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. 26, 1980
Filed:
Apr. 26, 1978
Applicant:
Inventor:
Motohisa Miura, Toyota, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60290 ; 60277 ;
Abstract
An air switching valve for controlling supply of secondary air to an exhaust system of an engine closes an air release port thereof to increase an amount of secondary air to be supplied at least at an initial stage of an engine acceleration operation. The air switching valve closes a secondary air supply line to stop the supply of the secondary when the engine acceleration operation continues for more than a predetermined time period, thus to prevent an exhaust gas purifier disposed in the exhaust system from over-heat.