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Study of Variable Scroll Type Turbocharger (Performance Test in Diesel Engine)
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English
Abstract
This report describes with the performance test of a diesel engine using a new variable scroll type turbocharger (VS turbocharger).
The experimental variable scroll is relatively a simple structure in which several scroll pieces are jointed by pins, located inside of exhaust turbine inlet flow passage. The scroll is varied by the control rod according to exhaust flow volume, and as a result, the A/R ratio that effects to the performance of turbocharger is varied.
To compare the performances of variable scroll type turbocharger with a conventional turbocharger with waste gate, a test of diesel engine equipped with each was performed. The experimental results show that VS turbocharger increases more than the conventional turbocharger in boost pressure at lower engine speed, and the wide torque range is ensured. Also, the experimental scroll pieces did not showed signs of trouble from heat wear during experimentation ensuring reliability.
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Citation
Ogura, M., Umezaki, E., and Tomita, T., "Study of Variable Scroll Type Turbocharger (Performance Test in Diesel Engine)," SAE Technical Paper 891873, 1989, https://doi.org/10.4271/891873.Also In
References
- Satoh H. Miyauch J. Nakaaawa N. Matsuo E. “Development of A Variable Geometry Turbocharger for Truck and Buses” 1983 Tokyo International Gas Turbine Congress, 83-TOKYO-IGTC-77(1983)
- Hashimoto T. Okada K. Oikawa T. “ISUZU New 9.8L Diesel Engine with Variable Geometry Turbocharger” SAE Paper 860460 1986
- Furukawa H. Ikeya N. “Development of IHI RH Turbocharger of Variable Geometry Nozzle for Automobile Engine” Third Conference on Pressure Charging of Internal Combustion Engine” ETH Zurich 1988