Patent ID: 6571776
Filing Date: 2003-06-03
Classification: F02B,F02D,F02F

Abstract:
A method for controlling start of a compression ignition engine without a cam sensor, the engine having a plurality of cylinders, each cylinder including a respective piston reciprocally movable between respective top and bottom positions along a cylinder longitudinal axis, the method comprising:providing a respective fuel delivery assembly for each cylinder; retrieving from memory a set of fuel delivery assembly firing rules; 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; arranging the fuel delivery assembly to be responsive to any firing signal received during an injection window so as to supply fuel to each cylinder during that injection window; arranging the fuel delivery assembly to be insensitive to any firing signal received outside the firing window so that no fuel is delivered to each cylinder outside that firing window; switching to a new set of firing rules upon reaching a predefined engine RPM; and processing the new set of firing rules so that a firing signal is delivered to each fuel delivery assembly on every other crank revolution assuming a cam indication corresponding to a compression stroke.