Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1987-05-21
1988-10-11
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
F02B 3712
Patent
active
047761687
ABSTRACT:
A variable geometry turbine system for internal combustion engine turbochargers is provided which comprises a turbine wheel and a meridionally divided volute having first and second volute passageways defining first and second turbine inlet openings for the flow of exhaust gas from the passageways into the turbine wheel. The system further includes closure means movable betwen a first position in which both from both volute passageways to flow into the turbine turbine inlet openings are open to permit exhaust gas wheel to provide a mixed-flow turbine during periods of high engine speed; and a second position closing the first turbine inlet opening to permit exhaust gas from only the second volute passageway to flow into the turbine wheel to provide an axial-flow turbine during periods of reduced engine speed. The closure means of the system can further include valve means for diverting during periods of reduced engine speed. The turbine all exhaust gas flow into the second volute passageway system is simple in construction, durable, low in cost and provides efficient engine operation over a full range of engine speeds.
REFERENCES:
patent: 2874642 (1959-02-01), Forrest
patent: 3557549 (1971-01-01), Webster
patent: 3614259 (1971-10-01), Neff
patent: 3994620 (1976-11-01), Spraker et al.
patent: 4565505 (1986-01-01), Woollenweber
patent: 4653275 (1987-03-01), Sumser et al.
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