US2870649A - Combined control for carburetor and transmission - Google Patents

Description

Jan. 27, 1959 Y K. M. ZEMKE 2,870,649

COMBINED CONTROL FOR CARBURETOR AND TRANSMISSION Filed Sept. 20, 1957 2 Sheets-Sheet 1 27, 1959 K. M. ZEMKE I 2,870,649

COMBINED CONTROL FOR CARBURETOR AND TRANSMISSION Filed Sept. 20, 1957 2 Sheets-Sheet 2 IN VEN T OR.

United States COMBINED CONTROL FOR CARBURETOR AND TRANSMISSION Application September 20, 1957, Serial No. 685,329 12 Claims. ('Cl. 74-472) This invention relates to a combined control for operating a plurality of devices by a single member and more particularly to a combined accelerator pedal control for carburetor, throttleand choke valves and automatic transmission.

Motor vehicles utilizing automatic transmissions generally have accelerator pedal controlled devices such as a throttle valve and/or downshift valve. The usual practice is to operate the so-called transmission throttle valve in accordance with the position of the carburetor throttle valve, and, hence, these elements are usually operated in common by the accelerator peda'l. Transmission forced downshifts are generally obtained only after the carburetor throttle valve has been substantially fully opened. In motor vehicles having carburetors employing automatic chokes, it is desirable to provide means for opening the choke if the carburetor becomes flooded with a cold engine. It is desirable that this choke opening or unloading take place only after the accelerator pedal has been moved past the forced downshift position.

It is therefore an object of the present invention to provide a combined control for the carburetor throttle and choke valves and an automatic transmission control, which control is of relatively simple construction and which can be easily adjusted and adapted for individual installations.

Another object of the invention is to provide a control of the foregoing character which can be operated by an accelerator pedal to initially jointly open the carburetor throttle valve and control the transmission, then control the transmission only, and finally open the carburetor choke valve if closed.

The invention utilizes two plates, one pivoted on the other with one of the plates movable by the accelerator pedal. Spaced stops are provided on one of the plates that cooperate with a stop on the other plate to limit relative movement between the two plates and a spring is provided between the plates to normally bias the plates into one of the stop positions. Initial movement of the accelerator pedal causes its attached plate, which is also connected to the transmission control, to move and through the normally engaged stop, actuate the second plate which is connected to operate the carburetor throttle valve. The two plates move together until,

the second plate has moved to wide open throttle position or in the case of a cold engine to almost wide open throttle position. Further movement of the accelerator pedal causes its attached plate. to overcome the bias force of the spring and further move the transmission control 'WitllOllt movement of the throttle Valve. Still further movement of the accelerator pedal causes fur ther rotation of its attached plate until a second set of stops acts to continue movement of the throttle or second plate and through suitable linkage to partially open the carburetor choke valve if the automatic choke control has closed the same.

Further features, objects and advantages of the invenatent J 2 tion will be apparent by reference to the following detailed description of an illustrative example shown in the accompanying drawings wherein:

Fig. 1 is a side view of the control and showing connections to the accelerator pedal and vehicle transmission;

Fig. 2 is a view of the control of Fig. 1 in which the parts have been moved to wide open throttle position and showing the connection to the carburetor choke valve;

Fig. 3 is a view similar to Figs. 1 and 2 in which the parts have been further moved to the wide open throttle position; a

Fig. 4 is a section taken on the line 44 of Fig. 2;

Fig. 5 is an exploded view showing the two control plates; I

Fig. 6 is a modified control assembly; and

Fig. 7 is a section taken on the line 7- -7 of Fig. 6.

Referring to the drawings and particularly to Figs. 1, 4 and 5, 1 is a conventional motor vehicle accerator pedal pivoted at 2 and connected to rotate a lever 3 that rotates a cross shaft 5 carrying a lever 7. A spring 9 acts on the lever 7 to normally hold the accelerator pedal 1 in its raised or closed throttle position. The lever 7 is connected'to a rod 11in turn connected to rotate an overtravel plate 13 through a spring clip 15 engaging a ball 17 on the end of a pin19 extending through an aperture 21 in the overtravel plate 13.

