply
vacuum to both cylinders 13 and 11 so that when‘
the accelerator pedal is depressed, thevalve I44
will be openedfurther to reduce the restriction
in line I45 to provide a more rapid movement of
the pistons in these cylinders.
,
'
?led/on October 24, . 1941,‘ Patent #2,372,817. 35
The valves 82, 83, 84 of the cylinder 13 may be
This‘ mechanism as shown, comprises a pump I2I ~ 7 controlled manually through-a selector valve ‘I48
which may be a gear pump and which is driven
having a large segment I41 and a pair of buttons
’ by one of the elements of the transmission mech
I48 and I49 thereon adapted to be engaged by
a wiper I5I. Preferably the wipers I5I and I05
sucks liquid such as oil from a supply tank I22 40 are interconnected by an insulated coupling I04a
and forces it through a pipe I23 connected to
for simultaneous movement. The segment I41 is
the right end of a cylinder II1._ A return conduit .
connected to the valve 84 to shift the piston rod
I24 is preferably connectedto the left end ‘of the
14 to. a position for forward drive while the but
cylinderto return any ?uid ‘leaking past'the pis
' tons I48 and I49 are connected to valves 83 and
ton to the tank I22. Pressure in the pipe I23
82 respectively to shift the transmission to a’
is limited by a safety relief valve I25 and by an
. position for neutral and reverse drive.
automatic control valve indicated generally at
'For shifting the transmission to neutral the
anism, preferably‘ the driven‘ shaft. The pump
I26.
-
~
"
wiper I5I is moved into engagement with the con
tact button I48 to energize the valve 83 and move
having a pair of pressure relief valves I21 and 50 the piston rod 14 to its neutral position. At this
I28 therein connected in parallel to the pipe I23
time, the wiper I05 is in engagement with one of
for controlling communication between this pipe
the dummy buttons on the switch I04 and none
and a return conduit I29 leading back to the
of the valves 85 to 88 can be opened. Under
supply tank..- The valve I28 is the main control
these conditions the valve 28 is shifted to the ex;
valve and is urged against its seat by springs I3I - treme ‘right to open the exhaust ports 25 and M
and I32.v The spring I3I seats on a cam I33 which
and close'the intake ports 24 and 38. The valve
is connectedthrough' a link I34 to a manual selec-_
66 is shifted to its central position to close the
tor I35 through which the cam maybe adjusted.
intake port 63 and open the ports 64 and 65.
By turning the selector handle I35 the tension of
The brake 69 is disengaged so that the third gear
the spring |3I may be adjusted to vary the point
unit is free to turn in either direction without
The control. valve I26 includes a valve body
at which the valve I 23 will open.
.
The spring I32 seats against a similar cam I36
connected through a link I31 to a cam follower.
arm I38 engaging a cam I39 which is connected
to the accelerator pedal I4I. The'cam I39 may
be of substantially uniform descent throughout
most of its operating surface as shown and may
terminate in an abrupt shoulder I42.‘ When the
accelerator pedal ‘is fully depressed the cam fol
lower will fall over the shoulder to release the
_ pressureon’the. spring I 32, thereby causing the
transmission to shift into a higher torque ratio
or lower speed ratio. This feature is advanta
geouswhen it is desired toaccelerate rapidly.
The valve I21 is controlled by a Sylphon I43
transmitting any torque. It will be noted that
1 when the vehicle is moved forward, liquid may be
drawn in the port 65 to the inlet passage and
forced out the port 64 while if the vehicle is‘
moved rearwardly, the reverse flow will occur.
However, no substantial torque canbe transmitted
since the liquid will be pumped freely through
the unit.
.
.
In order’to eliminate creep under these condi
tions. the driven shaft 61 may carry a brake drum
I52 adapted to be engaged by a brake band I53 to
hold. the driven shaft stationary. The brake
band I53 may be controlled by a side-ways move
ment of the accelerator pedal I4I as more par
ticularly disclosed in my Patent No. 2,309,051.
a
gear sets so that this position provides a ‘different
This brake arrangement may provide a highly
degree of torque multiplication than the second
satisfactory no-back, by constructing the brake
band I53 so that it has a substantial wrapping
action in reverse and a relatively lighter braking
effect in forward drive. When the accelerator
For direct drive the wiper I05 is movedv to the
position shown in Figure 5 to open the valve 88
pedal is returned to its central position and de
pressed to start the car in motion, the brake
I53 will be released. For reverse drive, the wipers
Figure 1. In this position, both inlet ports‘ 24~and
position describedr,
"
~
'
and shift the valve 28 to the position shown in
38 are ,open and both exhaust ports 25 and“ are
closed so that all three of the gear sets_function
with the contact button I49, the wiper I05 at 10 as clugches to transmit torquesdi‘rect ‘from the
driving shaft to the driven shaft.
