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:
Jul. 10, 2001
Filed:
Dec. 28, 1999
Kenji Itoh, Tochigi-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
An exhaust manifold integrally cast with a turbine housing for a turbocharger has pipe portions having exhaust gas flow paths and a plurality of ports adapted to receive an exhaust gas; flanges respectively extending from the ports; a converged portion connected to the pipe portions and adapted to converge the exhaust gas flow paths in the pipe portions; and a turbine housing integrally connected to the converged portion and having a circular exhaust gas flow path therein. The exhaust gas flow path in the converged portion is in a tangent direction relative to the circular exhaust gas flow path in the turbine housing. A neck portion that connects an outer surface of the turbine housing to an outer surface of the converged portion at a particular angle has a radius of curvature that is relative to the distance in a tangent direction of the exhaust gas flow path from the center of the turbine housing to the converged portion. Namely, the ratio of the radius of the curvature to the distance in the tangent direction of the exhaust gas flow path from the center of the turbine housing to the converged portion is 0.13 or more.