Also connected to the pin 19 is a transmission control rod 23 whose function and connection will be described below. The transmission control rod 23 is held away from the overtravel rod 13 by means of a spacer 25 on the pin 19. Also attached to the pin 19 is one end of a coil spring 27. The overtravel plate 13 is pivoted on a second plate 29, hereinafter referred to as the throttle lever plate, by means of a pivot assembly generally indicated at 31. This assembly consists of a bolt 33 that passes through an aperture 43 in the throttle plate 29 and an aperture 45 in the overtravel plate 13. A bushing 35 secured to the overtravel plate allows the bolt 33 to rotate in the aperture 45. A nut 39 holds the bolt 33 non-rotatable with respect to the throttle lever plate 29.

The throttle lever plate 29 is'secured to a throttle lever shaft 47 pivoted in the body 46 of the carburetor C and carrying throttle valve thereon. The shaft 47 may have more than one throttle valve thereon or can be connected to actuate other shafts and throttle valves; however for illustration of the present invention only a single throttle valve 50 has been shown.

Relative motion between the overtravel plate 13 and the throttle lever plate 29 about the axis of the bolt 33 is limited by a stop assembly generally indicated at 51, the assembly 51 acting in a guide slot 49. Stop assembly 51 includes a bolt 52 having a head 53. The bolt 7 52' passes through an aperture 55 in the throttle plate 29 and is secured thereto by a nut 59 and a bolt shoulder 57. An adjusting screw 63 is threaded through head 53. The main body of the bolt 52 acting against one end of the slot 49 acts to limit counterclockwise movement of the plate 13 relative to the throttle lever 29 as viewed in Figs. 1, Z and 3 while the threaded end of the adjusting screw 63 acts against a stop lug 69 formed on the overtravel plate 13 to limit clockwise rotation of the overtravel plate 13 relative to the throttle lever plate 29.

As seen in Figs. 1 through 5 the lower end of the throttle lever plate 29 carries a pin 65 extending through aperture 67 formed in plate 29. The pin 65 carries the other end of the spring 27. It can be seen from Fig. 1, which illustrates the normal position of the assembly, spring 27 acts between pins 19 and 65 to pull the overtravel plate 13 counterclockwise until the end of the slot 49 engages the shank portion of the bolt 52. As seen in Figs. 2 and 4 the carburetor type and which is not shown in the drawing. The choke valve shaft 73 carries on its end a fast idle, choke unloader lever '75 that is connected'through a bent rod 77 to a combination fast idle and choke unloader cam 79 pivotally mounted on the carburetor body 46. As seen in Fig. 2 the fast idle cam 79 has conventional fast idle notches '81 formed thereon which act to engage an adjustable idle screw, not shown, carried by the throttle plate 29. This idle screw is of conventional type and to avoid confusion has not been shown in the drawings. The fas't idle cam 79 has an extension lug 83 adapted to engage a choke unloader and throttle plate stop 85 as seen in Figs. 2; 4 and 5 The transmission control rod 23 connected to the pin.

19 is suitably connected to a transmission 92, for example, by a bell crank 87 carried on a fixed pivot 89, a crank 87 that operates a rod 91 leading to the transmission control lever 93 and mounted on the outside of the transmission 92. The control lever 93 acts to move the transmission throttle valve and/or downshift control.

in the transmission or any other transmission control that may be desired. Operation Fig. 1 shows the parts in their normal or closed throttle, accelerator pedal released position. Pressure on the accelerator pedal 1 by the vehicle operator causes lever 3, cross shaft 5 and lever 7'to rotate clockwise, as viewed inFig. '1, causing rod 11 to move to the right and through pin 19, cause overtravel plate 13 to move to the right. The end of guide slot 49 acts againstbolt 53 to move the throttle lever plate 29 clockwise about the axis of the throttle valve shaft 47. Through the transmission control linkage 23, 87,9 1Vand 93 the transmission throt tle valve is controlled to vary the. shift points of the transmission, hydraulic pressures, etc. Simultaneously, clockwise rotation of the plate 29 causes the throttle valve shaft 47 to open the throttle valve 50. Continued movement of the accelerator pedal downward acts to continue the above action until the stop 85 (Figures 2 and 4) on throttle, plate 29 engages the choke unloader lug 83 "on the fast idle cam 79. Lug 83 may be in a number-of different positionsdepending on the temperature of the engine and, hence, the amount of opening of the choke valve 71. If the engine is cold the fast idle cam 79 will have been moved by the rod 77 and lever 75 to a fast idle'position. This movement of the fast idle cam is caused by the automatic choke control (not shown) acting to close the choke valve 71 and simultaneously moving lever 75 and rod 77. With the choke valve 71 closed and the cam 79 in the fast idle position as shown in Fig. 2 the throttle lever 29 will rotate the throttle valve 50 open only until stop 85 engages the'extension lug 83 on the fast idle cam 79. in

this position the throttle valve 50 will he almost open but not completely so. If the engine is warm and the automatic choke control has opened the choke valve 71, the rod 77 will have moved the fast idle cam 79 clockwise as viewed in Fig. 2. With the cam 79 in its slow jidle position, the stop 85 on throttle lever 29 will not engage extension lug 33 untilth'e throttle valve 50 is fully opened.

