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:
Nov. 10, 2009
Filed:
Feb. 19, 2008
Reina Fukagai, Aichi, JP;
Norikazu Ieda, Ichinomiya, JP;
Masahiro Tanaka, Kasugai, JP;
Hiroshi Inagaki, Komaki, JP;
Kunihiko Takamatsu, Toyota, JP;
Masaki Hirata, Hamamatsu, JP;
Takahiro Suzuki, Hamamatsu, JP;
Reina Fukagai, Aichi, JP;
Norikazu Ieda, Ichinomiya, JP;
Masahiro Tanaka, Kasugai, JP;
Hiroshi Inagaki, Komaki, JP;
Kunihiko Takamatsu, Toyota, JP;
Masaki Hirata, Hamamatsu, JP;
Takahiro Suzuki, Hamamatsu, JP;
NGK Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Suzuki Motor Corporation, Hamamatsu-shi, Shizuoka, JP;
Abstract
A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the interruption of the fuel supply; a response time period accumulating step of determining a response time period by accumulating a first time period that the sensor output value reaches from a first threshold value to a second threshold value after the detection of the interruption of the fuel supply, and a second time period that the sensor output value reaches from a third threshold value to a fourth threshold value after the detection of the restart of the fuel supply after the interruption of the fuel supply; and an abnormal state diagnosing section of determining an abnormal state of the gas sensor when the response time period is greater than a predetermined time period.