Fuel injection control system for an automotive engine
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorYoshiyuki Sogawa
Life of this patent
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Abstract
A system for controlling fuel injection of an engine having a bypass around a throttle valve, and idle speed control valve provided in the bypass, and a fuel injector. A basic injection pulse width is decided in accordance with engine speed and throttle position of the throttle valve. The system has a detector detecting idling operation of the engine, for producing an idle signal, and a controller for producing a control value signal for controlling the idle speed control valve in accordance with engine speed upon the idle signal. The basic injection pulse width is corrected with a correction value relative to the control value signal.
Claims3
A system for controlling fuel injection of an engine for a motor vehicle having an intake passage, a throttle valve provided in the intake passage, a bypass around the throttle valve, an idle speed control valve provided in the bypass, and at least one fuel injector, comprising:
- an engine speed sensor producing an engine speed signal dependent on speed of the engine;
- a throttle position sensor producing a throttle opening degree signal dependent on an opening degree of the throttle valve;
- determining means for producing a basic injection pulse width signal in accordance with the engine speed signal and throttle opening degree signal;
- detector means for detecting idling operation of the engine and for producing an idle signal;
- control means responsive to the idle signal and the engine speed signal for producing a control value signal for controlling the idle speed control valve;
- and
- correcting means responsive to the control value signal for producing a correction value, and for correcting the basic injection pulse width signal with the correction value and for producing a fuel injection pulse width signal for operating the fuel injector.
Dependencies are inferred from the claim text.