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:
Mar. 11, 1980
Filed:
Jul. 26, 1977
Applicant:
Inventors:
Takao Nonoyama, Toyota, JP;
Takeru Yasuda, Nagoya, JP;
Assignee:
Toyota Jidosha Kegko Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60290 ; 60301 ; 60306 ;
Abstract
A system for purifying exhaust gases of engines by first passing the exhaust gases through a 3-way catalyst in a reducing condition, and secondly through an auxiliary catalyst which accelerates at least the oxidizing reaction in an oxidizing condition, wherein the reducing and oxidizing conditions of the exhaust gases are controlled by a programmed supply of secondary air to the exhaust gases at the upstream sides of the two catalysts, the program for the supply of secondary air being predetermined depending upon operational conditions of the engine, such as the rotational speed and the intake manifold vaccum of the engine.