Abstract: Apparatus for controlling the air to gas ratio of fuel supplied to a gas engine that includes a conduit connecting the carburetor to the intake maifold of the engine. A throttle valve is located in the conduit for varying the flow area therethrough in response to load changes on the engine and a regulator device including a controller and gas regulator for changing the air to fuel gas ratio of fuel supplied to the engine in response to the position of the throttle valve.

Abstract: A process is described for the production of bearings for sustaining high loads, the bearings having indentations filled with soft overlay alloy. The indentations are produced by peening or embossing. The peening is preferably performed with rounded ceramic shot of 0.25 to 0.5 mm diameter. Indentations should preferably be between 0.01 and 0.05 mm deep. In one embodiment a bearing is described having alloy comprising a steel-backed aluminium-based bearing alloy having a composition of, for example, Al-Sn2O-Cul and a soft Pb-Sn10 overlay there also being an interlayer of 3 to 5 .mu.m of nickel between the bearing alloy and the overlay. Bearing surfaces having a continuous overlay or a composite surface comprising randomly-shaped areas of bearing alloy and overlay may be produced.

Abstract: A fuel system includes a carburetor wherein the throttle valves for the air and fuel are located upstream of the mixing chamber and are moved conjointly to maintain the desired air/fuel ratio over a variation in engine speed. The desired changes in air/fuel ratio can be made by, in one embodiment, utilizing a throttle valve in an auxiliary air passageway whereby more or less air is added to the mixture and too, by providing for the relative angular displacement of the air throttle valve as compared to the full throttle valve while maintaining conjoint movement thereof once the desired air/fuel ratio has been attained.

Abstract: The air fuel ratio control systems described for controlling the air fuel mixture being supplied to the prechamber of gaseous fueled, internal combustion engines includes a pressure control regulator that is responsive to inlet manifold pressure to assure that the pressure of the fuel supplied to the prechamber is as desired and includes volume flow control valves arranged in the air conduit and in the fuel conduit for providing the desired air fuel ratio. Further, the system may include controls for providing relatively rich fuel mixtures or fuel only to the prechambers at certain phases of operation of the engine.

Abstract: An improved carburetion system for gaseous fueled, spark ignited, internal combustion engines that includes pressure regulating and sensing apparatus to vary or cause the variation of the fuel/air ratio to automatically compensate for changes in the heating value and chemical composition of fuels being burned in the engine.

Abstract: Apparatus for controlling the air to gas ratio of fuel being supplied to a gas engine that utilizes the pressure in the inlet of the carburetor and the pressure in the intake manifold of the engine to control a regulator that is used to supply gas to the engine. The control mechanism is responsive to a signal from an intelligence source, such as an exhaust gas sensor, for varying the air to gas ratio to a preset or desired air to gas ratio. A method for controlling the air to gas ratio of fuel being supplied to a gas engine wherein an engine function is sensed and a signal generated representative of the function. The signal is compared with a reference signal and a resultant signal is generated. Pressure is then generated that is representative of the resultant signal and the pressure is applied to the regulator to cause a predetermined rate of flow of gas to the carburetor, thereby controlling the air to gas fuel ratio to the engine.