| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel supply control device that prevents erroneous determination of follow-up failure of common rail pressure. <P>SOLUTION: A fuel pressure control device increments a follow-up failure counter (S410) when there is no occurrence of fuel leaking abnormality (S402: No), the engine operation state is a normal state (S404: Yes), deviation between an actual fuel pressure and a target fuel pressure is a prescribed value or more (S406: Yes), and an integration term of feedback control reaches a limit value (S408: Yes). When the follow-up failure counter is 0, follow-up failure determination processing is thereby started. When the follow-up failure counter becomes a prescribed value or more (S412: Yes), the fuel pressure control device determines that even when feedback control is executed in the state of the integration term reaching the limit value, the deviation between the actual pressure and the target pressure does not become less than the prescribed value, and therefore, there is follow-up failure of common rail pressure in which the actual fuel pressure does not follow the target fuel pressure (S414). <P>COPYRIGHT: (C)2010,JPO&INPIT |
