Patent ID: 7895827
Filing Date: 2011-03-01
Classification: F01N,Y02T

Abstract:
1. Method for controlling operation of an internal combustion engine, comprising: monitoring in-cylinder pressure measurements; controlling a mass of post-injection fuel into a combustion chamber in response to an exhaust feedstream immediately upstream of an exhaust aftertreatment device to regenerate said exhaust aftertreatment device, wherein said controlling a mass of post-injection fuel raises exhaust feedstream temperature for said regeneration of said aftertreatment device; determining a torque error resulting from said controlling the mass of post-injection fuel into the combustion chamber based on the in-cylinder pressure measurements; and selectively controlling a mass of main fuel injection into each combustion chamber to maintain engine output torque in response to an operator torque request, said maintaining engine output torque comprising compensating for the torque error resulting from said controlling the mass of post-injection fuel into the combustion chamber.