Method and apparatus for detecting engine knock in an internal c

Details Method and apparatus for detecting engine knock in an internal c Method and apparatus for detecting engine knock in an internal c

1981-05-28

1983-07-05

Gill, James J.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

043911269

ABSTRACT:
The output signal of a mechanical engine knock sensor is supplied to two similar treatment branches through different input filters, one, for the main signal, which passes frequencies at which engine knock signals are known to occur and for a reference signal by a filter which passes only frequencies likely to contain few or no components of knock signals. If both signals show a sharp of rise occurring at the same time or with less than a predetermined time offset, the peak value of each signal is stored and utilized to weight inversely the amplification of the signal value during the declining phase following the peak. It has been discovered that engine knock signals fall off more slowly from a peak than other motor noises. Consequently, when the weighted signals are compared and show a consistent difference exceeding a predetermined threshold, an engine knock detection signal is produced.

REFERENCES:
patent: 3540262 (1970-11-01), Wostl et al.
patent: 4012942 (1977-03-01), Harned
patent: 4276861 (1981-07-01), Kearney et al.

Affiliated with

Also associated with

Rating

Method and apparatus for detecting engine knock in an internal c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting engine knock in an internal c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting engine knock in an internal c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1434339