Патент USA US2115878код для вставки
May 3, 1938. ' H. RODMAN CARBURETOR ' 2,115,878 CONTROL DEVICE Filed April 24,‘ 1933 I , 2 Sheets-Sheet 1 1315-1 esnzsnonerea BRAKE - CLUTCH . ‘PEDAL _ E > ‘ .3 l" o )2, mvgmon 11 IO HUGH Room/w, Md. ' May 3, 1938. . H_ RODMAN . ‘ 2,115,878 _ CARBURETOR CONTROL DEVICE Filed April 24, 1933 2_- Sheets-Sheet 2 INVENTOR HUGH RODMAN, - BY 7021?} ATTORNEY 2,115,878‘ Patented May 3,‘ 1938 UNITED STATES PATENT OFFICE 2,115,878 . CARBURETOR CONTROL DEVICE Hugh Rodman, Chicago, Ill. Application April 24, 1933, Serial No. 667,758 ?claims. (0]. 192-—..01) is directly associated with the drive shaft the engine speed is regulated with relation to the My'present invention, in its broad aspect, has to do with the provision of means for automati cally controlling the operation of the-carburetor of a motor vehicle, and the consequent nature of 5 the resulting combustible charge delivered to the cylinders. More particularly it is my purpose to car speed. I Therefore on a car equipped with free wheeling; if the car is coasting down a hill and is going at a greater speed than the predetermined 5 set speed, the throttle valve will be closed and the provide an actuating piston and cylinder or bel lows assembly-in conjunction with an accelerator of an automobile (or other) motor which is inter-' 1o polated in a'vacuum line associated with the in take manifold of the motor, and with certain con motor idling. As the car loses speed on the level it will come back to the set speed and the auto trol devices in conjunction with the speedometer manual dial on the instrument board-which is and brake or clutch, thereby to automatically con calibratedin miles per, hour and geared to the trol the formation of the combustible charge 15 through the carburetor to conform with the speed of the motor and the circumstances of its opera tion. , ' . In attaining the various ends and objects-of my invention, I provide in conjunction with the ac 20 celerator and carburetor throttle rod a piston and ' cylinder assembly. Associated with the cylinder , is a vacuum line tapped into the intake manifold so that under ordinary circumstances the suction in the intake manifold will operate through the 25 vacuum line and cylinder to actuate the piston, which' in turn operates the accelerator and throttle actuating rod'of the carburetor. How matic control will then be effective to open the valve enough to hold the car'at its set speed. The 10 setting is accomplished ‘by the aforementioned vacuum tube holder in the control to adjust the same after the manner which will be hereinafter 15 , described in greater detail. a a . My invention also contemplates the provision of a unique control mechanism for use in con junction with they speedometer; this includes _ means whereby the admission ofv air to the vac- '20 uum line is not only regulated by'the car speed, but also manually by settingjat predetermined '. effective speeds. ' My device is effective and simple in construc tion and may be used either with or without free 25‘ _ wheeling, and with any conventional form of speedometer or carburetor; and it is effective in _ ever; I have provided means whereby the suction attaining better regulation of the combustiblev developed in the vacuum line is automatically 30 controlled thereby to make the operation of the accelerator and carburetor dependent upon cer tain conditions of operation of the motor vehicle. charge toythe end that motor operation is im proved and a saving eifected in the .gasolene con- 30 sumption. Other and equally important advan tages will be apparent as the description proceeds, These means include an automatic control device but interpretation _ of the invention should _be associated with the speedometer or actuating > made in the light of the claims. 35 mechanism similar to a speedometer whereby In the drawings wherein is illustrated the pre- 35 ' _ more or lessair is'admitted to the‘ vacuum 'line 3 ferred form of my invention;'-Figure 1 is a diagrammatic or schematic view ‘dependent upon the speed of vthe vehicle, and in cluded in said control device associated with the of my control device and system applied to the speedometer is a manualcontrol dial arranged on conventional parts of a motor vehicle; , - _‘ , ‘40 the instrument board for setting the automatic , Figure 2 is a simpli?ed form thereof; control to be effective at certain predetermined . Figure 3 is‘a front elevation of my control de speeds. I also provide 'an electrically operated vice associated. with the speedometer; device in conjunctionvv with the clutch or brake pedal for controlling admission of air to the vac 4o ' Figure 4 is a fragmentary perspective view of the gear mechanism for manually setting _-the' 45 uum line, and there is a manually adjustable