Turbocharged engine including an engine driven supercharger

Details Turbocharged engine including an engine driven supercharger Turbocharged engine including an engine driven supercharger

1988-09-30

1990-02-27

Koczo, Michael

Power plants

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

With supercharging means for engine

F02B 3704

Patent

active

049034880

ABSTRACT:
An engine has an air supply passage and an exhaust gas passage. A supercharger and a turbocharger compressor are disposed in the air supply passage. The turbocharger compressor is disposed downstream of the supercharger and is driven by a turbocharger turbine disposed in the exhaust gas passage. A valved air by-pass is provided for conducting air around the supercharger between the supercharger outlet and inlet. A valved exhaust gas by-pass is provided for conducting exhaust gas around the turbine. During engine low speed operation the air by-pass and exhaust gas by-pass are closed and air is compressed by both the supercharger and compressor acting in series. During an intermediate speed range, the air by-pass is partially opened under the control of the air pressure at the compressor outlet to assure that such air pressure does not exceed a preset value. During a high speed range (i) the supercharger is shut down and the air by-pass is fully open so that only the turbocharger compresses air, and (ii) the exhaust gas by-pass is opened under the control of the pressure in the air inlet passage to reduce the operation of the turbine and thereby assure that the air pressure in the air supply passage does not exceed the preset value.

REFERENCES:
patent: 4505117 (1985-03-01), Matsuoka
patent: 4730457 (1988-03-01), Yamada et al.
patent: 4738110 (1988-04-01), Tateno

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