CAM SENSOR ELIMINATION IN COMPRESSION-IGNITION ENGINES

摘要

A method for controlling start of a compression ignition engine (10) having a plurality of cylinders without a cam sensor is provided. The method comprise s providing a respective fuel delivery assembly (30) for each cylinder. In one embodiment the method further comprises retrieving (from memory a set of fue l delivery assembly firing rules and then processing the firing rules so that a firing signal is delivered to each fuel delivery assembly on every crank revolution during a cranking mode of operation. The fuel delivery assembly i s arranged to be responsive to any firing signal received during an injection window leading to the top position along the longitudinal axis so as to supp ly fuel to each cylinder during that injection window. The fuel delivery assemb ly is further arranged to be insensitive to any firing signal received during a n exhaust stroke so that no fuel is delivered to each cylinder during that exhaust stroke.