Knock suppression apparatus and method for a multi-cylinder inte

Details Knock suppression apparatus and method for a multi-cylinder inte Knock suppression apparatus and method for a multi-cylinder inte

1991-07-17

1992-09-08

Wolfe, Willis R.

Internal-combustion engines

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

F02P 514

Patent

active

051449293

ABSTRACT:
A knock suppression apparatus and method for a multi-cylinder internal combustion engine can perform knock determination for each cylinder, and selectively prevent such knock suppression control from being reflected or performed on a cylinder for which knock determination is determined to be erroneous due to the influences of noise, thereby avoiding resultant reduction in the engine control efficiency. A plurality of knock sensors are provided each of which senses vibrations of a corresponding cylinder to generate a corresponding output signal. A knock determiner generates a knock determining signal if it is determined, based on the output signals of the knock sensors, that there is knocking in a cylinder. A controller controls engine operating parameters in a direction to suppress knocking in the cylinder based on the knock determining signal. A noise determiner determines whether the knock determining signal for each cylinder is erroneous due to noise, and generates a noise determining signal if the knock determining signal is erroneous. A knock control inhibiter inhibits knock suppression control based on the knock determining signal on a cylinder for which a noise determining signal is generated.

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patent: 5038735 (1991-08-01), Hosoya et al.
patent: 5054448 (1991-10-01), Matsuoka et al.

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