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
Tracking an object with multiple asynchronous cameras
Information processing apparatus, information processing method, and storage medium
System and method for an emergency reserve during a covered event using actuarial data
Account holder demand account update
Razor handle
VoIP interface using a wireless home entertainment hub
Direct memory access (DMA) address translation between peer-to-peer input/output (I/O) devices
  Randomly Featured Patents
Satellite positioning system receivers and methods
Selecting tree summary operations for a tree
Knife attachment for a sheet cutting system
Error detecting mechanism for servosystem
Embossed sound track
Method for making a high-temperature superconducting field-effect transistor with thick superconducting channel layer
Fuel and air mixing parts for a turbine combustion chamber
Device for the determination of the concentration of solid particles
Feedback controller
Percussion drill and chuck arrangement therefor