Patent ID: 7290524
Filing Date: 2007-11-06
Classification: F02B,F02D,Y02T

Abstract:
1. A control apparatus for a four-stroke premixed compression ignition internal combustion engine, the control apparatus comprising: an intake-valve control portion that opens an intake valve at an intake-valve opening timing so that the intake valve is open during at least a portion of an intake stroke, and that closes the intake valve at an intake-valve closing timing; and an exhaust-valve control portion that includes a first exhaust-valve control portion and a second exhaust-control portion, wherein: the first exhaust-valve control portion opens an exhaust valve at a first exhaust-valve opening timing so that the exhaust valve is open during a portion of an exhaust stroke, and the first exhaust-valve control portion closes the exhaust valve, at a first exhaust-valve closing timing that is near an exhaust top dead center; the second exhaust-valve control portion opens the exhaust valve at a second exhaust-valve opening timing that is retarded with respect to the first exhaust-valve closing timing and the intake-valve opening timing, and is advanced with respect to the intake-valve closing timing, and the second exhaust-valve control portion closes the exhaust valve, at a second exhaust-valve closing timing, and