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. 30, 2008
Filed:
Aug. 02, 2006
Atsushi Izumiura, Saitama-ken, JP;
Daisuke Sato, Saitama-ken, JP;
Eisaku Gosyo, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A failure determination system for determining failures of temperature sensors, which is capable of easily and accurately determining failures of the sensors in actual operating temperature ranges thereof, even when the ranges are different from each other. Temperatures detected by exhaust gas temperature sensors are stored as initial temperatures when the engine has stopped. Temperatures detected by the respective sensors after stoppage of the engine are made dimensionless based on the corresponding initial temperatures to thereby calculate dimensionless values. An estimated dimensionless value of a temperature to be detected when each sensor is normal is set in advance as an estimated normal value. Failures of the sensors are determined based on results of comparisons of the dimensionless values with the estimated normal value.