| 摘要 |
PURPOSE:To reduce the number of cylinders whose ignition plugs are subjected to direct attack of fuel even if synchronized injection in all cylinders is performed by advancing the injection timing from the ignition timing in an operating range which involves the problem of incomplete firing of the ignition plugs. CONSTITUTION:At a step 110, it is discriminated whether the engine condition is in the operating range which involves the problem of incomplete firing of ignition plugs or not. If YES, at a step 112 it is discriminated whether the varied quantity of sucked air per one revolution of the engine, DELTAQ/N is over a specified value or not. If YES at both the steps 110 and 112, the engine condition shows that it stands in the range which involves the problem of incomplete firing of the ignition plugs. At the next step 113, fuel is injected at a timing which advances from an ignition timing thetaig by (gamma) of a crank angle. The number of the cylinders whose ignition plugs are subjected to direct attack of fuel can be thus reduced. |