.
' .
this time engaging the second dummy button on
For automatic forward operation, the wiper I05
the switch I04. The button I49 is connected to
is moved into engagement with the contact 'but
the valve 82 to energize it and move the piston
I5I and I05 are turned to engage the wiper I5I
rod ‘I4 to its extreme left position. This opera
> tlon moves the brake operating lever 12 counter
ton I00 to connect the wire I0‘I in the circuit. '
15 With the piston H8 at the extreme right, all of
the plungers II4 will be raised and a ‘circuit will
beenergized from the righthand contact I00 to
the righthand contact I00 to open the valve ‘85.
clockwise to engage the brake 09 and shifts the
valve 68 to its extreme righthandposition. In
this position, the ports 64 and 65 remain open and
Upon an increase in pressure in the cylinder’ I H
the planet carrier formed by the plates 55 and 50
is held stationary. Torque is transmitted from' 20 in response to increased speed or decreased torque
conditions or both, the pistonill?mwill be moved
the driving shaft through the ?rsttwo planetary
. gear sets which transmit the torque'at-areduced
to the left to cam the righthand-plunger I I4 down‘
speed in the forward direction. Thus the shaft
1 and close the righthand-switch member-I I I across
the contacts H2 and I I3. At this timeza circuit
42 is‘driven forward to drive the sun gear 52 for
ward and since the planet carrier of the third 25 will be established to the valve 86 from the‘mid- ‘
- dle contact I08 to the middle contact_l09 which
gear set is held stationary, the direction of 'drive'
is reversed to drive the ring gear 54 and the driven - is connected to the righthand contact II2-;‘~~The shaft 61 backward.
righthand switchv'member- I I I connects this last
_
contact to the righthand contaptkiu-ewhich is‘
For forward drive at low speed, the wipers I5I
and I05 may be moved to engage the wiper I5I 30 connected to the valve 85. Further movementiof‘ '
the piston IIB to the rightwill. s'ucce'ssivelymove
- withLsegment I41 and the wiper I05 with the ?rst
down the remaining plungers I I4‘t6‘e'nergize the
of the buttons connected to the valves 85 to 88.
valves 81 and 88 and shift the transmission to its 7
The circuit from the segment I4'I opens the valve
third and ‘fourth positions described above.
84 moving the piston rod 14 to its extreme right
It will be understood that during all forward ~>
hand position. This operation disengages the 35
operations the wiper I5I remains in contact with ,
' brake B9 and shifts the valve 66 to its extreme left
position as shown in Figure 1 in which the inlet
port 63 is open and the ports 64 and 65 are closed.
Under these conditions, ?uid is admitted to the
gear unit but the exhaust is shut o? so that the 40
‘the segment I41 to shift the valve 6l6eto its for
ward .position. The circuit through the valves 82 '
to 88 include a wire- I55 which is connected to. _
the wiper I05, and to a source of current suchlas
gear unit is locked to function as a clutch. The
a battery I56. The wiper I05 is-connected to-the '
wiper I05 energizes the valve 85 to open it and
shift the piston rod ‘l8 to its extreme left position
moving the valve 26 to its extreme right position
in which inlet ports 38 and 24 are closed andex
battery through a switchcontrolled by the ac
celerator pedal. As shown, the switch includes
an elongated segment I51 connected to
wire
haust ports 4I and 25‘ are open. Under these ,
conditions the ?rst two gear sets function as re
to the battery and moved by the accelerator pedal. _
Throughout the normal 'operating range the.
duction gears to increase the torque of the driving
shaft and transmit it directly through the third
gear set to the driven shaft.
\
Second speed forward is provided by moving
the wiper I05 to the second button to open the
valve 86 and shift the piston rod 18 to the right
I55 engaged by an'arm I58 which is connected
wiper I58 remains in contact with the: segment
I51 to complete the circuits as described.
