Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1989-02-13
1992-03-03
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
415164, F02B 3712
Patent
active
050921266
ABSTRACT:
A radial turbine combining a twin scroll structure and a variable area nozzle structure which is suitable for use as the exhaust turbine of a turbocharger for an automotive internal combustion engine. The first scroll passage is provided with no flow control means while the second scroll passage is provided with a variable area nozzle unit so that only the first scroll passage is used with the second scroll passage substantially closed in low speed range of the engine and the variable area nozzle unit is activated only when the rotational speed of the engine is increased beyond a certain value. Alternatively, by providing a control valve in the first scroll passage, it is possible to adjust the variable area nozzle unit with the control valve kept closed in low speed range, and to open up both the variable area nozzle unit and the control valve in high speed range. In either case, the turbine is capable of finely adjusting the operating condition thereof without creating excessive back pressure at its inlet end or involving any shocks or lags over the whole speed range.
Honda Giken Kogyo Kabushiki Kaisha
Koczo Michael
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