After accelerator pedal 1 has been depressed to the point Where overtravel plate 13 has moved throttle lever plate '29 to a position wherein stop 85 engages lug 83, the automatic choke mechanism acting-through lever 75, rod 77 and the extension 83 on the fast idle cam 79 resists further clockwise rotation of the throttle lever 29. Further depression of the accelerat r pedal 1 then I 4 causes the overtravel plate 13 to moyeto the right as seen in Figs. 1, 2 and 3 and because of the resistance imposed on the throttle lever plate 29 by the automatic choke, the overtravel plate 13 moves alone, rotating about the pivot 33 and expanding the spring 27. It will be noted from Fig. 1 that initially the rod 11 pulls on plate 13 in a direction so that it aids spring 27 in holding the end of the slot 49 against the bolt 53. However, as the two plates rotate about the axis of shaft 47 the line of action of rod 11 acting on plate 13 crosses an imaginary line drawn between the pivot 33 and the stop bolt 53. Once this line has been crossed the action of rod 11 on the plate 13 causes it to rotate clockwise about pivot 33 and pull the end of slot 49 away from thebolt 53 against the rorce of the spring 27. As this latter action occurs the plate 13 rotates clockwise about pivot 33 from the position shown in Fig. 2 to that shown in Fig. 3 where the end of adjustingscrew 63 engages t-he-overtra-vel plate stop lug'69. This rotation-of the overtravel plate 13 alone has caused furthermovement of the transmission controlrod 23 and through its associated'linkage caused the transmission to downshift.

By adjustment of screw 63 in the stop bolt 53, the position of plate 13'and rod 23, at the end of the movement of plate 13alone, can be predetermined, and the mechanism. is therefore useable in difierent car installaand 29 to the'position shown in Fig. 3, if the choke valve 71 is not-fully opened, then further depression of the accelerator pedal moves the 'overtravel plate 13 and through the adjusting screw 63 and stop 69 :positively causes rotation of throttle lever ,plate 29-about the axis of shaft 47. This movement of plate 29-causes the choke unloader stop to positively force-the fast-idle cam extension 83 clockwiseand movetherod 77 downwardly to rotate choke lever 75 counterclockwise overcoming the'resistance to movement of valve 71 imposed by the automatic choke mechanismas seen-in Fig.2. Shaft 73 then partially opens the choke valve 71 to allow airto flow through the carburetor tovaporize liquid gasoline that may be collected. If the engine ;had been warm during the initial movement of the acceleratonpedal from its closed to its openthrot-tlemosition,the stop fiS will nothave contacted the =extension8-3 until-the throttle is Wide open wherein the lug88-on'the choke lever '75 engages'the stop 90 on the-carburetor valve 'body46. Under these conditions there is :no further movement of the mechanism beyond the forced doWnshift-position of Fig. 2.

In the modified form of the device shownon Figs. 6 and -7 the overtravel plate 13 base cut out portion 92 havingends 9 1a and 9112. This cut out portion 92 replaces the .guide slot 49 of the embodiment shown in Figs. 1 through 5. Inthe species of Figs. 6 and 7, the adjusting screw shown in Figs. 1 through 5 has been eliminated, the stop bolt-53 acting against the ends 91a and 91bto-limit the relativemotion of'plate 13 about pivot 33. The operatiorrofthis-form' is-the same as that ofFigs. 1 through 5;-however a simpler construction is utilized.

Itcan be seen that the invention provides a combined control for the carburetor throttle valve, transmission control and carburetor choke valve which is of simple construction and yet 'eflieiently performs the desired functions. It is understood-thatother applications of'thc invention will be readily apparent to (those skilled in the art and-that other modificationsand physical changes can be made withoutdeparting from'the invention, which is to'be limited only by the following claims.

