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. 27, 2018
Filed:
Jun. 15, 2015
Kyosan Denki Co., Ltd., Koga, Ibaraki-pref., JP;
Denso Corporation, Kariya, Aichi-pref., JP;
KYOSAN DENKI CO., LTD., Koga, JP;
Abstract
A fuel-filter abnormality detection device is used for a subject filter provided in a fuel supply device of an engine to filtrate a fuel. The fuel-filter abnormality detection device includes a first filter attachable downstream of the subject filter in fuel flow. A filtration capacity of the first filter is smaller than a filtration capacity of the subject filter, and the first filter traps a foreign matter on a downstream side of the subject filter to cause a change in fuel pressure indicating an abnormality of the subject filter. The fuel-filter abnormality detection device may include a bypass passage through which the fuel bypasses the first filter, a bypass control valve configured to allow the fuel to flow through the bypass passage when the abnormality of the subject filter is detected, and a second filter filtrating the fuel flowing through the bypass passage.