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. 17, 1981
Filed:
Oct. 02, 1978
Applicant:
Inventors:
Assignees:
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Aisan Industry Co., Ltd., Obu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ; F02M / ;
U.S. Cl.
CPC ...
60276 ; 60289 ; 123589 ;
Abstract
Disclosed is an apparatus for controlling the amount of secondary air fed into an internal combustion engine. This apparatus includes means for causing a sudden change of the level of the absolute pressure signal for driving the secondary air flow control means each time the level of the output voltage of the air-fuel ratio sensor changes. Thus, the equivalent air-fuel ratio is maintained for a long time within a desired range so that the highest purifying efficiency of the three-way catalytic converter can be attained.