What is claimed is:

1. A combined control for carburetor throttle, transmission throttle, and choke valves comprising a first plate rotatable on a first axis and connected "to rotate said carburetor throttle valve, a secon'd'plate pivotally secured to said first plate on a second axis, yieldable means be tween said plates for compelling said plates to rotate in unison about said first axis, said plates being rotatable one relative to the other about said second axis within a limited range, manually operated linkage connected to said second plate to cause rotation of said plates and said carburetor throttle valve in unison in a first range of movement about said first axis under the compulsion of said yieldable means, linkage between said second plate and said transmission throttle valve, and means carried by one of said plates adapted to engage means on said other plate for compelling said plates to further rotate in unison about said first axis in a second range of movement beyond said first range.

2. A combined control for carburetor throttle, transmission control, and choke valves comprising a first plate rotatable on a first axis and connected to rotate said carburetor throttle valve, a second plate pivotally secured .to said first plate on a second axis, yieldable means between said plates for compelling said plates to rotate in unison about said first axis, manually operated linkage connected to said second plate to cause rotation of said plates to move said carburetor throttle valve from closed position to substantially wide open position, linkage between said second plate and said transmission control valve to cause movement of said valves simultaneously, said second plate being rotatable on said difierent axis through a limited range when said carburetor throttle valve is in substantially Wide open position to cause further movement of said transmission control valve, means carried by one of said plates adapted to engage means on said other plate for compelling said plates to rotate in unison about said first axis in a second range, and means carried by said first plate adapted to move said choke valve from a closed position to an open position during said second range unison movement.

3. A combined control for carburetor throttle valve, transmission control, and choke unloader comprising a first plate rotatable on a first axis and connected to rotate said carburetor throttle valve, a second plate pivotally secured to said first plate on a second axis, a plurality of cooperating members carried on said plates, a first group of said formations when engaged preventing rotation of one of said plates relative to the other in one direction, a second group of said members when engaged preventing rotation of said one plate relative to the other in the other direction, resilient means biasing said first group of members together, manually operated linkage connected to said second plate to cause rotation of said plates to move said carburetor throttle valve in unison from closed position to substantially wide open position, second linkage between said second plate and said trans mission control, said second linkage causing movement of said transmission control simultaneously with said carburetor throttle valve, said second plate being rotatable about said second axis when said carburetor throttle valve is in substantially wide open position to cause additional movement of said transmission control, and choke unloading means actuated by said first plate being moved in unison with said second plate by said second group of members when said second plate is moved beyond its position causing additional movement of said transmission control.

4. A combined control for carburetor throttle valve, transmission control means, and choke unloader comprising a first plate rotatable on a first axis and connected to rotate said carburetor throttle valve, a second plate pivotally secured to said first plate on a second axis, yieldable stop means limiting rotation of said first plate on said first axis, a plurality of cooperating members carried on said plates, a first pair of said members limiting rotation of one of said plates relative to the other in one direction, a second pair of said members when engaged preventing rotation of one of said plates relative to the other in the other direction, resilient means biasing said first pair of members together, manually operated linkage connected to said second plate to cause rotation of said plates and open said carburetor throttle valve plate overcoming said yieldable stop when said second pair of members are in engagement and said second plate is moved by said manually operated linkage beyond its position causing additional movement of said transmission control means.

5. A combined control for a carburetor throttle valve, transmission control and choke unloader comprising a first plate rotatable about a first axis and connected to rotate said carburetor valve, yieldable stop means limiting rotation of said first plate about said first axis in a carburetor valve opening direction, a second plate pivotally mounted on the first plate on a second axis, cooperating means carried by said plates and when engaged preventing relative movement between said plates in one biasing means has been overcome and said plates have rotated relative to each other, manually operated linkage connected to said second plate and movable through a first range to cause limited rotation of said plates to open said carburetor valve until said first plate engages said yieldable stop, second linkage connecting said second plate and said transmission control for causing movement of said control simultaneously with movement of said carburetor valve, said manually operated linkage movable through a second range to cause said second plate to rotate on said second axis against said biasing means to cause additional movement of said transmission control, and third linkage adapted to actuate said choke unloader, said manually operated linkage movable through a third range to move said second plate and through said second cooperating means, to move said first plate against said yieldable stop to move said third linkage to actuate said choke unloader.

