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:
Feb. 21, 1995
Filed:
Jan. 28, 1993
Masakatsu Fujishita, Mito, JP;
Takeshi Atago, Katsuta, JP;
Keiichi Mashino, Katsuta, JP;
Suetaro Shibukawa, Katsuta, JP;
Shigeyuki Yoshihara, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering Co., Ltd., Katsuta, JP;
Abstract
A catalyst heating control device for cleaning automotive engine exhaust gases, comprising a generator, at least one battery, a catalyst heating control apparatus, a battery charging device and an electronic fuel injector. Before starting the engine, the catalyst is preheated. At the start of the engine, the catalyst preheat control is curtailed according to the state of the batteries. The catalyst current control is performed by detecting the catalyst activation temperature. The catalyst is heated usually to about 350.degree. C., at which point the current supply for heating is terminated.