Fuel injection control system

A fuel injection control system for a vehicle with an automatic engine stopping and starting system mounted thereon for automatically stopping an engine in response to a predetermined vehicle stopping condition and thereafter restarting the engine in response to a predetermined vehicle starting operation, the fuel injection control system comprising:

• a throttle sensor for detecting the throttle opening,
• engine start judging means for starting the engine in response to a throttle opening operation during automatic stoppage of the engine,
• basic injection amount calculating means for calculating a basic fuel injection amount on the basis of predetermined engine parameters,
• injection amount decreasing means for decreasing the fuel injection amount at the time of starting the engine, and
• injection amount decrease prohibition means for prohibiting decrease of the fuel injection amount at the time of starting the engine from an automatic stoppage state of the engine.

A method for controlling the injection amount of a fuel supplied to an engine attached to a vehicle having an automatic engine stopping and starting system, comprising:

• sensing throttle opening;
• sensing pre-determined conditions;
• calculating a basic fuel injection amount;
• determining the stoppage state of the engine;
• and
• adjusting the basic fuel injection amount at the time of starting the engine from the automatic stoppage state of the engine, based on throttle opening.