FUEL PRESSURE CONTROL DEVICE FOR ELECTRONICALLY CONTROLLED FUEL INJECTION TYPE INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To prevent the atomization of fuel injected from a fuel injection nozzle from being degraded in the low load region of an internal combustion engine at the time of controlling fuel pressure to the fuel injection nozzle according to intake pressure. CONSTITUTION:A pressure chamber 13b in a fuel pressure regulator 13 provided in relation to a fuel delivery pipe 9 to a fuel injection nozzle 8 is related to intake pressure on the downstream side of a throttle valve 4 in the idle or decelerating operation region of an internal combustion engine and related to atmospheric pressure in any other operating region.