Executive Summary
Effects of knocking in spark-ignition internal combustion engines range from inconsequential such as an annoying noise to completely destructive such as blasting holes through cylinder heads or pistons. With the rise in turbo charged engines, high efficiency engines, and high performance engines in everything from lawnmowers to automobiles, knock detection and prevention has become absolutely critical. Researchers at Michigan State University have created a novel sensor for knock detection that does not add to the complexity of the engine and that is more effective, accurate and cost-efficient than currently used technology.
Description of Technology
The new MSU knocking sensor technology uses a simple and cost-effective sensor design for in-cylinder measurements and feedback prevention which allows the engine to adjust firing time and other measures to prevent knocking. Knock detection with this new sensor is more accurate than existing technology, has less problems with interference, and reduces the amount of false positives. The technology does not require additional parts to be added to the engine, just an inexpensive upgrade of existing equipment.
Key Benefits
- Simplified and more accurate knock detection
- Less detection interference
- Existing equipment can be upgraded at low cost
Applications
- Automotive Engines
- Motorcycle engines
- Recreational Vehicle engines (snow mobiles, boats, dune buggy, etc.)
- Gas Lawn Mowers
Patent Status:
Granted patents: Thailand TH1801000902, United States US 10,221,827, Canada CA2995576, Japan JP6781480, Malaysia MY199152, Korea KR102557707
References:
“Closed loop ignition timing control using ionization current feedback,” IEEE Transaction on Control System Technology, Vol. 15, No. 3, May 2007
“Stochastic limit control and its application to knock limit control using ionization feedback,” SAE International Journal of Engines, 2005-01-0018, 2005
“IC engine retard ignition timing limit detection and control using in-cylinder ionization signal,” SAE International Journal of Engines, 2004-01-2977, 2004
“MBT timing detection and its closed-loop control using in-cylinder ionization signal,” SAE International Journal of Engines, 2004-01-2976, 2004
Licensing Rights Available
Rights for specific fields available.
Inventors: Dr. George Zhu, Kevin D. Moran
Tech ID: TEC2015-0105
