Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Aircraft engine detonation indication system










Image Number 2 for United States Patent #5581016.

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.








 
 
  Recently Added Patents
Protection circuit, substrate for electro-optical device, electro-optical device, electrophoretic display device, electronic apparatus, and manufacturing method of electro-optical device
Closed-loop adaptive adjustment of pacing therapy based on cardiogenic impedance signals detected by an implantable medical device
Spin transition material
Heat stable variants of plant adenosine diphosphate glucose pyrophosphorylase small subunit
Notebook computer
System and method for solving connection violations
Method and apparatus for exercise monitoring combining exercise monitoring and visual data with wireless internet connectivity
  Randomly Featured Patents
Rotary thumbwheel switch assembly
Mixed persalts stable in detergent compositions
IC die power connection using canted coil spring
Trim connecting structure
Device and process for cutting grass sods with a constant thickness from grass land
Use of electromagnetic pulses in cross-flow filtration systems
Fastening element for the connection together of two sheet members
Method for balancing wear when writing data in a flash memory
Sensor arrangement
Cardiac pacing system for prevention of ventricular fibrillation and ventricular tachycardia episode