Electric fuel injection control system for internal combustion engines

Claim 1

An electric fuel injection control system for an internal combustion engine having electromagnetic valves for operating fuel injection valves of the engine, and operative to inject fuel in response to injection pulses each having a pulse width varying as a function of operating parameters of said engine and for energization of said electromagnetic Valves, comprising: means for detecting the rate of engine acceleration and producing a first signal when that rate exceeds a predetermined level, means for receiving said first signal and responsive to said first signal for generating a fuel injection signal having a controlled pulse width, means for applying said injection signal to said valves to operate said fuel injection valves for an interval corresponding to said controlled pulse width, in addition to operation dependent upon engine operating parameters, and means for independently adjusting said predetermined level and said controlled pulse width, wherein said producing and generating means includes a permanent magnet movable in response to the operation of the throttle valve of the engine, an induction coil electrically coupled to said permanent magnet for producing an output voltage upon operation of the throttle valve, and means for comparing said output voltage with a reference voltage having said predetermined level, and wherein said adjusting means includes a first variable resistor for adjusting said reference voltage; and wherein said generating means includes an oscillator means for receiving an output of said comparing means and producing said fuel injection signal, said oscillator means including a time-constant circuit for determining said controlled pulse width and wherein said adjusting means includes a second variable resistor for adjusting said time-constant circuit, and further including a means for detecting an engine operating parameter and producing a sequence of parameter injection pulses which each have a width which varies as a function of said engine operating parameter and wherein said applying means applies said parameter injection pulses as well as said injection signals to said valves, wherein said applying means includes means for causing all of said valves to inject fuel simultaneously while said injection signal is being applied.