| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the discharge amount of HC by preventing injected fuel from being attached on a discharge-side wall surface of a cylinder. <P>SOLUTION: A fuel injection valve 24 and a TVC 32 are provided on the upper wall surface 18A of an air intake port 18. The TCV 32 is placed between the fuel injection valve 24 and an air intake valve 28. An ECU 50 switches a control process based on a fuel injection amount when cold stating is carried out. That is, when a fuel injection amount is at a predetermined determination value or smaller, intake synchronous fuel injection is carried out after driving the TCV 32 to be closed. On the other hand, when a fuel injection amount is at larger than the determination value, the TCV 32 is driven to be closed after intake asynchronous fuel injection is carried out. By this, the amount of fuel attached on the discharge-side wall surface 14B in the cylinder can be reduced corresponding to each situation at the time of cold stating, thus resulting in the suppressed discharge amount of HC. <P>COPYRIGHT: (C)2012,JPO&INPIT |
