Patent ID: 6715470
Filing Date: 2004-04-06
Classification: F02D

Abstract:
A fuel supply device for an internal combustion engine, comprising:target fuel pressure computing means for computing a target fuel pressure based on an operating state of the internal combustion engine; fuel pressure detecting means for detecting actual fuel pressure; injector injection quantity computing means for computing an injection quantity by an injector; feed forward quantity computing means for computing as a feed forward quantity a pump discharge quantity calculated in accordance with an amount of change in the target fuel pressure that is computed by the target fuel pressure computing means; feedback correction quantity computing means for computing a feedback correction quantity based on the target fuel pressure and on the actual fuel pressure detected by the fuel pressure detecting means; and fuel pressure controlling means for controlling fuel pressure by controlling an angle of a spill valve based on the feed forward quantity, the injector injection quantity, and the feedback correction quantity, wherein the computation of the feedback correction quantity by the feedback correction quantity computing means is stopped when the feed forward quantity is not within a given range.