Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1989-10-04
1990-10-02
Wolfe, Willis R.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
123 9016, F02D 1302, F02D 4300, F01L 134, F02P 515
Patent
active
049600958
ABSTRACT:
A knocking control system for an internal combustion engine with the 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. The values of the discrimination and control parameters arfe selected in accordance with the actual valve timing. The detection parameter is a level of vibration of the engine comprising a noise component and a knocking component. It is determined that knocking has occurred when the level of the knocking component is higher than one knocking discrimination level set based on the level of the noise component and the discrimination parameter irrespective of the actual valve timing. The discrimination parameter includes correction terms set to such values as to obtain the one knocking discrimination level, by being multiplied by and added to the level of the noise component, respectively.
REFERENCES:
patent: 4844022 (1989-07-01), Konno
patent: 4887561 (1989-12-01), Kishi
Koike Yuzuru
Yahata Tsao
Honda Giken Kogyo Kabushiki Kaisha
Wolfe Willis R.
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