Ignition control system with cylinder identification evaluation

Details Ignition control system with cylinder identification evaluation Ignition control system with cylinder identification evaluation

1991-08-28

1993-02-16

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123612, 123643, F02P 7077

Patent

active

051861445

ABSTRACT:
Continued improper and erroneous ignition control resulting from misidentification of reference positions of the cylinders of an internal combustion engine can be prevented in an effective manner. A signal generator generates a reference signal SGT representative of at least one predetermined reference crank angle of each cylinder and a cylinder identification signal SGC. The at least one reference crank angle of each cylinder is successively identified on the basis of the reference signal and the cylinder identification signal. It is evaluated whether the identification of the cylinder reference position is correct. Then, ignition control is performed based on the result of the evaluation. More specifically, ignition control is performed in a timer controlled manner if the cyinder identification is correct. If the cylinder identification is incorrect, it is determined whether an ignition control timing such as the timing for starting the power supply to an ignition coil is earlier than a first reference position. If so, the power supply to the ignition coil is started at the first reference position without using timer control. Contrarily, if not, the power supply is started at a time point after a predetermined time from the first reference position in a timer controlled manner.

REFERENCES:
patent: 4690123 (1987-09-01), Kimura et al.
patent: 4711227 (1987-12-01), Li et al.
patent: 4726347 (1988-02-01), Sasaki et al.
patent: 4979487 (1990-12-01), Fukui

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