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:
Mar. 09, 1993
Filed:
Jun. 11, 1992
Applicant:
Inventor:
Kiyoshi Yuuki, Susono, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60284 ; 60286 ; 60300 ; 422174 ;
Abstract
A device for controlling the heating of a catalyzer arranged in the exhaust passage of an engine. When the engine is started, the catalyzer is rapidy heated by the heater, and the time for which the power is supplied to the heater is increased as the catalyzer use period becomes longer, to thus increase the temperature of the catalyzer to the activation temperature thereof when the power supply to the heater is stopped regardless of whether the catalyzer is new or has deteriorated.