Air and fuel supply system for combustion engine operating in HCCI mode

摘要

An engine and a method of operating an internal combustion engine is provided. The method comprises supplying a pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston, and operating the engine in an HCCI combustion mode. In at least some embodiments, a mixture of pressurized air and recirculated exhaust gas is supplied from an intake manifold to an air intake port of a combustion chamber in the cylinder. In some embodiments, the method further comprises causing an exhaust stream of an engine to contact a NOx adsorber.