Research Papers

Exhaust Pressure Estimation and Its Application to Detection and Isolation of Turbocharger System Faults for Internal Combustion Engines

[+] Author and Article Information
Yue-Yun Wang

Ibrahim Haskara

e-mail: ibrahim.haskara@gm.com Propulsion Systems Research Lab, General Motors Research & Development, 30500 Mound Road, Warren, MI 48090

J. Dyn. Sys., Meas., Control 134(2), 021002 (Dec 29, 2011) (8 pages) doi:10.1115/1.4005045 History: Received July 19, 2010; Revised June 15, 2011; Published December 29, 2011; Online December 29, 2011

Engine exhaust backpressure is a critical parameter in the calculation of the volumetric efficiency and exhaust gas recirculation flow of an internal combustion engine. The backpressure also needs to be controlled to a presetting limit under high speed and load engine operating conditions to avoid damaging a turbocharger. In this paper, a method is developed to estimate exhaust pressure for internal combustion engines equipped with variable geometry turbochargers. The method uses a model-based approach that applies a coordinate transformation to generate a turbine map for the estimation of exhaust pressure. This estimation can substitute for an expensive pressure sensor, thus saving significant cost for production vehicles. On the other hand, for internal combustion engines that have already installed exhaust pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Cumulative sum algorithms are applied to residuals based on multiple sensor fusion, and with the help of signal processing, the algorithms are able to detect and isolate critical failure modes of a turbocharger system.

Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 3

Turbine map with new coordinates

Grahic Jump Location
Figure 4

Turbine map under the new coordinates

Grahic Jump Location
Figure 5

Correlation of actual and estimated pressure ratios

Grahic Jump Location
Figure 6

Exhaust pressure estimation validation

Grahic Jump Location
Figure 7

Exhaust pressure estimation over all engine steady state conditions

Grahic Jump Location
Figure 8

Exhaust pressure estimation during FTP75 transient cycle

Grahic Jump Location
Figure 9

Model-based residual generation for fault detection

Grahic Jump Location
Figure 10

Exhaust pressure sensor in range high fault

Grahic Jump Location
Figure 11

Detecting exhaust pressure sensor in range high fault using CUSUM

Grahic Jump Location
Figure 12

Detecting pressure sensor in range low fault using CUSUM

Grahic Jump Location
Figure 13

Isolation of VGT vane stuck fault

Grahic Jump Location
Figure 14

Isolation of VGT vane position sensor fault

Grahic Jump Location
Figure 15

(a) Detection shows that wastegate opens successfully and (b) Residual of the exhaust pressure estimate

Grahic Jump Location
Figure 16

(a) Wastegate stuck close failure and (b) Exhaust pressure estimate residual for wastegate stuck close fault

Grahic Jump Location
Figure 17

Wastegate successfully closed

Grahic Jump Location
Figure 18

Wastegate stuck open fault

Grahic Jump Location
Figure 2

Turbine map for a turbocharger system

Grahic Jump Location
Figure 1

Diesel engine with VGT and EGR systems




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