期刊
CONTROL ENGINEERING PRACTICE
卷 125, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.conengprac.2022.105226
关键词
Diesel engine; Modified Kalman filter; Reference IMEP estimation; Closed-loop combustion control
资金
- Ministry of Industry and Information Technology of the People's Republic of China [[2019] 360]
In-cylinder pressure-based closed-loop combustion control is a critical technology used to address cylinder-to-cylinder inhomogeneity in modern diesel engines. This study develops a reference governor-based combustion control method to reduce combustion dispersions and calibration effort. The method uses a dynamic-target prediction model and an IMEP control strategy to achieve better transient tracking performance and reduce cylinder-to-cylinder variations.
In-cylinder pressure-based closed-loop combustion control is a critical technology used to address the issue of cylinder-to-cylinder inhomogeneity throughout the life cycle of a modern diesel engine. Nevertheless, closed loop combustion control technology (CLCC), which requires a reference or set-point that the control attempts to achieve, causes an increase in the operating maps and the complexity of the calibration effort. In this study, a reference governor-based combustion control (RGCC) is developed in order to reduce the cylinder-to-cylinder combustion dispersions and the calibration effort associated with enabling of the CLCC simultaneously. The RGCC consists of a dynamic-target online prediction model and an indicated mean effective pressure (IMEP) control strategy. The dynamic-target prediction model is designed based on the IMEP of the engine real-time tests; it uses a modified Kalman filter algorithm, which provides the set-point value for the IMEP control strategy. The effectiveness of the proposed RGCC is experimentally validated on a commercial diesel engine test bench under steady-state and transient-state conditions. The experimental results show that the RGCC displayed far better transient tracking performance than the closed-loop IMEP control based on MAP. Furthermore, the controller can effectively reduce cylinder-to-cylinder IMEP variations under steady-state and transient-state conditions.
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