IGTC-118 Start-up Behaviour of Small Variable and fixed Geometry turbochargers with Ball and Solid Bearings(Organized Session VI AUTOMOTIVE TURBOCHARGERS)
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概要
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Exhaust gas turbochargers with variable geometry can be used to improve the response of turbocharged engines for passenger vehicles. It is known that exhaust gas turbines can be most effectively controlled with adjustable guide vanes. A very small inlet flow angle then results in high turbine inlet velocities even at low engine speeds and exhaust gas mass flow rates. This ensures rapid acceleration of turbine and compressor. This paper concentrates less on the effect of guide vane control on the turbine operating characteristics under partial and full load conditions, rather than the processes which take place when starting and running up the turbocharger. For reasons of comparison, the experimental investigations discussed within this paper were done with two different turbocharger types for passenger cars, showing the influence of plain and ball bearings as well as the influence of turbine inlet guide vanes.
- 公益社団法人日本ガスタービン学会の論文
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