Journal
CONTROL ENGINEERING PRACTICE
Volume 20, Issue 5, Pages 531-538Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.conengprac.2012.01.008
Keywords
Temperature signal reconstruction; Diesel engine control; Extended Kalman filter; Advanced combustion mode control
Funding
- National Science Foundation (NSF) [CMMI-1029611]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1029611] Funding Source: National Science Foundation
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Temperature measurements by the typical thermocouples contain some first-order dynamics with varying time-constants and need to be reconstructed in transient conditions for improving the accuracy of the temperature information. Particularly, for Diesel engine advanced combustion mode control, the accurate acquisitions of the rapidly varying transient temperatures, such as the intake manifold gas temperature, are of importance. In this paper, a temperature reconstruction method, without using additional sensors, is proposed by utilizing the counterpart pressure signal. Through investigating the thermocouple dynamics in terms of the intake manifold pressure and temperature, an intake manifold temperature model was derived. According to this proposed temperature model, the transient temperature reconstruction can be formulated as a thermocouple time-constant estimation problem. Within this framework, an extended Kalman filter (EKF) based method was devised for the parameter estimations. The proposed method was validated through high-fidelity GT-Power engine model simulations as well as experimental results obtained on a multi-cylinder medium-duty Diesel engine. (C) 2012 Elsevier Ltd. All rights reserved.
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