0

Full Content is available to subscribers

Subscribe/Learn More  >

Modeling and Excitation Torque Estimation of an Engine Cold-Test Stand for Evaluating Driveline Design and Fault Diagnostics

[+] Author Affiliations
Kamran A. Gul, Douglas E. Adams

Purdue University, West Lafayette, IN

Paper No. IMECE2007-43255, pp. 697-706; 10 pages
doi:10.1115/IMECE2007-43255
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 10: Mechanics of Solids and Structures, Parts A and B
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4304-1 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

The fault detection process becomes difficult in engine cold-testing when the test stands undergo torsional vibrations excited by various engine harmonics. In the context of vibration suppression and assembly faults diagnostics, this paper focuses on three main aspects: cold-test stand modeling and validation, estimation of cold-engine excitation torque, and evaluation of a fuel injector pulse diagnostic test. To analyze the vibratory torque of the cold-test stand driveline, an engine excitation model comprising of inertia torque and unfired gas pressure torque is needed. The gas pressure torque cannot be determined in the absence of engine gas pressure measurements. It is shown that this excitation torque can be estimated by assuming that the net torque during the unfired engine cycle is zero and by utilizing the firing engine gas pressure torque in the combustion stroke. The estimated excitation torque is employed to validate models of different cold-test stands and also to examine various driveline design alternatives. Using embedded sensitivity functions, it is found that by changing the inertia and stiffness of the rubber coupling, the torsional vibrations can be suppressed. Finally, the modified design is evaluated for an injector pulse diagnostic test. It is shown that the design modifications can also enhance sensitivity to faults if the injector pulse test is carried out at higher speeds.

Copyright © 2007 by ASME
Topics: Torque , Engines , Design , Modeling

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

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 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