The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1990
Filed:
Oct. 03, 1988
Haruyoshi Tsubouchi, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A variable-capacity exhaust gas turbine supercharger comprises a radial turbine and a compressor driven by the turbine. The turbine has a scroll portion divided into an open scroll chamber and a closed scroll chamber. The open scroll chamber directly communicates with an engine manifold and has a nozzle portion facing circumferential portions of turbine blades. The closed scroll chamber communicates with the engine manifold via a change-over valve and has an annular opening opened to rear portions of the turbine blades, and a nozzle portion having a plurality of gas passages defined by stationary guide vanes is provided between the annular opening of the second scroll chamber and the rear portion of the turbine blades.