Method and system for controlling engine ignition timing

Details Method and system for controlling engine ignition timing Method and system for controlling engine ignition timing

2005-05-31

2005-05-31

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406530, C123S406550

Reexamination Certificate

active

06899082

ABSTRACT:
The ignition timing control system for an internal combustion engine includes an ignition device and a control unit. The control unit is programmed to execute steps including: determining if a predetermined condition for ignition timing retardation control; calculating a basic ignition timing value based on a knocking learning value, an engine speed, an intake air pressure, and an intake air temperature, if it is determined that the predetermined condition exists; calculating an ignition timing retardation value based on engine speed and intake air pressure; calculating an ignition timing retardation coefficient based on engine coolant temperature; calculating a final ignition timing value based on the basic ignition timing value, the ignition timing retardation value, and the ignition retardation coefficient; and controlling ignition timing according to the final ignition timing value.

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