System and method for controlling ignition timing for an interna

Details System and method for controlling ignition timing for an interna System and method for controlling ignition timing for an interna

1986-10-22

1989-04-11

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

F02P 515

Patent

active

048196037

ABSTRACT:
A system and method for controlling an ignition timing for an internal combustion engine. In the ignition timing control system and method, with a retardation angle correction amount stored as a learning value according to an engine operating region, a newly learned learning value is used as the retardation angle correction amount so that an optimum retardation angle correction amount can be provided regardless of an individual difference in engine performance and of an operating environment. Consequently, an effective suppression of occurrence of engine knocking can be achieved and engine performance and fuel economy can be improved. In addition, since the updating of the learning value is inhibited only when an engine revolutional speed is increased, an opportunity of updating the learning value is increased so that the learning value can always be set at optimum.

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