Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1989-10-13
1991-04-30
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123422, F02P 515
Patent
active
050108646
ABSTRACT:
An ignition timing control apparatus for a multi-cylinder internal combustion engine has a position sensor for generating a series of position signals. Each signal corresponds to one of the cylinders of the engine and indicates a first position and a second position with respect to top dead center of the piston of the corresponding cylinder. The number of degrees of crankshaft rotation between the first and second positions is different for a prescribed reference cylinder of the engine than for the other cylinders of the engine. A cylinder recognizing portion of a microcomputer recognizes the reference cylinder based on the signal from the position sensor. An ignition timing braking portion of the microcomputer performs ignition timing braking when the target ignition timing falls during a prescribed braking period and ignition has yet to take place when a piston reaches its second position. A braking period adjusting portion adjusts the length of the braking period depending on which cylinder is firing and on whether cylinder recognition has been completed.
REFERENCES:
patent: 4656993 (1987-04-01), Yuzawa et al.
patent: 4700305 (1987-10-01), Lotterbach et al.
Fukui Wataru
Matsuoka Atsuko
Dolinar Andrew M.
Mitsubishi Denki & Kabushiki Kaisha
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