50
When the accelerator pedal is released to'close I
the ‘engine throttle and reduce the engine to a_
condition of minimum torque, the wiper I58 will '
leave the segment I51 and engage a contact I59
connected to the neutral valve 83. Thus when
to move the valve .26 to its second position. In
this position, the inlet port 30 is closed and out 55 the accelerator pedal is released; the valve 83 will
let port M is open so that the second gear set con
be opened to shift the transmission to neutral. 7’
tinues to operate as a reduction gear. The inlet
In order to make this control/ineffective at
port 24 of the first gear set is open and its ex
high speeds when engine braking is desirable, a
haust port 25 is closed so that this gear set func
switch I6I is connected between the contact I59
tions as a. clutch to transmit torque directly from
the driving shaft to the shaft 23. Under these
conditions only'the second gear set operates to
increase the torque and the speed of the driven
shaft will be higher than in the ?rst position de
so and the valve 83 controlled by a governor I62
which is responsive to the speed of one of, the -
shafts, preferably the driven shaft.
When the "
driven shaft is operating above a predetermined
speed the switch I6I will be opened .to prevent
65 shifting of the transmission into neutral so that
engine braking may be utilized at high speeds.
For third speed forward, the wiper I05 is moved
As previously stated, the third gear set having
to energize the valve 81 shifting the piston rod 18
ring gear 54, acts as the master clutch‘ for all
further to the rightand'the valve 26 to its third
forward clutching operations. The band brake‘
position. At this time, the/inlet port 38 is open
69 performs the functions of a brake ionreverse
and the exhaust port 4| is closed so that the‘ sec
‘ movement in cooperation with this gear set.
ond gear set operates as‘ a clutch. The’ inlet port
These'two operations are controlled by the
24 is closed and the exhaust port 25 is open so
accelerator pedal, by means of an electric circuit
that the ?rst gear set operates as a reduction gear.
and a cylinder'as previously described. The ac
It will be noted that the sun is the reaction mem
ber in the .?r'st- and the ring gear in the second 75 celerator pedal preferably has lost motion at both
scribed»;
..
,
,
9,404,628
the top and bottom of its travel. By depressing
the accelerator pedal thru the lost motion at the
top oi’ its stroke wiper Ill is caused to leave
contact I" and engage contact I". This pedal
movement also simultaneously opens the accel
erator a small predetermined amount. The con
tact Just made causes piston to move and engage
10
ing members and the ring gear drivably to con
nect them while permitting the ring gear to move
axially, and torque transmitting connections to
the sun gear, the gear carrier and the supporting
members.
'
3. In a torque transmitting mechanism, a
torque transmitting unit comprising a planetary
one of the clutch functioning members, depending
di?erential
gear set including a sun gear, l series
on the position of the circuit controlsv previously
planet pinions meshing with the sun gear, and .
described. Ii’ the pedal is depressed gradually 10 oi’
a ring gear meshing with the planet ‘pinions, a
the vacuum throttle valve I“ will open slowly
gear carrier carrying the planet pinions includ
thereby controlling the rate of clutch engagement
ing side plates overlying the ends or the teeth
as well as the rate of increasing engine power. v
on the sun and ring gears, means between the
By these means the clutch is caused to engage,
slowly or quickly, after the pre-selections are 15 plates engaging the ends or the gear teeth
whereby the gear set forms a ?uid pump, means
made by operating contacts Ill-I48 or I49 as
forming inlet and outlet ports for the pump,
more fully described previously.
valve means controlling the inlet and outlet ports,
As the pedal I“ is depressed the cam I39 de
the side plates being relieved opposite the ring
creases the tension on spring I32 in the ?uid con
trol valve, thus decreasing ?uid pressure on piston 20 gear teeth whereby the ring gear and planet
pinions can move axially relative to each other,
I It for a given car speed. A depressed accelerator
pedal thereby maintains a lower speed ratio for ‘ yielding sealing means carried by the side plates
a given intermediate car speed. By depressing
the pedal beyond i’ull open throttle‘position the
tension on spring I32 is further decreased thus
further reducing the fluid pressure on piston H6
and causing a shift to a lower speed ratio at car‘ _
speed below some predetermined high car speed‘.
