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. 05, 2002
Filed:
Sep. 22, 1999
Applicant:
Inventors:
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 1/02 ;
U.S. Cl.
CPC ...
H05B 1/02 ;
Abstract
An apparatus for controlling operation of a heater has an internal resistance detector for detecting an internal resistance value of an oxygen sensor, and a control unit for estimating a surface temperature of the oxygen sensor based on the internal resistance value detected by the internal resistance detector, then estimating a temperature of the exhaust pipe based on the estimated surface temperature of the oxygen sensor and controlling the operation of the heater, which is combined with the oxygen sensor in a single unit, when the estimated temperature of the exhaust pipe has reached a predetermined temperature.