Knock sensing apparatus for internal combustion engine

Details Knock sensing apparatus for internal combustion engine Knock sensing apparatus for internal combustion engine

1994-11-29

1996-06-04

Chilcot, Richard

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

731173, G01L 2322

Patent

active

055222544

ABSTRACT:
A knock sensing apparatus for an internal combustion engine which can detect a failure in a knock sensor signal system correctly even when a changeover operation due to hardware is performed at a place between a knock sensor and a band pass filter. In this knock sensing apparatus, the failure detection by a failure detecting circuit for detecting a failure in a signal system from knock sensors is invalidated for a predetermined period after one of the knock sensors has been changed over to the other knock sensor, or one of two kinds of pass bands of a band pass filter has been changed over to the other pass band, to prevent a decrease in failure detection accuracy due to the signal delaying action of the switched capacitor filter.

REFERENCES:
patent: 4345558 (1982-08-01), Yamaguchi et al.
patent: 4418567 (1983-12-01), Boning et al.
patent: 4483180 (1984-11-01), Ohbuchi et al.
patent: 4499877 (1985-02-01), Iwata
patent: 4599982 (1986-07-01), Sugiura
patent: 4750103 (1988-06-01), Abo et al.
patent: 5119783 (1992-06-01), Komurasaki
patent: 5373448 (1994-12-01), Katogi et al.
patent: 5408863 (1995-04-01), Sawyers et al.

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