Engine control system
AssigneesHitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
InventorsShigenori Hosowari, Takashi Shiraishi
Life of this patent
Estimating the term…
Abstract
An engine control system comprises a fuel injection valve, a plate disposed in an air intake passage so as to move according to the intake air flow rate, a fuel distributor including the above-mentioned plate and mechanically controlling fuel flow rate to the fuel injection valve on the basis of the movement of the plate, and an actuator connected to the fuel distributor for increasing or decreasing fuel flow rate to the fuel injection valve, and is characterized in that the engine control system comprises acceleration fuel increment means for incrementing fuel flow rate, to the fuel injection valve from the fuel distributor, necessary to accelerate the engine after detection of acceleration through a control of the actuator.
Claims11
An engine control system comprising a fuel injection valve for supplying fuel into the engine, a fuel distributor, including a plate disposed in an air intake passage so as to be movable in accordance with an intake air flow rate, for controlling a fuel supply rate from said fuel injection valve to an engine cylinder according to the movement of said plate, an actuator for controlling the fuel supply rate from said fuel distributor to said fuel control valve, acceleration detecting means for detecting acceleration of the engine, and means for operating said actuator so as to increase a fuel supply rate from said fuel distributor to said fuel injection valve and for delaying ignition timing by a predetermined angle immediately after detection of acceleration of the engine, and for thereafter gradually restoring the delayed ignition timing in a non-linear manner.
A method of controlling an internal combustion engine, wherein fuel is injected into the engine by mechanically controlling a fuel injection amount in response to a suction air flow, and wherein acceleration shock is reduced by incrementing said fuel injection amount by a fuel incrementation amount for acceleration at a time of detection of the acceleration, with an ignition timing being delayed for a certain time, when the acceleration takes place from an idle state in which a throttle valve is fully closed, said method comprising the steps of:
- detecting a duration of time during which the engine operates in the idle state prior to acceleration;
- and
- correcting said fuel incrementation amount for the acceleration according to the detected duration of time during which the engine operates in the idle state prior to acceleration, said fuel incrementation amount being increased in a stepwise manner at the time of detection of acceleration immediately following said duration of time in which the engine is in the idle state and being decreased gradually thereafter.
A method of controlling an internal combustion engine provided with a mechanical fuel injection control apparatus, comprising the steps of:
- controlling a fuel injection amount in response to the movement of a plate disposed in a suction air flow channel, reducing acceleration shock by increasing the fuel injection amount by an incremented amount for acceleration while retarding ignition timing at a time of detection of acceleration taking place from an idle state in which a throttle valve is fully closed, detecting a duration of time during which the engine operates in the idle state prior to acceleration, and correcting said incremented amount for the acceleration according to the length of said duration of time during which the engine operates in the idle state prior to acceleration.
Dependencies are inferred from the claim text.