System and method for detecting and determining knocking in an i

Details System and method for detecting and determining knocking in an i System and method for detecting and determining knocking in an i

1988-09-22

1990-02-13

Wolfe, Willis R.

Internal-combustion engines

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

123435, F02P 514

Patent

active

048997102

ABSTRACT:
A system and method for detecting and determining knocking in an internal combustion engine in which various kinds of signals (engine vibrations, engine revolution speed, opening angle of a throttle valve, crank angle, ignition crank angle, and so on) are weighted by means of weight vectors so as to form a knocking decision signal. The knocking decision signal is compared with a reference signal so as to determine whether the knocking is occuring. The correctness or incorrectness of the determination result is determined on the basis of a highly accurate knocking detecting information provided by means of an external test device. The weight vectors are corrected in a direction in which the percentage of correct answers increases under the various engine operating conditions. The weight vectors thus corrected and learned are used to carry out highly accurate knocking detection under varying engine operating conditions. The process can be repeated as a part of normal servicing so as to compensate for the effects of aging.

REFERENCES:
patent: 4312214 (1982-01-01), Kramer et al.
patent: 4344400 (1982-08-01), Asano
patent: 4391126 (1983-07-01), van Zanten
patent: 4425891 (1984-01-01), Kashimura et al.
patent: 4463722 (1984-08-01), Kobayashi
patent: 4478068 (1984-10-01), Bonitz et al.
patent: 4593553 (1986-06-01), Bonitz et al.

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