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http://dx.doi.org/10.3795/KSME-B.2012.36.9.915

Development of IMEP Estimation and Control Algorithm Using In-Cylinder Difference Pressure for Passenger Diesel Engines  

Chung, Jae-Sung (Dept. of Automotive Engineering, Hanayng Univ.)
Oh, Seung-Suk (Dept. of Automotive Engineering, Hanayng Univ.)
Park, In-Seok (Dept. of Automotive Engineering, Hanayng Univ.)
SunWoo, Myoung-Ho (Dept. of Automotive Engineering, Hanyang Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.9, 2012 , pp. 915-921 More about this Journal
Abstract
In this study, we propose a new method for estimating the IMEP using difference pressure, which is the pressure difference between the cylinder pressure and the motoring pressure. The estimated IMEP, denoted as $IMEP_{diff}$, optimizes the theoretical IMEP calculation range based on the fact that the difference pressure exists between the start and the end of combustion. $IMEP_{diff}$ is verified to have a high linear correlation with IMEP with $R^2$ of 0.9955. The proposed method can estimate the IMEP with 21% of the cylinder pressure data and 31% of the calculation effort compared to the theoretical IMEP calculation method, and therefore, it has great potential for real-time implementations. The estimation and control performance of $IMEP_{diff}$ is validated by engine experiments, and by controlling $IMEP_{diff}$, the torque variation between the cylinders was reduced.
Keywords
Indicated Mean Effective Pressure; Cylinder Pressure; Difference Pressure; Torque Control; Torque Estimation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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