Abstract: The fuel injection system for a mixture compressing externally ignited internal combustion engine includes a flow sensing member (3) arranged in an air intake duct (1), the member (3) moving in accordance with the quantity of air flowing through the duct so as to actuate a fuel dispensing valve (7) and to dispense a quantity of fuel to fuel injection nozzles (9) of the engine. The pressure difference in the dispensing valve (7) is maintained constant by means of a pressure sensitive valve (11) and a differential pressure control valve (20). The differential pressure control valve has two chambers (22 and 23) separated from each other by a rigid wall (21) and include diaphragms (24 and 25) arranged parallel to each other. The diaphragms are maintained at a fixed spacing from each other by a bolt (33) and both diaphragms are actuated by springs (37) and (42) which urge the diaphragms against each other.

Abstract: A fuel injection system (10) for injecting fuel into the combustion chamber of an internal combustion engine includes a multi-way valve (30), a solenoid (42) for controlling the operation of the valve, a shuttle valve (38) that is moved within a shuttle chamber (37) in response to the change of state of the solenoid, and an intensifier piston (62) having an upper cylinder (62) movable within actuating chamber (49) and a lower cylinder (66) movable within metering chamber 50. The position of the shuttle valve, in turn, regulates the admission of pressurized fuel from a high pressure pump (152) into the actuating chamber (49) to drive the intensifier piston in a first direction. The lower cylinder 66 of the piston 62 is movable within the metering chamber (50) to amplify the pressure of the fuel to a level several times greater than supply pressure prior to introducing same into a fuel injector (78) for discharge into the combustion chamber.

Abstract: During engine operation at low induction passage pressure, a carburetor main metering rod and idle bleed valve are reciprocated between a rich position and a lean position in response to energization of a solenoid according to a pulse width modulated duty cycle, while during operation at high induction passage pressure, the metering rod and bleed valve are moved to the rich position by a piston/spring combination.

Abstract: A pump nozzle for an air-compressing injection internal combustion engine with a mechanically actuated pump piston and with an inlet bore connected with the pump working space, through which fuel is fed to a nozzle needle, as well as with a return bore for leakage oil and a control device influencing the fuel delivery; a valve which is actuated in the rhythm of the engine and which with an increasing fuel pressure separates the inlet line from the pump working space is arranged in the flow path of the inlet bore upstream of the pump working space, whereby the closing position of the valve is lifted by opening of a discharge bore leading to the return bore.