con-' - position of the vacuum line; ' 45 Figure 5 is a top plan view of ‘my control device trol valve at the intake manifold to regulate the ' effectiveness of the same on the vacuum line. It associated with a speedometer; Figure 6 is a detail view of the vane used to con is pointed out, of course, that the pressure or_ ' effective .force of the vacuum line is dependent trol intake of air to the vacuum line; 5o on-the extent of. vacuum created, which in 'turn is dependent upon the ainount‘of outside air ad mitted thereto to counteract the suction action of the intake manifold. ' . . . . ' The control device can be mounted on any ‘type I 55 of speedometer or tachonietenand since,‘ either Flgure? shows transverse views (A andB)‘ of‘ 50 the types of ori?ces preferred for admission of air to the vacuum‘ line; and ' " '- - Figure 8 is a view of the cam wire used to: actu ate the air control vane in conformity with the speedometer reading. , i’ . . - ~ _ , _ ' 2 2,115,878 accelerator must be pressed to feed gas to the carburetor. If, however, it is not necessary to Figure 9 is a diagrammatic view of the valve control mechanism associated with the brake and clutch pedals. press the clutch as-in some improved forms of Figure 9A is a sectional view through the ?tting vehicle control or where neither the brake nor clutch pedals are depressed, the branch ‘I3 is closed, and my invention becomes effective. Accordingly it may be said that branch I3 is effec and valve on the intake manifold. In the drawings, like characters of reference . refer to like or similar parts throughout the sev tive to neutralize the action of my vacuum con eral views. trol of the carburetor when the brake and clutch Referring now particularly to‘ Figure 1; the 10 numeral l designates the intake manifold of a are in operation—in which case the car is under 10 standard control through the accelerator foot conventional motor power plant, and 2 the car buretor. The accelerator pedal is designated 3; the brake pedal 4 or the clutch pedal and the conventional speedometer by 5, while the car .15 buretor or throttle control rod is shown at 6. pedal. - A simpli?ed control of branch I3 is shown 1 Figure 2 in which a ‘foot button 22 having a spring 22a to hold it in normal position is utilized 15 All of these parts are conventional and form no to actuate valve 22b in casing 22c to close branch Y part of my present invention. In carrying my invention into effect, I provide I3. Assuming now that neither the brake is actu ated nor clutch disengaged, that is the car is simply running along in the usual manner in a main vacuum line (or pipe) designated 1 which 20 communicates with the intake manifold I through a ?tting 3 having a suitable form of manual transit. In this case control of the vacuum isv regulating valve 9. One end of the vacuum line through branch l2 in the manner 'which will now communicates with a cylinder ll having a piston be described. Branch‘l2 extends in proximity with the speed ll working therein, and the other end has 25 branches l2 and I3; respectively leading to the ometer 5 where it terminatesin an L-shaped speedometer 5 and to valve control mechanism tube connection 23 mounted on the plate 24 ex l4 associated with the brake or clutch pedal 4. tending from the speedometer housing. The Branches l2 and I3 are respectively intakes for plate 24 has a pair of brackets 25 each carrying air, and their effective regulation controls the an adjustable bearing element 26. Between the bearing elements 28 is mounted a shaft 21 carry~ 30 30 in?uence of the intake, manifold upon the vac uum line and the piston H- in cylinder II. That ingan annular plate or disc 28 and a gear 23; is, the maximum effectiveness of the suction the vacuum tube connection 23 is mounted onv action of the intake manifold on the vacuum line both the disc 23 and gear 29, and the gear 23 is is when both branches l2 and I3 are closed, in engaged by a'pinion 30 on a shaft 3| leading to a 35 which event the entire suction action is directed ‘ calibrated dial 32_ on the instrument board. 35 to the‘cylinder Ill/and piston II with the result These parts are shown in detail in Figures 3, 4, that the piston will be drawn forward and the accelerator pedal down. As the quantity of air admitted either to branches l2 and I3 increases, 40 the e?ective action of the intake manifold suction is reduced in the vacuum line and cylinder‘ I0 until the minimum‘ effectiveness of the in?uence of the suction in the intake manifold is reached when either (or both) branches l2 and I3 are 45 fully open, at which point the accelerator pedal is at its normal inoperative position and the motor and 5. The dial is calibrated in miles per hour, and by turning the dial the position of the vac idling. ' > - uum tube connection 23 