6. A combined control for a carburetor throttle valve, a transmission control and a choke unloader comprising a first plate rotatable on a first axis and connected to rotate said carburetor throttle valve, a second plate pivotally secured to said first plate on atsecond axis, a

pair of spaced stops carried by said second plate and cooperating stop means carried by said first plate, said pair of stops and said stop means cooperating to limit relative movement between said plates in both directions, resilient means biasing one of said second plate stops and said first plate stop means into engagement, actuating means for moving said second plate and through said resilient means to move said first plate iniunison to cause said carburetor valve to rotate from closed position to an initial substantially open position, linkage between said second plate and said transmission control for moving the same as the second plate is moved by said actuating means, said resilient means being arranged to allow relative movement between said plates until the other of said second plate stops engages said first plate stop means upon further movement of said second plate by said actuating means beyond the point where said carburetor throttle valve is open and thereby causes said linkage to cause further movement of said transmission control, choke unloader means adapted to be actuated an iques carburetor 'op'enpositi'on still further'movement of said second plate, by said actuating means causing said-other stop and said first, plate stop means to move saidffirst plate beyond its initial carbureto'r'op'e'n position.

7. The control of claim 6 Whereinthe stop onsaid'first plate is adjustable to vary the extent of relative movement between said plates.

8. The control of'clairn 6 wherein the stops-on said second plate comprise ends of aslot-formed in said second plate and the stop on said first plate comprises a member carriedby said first plate" and "extending into said slot.

9. The control of claim 6 wherein said second plate has a slot oneend of 'whichforms 'one'of said stops and aprojection that forms the other of "the second plate stops, a member'carried by said 'fir'st plate extending into said slot forming said first plate stop means, one portion of said member cooperating with said slot end to prevent relative motion'between 'the plates in one direction and another portion of said member cooperating with said projection to prevent relative motion'between the plates in the other direction.

10. The control of'claim 9 wherein one of the portions of said member is adjustable relative to the other whereby the range of relative movement between said plates is adjustable.

11. A control for-a plurality of independent devices comprising a first plate pivoted on a first axis and connected to actuate one of said devices, a second plate pivoted on said first plate on a second axis, biasing means urging rotation of said second'plate relative to said first plate about said second axis in one direction of rotation, cooperating stop means carried by said plates limiting rotation of said second plate about said axis in said one direction, second cooperating stop means carried by said plates limiting rotation of said second plate on said second axis in the opposite direction of rotation, actuating means connected to said second plate at a point spaced from said second axis to move said second plate,

said actuating means initially acting in a direction relative to a line on said second plate between said vpoint and said second axis to rotate said second plate and said line about said second axis in said one direction and through said first stop means to rotate said first plate about said first axis to actuate said one device, linkage connecting said second plate to a second of said devices for movement therewith, rotation-ofsaid line on said second plate beyond azpredeterrnined angle causing said actua-ting-means to act on said secondplate in a direction relative to said line to rotatethe second, plate on said second axisag'ainst said biasing means in said opposite direction and simultaneously move -said--linkage to operate said second device, said -s'econd*stop means limiting relative rotation of said second plate in saidopposite direction, means carriedbysaid first plate for coutrolling a third of said devices upon further movementof said first plate, further action of said actuating means causing movement of said second plate, and through said second stop means, movement of said first plate about said first axis to cause-saidthirddevice coritrolling means to act.

12. A combined control for a plurality of independent devices comprising a first plate pivotedon a first axis and connected to actuate one of said'devicesthrough a first range of movement and a second device through a second range ofmovement, a second plate pivoted on said first plate on a second axis, biasing, means urging rotation of'saidse'cond jplate relative to said first 'plate about said second axis in one direction of rotation, cooperatingstop means carried by said plates limiting irotationof said second plate about said axis in said one direction, second cooperating stop means carried 'by'said plates limiting rotation of said/second plate on said second axis in the opposite direction of rotation, actuating means connected to said second plate at a point spaced from said second axis'to move said second plate, said actuating means initially acting in a direction relative to a line between said'ipoint and said secondjaxis to rotate said second plate and said line about said second axis in said one direction and through said first stop means to rotate said first plate about said'first axis to actuate said one device, linkage connec'tingsaid second plate to a third of said devicesfor movement therewith, rotation of said line beyond a predetermined angle causing said actuating means to act on said second plate in a direction relative to saidline'torotate the second plate in said opposite direction against'the tforce of said'b'iasing means and simultaneously movesaid'linkage to operate said third device,,said second stop means limiting rotation of said second'plate relative to'theffirst plate in said opposite direction, further ac'tion'of said actuatingmeans'thereafter causing movementof said second plate, and through said second stop means, cause movement of "said first plate about said first axis in its secon'd'range of moveme'nt'to actuate said second device.

Hey et a1. May 951944

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