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:
Sep. 24, 2013
Filed:
Dec. 12, 2008
Per-åke Bligård, Göteborg, SE;
Vinka Miketa, Göteborg, SE;
Göran Olsson, Göteborg, SE;
Volvo Lastvagnar AB, Göteborg, SE;
Abstract
A diagnostic method for an exhaust pressure regulator provided in an exhaust system connected to a turbocharged internal combustion engine includes demanding engine brake, measuring a back pressure in the exhaust system by a back pressure sensor provided between the exhaust pressure regulator and a turbo unit when demanding engine brake, measuring the boost pressure by a boost pressure sensor provided in the inlet manifold when demanding engine brake, comparing the measured back pressure and the measured boost pressure with stored back pressure and boost pressure values in order to determine whether there is a defective pressure regulator or a defective backpressure sensor. A diagnostic apparatus for an exhaust pressure regulator provided in an exhaust system connected to a turbocharged internal combustion engine is also provided.