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:
Aug. 18, 1992
Filed:
Nov. 30, 1990
Applicant:
Inventors:
Winfried Distelrath, Stuttgart, DE;
Roland-Dieter Zebli, Wurmberg, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B / ; F02B / ;
U.S. Cl.
CPC ...
12318814 ; 123 / ; 123308 ; 123432 ;
Abstract
An intake duct in a cylinder head of an internal-combustion engine has a defined flow profile by which the flow rate of the gas flow is accelerated continuously, specifically up to a first intake duct segment of the intake duct which, as viewed in the flow direction, is situated in front of the valve stem. Subsequently, in a second intake duct segment, the flow rate of the gas flow is reduced continuously, whereby a lower approach flow rate of the valve is achieved. This results in an optimized volumetric efficiency which has a favorable influence on the performance and consumption of the internal-combustion engine.