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. 03, 2015
Filed:
Sep. 26, 2011
Pierre Barthelet, Thaon les Vosges, FR;
Emmanuel Severin, Thaon les Vosges, FR;
Nicolas Morand, Vosges, FR;
Denis Jeckel, Epinal, FR;
Dominique Petitjean, Julienrupt, FR;
Philippe Arnold, Hennecourt, FR;
Karl-heinz Bauer, La Rippe, CH;
Pierre Barthelet, Thaon les Vosges, FR;
Emmanuel Severin, Thaon les Vosges, FR;
Nicolas Morand, Vosges, FR;
Denis Jeckel, Epinal, FR;
Dominique Petitjean, Julienrupt, FR;
Philippe Arnold, Hennecourt, FR;
Karl-Heinz Bauer, La Rippe, CH;
Honeywell International Inc., Morristown, NJ (US);
Abstract
A variable nozzle for a turbocharger includes a plurality of vanes rotatably mounted on a nozzle ring and disposed in a nozzle flow path defined between the nozzle ring and an opposite nozzle wall. Either or both of the faces of the nozzle ring and nozzle wall include(s) grooves extending substantially transverse to a general flow direction of the flow through the nozzle, and there are clearances between the ends of the vanes and the adjacent faces. Leakage flow through the clearance between the end of each vane and the adjacent face having the grooves must proceed across the grooves, and thus a labyrinthine flow passage is presented to the leakage flow. The labyrinthine passage has a greater resistance to flow than would be the case without the grooves. Accordingly, leakage flow is reduced, which is beneficial to turbine efficiency.