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. 03, 1985
Filed:
Jul. 06, 1983
Applicant:
Inventors:
Yoshiki Chujo, Susono, JP;
Hiroshi Noguchi, Gotenba, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B / ; F02B / ;
U.S. Cl.
CPC ...
123440 ; 73 23 ; 204431 ;
Abstract
Pulse current having a certain cycle is supplied to an electric heater in an oxygen sensor for exhaust gas. Duty ratio of this pulse current is controlled in relation to the amplitude of voltage and current applied to the heater to thereby maintain power consumption of the heater per unit time at a constant one. Also this duty may be corrected on the basis of parameters for running an internal combustion engine.