| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit operation from being performed at a lean air-fuel ratio with an actual fuel injection quantity becoming shorter than a demand even in the case of a failure of a fuel pressure sensor. <P>SOLUTION: An engine fuel supply device determines a duty ratio for controlling the energization of a fuel pump on the basis of fuel pressure detected by a fuel pressure sensor and a target value. The engine fuel supply device fixes the duty ratio of the fuel pump at a value equivalent to the target value when the fuel pressure sensor has an abnormality, and cuts fuel or limits the opening degree of a throttle valve in a range where a fuel supply quantity potentially becomes short when driving the fuel pump at the duty ratio equivalent to the target value. <P>COPYRIGHT: (C)2013,JPO&INPIT |
