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:
Jan. 04, 1983
Filed:
Nov. 19, 1980
Applicant:
Inventor:
Kazuhiko Kitamura, Toyota, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60290 ; 123587 ; 137 85 ;
Abstract
In an exhaust gas cleaning system for an internal combustion engine in which additional air is injected from outside into an engine exhaust manifold by an on-off-duty solenoid valve under control of a microcomputer operating on the partial oxygen pressure in the exhaust gas as detected by an oxygen sensing element, the engine r.p.m. and the exhaust gas temperature, a vacuum control valve adapted to add vacuum signals responsive to variations in the intake manifold vacuum of the engine and throttle opening to the output vacuum signals of the solenoid valve commanding the air injection.