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:
Nov. 24, 2015
Filed:
Jul. 02, 2013
Applicant:
Cummins Turbo Technologies Limited, Huddersfield, GB;
Inventor:
Pierre French, Holmfirth, GB;
Assignee:
Cummins Turbo Technologies Limited, Huddersfield, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L 13/06 (2006.01); F02D 9/06 (2006.01); F01D 25/16 (2006.01); F01D 25/18 (2006.01); F02B 37/00 (2006.01); F02B 37/22 (2006.01);
U.S. Cl.
CPC ...
F02D 9/06 (2013.01); F01D 25/16 (2013.01); F01D 25/183 (2013.01); F02B 37/00 (2013.01); F02B 37/22 (2013.01); F05D 2220/40 (2013.01); Y02T 10/144 (2013.01);
Abstract
During engine braking of a turbocharged internal combustion engine, the exhaust gas pressure increases and this is used to pressurize the seals between the turbocharger shaft and the bearing housing so as to prevent oil leakage into the compressor housing. Immediately after engine braking, stored exhaust gas pressure is used to pressurize the seals at the turbine end so as to prevent oil leakage into the turbine housing. In an alternative arrangement the exhaust gas is used to generate a reduced pressure in the bearing housing to increase the pressure gradient across the seals.