Patent ID: 7594390
Filing Date: 2009-09-29
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. A combustion control method for an internal combustion engine, the engine comprising an exhaust gas purifying section disposed in an exhaust system of the engine, the method comprising: determining, on the basis of a state of the exhaust gas purifying section, whether a request is issued to switch a combustion mode of the engine to a predetermined fuel combustion mode in which a preliminary fuel combustion is carried out at a compression stroke top dead center so as to increase an in-cylinder temperature at the compression stroke top dead center and a main fuel combustion to develop a main engine torque is started after (i) a complete end of the preliminary fuel combustion and (ii) a period of time after the complete end of the preliminary fuel combustion; and switching the combustion mode of the engine to the predetermined fuel combustion mode when determining that the request to switch the combustion mode to the predetermined fuel combustion mode is issued and during a transient driving state of the engine.