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:
May. 29, 1979
Filed:
Nov. 09, 1977
Noboru Watanabe, Susono, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
Disclosed is a secondary air feed control device comprising a movable valve and a movable valve seat having a first and a second valve port. The first valve port is connected to the secondary air inlet disposed in the exhaust pipe, while the second valve port is connected to the atmosphere. The movable valve is arranged between the first and second valve ports so as to co-operate with the first and second valve ports. An oxygen concentration detector, providing a detecting signal indicating that the total air-fuel ratio is smaller than the stoichiometric air-fuel ratio, is disposed in the exhaust pipe. The opening area of the first valve port is controlled so as to be increased in accordance with an increase in the level of the load of the engine and in response to the detecting signal when the total air-fuel ratio becomes smaller than the stoichiometric air-fuel ratio.