Ignition timing control system for internal combustion engines

Details Ignition timing control system for internal combustion engines Ignition timing control system for internal combustion engines

1994-05-20

1996-04-02

Argenbright, Tony M.

Internal-combustion engines

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

F02P 515

Patent

active

055031269

ABSTRACT:
An ignition timing control system for an internal combustion engine includes a basic ignition timing calculating unit for calculating a basic ignition timing of the engine and a low limit ignition timing calculating unit for calculating a low limit ignition timing of the engine, both being calculated according to an operating state of the engine. The system includes a retardation angle calculating unit for calculating a retardation angle that is retarded from the basic ignition timing. It also includes an advance angle calculating unit for calculating an advance angle that is advanced from a value corresponding to the low limit ignition timing depending on whether knocking is occurring in the engine. An operating state predicting unit is included for predicting an operating state of the engine where knocking is likely to occur. The system also includes an ignition timing control unit for controlling the ignition timing separately depending on whether a knocking is likely to occur in the engine.

REFERENCES:
patent: 4694800 (1987-09-01), Morita
patent: 4711212 (1987-12-01), Haraguchi et al.

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