| 摘要 |
PURPOSE:To accurately control air-fuel ratio of an engine when it is accelerated, by providing a procedure to obtain a differentiated value of intake pipe pressure, procedure to obtain a rapid acceleration decision value and a procedure to excute asynchronous injection. CONSTITUTION:At acceleration of an engine when an electronic control unit (ECU) 40 controls asynchronous injection, a procedure to obtain a differentiated value of intake pipe pressure, a procedure to obtain a rapid acceleration decision value increased larger at a low speed of the engine, a procedure to decide whether or not the differentiated value of the intake pipe pressure exceeds the rapid acceleration decision value and a procedure to execute the asynchronous injection when the differentiated value of the intake pipe pressure exceeds the rapid acceleration decision value are provided. The rapid acceleration decision value is set so as to be increased at the low speed of the engine. In this way, gentle acceleration of the engine when it is rotated at a low speed is never wrongly decided to be rapid acceleration. In such way, air-fuel ratio of the engine when it is accelerated can be accurately controlled. |
