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:
Oct. 05, 1976
Filed:
Jul. 15, 1974
Kenji Goto, Susono, JA;
Norikatsu Ishikawa, Susono, JA;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Abstract
Herein disclosed in an exhaust gas cleaning system for an internal combustion engine. The cleaning system comprises a change-over valve having its inlet port communicating with an air pump, its first outlet port communicating with the exhaust system of the engine and its second outlet port communicating with the intake system of the engine through a flow control valve. The change-over valve has communication of its outlet ports switched in accordance with the temperature of a catalytic converter which is disposed in the exhaust system. In a modification, a duct providing communication between the second outlet port of the change-over valve and the flow control valve is provided to communicate with the exhaust system.