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Variable Area Turbocharger for High Output Diesel Engines
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English
Abstract
High output turbocharged diesel engines require efficient air delivery systems with high pressure ratio, broad range and surge-free compressors of very high efficiency. Similarly, high efficiency turbines with variable stators will be needed to maintain high turbine speed at times when engine speed and airflow are low.
The turbocharger that evolved in a U.S. Army TARADCOM sponsored program to meet these goals has a backward curved centrifugal compressor with a wedge type moveable vane diffuser for surge control and a radial inflow turbine with individually pivoted nozzle vanes for inlet flow area control.
After several design iterations and bench tests, extensive engine tests were conducted to demonstrate the substantial improvements in diesel engine performance that are attainable with these turbochargers.
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Citation
Berenyi, S. and Raffa, C., "Variable Area Turbocharger for High Output Diesel Engines," SAE Technical Paper 790064, 1979, https://doi.org/10.4271/790064.Also In
References
- Balje O.E. Tromblay J.E. Bass W.A. “Variable Geometry Centrifugal Compressors for Turbocharger Application.” H.J. Wood & Associates 1967
- Barbeau Dennis “A Study of a Family of Turbochargers Suitable for 2 to 1, 4 to 1 and 6 to 1 Manifold Pressure Ratio Applications.” Continental Aviation and Engineering, Report No. 1064, U.S. Army Contract No. DAAE-07-67-C-0486 1967
- Wood Homer J. “Nonlinear Vibration Damping Functions for Fluid Film Bearings.” Power Dynetics, Inc. SAE 670061 1967
- Matt R.J. Giannotti R.J. “Performance of High Speed Ball Bearings with Jet Oil Lubrication.” General Motors Corporation 1966
- Grundy J.R. Kiley L.R. Brevick E.A. “AVCR-1360-2 High Specific Output - Variable Compression Ratio Diesel Engine.” SAE 760051 1976