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:
Feb. 23, 2021
Filed:
Nov. 14, 2018
Applicant:
Honda Motor Co., Ltd., Tokyo, JP;
Inventors:
Hiroki Ishikawa, Wako, JP;
Michinori Tani, Wako, JP;
Ikue Habu, Wako, JP;
Daijiro Nakamura, Wako, JP;
Assignee:
Honda Motor Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02M 25/08 (2006.01); G01M 15/09 (2006.01);
U.S. Cl.
CPC ...
G01M 15/09 (2013.01); F02M 25/089 (2013.01); F02M 25/0818 (2013.01);
Abstract
A blockage detection device opens a purge valve in a state where a negative pressure pump is operated. The negative pressure pump is connected to a downstream side of a canister with respect to a fuel tank, and reduces pressure in a device internal space. The blockage detection device calculates gas information (volume V, for example) of the device internal space on the basis of variation of internal pressure before and after the purge valve is opened. The blockage detection device detects a blockage in a vent line using the calculated gas information.