Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Patent
1989-02-13
1989-09-19
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
415148, 415151, F01D 1716
Patent
active
048676373
ABSTRACT:
A radial turbine of a variable area nozzle type which is suitable for use as the exhaust turbine of a turbocharger for an automotive internal combustion engine requiring a quick response and a wide operating range. This turbine comprises at least two groups of variable area nozzles which may be, for instance, defined by moveable vanes, and can be individually controlled for each group to vary their sizes. By opening the variable area nozzles of the first group while the variable area nozzles of the second group are kept closed, a sufficient supercharging effect can be obtained even when the fluid flow rate is small. By opening the variable area nozzles of both the groups, the resistance to the fluid flow can be reduced and the creation of excessive back pressure at the inlet to the turbine can be avoided even when the fluid flow rate is large. In this way, not only the operating range of the turbine can be expanded but also the control accuracy particularly in small nozzle opening condition can be improved.
REFERENCES:
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patent: 2860827 (1958-11-01), Egli
patent: 3101926 (1963-08-01), Weber
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patent: 4776757 (1988-10-01), Sedille et al.
patent: 4780054 (1988-10-01), Yano et al.
patent: 4799856 (1989-01-01), Matsudaira et al.
Garrett Robert E.
Honda Giken Kogyo Kabushiki Kaisha
Kwon John T.
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