Knock determination apparatus and method for engines

Details Knock determination apparatus and method for engines Knock determination apparatus and method for engines

2008-04-08

2008-04-08

Wolfe, Willis R. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S035090, C123S406340

Reexamination Certificate

active

11521379

ABSTRACT:
In determining a knock of an engine, a vibration intensity is calculated by logarithm-transforming a peak value or an integral value of an output signal of a knock sensor. Further, a central value VMED of a vibration intensity distribution is calculated, and also a standard deviation σ in a region where the vibration intensity is smaller than this central value VMED is calculated. A vibration intensity reference value VIB is calculated as VMED−u×σ, thereby setting the vibration intensity reference value VIB to be close to a minimum of the vibration intensity distribution. Further, a knock reference value KCK is set by adding a predetermined value K to the vibration intensity reference value VIB. The vibration intensity detected by the knock sensor is compared with the knock reference value KCK to determine presence/absence of a knocking.

REFERENCES:
patent: 4777920 (1988-10-01), Oshiage et al.
patent: 4899711 (1990-02-01), Tabara et al.
patent: 4993387 (1991-02-01), Sakakibara et al.
patent: 5188080 (1993-02-01), Sakakibara et al.
patent: 7263430 (2007-08-01), Kasashima et al.
patent: 1416156 (2004-05-01), None
patent: 2721657 (1995-12-01), None

Affiliated with

Also associated with

Rating

Knock determination apparatus and method for engines 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 determination apparatus and method for engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Knock determination apparatus and method for engines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3946865