FUEL SUPPLY DEVICE OF ENGINE

PROBLEM TO BE SOLVED: To execute stable stratified charge combustion on starting an engine. SOLUTION: In the direct injection four-cylinder engine, on starting the engine, the fuel supply device determines whether a rise timing of an REF signal of this time is of a second cylinder or a third cylinder by a S11. If the rise timing is of the second cylinder or the third cylinder, it is determined that a fuel pressure will rise from a rise timing of the REF signal by a fuel injection timing, this fuel pressure rise quantity ΔP is calculated by an S12 and then an S13 is executed. On the other hand, if the REF signal in the S11 is of a first cylinder or a fourth cylinder, ΔP=0 is set in the S22 and the S13 is executed. In the S13, a fuel pressure lowering quantity Δpl owing to fuel leakage in a high pressure fuel pump is calculated. In a following step S14, correction of subtracting the Δpl from sum of an actual fuel pressure Pr at the rising timing of the REF signal and the ΔP is preformed to calculate a fuel pressure estimation value Pestat a fuel injection timing. Then, when the Pestexceeds an injection allowable fuel pressure, a compression stroke injection is allowed. COPYRIGHT: (C)2009,JPO&INPIT