Patent ID: 6637394
Filing Date: 2003-10-28
Classification: F01L,F02D,F02N

Abstract:
An internal combustion engine composing:a plurality of combustion cylinders; a crankshaft; means for indicating rotational position and speed of the engine crankshaft; an exhaust valve for each combustion cylinder; an engine cranking system coupled to the crankshaft; an override valve controller for interrupting normal operation of the exhaust valves and opening the exhaust valves during compression strokes; and the override valve controller being responsive to initiation of the engine cranking system for opening the exhaust valves for the combustion cylinders during compression strokes as indicated by the rotational position of the crankshaft and being further responsive to engine speed reaching a first threshold for allowing the exhaust valve for a first combustion cylinder to operate in synchronous with the crankshaft to support compression ignition in the cylinder while continuing to open the exhaust valves for at least one of the of remaining combustion cylinders during compression strokes.