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. 20, 1979
Filed:
Aug. 19, 1977
Norio Shibata, Susono, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
Disclosed is a secondary air control valve device for feeding secondary air controlled in correspondence with the engine load into an exhaust system having a catalytic converter for reducing hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO.sub.x) contained in exhaust gas emitted from an internal combustion engine. The device is simple in construction and can vary the predetermined amount of secondary air in correspondence with the changes of the characteristic of the catalyzer which may vary as the catalyzer is activated, so that the amount of the secondary air is controlled for maintaining the highest converting efficiency for a long duration of use of the vehicle which has this device mounted thereon.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile