Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1991-08-22
1994-02-22
Nelli, Raymond A.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
F02P 514
Patent
active
052878376
ABSTRACT:
A knock suppressing apparatus for an internal combustion engine includes: a knock sensor for sensing the vibrations of an engine and generating a corresponding output signal; an interface circuit for generating a vibration level based on the output signal of the knock sensor; a noise level detector for generating a noise level based on the vibration level; a memory for storing a basic noise level, a basic threshold level and a correction value in relation to the number of revolutions per minute of the engine; a calculator for updating the correction value based on the noise level, the basic noise level and a current engine operating condition, and generating a corrected threshold for knock determination based on the basic threshold and the updated correction value; a knock determiner for making a comparison between the vibration level and the corrected threshold and generating a knock determination signal if the vibration level exceeds the corrected threshold; and a controller for controlling, based on the knock determination signal from the knock determiner, an engine control parameter in a direction to suppress knocking. A condition determiner may be further provided for determining whether the engine is in a predetermined operating range suitable for updating the correction value. In this case, the calculator updates the correction value and generates the corrected threshold if the engine is in the predetermined operating range.
REFERENCES:
patent: 4711212 (1987-12-01), Haraguchi et al.
patent: 4766545 (1988-08-01), Nagai
patent: 5109820 (1992-05-01), Iwata et al.
patent: 5121729 (1992-06-01), Hashimoto et al.
patent: 5131368 (1992-07-01), Komurasak
patent: 5140962 (1992-08-01), Iwata
patent: 5156126 (1992-10-01), Ohkabo et al.
patent: 5158057 (1992-10-01), Ikaura et al.
patent: 5186145 (1993-02-01), Sakakibara
patent: 5190011 (1993-03-01), Hashimodo et al.
Hashimoto Atsuko
Iwata Toshio
Mitsubishi Denki & Kabushiki Kaisha
Nelli Raymond A.
LandOfFree
Knock suppressing apparatus for internal combustion engine 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 suppressing apparatus for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Knock suppressing apparatus for internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-165320