| 摘要 |
PURPOSE: To provide a fuel injection control device for a spark ignition internal combustion engine of cylinder injection type enabling the reduction of a shock at the time of a fuel cut as well as to give a moderate deceleration sense to a driver at the time of coasting driving. CONSTITUTION: ECU 70 judges whether or not the present mode is in an after injection mode when a driver return an accelerator pedal and a coasting driving is started. Then, if this judgment is yes, the ECU 70 compares a first valve opening time calculated from an intake air quantity and a target air-fuel ratio with a second opening time computed from a throttle aperture angle and an engine rotating speed, and after selecting the shorter time as a valve opening, the ECU 70 drives a fuel injection valve 4 based on the valve opening time. Thereby, even when bypass air is introduced into a combustion room 5 by ABV 27, an amount of fuel injections decreases so that a torque generated by an engine 1 is decreased if the throttle aperture angleθTH is small.
|
