Eliminating Engine Performance Degradation Over Time Through Compressor Redesign

Paper #:
  • 2013-01-0923

Published:
  • 2013-04-08
Citation:
Krivitzky, E. and Yamamoto, M., "Eliminating Engine Performance Degradation Over Time Through Compressor Redesign," SAE Int. J. Engines 6(2):806-814, 2013, https://doi.org/10.4271/2013-01-0923.
Pages:
9
Abstract:
Commercially available turbocharged internal combustion engines require robust system performance to maintain driveline power output capability. As in-service runtime increases, the accumulation of wear or deposits can adversely affect component performance levels. In a worst-case scenario, the component performance degradation leads to a vicious loop of declining system performance. Endurance testing of a heavy-duty diesel engine revealed performance deterioration over time. Oil deposits, resulting from oil mist associated with the closed crankcase ventilation loop, were observed on the turbocharger compressor and were tied to the deterioration. Cleaning of the compressor recovered initial performance for a short period of time. A different model of turbocharger, when substituted for the original, did not show the same degradation in output. This paper presents a study into the responsible mechanisms for performance deterioration and the compressor redesign that successfully avoided these issues. The results of numerical and physical investigations aimed at mitigating the system impact are discussed, starting with an overview of the observed engine and compressor performance decline, and an outline of potential areas of performance sensitivity to oil accumulation. Ultimately, the degradation of system performance was tied to the system response of deteriorating compressor characteristics. A compressor was redesigned and endurance tested to verify that the adjustment of engine-compressor matching and compressor characteristics results in improved robustness to oil-mist related performance degradation.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$28.00
Mail
$28.00
Members save up to 42% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2011-04-12
Article
2017-07-26
Technical Paper / Journal Article
2011-05-17
Training / Education
2009-12-15
Training / Education
2007-08-08