Resources Contact Us Home
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
Magnetic reading and writing device
Pet cremation urn
Method and apparatus for transmitting and receiving a signal in a communication system
Computer server capable of supporting CPU virtualization
Device to facilitate moving an electrical cable of an electric vehicle charging station and method of providing the same
Rose plant named `ESM R057`
Method and device for monitoring and analyzing signals
  Randomly Featured Patents
Bacterial strain for a metal biosorption process
Food support
Glass reinforced gypsum board
Method for making a distortion-free multiple unit prosthesis
Automated meter reading system
Mechanism for adjusting relative positions of multiple injection nozzles of an injection apparatus
Method for detecting, the presense or amount of a taxonomic group of organisms using specific R-RNA subsequences as probes
Electrical outlet unit
Absorption refrigeration system utilizing low temperature heat source
Apparatus and method for detection with a scanning microscope