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:
Sep. 09, 1986
Filed:
May. 22, 1984
Yoshinori Okino, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An intake system for an internal combustion engine has a primary intake passage and a secondary intake passage both leading to a combustion chamber and respectively having a primary fuel injecting valve and a secondary fuel injecting valve. A control valve is provided in the secondary intake passage for closing the same under light load engine operation and opening the same under heavy load engine operation so that the intake mixture is introduced into the combustion chamber only through the primary intake passage under light load engine operation and through both the primary and secondary intake passages under heavy load operation. A control unit is provided for operating the primary and secondary fuel injecting valves in accordance with the engine operating condition so that fuel is injected only through the primary fuel injecting valve under light load operation. The control unit functions to decrease the quantity of fuel supply for a predetermined time period when it is detected that the fuel supply through the secondary fuel injecting valve is interrupted to thereby prevent the mixture from being momentarily enriched.