Knocking control system for internal combustion engines

Details Knocking control system for internal combustion engines Knocking control system for internal combustion engines

1989-10-10

1990-10-02

Wolfe, Willis R.

Internal-combustion engines

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

123 9016, F01L 134, F02D 1302, F02D 4300, F02P 515

Patent

active

049600940

ABSTRACT:
A knocking control system for an internal combustion engine with inlet valves and exhaust valves having valve timing thereof controlled depending on operating conditions of the engine. It is determined whether or not knocking has occurred in the engine on the basis of a detection parameter indicative of knocking and at least one discrimination parameter. The operation of the engine is controlled by the use of at least one control parameter in response to the determination result, so as to eleminate knocking. The values of the discrimination and control parameters are selected in accordance with the actual valve timing. When abnormality in the valve timing control is detected, the valve timing is held at predetermined valve timing irrespective of engine operating conditions, and values of the at least one discriminating parameter and the at least one control parameter are selected, which correspond to the held predetermined valve timing. Alternatively, when abnormality in the valve timing control is detected, the above control of the engine operation is inhibited.

REFERENCES:
patent: 4844022 (1989-07-01), Konno
patent: 4887561 (1989-12-01), Kishi

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