Patent ID: 6141965
Filing Date: 2000-11-07
Classification: F02B,G05F,Y02T

Abstract:
A charge air system connected with the intake manifold of a four-cycle internal combustion engine, comprising a charge air compressor capable of supplying the internal combustion engine's charge air requirements only up to about 2500 rpm, said charge air compressor having an inlet and an outlet, an electric motor connected to drive said charge air compressor, a turbocharger having an exhaust gas driven turbine connected with the exhaust from the four-cycle internal combustion engine and a turbocharger compressor having an air inlet and a compressed charge air outlet, a cooler having an inlet connected with the compressed charge air outlet of said turbocharger compressor and a first charge air conduit connected with an outlet of said cooler, a second charge air conduit connected with ambient atmosphere, a junction for said first and second charge air conduits, a third charge air conduit connectING said junction of said first and second charge air conduits with the inlet of the charge air compressor, and a charge air check valve operable to open said second charge air conduit upon operation of said charge air compressor and to close said second charge air conduit upon operation of said turbocharger at high engine speeds.