can be adjusted on a radius having'the shaft 21 as a center. The plate 40 24 also has another set of brackets 33 carry ing adjustable bearing elements 34 in which is mounted a, shaft 35. The axis of rotation of the shaft 35 is the same as the axis of rotation of . the shaft 21. On the shaft 35 is mounted a vane 45 36 and a hair spring 31. The vane 36 swings in ' the same plane as the ori?ce 23a at the end of In order to attain effective and largely auto matic control of the carburetor I provide means‘ 50 in conjunction with the brake or clutch pedal which includes a valve. l5 normally latched in a closed position so that branch I3 is normally held closed when the brake or clutch is in inoperative the vacuum tube connection 23. This ori?ce may be slightly ?attened or otherwise as shown in views A and B of Figure 7. The vane has a 50 pin or stop 38 on its surface facing the ori?ce and this surface is preferably ground to form a closure over the ori?ce, either partial or com 55 lid and is T-shaped, with one arm'engaged by plete depending on the position of the vane with respect to the ori?ce in the vacuum tube connec spring I‘! to normally press on the valve stem II to force the valve in closed position against the tion.‘ The shank or standard 39 of the vane is partially screwthreaded to carry a counterbal position. The latch designated I6 is pivoted at , action of spring IS; the other arm of the latch is engaged by a solenoid 23 which in turn is ener 60 gized from a switch 2| arranged to be actuated. 65 . - _ 70 ancing weight 43, and on the lower end ‘thereof is a. pin 4|. The pin ‘4| rides inside of a wire cam 42' which is mounted on the post 43 of the 60 speedometer to -move when the reading on the after the manner shown in Figure 9, by the actu ation of either the brake pedal 4 or the clutch. speedometer dial changes. The cam is formed of pedal so that when pressure is applied to either, wire and is of the type giving a regularly increased angular velocity—for instance an Archimedes the switch 2l- having battery connections 2la will be closed to energize the solenoid, which in cam has " been found satisfactory. The hair 65 spring 31 serves to move the shaft 35 to so posi turn will throw the latch and the valve will be tion the vane that the pin 4| at all times engages forced open by the spring IS.‘ The switch 2|, as shown in Figure 9, is of a conventional form the inner face of the cam.- There is provided an having a spring pressed button engaged by the adjusting arm 44 for the hair spring 31. By brake pedal 4,‘ or the-clutch pedal as the case may this means when the readings on the speedometer be, to be-operative through the instrumentality _ ) Accordingly, ‘of the brake or the clutch pedal. when the brake and clutch pedals are depressed the vacuum line effectiveness is neutralized, and 75 the car is‘under conventional control; 1. e. the -v increase the cam is moved to throw the vane to ' gradually uncover the ori?ce inthe vacuum tube connection. The setting of the control mecha nism is effected by manually adjusting the posi tion of the vacuum tube connection by means of 75 ‘2,116,878 the dial 32 so that the automatic control through the instrumentality of the vane may be set to ' be e?ective at a certain de?nite number of miles per hour. , 3 , in the vacuum line, means connecting the valve with the clutch to open the valve when the clutch is actuated, and a control device in "the vacuum line connected with the, speedometer whereby ' The operation of my control is as follows;— Assuming that a car is coasting down a hill, and by reason of free-wheeling the vehicle has a greater speed than the engine speed; the throttle valve being shut off the engine will idle. As the when the speedometer readings vary, more or ' less air will be admitted to the vacuum line. _ 3. The combination in a'motor vehicle and power plant assembly, a cylinder and piston unit connected with the accelerator and carburetor, 10 vehicle loses speed on the level it will come back a vacuum line communicating with the cylinder to the set speed in which case the control will and intake manifold to actuate the accelerator and throttle of the carburetor upon increase of come into action and open the throttle valve enough to hold the car at set speed. The set suction in the vacuum line, a valve in the vacu ting is accomplished by means of the dial 32 which is set at the desired number of miles per hour, and the stop 38 lies against the side of the ori?ce when the speed is set and when the car speed is lower than the engine speed. When the car speed reaches the engine speed or set speed um line, means for normally holding the valve closed, means connected with the brake for open ing the valve, and a control device in the vac 20 the cam engages the pin and the-vane is moved ~4.