| 摘要 |
<P>PROBLEM TO BE SOLVED: To sufficiently reduce electric power consumption, by stably providing high pressure drop responsiveness, in a fuel supply control device for variably setting target fuel pressure. <P>SOLUTION: In an ordinary mode, feedback control is performed for determining driving duty DUTY of a fuel pump so as to approach fuel pressure FUPR to the target fuel pressure TGFUPR (S109). In such a feedback control, when the fuel pressure FUPR becomes higher by a first determining threshold value SL1 or more than the target fuel pressure TGFUPR, a mode is transferred to a pressure drop mode, and the fuel pump is stopped by changing the driving duty DUTY to 0% (S103→S104→S107). When FUPR-TGFUPR≤SL2 is satisfied by stopping the fuel pump, the mode is returned to the ordinary mode (S106→S108→S109). <P>COPYRIGHT: (C)2012,JPO&INPIT |
