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:
May. 30, 1989
Filed:
May. 20, 1988
Applicant:
Inventors:
Panagiotis Adamis, Wolfsburg, DE;
Alfred Beier, Braunschweig, DE;
Assignee:
Volkswagen AG, Wolfsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123432 ; 123 / ; 1231 / ;
Abstract
In the embodiment of the invention described in the specification, two inlet valves associated with a cylinder of an internal combustion engine are supplied through two separate inlet lines. One of the inlet valves is supplied with air and fuel at all engine speeds, and the other inlet valve is supplied with supplementary air at higher engine speeds only. The valve opening curves are so chosen that gas return flows are avoided in the case of the gas and air inlet valve, and a scavenging effect is achieved by maintaining the supplementary air inlet valve open for a longer time.