| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the deterioration in combustion stability and exhaust performance when fuel supplied to a cylinder direct injection injector is not sufficiently boosted, in a spark ignition internal combustion engine including the cylinder direct injection injector and a port injection injector. <P>SOLUTION: In this fuel injection control device for the spark ignition internal combustion engine, injection control in starting is performed in starting so that compression stroke injection is performed by the cylinder direct injection injector after the fuel supplied to the cylinder direct injection injector is boosted to a reference pressure or more by a fuel booster, and injection control after starting is performed so that two fuel injections, that is, fuel injection by the port injection injector and compression stroke injection by the cylinder direct injection injector are performed after the operating condition of the internal combustion engine satisfies a predetermined condition. When a fuel pressure after lapse of a predetermined period from starting of pressure rising by the fuel booster in the injection control in starting does not reach the reference pressure, it is determined that pressure rising by the fuel booster is failure, and control is switched from the injection control in starting to the injection control after starting without depending on whether the operating condition of the internal combustion engine satisfies or not the predetermined condition. <P>COPYRIGHT: (C)2011,JPO&INPIT |
