| 摘要 |
PURPOSE:To sharply reduce the amount of NOX emission in time of acceleration, by finding a preset compensation value according to a variation in car speed, while compensating the valve opening time of an injector as much as a portion for the said compensation value in time of non-idling. CONSTITUTION:In time of car driving, a car speed signal out of a car speed sensor 24 is inputted into an engine control unit 44 and the analog-to-digital conversion value is stored in memory. And, subtraction between both this time and the last stored values takes place, finding a variation DELTAV in car speed, and according to the variation DELTAV, a fuel increment value is read out of the specified map. On the other hand, according to each output of a suction pipe pressure sensor 22 and a crank angle sensor 36, calculating injection time Tp is found, while in time of judging a state that an idle switch is off and a throttle valve 16 comes into being not fully closed, it is set down to a new calculating injection time Tp in multiplying the calculating injection time Tp and the said fuel increment value together. Next, according to operating injection time T secured upon compensating this newly set calculating injection time Tp on the basis of suction temperature, cooling water temperature, etc., an injector 26 is controlled. |
