An Alternative Method to MFB50 for Combustion Phase Detection and Control in Common Rail Diesel Engines

Title
An Alternative Method to MFB50 for Combustion Phase Detection and Control in Common Rail Diesel Engines
Authors
선우명호
Keywords
Combustion phase control; combustion phase detection; diesel engine; difference pressure; in-cylinder pressure
Issue Date
2015-08
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE-ASME TRANSACTIONS ON MECHATRONICS, v. 20, NO 4, Page. 1553-1560
Abstract
Although injection timing does not change at every cycle in compression ignition engines, the variations in combustion phase may occur. The variations in combustion phase are directly related to emission dispersion, torque variation, and fuel economy; therefore, the variations should beminimized by combustion phase detection and control. In this study, we propose a novel combustion indicator: location of 20% of initial heat release after the peak (IHRap20) that is an alternative to MFB50 to detect and control combustion phase in real time. IHRap20 is extracted from IHR, which is a simplified heat release model derived by the product of in-cylinder volume and the gradient of difference pressure between firing pressure and motoring pressure. IHRap20 is confirmed with engine experiment that it is highly correlated to MFB50 with RMSE of 0.2790 degrees crank angle and R-2 of 0.9873 under various operating conditions such as injection timing, mass air flow, boost pressure, and rail pressure changes. In addition, IHRap20 is able to detect combustion phase in real time with fewer number of in-cylinder pressure data and computational load compared to MFB50. Furthermore, IHRap20 is more robust to in-cylinder pressure sensor noise than MFB50. Consequently, IHRap20 is promising for real-time combustion phase detection.
URI
http://ieeexplore.ieee.org/abstract/document/7102760/http://hdl.handle.net/20.500.11754/26883
ISSN
1083-4435; 1941-014X
DOI
http://dx.doi.org/10.1109/TMECH.2015.2403269
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF AUTOMOTIVE ENGINEERING(미래자동차공학과) > Articles
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