Patent ID: 6536209
Filing Date: 2003-03-25
Classification: F01N,F02B,F02D,Y02T

Abstract:
A method of controlling the injection of fuel into combustion chambers of a direct injection compression ignition internal combustion engine comprising the steps of:determining whether activation of an exhaust treatment device is required based on at least one temperature related engine operating parameter, and if required, providing to at least one direct fuel injection device a fuel injection signal including a post fuel injection signal for producing a post fuel injection during a cylinder cycle of a corresponding one of the plurality of combustion chambers, whereby combustion of fuel injected in response to the fuel injection signal provides a predetermined quantity of heated exhaust gas for increasing exhaust treatment device efficiency; and dynamically determining at least one parameter of the post fuel injection signal provided to the at least one direct fuel injection device based on the at least one temperature related engine operating parameter, such that the post fuel injection does not produce substantial mechanical energy.