Variable-capacity radial turbine

Details Variable-capacity radial turbine Variable-capacity radial turbine

1983-12-23

1985-10-01

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

415205, 415219R, 60602, F04D 2944, F04D 2700

Patent

active

045443262

ABSTRACT:
A turbine scroll passage of a turbine is divided into first and second scroll passages extending in parallel to each other along the scroll passage. The first passage is formed with a side aperture for directing the fluid in the scroll passage to a turbine wheel. The second passage is isolated from the side aperture by a partition wall separating the second passage from the first passage. The partition wall is formed with a longitudinally extending opening for providing a fluid communication between the first and second passages. The opening extends longitudinally through about 360 degrees around the axis of the turbine, and has a constant width over its length. In the secondary passage, there is disposed a valve of a swing, rotary or other type, for closing the secondary passage. When the turbine is a part of a turbocharger connected with an internal combustion engine, the secondary passage is closed by the valve in a low engine speed range. The opening of the partition wall and the valve are designed in various ways.

REFERENCES:
patent: 3614259 (1971-10-01), Neff
patent: 4138849 (1979-02-01), Wilber
patent: 4389845 (1983-06-01), Koike
patent: 4443153 (1984-04-01), Dibelius

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