0
Research Papers

Extended Kalman Filter Based In-Cylinder Temperature Estimation for Diesel Engines With Thermocouple Lag Compensation

[+] Author and Article Information
Song Chen

Department of Mechanical Engineering,
McMaster University,
Hamilton, ON, L8S 4L7, Canada
e-mail: chens78@mcmaster.ca

Fengjun Yan

Department of Mechanical Engineering,
McMaster University,
Hamilton, ON, L8S 4L7, Canada
e-mail: yanfeng@mcmaster.ca

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received July 8, 2013; final manuscript received March 10, 2014; published online June 12, 2014. Assoc. Editor: Gregory Shaver.

J. Dyn. Sys., Meas., Control 136(5), 051010 (Jun 12, 2014) (8 pages) Paper No: DS-13-1264; doi: 10.1115/1.4027170 History: Received July 08, 2013; Revised March 10, 2014

The in-cylinder temperature information is critical for auto-ignition combustion control in diesel engines, but difficult to be directly accessed at low cost in production engines. Through investigating the thermodynamics of Tivc, cycle-by-cycle models are proposed in this paper for the estimation of in-cylinder temperature at the crank angle of intake valve closing (IVC), referred to as Tivc. An extended Kalman filter (EKF) based method was devised by utilizing the measurable temperature information from the intake and exhaust manifolds. Due to the fact that measured temperature signals by typical thermocouples have slow responses which can be modeled as first-order lags with varying time-constants, temperature signals need to be reconstructed in transient conditions. In the proposed EKF estimation method, this issue can be effectively addressed by analyzing the measurement errors and properly selecting the noises covariance matrices. The proposed estimation method was validated through a high-fidelity GT-power engine model.

FIGURES IN THIS ARTICLE
<>
Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Diesel engine schematic diagram

Grahic Jump Location
Fig. 2

Mass of injected fuel

Grahic Jump Location
Fig. 3

Normalized EGR valve opening (0—fully close; 1—fully open)

Grahic Jump Location
Fig. 4

Simulated intake manifold temperature

Grahic Jump Location
Fig. 5

Simulated exhaust manifold temperature

Grahic Jump Location
Fig. 6

Comparison between the estimated and actual in-cylinder temperatures at IVC

Grahic Jump Location
Fig. 7

Error of the estimated in-cylinder temperature at IVC

Grahic Jump Location
Fig. 8

The simulated time-constant for the thermocouples in intake and exhaust manifolds: (a) the time-constant of the thermocouple in the intake manifold and (b) the time-constant of the thermocouple in the exhaust manifold

Grahic Jump Location
Fig. 9

Estimated Tivc without consideration of the thermocouple delay: (a) estimated Tivc and (b) error of estimation

Grahic Jump Location
Fig. 10

Estimated Tivc by the proposed method: (a) estimated Tivc and (b) error of estimation

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In