Patent ID: 8306723
Filing Date: 2012-11-06
Classification: F02D,Y02T

Abstract:
1. A method to operate a direct-injection compression ignition multi-cylinder internal combustion engine, comprising: operating the engine under a predetermined condition comprising a fuel cut-off mode; controlling fuel pressure to a predetermined pressure level; actuating a fuel injector for a first cylinder during each cylinder event at pulsewidths adjusted from a nominal minimum pulsewidth and monitoring a combustion parameter for the first cylinder, wherein actuating the fuel injector for the first cylinder during each cylinder event at pulsewidths adjusted from the nominal minimum pulsewidth comprises, detecting a discernable change in the state of the combustion parameter in the first cylinder and determining a corresponding pulsewidth; and adjusting the nominal minimum pulsewidth to the pulsewidth corresponding to the discernable change in the state of the combustion parameter in the first cylinder.