| 摘要 |
PROBLEM TO BE SOLVED: To control a fuel injection quantity by more accurately estimating an intake air pressure. SOLUTION: In an internal combustion engine provided with a throttle valve actuator controlling an opening of a throttle valve, a control device for controlling a fuel injection quantity is provided with a means detecting an actual throttle opening TH of the throttle valve, and feedback-controls the detected actual throttle opening at a prescribed control cycle to converge it toward a target throttle opening THCMD with a prescribed time constantτp. An estimation value HTH of the throttle opening in a following control cycle is calculated by adding a value provided by multiplying a difference between the target throttle opening and the actual throttle opening by a prescribed gain C to the actual throttle opening. An estimation value HPB of intake pipe pressure is determined based on the estimation value of the throttle opening, and a fuel injection quantity is calculated based on the estimation value of intake pipe pressure. A gain is calculated based on the length of the control cycle and the time constant. COPYRIGHT: (C)2009,JPO&INPIT
|
