Aircraft engine detonation indication system

Details Aircraft engine detonation indication system Aircraft engine detonation indication system

1994-11-29

1996-12-03

Chapman, John E.

Measuring and testing

Engine detonation

Combustion signal compared to a fixed reference signal or...

73 3513, G01L 2322

Patent

active

055810160

ABSTRACT:
A detonation detection system for internal combustion piston engines which senses pressure within each cylinder through a piezoelectric force transducers installed under each spark plug producing pressure charged signals which signal is converted from inline charge to voltage. The signal is then passed through a gating comparator which segregates out the low pressure signals associated with intake and exhaust strokes. The signal then passes through a high-pass filter which removes normal combustion pressures. The filtered signal is then processed through an RMS (root mean square) to a DC converter which continuously computes the instantaneous square of the input signal, averages it, and takes the square root of the result to provide a DC voltage proportional to the RMS of the input. The DC signal is then processed through a peak and hold circuit which holds the peak signal for an adjustable reset-time period. A digital display is provided for each cylinder which receives and displays in numerical value the peak RMS signal.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4163385 (1979-08-01), Kato et al.
patent: 4577510 (1986-03-01), Bur et al.
patent: 4750103 (1988-06-01), Abo et al.
patent: 4984905 (1991-01-01), Amano et al.

Affiliated with

Also associated with

Rating

Aircraft engine detonation indication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-786886