Knock control system for internal combustion engine

Details Knock control system for internal combustion engine Knock control system for internal combustion engine

2005-09-20

2005-09-20

Argenbright, Tony M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S406290, C123S406340, C123S406360

Reexamination Certificate

active

06947828

ABSTRACT:
A knock control system for an internal combustion engine having a plurality of cylinders. Operation of the engine is switchable between a partial-cylinder operation for operating some of the cylinders and an all-cylinder operation for operating all of the cylinders. A determination threshold for determining knocking is set according to an output signal from the knock sensor. A level of the output signal from the knock sensor is compared with the determination threshold, and occurrence of knocking is determined according to a result of the comparison. The determination threshold used during the partial-cylinder operation is set to a value less than a value of the determination threshold used during the all-cylinder operation.

REFERENCES:
patent: 5140962 (1992-08-01), Iwata
patent: 5481461 (1996-01-01), Miyamoto et al.
patent: 6279536 (2001-08-01), Brielbeck et al.
patent: 6456927 (2002-09-01), Frankowski et al.
patent: 2844418 (1998-10-01), None

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