-The combination in a motor vehicle and over the mouth of the ori?ce thereby letting in power plant assembly, a cylinder and piston unit connected with the accelerator, a vacuum line communicating with the cylinder and intake manifold to actuate the accelerator upon in; 2,5 air, thereby in turn permitting the throttle-to close enough to bring the car to set speed.’ Ex plaining. now the operation with respect to the several parts. The dial 32 is turned to ?x the set speed at so many miles per hour. This setting of_ the dial 32 moves the vacuum tube connection uum line having a valve device for admitting air to the vacuum ‘line as the speedometer reading increases. _ 20. crease of suction in the vacuum line, a valve in the vacuum line, means connecting the valve with the clutch to open the valve wher'rthe'clutch 23 through instrumentality'of pinion 30 and gear is actuated, a control device in'the vacuum line connected with the speedometer whereby when 29 and the movement of the vacuum tube con 30 nection in turn causes the wall of the ori?ce 23a. 4 the speedometer readings vary, more or less air 30 to engage the stop 38‘ on the vane 36 so that the will be admitted to the vacuum line, and means vane and the orifice are aligned with each other for setting the control device so that it will be and no air is admitted through the ori?ce into ine?‘ective except at certain predetermined the vacuum tube connection. In this case the speeds of the speedometer. ' 5. The combination with the. intake manifold, pin M at the end of- the vane is slightly moved I away from the cam 42. The cam will not engage carburetor and speedometer of a motor vehicle, the pin again until the speedometer reading is a vacuum line communicating with the intake equivalent to the miles-per-hour (set speed)' manifold and having a pressure responsive de reading of the dial 32; when the speedometer 40 reading reaches or passes the dial reading the vice interpolated therein and connected with the carburetor to regulate the explosive charge, and 40 a control device in the vacuum line and connect moved away from the ori?ce to let in air to the , ed with the speedometer; said control device comprising’ an opening in the vacuum line, and vacuum line. ' a vane movable to open or close the openingta From the foregoing it is believed that the op eration' and construction of my invention will ‘be cam connected with the speedometer, and means 45 on the vane engaging the cam to adjust the vane apparent, but since changes may be made in de tails to conform to varying conditions of prac- _ andthe admission of air to the vacuum line in pin 4! ,isre-engaged with the cam and the‘ vane tice, without departing from my inventivev con cept, emphasis is again laid upon the fact that 50 interpretation of the scope of my invention‘ should only be conclusive'when made in the light of the subjoined claims. I claim;— I ., ‘ l. The combination in a motor vehicle and accordance with the reading on the speedometer. 6. The combination with the intake manifold, carburetor and speedometer of a motor vehicle, 50 a, vacuum‘ line communicating with the intake manifoldand having a pressure responsive de vice interpolated therein and connected with the, carburetor to regulate the explosive charge, and 55 power plant assembly, a cylinder and piston unit ‘ a control device in the vacuum line and connect 55 connected with the accelerator, a vacuum line‘ ed with the speedometer; said control device communicating with the cylinder and with the ‘comprising an opening in the vacuum line,_and intake manifold, and having branch connections ' a valve mechanism controlling admission of air leading‘ to. the speedometer and to a relief valve, ‘to the opening, a cam associated with the speed- . ometer, and means connected with the valve and means in conjunction with the brake for con trolling the relief valve to admit air' to the vac ' engaging the cam so that the valve will be actu uum line when the brake is pressed, and means - atedgin accordance with the movements of the speedometer, and setting means including an ad in conjunction with the speedometer for auto matically admitting air to the vacuum line when justable mounting for the vacuum linevadjacent ' the opening therein, and manually operated to 65 65 certain predetermined speeds are reached. 2. The combination .in a motor vehicle and adjust the position of the vacuum-line with re power plant assembly, a cylinder and piston unit spect to the valve device to cause the same to connected with the accelerator, a vacuum line function'up'on predetermined speed readings on communicating with the cylinder and intake 70 manifold to actuate the acceleratorupon in crease of suction in the vacuum. line, a valve. the speedometer. Y . ' . ‘ - HUGH RODMAN.