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Tumble Generator Valve (TGV) Control of In-Cylinder Bulk Flow and Its Turbulence Near Spark Plug in SI Engine
Technical Paper
2001-01-1306
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2001 World Congress
Language:
English
Abstract
The in-cylinder bulk flow and turbulence characteristics in a spark ignition engine were examined using two particle image velocimetry (PIV) systems. The effects of a turbulence-generating valve (TGV) bulk flow and turbulence characteristics were investigated. The results show that both the motion and location of turbulent flow can be controlled by a TGV valve. This could be used to reduce the level of unburned hydrocarbons produced during a cold start. The time history and scales of turbulence [1, 2 and 3] were compared with those obtained using laser Doppler velocimetry. The developed PIV systems were accurate, and the measured data were reliable enough to permit discussion of the cycle-resolve and cycle-to-cycle variation of in-cylinder flow. At top dead center, the measured turbulence scales of motion in the flow with the TGV closed were two thirds of those obtained with the TGV open.
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Citation
Kaneko, M., Ikeda, Y., and Nakajima, T., "Tumble Generator Valve (TGV) Control of In-Cylinder Bulk Flow and Its Turbulence Near Spark Plug in SI Engine," SAE Technical Paper 2001-01-1306, 2001, https://doi.org/10.4271/2001-01-1306.Also In
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