Internal combustion engine with a dual turbocharger system

Details Internal combustion engine with a dual turbocharger system Internal combustion engine with a dual turbocharger system

1990-11-20

1992-12-08

Bertsch, Richard A.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

60602, F02B 3712

Patent

active

051687070

ABSTRACT:
An internal combustion engine with a dual turbocharger system includes an engine, a first turbocharger and a second turbocharger arranged in parallel with each other, an intake switching valve located downstream of a compressor of the second turbocharger, and an exhaust switching valve located downstream of a turbine of the second turbocharger. At large intake air quantities, both turbochargers are operated, while at small to medium intake air quantities only the first turbocharger is operated. At "one-turbocharger-operation", when the engine load is low, the intake switching valve is opened, while the exhaust switching valve is maintained closed. Thus, at small to medium intake air quantities and low engine loads, the intake flow can be introduced through both the compressor of the first turbocharger and the compressor of the second turbocharger. As a result, flow resistance is decreased and acceleration response from low engine loads is improved.

REFERENCES:
patent: 3038297 (1962-06-01), Kauffmann
patent: 4474008 (1984-10-01), Sakurai
patent: 4781027 (1988-11-01), Richter
patent: 4793140 (1988-12-01), Esch
patent: 4982567 (1991-03-01), Hashimoto et al.
patent: 5003781 (1991-04-01), Shibata et al.
patent: 5005359 (1991-04-01), Tashima et al.
patent: 5036663 (1991-08-01), Akagi et al.

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