초록 ▼

An exhaust gas turbine type supercharger in which a casing of a turbine is divided into two chambers along a flow direction of the exhaust gas to form an open scroll and a closed scroll. The open scroll feeds the turbine with the exhaust gas over a full operational range of the engine. The closed sc

An exhaust gas turbine type supercharger in which a casing of a turbine is divided into two chambers along a flow direction of the exhaust gas to form an open scroll and a closed scroll. The open scroll feeds the turbine with the exhaust gas over a full operational range of the engine. The closed scroll is opened to increase a flow rate of the exhaust gas to the turbine when the supercharged pressure is high as in a high load/high speed operation of the engine. A port is formed through a partitioning wall between the open scroll and a downstream exhaust gas passage of the turbine and an opening/closing valve is interposed thereat to thereby bypass the exhaust gas to a downstream portion of the turbine with the port being opened, when the supercharged pressure becomes high.

대표청구항 ▼

An exhaust gas turbine type supercharger for an engine, the supercharger having a turbine and a compressor, a casing means for receiving said turbine, partition wall means for dividing the casing means into two scroll chambers, and means for supplying an exhaust gas to said two scroll chambers to ro

An exhaust gas turbine type supercharger for an engine, the supercharger having a turbine and a compressor, a casing means for receiving said turbine, partition wall means for dividing the casing means into two scroll chambers, and means for supplying an exhaust gas to said two scroll chambers to rotate said turbine and to feed the engine with supercharged air through said compressor, said supercharger comprising a bypass passage means for connecting one of said scroll chambers to a portion downstream of said turbine, a first flow rate control valve means for controlling a flow rate of the exhaust gas passing through said bypass passage means, and a second flow rate control valve means for controlling a flow rate of the exhaust gas being fed to the other of said scroll chambers, and means for controlling said first and second flow rate control valve means in accordance with an electric signal representing an engine RPM corresponding to a supercharged pressure.