Referring to Figure 1, check valve 62 is pro
vided to prevent free wheeling when in the for
ward driving position. Valves and/or one way
clutches may be used in connection with the ?rst
and second gear sets; not shown herein, but. ‘
shown and described fully in my copending ap
plication No. 494,291 ?ied July 12, 1943, Patent
#2,371,229, to prevent free wheeling.
While one embodiment oi’ the invention has
been shown and described in detail herein, it will
be understood that this is illustrative only and
and sealingly engaging the sides or thering gear
teeth, and torque transmitting connections to the
sun gear, gear carrier and ring gear.
4. In a torque transmitting mechanism, a
torque transmitting unit comprising a planetary
differential gear set including a sun gear, a series
01' planet pinions meshing with the sun gear, and
a ring gear meshing with the planet pinions, a
gear carrier carrying the planet pinions includ-,
ing side plates overlying the ends of the teeth
on the sun and ring gears, means between the
plates engaging the ends or the gear teeth
whereby the gear set forms a ?uid'pump, means
iorming inlet and outlet ports for the pump,
valve means controlling the inlet and outlet
ports, the side plates being relieved opposite the
ring gear teeth whereby the ring gear and planet
is not intended as a de?nition of the scope of 40 pinions can move axially relative to each other.
sealing buttons or relatively small diameter car
the invention, reference being had for that pur
ried by the side plates and yieldingly pressing
pose to the appended claims.
against the sides or the ring gear teeth, and
What is claimed is:
,
torque transmitting connections to the sun gear,
1. In a torque transmitting mechanism, a
torque transmitting unit comprising a planetary 45 the gear carrier and the ring gear.
di?erential gear set including a sun gear, a series
of planet pinions meshing with the sun gear, and
a ring gear meshing with the planet pinions, a
5. A torque transmitting mechanism compris- '
ing a plurality of planetary gear sets, means en
closing the gears of said gear sets and providing
inlet and outlet ports therefor whereby they form
gear carrier carrying the planet pinions including
side plates overlying the ends or the teeth on 50 ?uid pumps, shiftable valvemeans controlling
the inlet and outlet of ?uid to the gear sets,
the sun and ring gears, means between the plates
a
brake engageable with an element of one or
engaging the ends of the gear teeth whereby the
gear set forms a ?uid pump, means forming inlet
and outlet ports for the pump, ‘valve means con
, the gear sets to reverse the drive therethrough,
power means to operate the brake and to shift
trolling the inlet and outlet ports, a supporting 55 the valve means, and means responsive to the
speed of the driving member of the mechanism
member adjacent the gear set, elongated pins car
to control the power means which operates the
ried by the supporting member and slidably con
valve means.
nectedto the ring gear whereby it can align itself
6.- A torque transmitting mechanism compris
with the gear carrier, and torque transmitting
ing
a plurality of planetary gear sets, means
connections to the sun gear, the gear carrier and 60 enclosing the gears 01' said gear sets and pro
the supporting means.
viding inlet and outlet ports therefor whereby
2. In a torque transmitting mechanism, a
they form ?uid pumps, shiftable valve means
torque transmitting unit comprising a planetary
controlling the inlet and outlet or ?uid to the
differential gear set including a sunv gear, a series ‘
gear sets, a pump driven by one element of the
of planet pinions meshing with the sun gear, 65 mechanism
to create a ?uid pressure proportional
and a ring gear meshing with the planet pinions,
to the speed-of the mechanism, and means re
a gearv carrier carrying the planet pinions in
sponsive to said ?uid pressure to control shift
cluding side ‘plates overlying the ends of the teeth
ing of the valve means.
'
on the sun and ring gears, means between the
7. A torque transmitting mechanism compris
plates engaging the ends of the gear teeth where 70 ing a plurality of planetary gear sets, means en~
by the gear set forms a ?uid pump, means form
closing the gears of said gear sets and provid
ing inlet and outlet ports for the pump, valve
ing inlet and outlet ports therefor whereby they
means controlling the inlet and outlet ports, sup
form ?uid pumps, shiftable valve means control
porting members on opposite sides of thelgear
ling the inlet and outlet or ?uid to the gear sets,
set, axially slidable clutch teeth on the support 75 a vpump driven by one element of the mech
2,404,893
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a
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'
the valves.
.
\s"
'
.
