Knock detector

Details Knock detector Knock detector

1981-02-12

1983-12-20

Gill, James J.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

044209673

ABSTRACT:
A comparator compares, either before or after being rectified, a signal obtained from the vibration signal representing the vibrations of a spark ignition internal combustion engine and which has passed through a signal transmitting circuit, with a reference level signal from a reference level signal forming circuit to produce a knock signal representing the occurrence of knocking when the former signal is greater in magnitude than the latter. The reference level signal forming circuit rectifies and smooths the vibration signal to produce a rectified smoothed signal, and includes a first amplifying circuit which amplifies the rectified smoothed signal to produce the reference level signal, mentioned above. When the engine speed is above a predetermined value, an engine speed determining circuit produces a drive signal to which a changeover circuit responds by changing the magnitude of at least one of the signal transmitting circuit and the reference level signal forming circuit from one value to another whereby possible knocking occurring in the overall range of higher and lower engine speeds is reliably detected for use in spark timing control in the spark ignition internal combustion engine.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4111035 (1978-09-01), West et al.
patent: 4233836 (1980-11-01), Yoneda et al.
patent: 4279143 (1981-07-01), Guipaud

Affiliated with

Also associated with

Rating

Knock detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Knock detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Knock detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-101974