Homogeneous charge compression ignition internal combustion engine that performs EGR, and ignition timing control method for the engine

摘要

A combustion chamber of a homogeneous charge compression ignition internal combustion engine that performs EGR communicates with an intake passage and an exhaust passage. The combustion chamber is opened and closed to the intake passage with an intake valve, and is opened and closed to the exhaust passage with an exhaust valve. The closing timing of the exhaust valve in the exhaust stroke is advanced relative to the top dead center of the piston. A supercharger of a variable supercharging pressure type is located in the intake passage. This configuration expands the operational range of the engine to a higher load region.