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:
Jun. 09, 2020
Filed:
Aug. 19, 2016
Method for detecting an unsealed location in a heat recovery system of an internal combustion engine
Avl List Gmbh, Graz, AT;
Iveco S.p.a., Turin, IT;
Fpt Industrial S.p.a., Turin, IT;
Klemens Neunteufl, Graz, AT;
Gerald Gradwohl, Graz, AT;
Helmut Altendorfer, Peilstein/Mühl, AT;
Fabio Cococcetta, Zürich, CH;
Thomas Eckhardt, Romanshorn, CH;
Abstract
The invention relates to a method for detecting an unsealed location in a heat recovery system () of an internal combustion engine () of a motor vehicle. The heat recovery system () has at least one combustible working medium, a working medium circuit () with at least one EGR evaporator (), a pump (), and at least one expansion machine (). The aim of the invention is to allow an early and reliable detection of leakages in the EGR evaporator () of a heat recovery system () in the simplest manner possible. This is achieved in that the internal combustion engine () is operated in the overrun mode, the oxygen concentration in the exhaust gas is ascertained and compared with a defined lower threshold, and if the lower threshold is undershot, a leakage in the EGR evaporator () is detected.