Patent ID: 6868826
Filing Date: 2005-03-22
Classification: F02D,F02M

Abstract:
1. A fuel pressure control apparatus of an internal combustion engine, comprising: a fuel injection valve for injecting fuel into a combustion chamber of the internal combustion engine; an accumulator for accumulating high-pressure fuel and for supplying fuel to the fuel injection valve; a fuel pump for supplying the high-pressure fuel to the accumulator; a fuel pressure sensor for detecting a fuel pressure in the accumulator; idling detecting means for detecting, on the basis of an accelerator manipulation, whether the internal combustion engine is in an idling state; control means for controlling an amount of fuel that is supplied from the fuel pump to the accumulator so that the fuel pressure in the accumulator that is detected by the fuel pressure sensor coincides with a target fuel pressure that is set in accordance with a rotation speed and a load of the internal combustion engine; and target fuel pressure switching means for restricting the target fuel pressure to a prescribed fuel pressure or lower while the idling detecting means detects that the internal combustion engine is in an idling state.