A Cylinder Pressure Sensor for Spark Advance Control and Knock Detection 790139
A cylinder pressure time history has long been used as an indication of the performance of internal combustion engines. Recently the use of cylinder pressure has been proposed for the knock adaptive closed loop control of spark advance (1, 2)*. The ultimate practicality of such a scheme depends heavily on the cost and reliability of a sensor to make this measurement.
This paper describes the design, associated analysis, and the experimental performance of a potentially inexpensive sensor. The transducer is shown to be suitable for determination of the crank angle at the peak cylinder pressure and for detection of incipient detonation through the associated high frequency cylinder pressure oscillations. Furthermore, implementation of the sensor in a closed loop spark control system is briefly described. The sensor has proven to be adequate for spark advance control purposes.
Citation: Randall, K. and Powell, J., "A Cylinder Pressure Sensor for Spark Advance Control and Knock Detection," SAE Technical Paper 790139, 1979, https://doi.org/10.4271/790139. Download Citation
Author(s):
Kent W. Randall, J. David Powell
Pages: 10
Event:
1979 Automotive Engineering Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Automotive Sensors-SP-0441
Related Topics:
Engine cylinders
Control systems
Combustion and combustion processes
Knock
Pressure
Sensors and actuators
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »