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. 24, 1987
Filed:
Sep. 09, 1983
Applicant:
Inventors:
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
123 9016 ; 123315 ; 123348 ; 123432 ;
Abstract
In an internal combustion engine having a pair of intake valves, the valve driving system for timing the intake valves is provided with a valve timing changing mechanism for changing the timing of at least one of the intake valves. The valve timing changing mechanism retards or advances the timing of said one intake valve to change the total intake valve opening time, i.e., the time that at least one of the intake valves is open, according to the operating condition of the engine.