Engine fuel delivery system

摘要

An engine fuel delivery system is provided to raise the fuel pressure rapidly in the initial stage of engine starting without increasing the cranking load, thereby making it possible to achieve an atomized fuel spray through high-pressure fuel injection, improve the fuel efficiency, and reduce emissions. The engine fuel delivery system uses a variable transmission mechanism that is configured to change the drive rotational ratio of a power transmission path between a crankshaft of an engine and a high-pressure fuel pump. The variable transmission mechanism controls the rotational speed of the high-pressure fuel pump to a rotational speed that is higher than the normal pump rotational speed in the initial stage of engine starting after the engine has been cranked to complete explosion.