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:
Mar. 27, 2018
Filed:
Feb. 26, 2013
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Takao Yokoyama, Tokyo, JP;
Katsuyuki Osako, Tokyo, JP;
Isao Tomita, Tokyo, JP;
Yasuaki Jinnai, Tokyo, JP;
Masaki Tojo, Tokyo, JP;
Satomi Nagae, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
In a variable geometry turbocharger including a variable nozzle mechanism, an object is to enhance safety upon malfunction of the variable nozzle mechanism as well as to improve accuracy in the control of the variable nozzle mechanism by applying a moment that acts on the nozzle vanes in an opening direction securely and stably. A variable geometry turbocharger includes a plurality of nozzle vanesdisposed at predetermined intervals around a rotational shaft center of a turbine wheelso as to surround an outer circumferential side of the turbine wheeland a variable nozzle mechanism configured capable of changing a blade angle of each of the nozzle vanes, each of the nozzle vaneshaving a blade cross-section orthogonal to a nozzle shaftof each nozzle vane, the blade cross-section having: a concave portioncurved into a concave shape on at least a part of a pressure surfaceside, the part being disposed at a trailing edgeside with respect to the rotational center C; and a convex portion at a leading edgeside with respect to the rotational center C, so that a surface shape of the pressure surfaceside is a substantially S-shape having the concave portion and the convex portion across a boundary at a same longitudinal position as the rotational center.