COMPRESSION IGNITION TYPE INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To favorably emit SOX from NOX absorbent. SOLUTION: A first combustion in which a recirculation exhaust gas amount fed to a combustion chamber 5 is more than the recirculation exhaust gas amount where the soot generation rate becomes the peak and a second combustion in which the recirculation exhaust gas amount fed to a combustion chamber 5 is less than the recirculation exhaust gas amount where the soot generation rate becomes the peak are selectively switched. A particulate filter 24 carrying the NO absorbent is disposed in an engine exhaust passage, and when SOX is to be emitted from the NOX absorbent and if there is enough electric energy to be stored in a battery 41, the first combustion is executed, even when the second combustion is to be performed, so that the lowering of the output torque of the engine is compensated by the output torque of an electric motor 37 to make the air-fuel ratio rich.