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. 08, 2015
Filed:
Mar. 23, 2012
Applicant:
Rolf Graf, Glashütten, DE;
Inventor:
Rolf Graf, Glashütten, DE;
Assignee:
Continental Automotive GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 41/22 (2006.01); F02D 41/30 (2006.01); F02D 41/20 (2006.01);
U.S. Cl.
CPC ...
F02D 41/221 (2013.01); F02D 41/3082 (2013.01); F02D 2041/2058 (2013.01); F02D 2041/224 (2013.01); F02D 2041/225 (2013.01); F23N 2023/08 (2013.01); F23N 2027/16 (2013.01); F23N 2031/20 (2013.01);
Abstract
During monitoring of an electromotively driven fuel pump of a fuel feed unit for a motor vehicle, a pump current is monitored as a function of a pump voltage or of a pump rotational speed. Through a comparison of the pump current with the pump voltage or the pump rotational speed, it is detected whether leakage or dry running of the fuel pump is present. The fuel feed unit does not require any pressure sensor for this purpose, and is therefore of particularly simple construction.