11. In 7 a torque tr
tting mechanism, a
torque transmitting unit comprising a planetary
gear set, means enclosing the gears of the gear
power means to any one of a plurality-of posi
'
'
source of power, and electrical means in control
anism to create a ?uid pressure proportional to
the speed-of the mechanism,.power means to
shift the valve means, and means responsive to
said ?uid pressure to control shifting of the
tions.
l2
set and providing inlet and exhaust. ports there
- for-whereby it forms a ?uid pump, avalve con
'
8. A torque transmitting mechanism compris
trolling the ports, means to shift the valve to one
- ing a plurality of planetary gear sets, means en
position in which the inlet port ‘is closed and
the exhaust portopen ‘and to a second position in
which the inlet port is open and the exhaust port ,
closing the gears of said gear sets and providing
inlet and outlet ports therefor whereby they form
?uid pumps, shiftable valve means controlling the
inlet and outlet of ?uid to the gear sets, a pump
closed, a control member for controlling the power '
supplied to ‘the mechanism,v and means operated
by, the control member when it is inya minimum
driven by one element. of the mechanism to
create a ‘?uid pressure proportional‘ to the speed
of the mechanism, a cylinder, a piston in the 15 power supply position to operate the valve shift- '
ing means to vshift the valve to said one position.
cylinder connected to the'valve means to move;
12. In a torque transmitting mechanism, a
it, a series of valves connected to the cylinder
' ~ at axially spaced points to control connection -
of the cylinder to a source of power, and means
, torque transmitting unit comprising a planetaryv
,‘ gear set, means enclosing the gears of the gear
and providing inlet ‘and exhaust ports therefor
responsive to} said ?uid pressure to control said‘ '20 ’ set
whereby it forms a ?uid pump, a valve controlling
valves.
1
,
t.
9. A torque tr
tting mechanism compris
ing- a plurality'_ of planetary gear sets, means
enclosing the gears ofsaid gear-sets and pro
' the ports, means to shift the valve to one position
in which the inlet port is closed and the exhaust, '
‘port {open and to‘ a second position in which the
, ,
viding inlet and outlet ports’ therefor ‘whereby 25 inlet port is open and- the exhaust'port closed, a‘
"control member for controlling the ' power Isup-'
they form ?uid pumps, shiftable valve means
controlling the inlet and ‘outlet of ?uid to: the ,7
gear sets, a brake engageable ‘with one element -
of one of the gear sets to reverse thedrive there- _ a
I"
'
I
plied to the mechanism, means operated by'the. ‘
control member when it is. in a minimum power.
supply vposition to operate the’ "valve shifting
‘through, power means to operate the brake-and 30 means to v‘shift the valve to said one position, and
shift the valve means, manual control means to
_ means responsive to‘the speed of 'one element of
the mechanism to make the last named means
simultaneously control the power means to pro
inoperative when the speed is above a predeter
vide neutral or reverse or forward drive, and
means responsive to the speed vof one member of
I ‘ the transmission- to control the power‘ means
mined value.
-.
'
4-
p
-
13. In a torque transmitting mechanism -a
which operates the ‘valve means for automatic
planetary gear set including a-sun gear, a ring v '.
forward drive.
meshing with the sun» and ring gears,v a brake
'
10. A torque transmitting mechanism compris- '
gear and a planet carrier carrying planet pinions
ing a plurality of planetary gear sets,- means enj- ' a to hold the planet'carrief against rotation for ‘ '
closing the gears of said gear sets and, providing 40 reverse drive, means enclosing thegears of the
inlet and outlet ports therefor whereby they form
?uid pumps, shiftable valve means controlling the
‘ inlet and outlet of ?uid to the gear sets, atbr'ake ' »‘
engageable with anelement of ‘one of the gear
sets to reverse the .drive therethrough, a pair of. .
‘therefor
gear set?and
whereby
providing
it forms
inleta and
?uidexhaust
pump, ‘ports
valve‘ ,
means controlling said ports and controlling the
gear set to form a clutch‘ for forward drive and l
a check _'valve to prevent ‘reverse- flow of ?uid
, through the inlet port to prevent overrunning vof
cylinders, pistons in the cylinders connected re
spectively to the brake and the valve means,‘
the gears.
valves connected to the cylindersat axially spaced '
' points to.‘ control communication thereof with a >
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