Method and apparatus for recognizing a faulty combustion in an i

Details Method and apparatus for recognizing a faulty combustion in an i Method and apparatus for recognizing a faulty combustion in an i

1990-07-23

1991-04-09

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123435, 123417, 123425, F02P 514

Patent

active

050055496

ABSTRACT:
A sensor signal from a sensor which measures vibration of an internal combustion engine is filtered by a filter to provide characteristic frequency components for a normal combustion. When the filter signal remains below a reference value, a fault signal is output to indicate a faulty combustion. The filter may be switchable band-pass filters whose output signals are measured for knocking of the motor or for normal combustion. A programmed control unit evaluates the output signals from the filter within a characteristic time segment.

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