Knocking state determination device

Measuring and testing – Engine detonation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C073S035040, C123S406380

Reexamination Certificate

active

11475231

ABSTRACT:
An engine ECU executes a program including a step of calculating intensity values LOG(V) based on signals transmitted from a knock sensor; a step of deciding a maximum value V(MAX) in frequency distribution of intensity values LOG(V) for N cycles (N is a natural number); a step of calculating a knock determination level V(KD) based on the frequency distribution; a step of, when the knock determination level V(KD) is smaller than the maximum value V(MAX), removing V(MAX) from the frequency distribution; and a step of counting the total frequency of removed maximum values V(MAX) as knock occupancy KC. Maximum values V(MAX) are removed until the knock determination level V(KD) and the maximum value V(MAX) coincide, and the knock determination level V(KD) is recalculated.

REFERENCES:
patent: 4993387 (1991-02-01), Sakakibara et al.
patent: 5134980 (1992-08-01), Sakakibara et al.
patent: 5215058 (1993-06-01), Sakakibara et al.
patent: 5355853 (1994-10-01), Yamada et al.
patent: 6688286 (2004-02-01), Kokubo et al.
patent: 6845312 (2005-01-01), Cross et al.
patent: 6867691 (2005-03-01), Nishimura
patent: 2002/0179053 (2002-12-01), Kokubo et al.
patent: 2003/0005749 (2003-01-01), Nishimura
patent: 0 346 799 (1989-12-01), None
patent: 1-315649 (1989-12-01), None
patent: 2001-227400 (2001-08-01), None
patent: 2003-21032 (2003-01-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Knocking state determination device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-3936282

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.