| 摘要 |
PURPOSE:To improve the accelerating performance of an engine and to purify the exhaust gas of the same, by storing a plurality of groups of base fuel quantity according to parameters relating to particular conditions of engine operation, and reading out a base fuel quantity that differs depending on whether the engine is operated with its throttle valve being fully. CONSTITUTION:In an engine control unit (ECU) 5, which controls operation of a fuel injection valve 4 according to the conditions of engine operation detected from the output signals of means such as a sensor 9 for detecting the absolute pressure in an intake pipe, a water-temperature sensor 11 and an engine-speed sensor 12 for detecting parameters representing the conditions of engine operation, a base injection period is calculated at first in calculating the valve opening period of the fuel injection valve 4. The base injection period is read out, according to the engine speed and the absolute pressure in the intake pipe, from either of a base map or a map selected through detection of whether the engine is operated with its throttle valve being fully opened, and a required valve opening period is obtained by correcting the base injection period by use of parameters such as the temperature of engine cooling water. |
