0
Research Papers

Engine Cycle-by-Cycle Cylinder Wall Temperature Observer-Based Estimation Through Cylinder Pressure Signals

[+] Author and Article Information
Fengjun Yan

Junmin Wang1

Department of Mechanical and Aerospace Engineering,  The Ohio State University, Columbus, OH 43210wang.1381@osu.edu

1

Corresponding author.

J. Dyn. Sys., Meas., Control 134(6), 061014 (Sep 26, 2012) (8 pages) doi:10.1115/1.4006222 History: Received April 15, 2011; Revised February 06, 2012; Published September 26, 2012

The effects caused by the cylinder wall temperature variations are nontrivial in advanced combustion mode engine control, particularly in cold-start processes and transients when the combustion mode switches from one to another. Being affected by the engine coolant and operating conditions on a cycle-by-cycle basis, cylinder wall temperature is difficult to be directly measured, and it is typically viewed as an unknown disturbance or estimated as a quasi-static parameter. However, such treatments of the cylinder wall temperature may not be sufficient in sophisticated control of combustion processes. This paper aims to estimate the cylinder wall temperature, on a cycle-by-cycle basis, through cylinder pressure signals in diesel engines. In the proposed methods, the cylinder wall temperature is modeled as a disturbance in the in-cylinder pressure dynamics. Thus, the wall temperature in each cylinder can be estimated, on a cycle-by-cycle basis, by the disturbance observer methods in finite crankshaft angles. Furthermore, to reduce the cylinder wall temperature estimation errors caused by the high-frequency noises in the cylinder pressure signals, a robust disturbance observer is proposed and compared with a typical design method. Through GT-Power engine model simulations and engine experimental results, the observer effectiveness, noise attenuation properties, and applications on a multicylinder diesel engine are evaluated.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Heat transfer to the cylinder wall during combustion

Grahic Jump Location
Figure 2

In-cylinder wall temperature estimation in a GT-Power engine model

Grahic Jump Location
Figure 3

A fully instrumented medium-duty diesel engine test bench

Grahic Jump Location
Figure 4

Measured engine coolant temperature variation during a cold-start

Grahic Jump Location
Figure 5

In-cylinder pressure traces

Grahic Jump Location
Figure 6

Cylinder pressure variations without heat transfer from fuel combustion

Grahic Jump Location
Figure 7

Observer 2 output in crank angle domain for one cylinder in one cycle

Grahic Jump Location
Figure 8

Cylinder wall temperature estimation by observer 1

Grahic Jump Location
Figure 9

Cylinder wall temperature estimation by observer 2

Grahic Jump Location
Figure 10

Noise influence comparisons for observer 1

Grahic Jump Location
Figure 11

Noise influence comparisons for observer 2

Grahic Jump Location
Figure 12

V8 medium-duty diesel engine cylinder layout

Grahic Jump Location
Figure 13

Cylinder wall temperature estimations by fuel injection imbalances

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