Method of identifying the stroke positions in an internal combus

Details Method of identifying the stroke positions in an internal combus Method of identifying the stroke positions in an internal combus

1996-05-13

1997-03-25

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02D 700

Patent

active

056134738

ABSTRACT:
In a method of identifying stroke positions and for synchronizing sequential fuel or ignition distribution to cylinders of a four-stroke internal combustion engine with an even number of cylinders, as a function of signals of a crankshaft sensor, pistons of two cylinders each having the same position and direction of motion always form one group. Fuel injection and ignition is jointly carried out for each group from engine starting until a predetermined engine operating state is reached. Either fuel injection or ignition of a predetermined cylinder is omitted for at least one engine stroke, once the predetermined engine operating state is reached. If combustion does not occur within two engine cycles, beginning with the engine stroke in which the fuel injection or the ignition is omitted for the first time, the predetermined cylinder and otherwise the other cylinder of the same group is synchronized. A switch over to sequential fuel injection or ignition is carried out once synchronization has been carried out.

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