Common rail fuel injection system

摘要

Disclosed is a common rail fuel injection system for a diesel internal combustion engine. The fuel injection system comprises first 601 and second fuel pumps 603 and a fuel injector 160 the pumps and fuel injector being linked by a common rail 606. A target injection amount based on a nominal fuel injection quantity and a correction amount is supplied by the first pump to the second pump which passes the fuel on to the fuel injector. The nominal fuel quantity is based on the engine operating point and the fuel correction value is based on a function of an index indicative of at least one among an injector static leakage, an injector dynamic leakage, a second pressure pump efficiency. The first pump may be a low pressure pump and the second pump may be a high pressure pump.