| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control device for an engine capable of suppressing torque shock when returning to fuel injection after a fuel cut. <P>SOLUTION: The fuel injection control device for an engine includes a direct injection valve 2, a port injection valve 5, a fuel cut execution means 111, a return time fuel supply amount detection means 112 for determining a return time fuel supply amount necessary for suppressing torque shock occurring in the engine upon returning from the fuel cut within an allowable range, and an injection valve control means 113 for comparing the return time fuel supply amount with a direct injection minimum fuel injection amount that can be injected by the direct injection valve 2 and a port minimum fuel injection amount that can be injected by the port injection valve 5, and selecting and operating the direct injection valve 2 or the port injection valve 5 according to the comparison result. The injection valve control means 113, when the direct injection minimum fuel injection amount and the port minimum fuel injection amount are each equal to or less than the return time fuel supply amount, selects and operates the port injection valve 5 if engine rotation speed is equal to or less than predetermined rotation speed, or selects and operates the direct injection valve 2 if the engine rotation speed is higher than the predetermined rotation speed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
