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
Bioactive agent-loaded heart-targeting nanoparticles
Imaging apparatus, control method thereof, and program
Packaging sleeve
High order continuous time filter
Managing wear leveling and garbage collection operations in a solid-state memory using linked lists
Terminal device and image printing method
Matching geometry generation and display of mammograms and tomosynthesis images
  Randomly Featured Patents
Method and apparatus of treating a disc plate
Helicopter control with multiple schedule rotor speed decay anticipator
Ink jet head having plural electrodes opposing an electrostatically deformable diaphragm
High accuracy self-setting plumb bob with slide hammer
SOI device with charging protection and methods of making same
Lamination product and method employing temporary transfer film
Synthesis of epothilones, intermediates thereto, analogues and uses thereof
System for providing spatial awareness of transmissions of energy in an environment
Froth flotation
Method and apparatus for preventing and treating eyelid problems