US2165628A

US2165628A - Hydraulic control for carburetors

Info

Publication number: US2165628A
Application number: US154292A
Authority: US
Inventors: Gordon W Gallihugh
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-07-17
Filing date: 1937-07-17
Publication date: 1939-07-11
Anticipated expiration: 1956-07-11

Description

y 1939- G. w. GALLIHUGH 2,165,623

HYDRAULIC CONTROL FOR CARBURETORS Filed Jul 17, 1937 2 Sheets-Sheet 1 IIlW Ml l x Wm E 9% \mm d N nou 9 m QM m i y 11, 1939- Q G. w. GALLIHUGH 2,155,523

HYDRAULIC CONTROL FOR CARBURETORS Filed July 17, 1937 2 Sheets-Sheet 2 O gwucwtoo QW. Gallihugh/ Patented July 11, 1939 a UNITED STATES PATENT orr cs 2,165,628 nvmmuuo con-mon- FOR onnnonn'rons Gordon w. Gallihugli, Flint, Mich. Application July 17, 1931, Serial No. 154,292

2 Claims.

The invention relates to improvements in hydraulic control mechanisms for carburetors.

One' of the objects of myinvention is to provide means'for more effective control of the carburetor wherein no lost motion between the accelerator and the carburetor lever occurs.

Another object of theinventionis to provide means for avoiding flooding of the carburetor owing to sudden application of too much fuel as in the case of excitement on the part of an operator.

Another object of the invention is to provide means for indicating to the operator the quantity of fuel being supplied to the carburetor.

A further object of the invention is to provide suitable means for balancing the fluid in the pipe line and cylinders of the hydraulic control mechanism.

A still further object of the invention is to provide means permitting independent movement of the carburetor lever by the hand controllever on the steering wheel.

Other objects and advantages of the inven-' iting the invention to. the precise details therein 30 set forth.

In the drawings: Fig. 1 is a,side elevation of the hydraulic control system as a whole shown applied to a motor vehicle.

35 Fig. 2 is a detailed section showing the hydraulic foot control unit and the liquid balancing unit of the system together with the intervening connections.

Fig. 3 is a side view showing the carburetor 40 control unit and the oscillating link carburetor connection.

Fig. 4 is a detailed view showing the safety pressure unit with which the system is equipped. Fig. 5 is a detailed view of the fluid charging 45 unit, and

Fig. 6 is a detailed view of the fluid pressure gauge.

The principal parts of the system are the hydraulic footcontrol unit A actuated from the 50 usual foot lever, such control unit being preferably attached to the floor board of the automobile in a position convenient for the right foot of the operator. The foot control unit is connected through suitable passages to a four-way stand- 55 ard coupling B above which is mounted a liquid balancing unit C by means of which the pressure of the fluid may be properly adjusted. To another outlet of the coupling B is connected the cushion carburetor control until D which connects through an oscillating link carburetor con- 5 nection E with the usual fuel lever.

On the side of the oscillating link connection E opposite to the foot control unit are located other hydraulic units constituting a follow-up system to an indicator located on the dash of the automobile. These units include a. safety pressure unit F which communicates through a fluid connection with a three-way standard coupling G bymeans of which fluid is supplied to this branch of the system, which unit in turn communicates with an indicator H of any suitable type located on the dash of the automobile.

The component parts of the system will now be described in further detail.

The foot control unit A comprises a foot pedal 20 I 0 which may be of standard construction and which engages an accelerator button I l constituting the head of a piston 12. This piston may be composed of tool steel hardened and ground and metallic packing may be employed in the groove of the piston head l2a to prevent the passage of fluid. The piston head itself may be made of brass or steel. 'The piston I 2 operates in a cylinder l3 which may be of aluminum, brass, malleable iron or cast iron..v The cylinder as shown is provided with a fiange l4 adapted to fit over the floor board l5. The cylinder contains fluid l6 such as oil or the like.

A suitable adjustable fitting l'l screwed into the bottom of the cylinder l3 connects the same with a pipe l8 whereby fiuidpressure is communicated to the four-way coupling unit B, an adjustable fitting is, similar .to the fitting l1, being employed at the opposite end of the pipe ill. The coupling comprises a casing 20 having four 40 outlets. Into one of these outlets there is removably secured an adjustable screw-threaded plug 2| whereby fluid may be drained from the coupling. Into the upper opening of ,the coupling is screwed a nipple 22 through which 'communication is had with the balancing unit C.

.This unit includes a liquid supply cylinder 23 which may be formed of brass, malleable iron, aluminum, cast iron or other suitable material. Within this cylinder a piston 24 is mounted which piston may be formed of tool steel hardened and ground with a metallic packing employed in the groove.v

An adjusting screw 25 operates within the cylinder and is adapted to engage the piston 24.

The adjusting screw is provided with a knurled head. The screw may be composed of soft steel or brass. Below the piston and engaging the same is a coil spring 25 which may be of spring steel wire. The lower end of the spring is adapted to engage the nipple 22.

