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
Handheld electronic communication device having sliding display
Communication system and data transmission method thereof
Light barrier and method for detecting objects
Image processing device, image forming apparatus, and non-transitory computer readable recording medium
Use of endogenous promoters in genetic engineering of Nannochloropsis gaditana
Brushless electric motor or generator in shell construction
Mineral, nutritional, cosmetic, pharmaceutical, and agricultural compositions and methods for producing the same
  Randomly Featured Patents
Method of making fibre-based products and their use
Combined transmitter and receiver for child monitoring and recharger therefor
Box construction
Device for holding a piston in a system for coating pistons
Method for immobilization of polypeptides
Fluidifying agents for cementitious compositions based random copolymers, compositions comprising the same, and methods for their use
Method and apparatus for measurement of azimuth of a borehole while drilling
Alerting a participant when a topic of interest is being discussed and/or a speaker of interest is speaking during a conference call
Reactor feed pipe design
Transverse web forming apparatus