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
System and method for redirected firewall discovery in a network environment
Method of processing data and display apparatus for performing the method
Computer system and volume migration control method using the same
Creation and use of test cases for automated testing of media-based applications
Pluggable power cell for an inverter
High throughput thin film characterization and defect detection
Electrode structure and its manufacturing method, and semiconductor module
  Randomly Featured Patents
Method and system for maintaining data at input/output (I/O) interfaces for a multiprocessor system
Dual pipe cache memory with out-of-order issue capability
Comprehensive security structure platform for network managers
Rotor Spinning machine
Projection type display device
Method and apparatus for measuring thickness of a film
Method and apparatus for integrating implantable medical device data
Tip cap for a rotor blade and method of replacement
System and method for monitoring a validator
Container coating method