Leading from the unit B toward the carburetor control unit D is an adjustable fitting 21 similar to the fittings l1 and ill from which leads a pipe 28 having an adjustable fitting 29 entering the carburetor safety cushion control unit D. The 'unit D comprises a cylinder 30.which may be of aluminum, brass, cast iron, malleable iron or other suitable material, within which works a piston 3! formed of tool steel preferably hardened and ground and provided with suitable packing. ,The stem am of the piston projects beyond the cylinder 30 and is connected to a link 33 which in turn is connected with the carburetor oscillating link

coupling E. Pivots

32 and 34 connect the link 33 with the piston stem am and the link control E respectively.

The unit E includes an oscillating link 35 which may be of brass, steel or aluminum and which is provided with a slot 36. The link is connected through an anchor boss 31, which may be of brass or steel, to the usual carburetor lever 38.

The unit E is in turn connected through a short link 40 to the stem 4i forming part of the safety pressure control unit F. Pivots 39 and 40a connect the link 40 to the slotted link 35 and the piston rod 4| respectively.

The safety pressure control unit F includes a cylinder 42 which may be of any suitable material such as aluminum, brass, malleable iron or cast iron; The piston Ma works in this cylinder and is composed of tool steel hardened and ground, and metallic packing may be used in the groove.

The cylinder will contain fluid similarto that employed in the other branch of the system and communicating with said cylinder is an adjustable fitting 43 similar to the fittings I1 and I9, etc. which connects through a pipe 44 to another fitting 45 entering the charger connection unit G. This unit is shown as comprising a three-way coupling which may be formed of brass, cast iron, malleable iron or steel such coupling being provided with a standard -inch check valve 41. .Leading from the unit G is an adjustable obtain the proper alignment to accomplish the The liquid pressure gauge H may beof any V special or standard make and as shown includes a casing 52, a dial 53 and a pointer 54, by

means of which the pressure within the line 49 is indicated.

The hydraulic control system including the carburetor control, cushion safety connections and hydraulically operated gauge or meter may be used on all types of vehicles fueled by means of liquid carburetion and their use makes for safety and economy.

As a matter of safety the system prevents the stalling of the motor in dangerous places such as is often caused by the supplying of an excessive amount of gas to the carburetor. As to economy the gauge reading in pounds gives the operator something to go by so as to permit him to operate the motor at its greatest efliciency preventing waste of gasoline'and materially improving the mileage per gallon.

The herein described system including the hydraulically operated meter, cushion safety device and carburetor control make possible an effective control of the carburetor with no lost motion between the foot operation and the operation of the carburetor lever. The device promotes safety because of the cushion control due to the resistance of the safety pressure control unit F. This unit cushions thesuddenon-rush of fluids and creates a pressure which prevents the carburetor from operating excessively thus avoiding stalling of the motor. This cushion control will not prevent or interfere with normal control or operation of the fuel lever.

A pressure reading on the gauge H results from any movement of the carburetor lever, thereby detecting variations in fuel consumption and disclosing any motor inefficiency. Obviously the higher the reading in pounds on the pressure gauge H the more fuel is being consumed whether it be due to inferior gasoline, heavy load, weather conditions or inefficiency of the motor itself. The

gauge also readily determines the kind of gas best adapted for the particular car regardless of 4 age or condition of the motor. The gauge controls the gas economy and is beneficial to any and all motor operators.

The unit C serves to balance the fluid in the pipe line and cylinders by means of the adjusting piston 24, the adjustable screw 25 forcing the piston against the fluid oil so as to completely fill the pipe line and foot control cylinder.

It will be apparent that the least application of pressure on the piston l2'a in unit A will create a corresponding operation of the fuel control lever 38 owing to the operation of the cushion safety control unit D; Any movement on the part of the piston 31 within this unit is counterbalanced by .the movement of the piston in the safety pressure control unit F, thus preventing supply of excessive fuel which might result in stalling of the motor.

The charger connection G is used for filling the gauge line and the pressure control unit cylinder in unit F.

The invention has been described in detail for. purpose of illustration but it will be apparent that variations and modifications may be resorted to without departing from the spirit of the invention.

I claim:

1. In a hydraulic control system for carburetors, a hydraulic foot control unit, a four-way coupling unit communicating therewith, a liquid balancing unit communicating with one leg of the coupling, a filler plug fitting into another leg of the coupling for supplying fluid to the 1 system, a cushion carburetor control unit communicating with the fourth leg of the coupling, an oscillating link carburetor connection actuated from said control unit, a safety pressure unit located beyond the link connection, a filler coupling in the pressure line beyond the pressure unit having means for supplying fluid to the system, there being interposed between the carburetor control unit and the safety pressure unit.

2. In a device of the character described, a fuel leve a link connected to said lever having portions extendingin opposite directions from said lever, a pair of opposed hydraulic cylinders at opposite sides of said link having reciprocating pistons therein, means connecting one of said pistons to one end of said link and means connecting the other to the other end, and a pair of hydraulic lines one communicating with one of said cylinders and the other with the other of said cylinders, one line being connected with 5 manual accelerating means and the other with an indicating gage.

' I GORDON W. GALLIHUGH.