This content is not included in your SAE MOBILUS subscription, or you are not logged in.
MBT Control Utilizing Crank Angle of Maximum Combustion Pressure
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
For better power output and fuel economy of a four stroke cycle ignition engine, the ignition timing should preferably be set to the minimum spark advance for best torque (MBT).
It is found that when the ignition timing is set MBT, the crank angle of the maximum combustion pressure (θpmax) usually lies between 12 and 14 deg after top dead center (ATDC) regardless of any engine specifications or operating factors. Therefore, the ignition timing can be controlled to be MBT by using the θpmax.
This paper describes the relationship between the θpmax and MBT by both experimental results and numerical calculations, and MBT control system utilizing θpmax. And the test results by using this system are also described.
CitationFujii, I., Yagi, S., Kawai, M., and Yoshikawa, H., "MBT Control Utilizing Crank Angle of Maximum Combustion Pressure," SAE Technical Paper 890759, 1989, https://doi.org/10.4271/890759.
- Hata Y. Asano M. “New Trends in Electronic Engine Control To the Next Stage” SAE Paper 860592
- Powell J. “Closed loop control of spark advance using cylinder Pressure” Int. J. of Vehicle Design 1983
- Yagi S. Ishizuya A. Fujii I. “Research and Development of High Speed, High Performance Small Displacement Honda Engines” SAE Paper 700122
- Blumberg P. Kummer J.T. “Prediction of NO Formation in Spark-Ignited Engines. An Analysis of Method of Control” Combustion Science and Technology 1971 4 73 95
- Sihling G. Woschni G. “Experimental Investigation of the Instantaneous Heat Transfer in the Cylinder of a High Speed Diesel Engine” SAE Paper 790833