Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1982-09-30
1984-07-31
Moy, Magdalen Y. C.
Internal-combustion engines
Charge forming device
Fuel injection system
123462, 123459, 13762547, F02M 3900
Patent
active
044623720
ABSTRACT:
Disclosed is a fuel injection system particularly useful on supercharged boat and vehicle drag racing engines which functions to provide a positively controlled uniform fuel/air ratio proportional to engine speed from idle through maximum engine horsepower operation. The system utilizes an engine-driven positive displacement pump supplying pressurized fuel to calibrated injection nozzles via a unique driver-controlled fuel metering valve. This valve has idle and full throttle positions for vehicle racing, but idle, partial and full throttle positions for boat racing. In each application, excess fuel entering a rotary metering valve is returned to the source via continuously open valveless passages and, upon initiation of acceleration, total fuel requirements are supplied to the engine instantly and without delay in a precisely controlled fuel/air ratio. During the initial phase of engine acceleration, the rate of fuel flow to the injectors is inversely proportional to the rate of return of excess fuel to its source and fuel pressure increases proportionately to the square of the increase in engine speed. During deceleration, excess fuel is automatically dumped to its source by the metering valve to safeguard against a pressure rise at the fuel pump outlet and the attendant highly destructive consequences.
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