Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
1986-12-02
1988-08-02
Levy, Stewart J.
Measuring and testing
Engine detonation
Combustion signal compared to reference signal varied by a...
73115, G01L 2322
Patent
active
047607335
ABSTRACT:
The output of a cylinder pressure sensor is digitally sampled and the rate of change of the sampled data is successively calculated. Each calculated rate of change is compared with that one sampling earlier and when the former is found to exceed the latter by more than a predetermined amount, it is determined that knocking has occurred. When knocking is not found, the sampled data at that time is defined to be the maximum cylinder pressure. At the same time, the maximum cylinder pressure angle is detemined by measuring the time lapse between a reference point such as piston TDC and the point of time at which the rate of change in the sampled date become zero and converting the measured time lapse into the corresponding change in crankshaft angle.
REFERENCES:
patent: 3678732 (1972-07-01), Arrigoni et al.
patent: 4131097 (1978-12-01), Sawada et al.
patent: 4449501 (1984-05-01), Greeves
patent: 4455980 (1984-06-01), Sasayama et al.
patent: 4492108 (1985-01-01), van Zanten
patent: 4567751 (1986-02-01), Ootsuka et al.
patent: 4622939 (1986-11-01), Matekunas
Bell Robert P.
Honda Giken Kogyo Kabushiki Kaisha
Levy Stewart J.
LandOfFree
Method of detecting cylinder pressure in internal combustion eng 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 of detecting cylinder pressure in internal combustion eng, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of detecting cylinder pressure in internal combustion eng will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-706372