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. 19, 1991
Filed:
Feb. 14, 1990
Franz Schweinzer, Graz, AT;
Hans Maier, Graz, AT;
Abstract
In a valve-controlled internal combustion engine with direct fuel injection and a swirling air charge, a combustion chamber is located in the piston and is configured as a toroidal part ending in a throat-like cylindrical part towards the piston top. A narrow, ring-shaped overflow passage leads from the toroidal part to the cylindrical part of the combustion chamber. The proposal is put forward that the thermal and fluid-mechanical parameters be improved by placing the axis of the combustion chamber between the tip of the injection nozzle and the cylinder axis, and by varying the width of the ring-shaped overflow passage. The narrowest part of said overflow passage lying in the area closest to the tip of the nozzle, and further, the top of the center part is unsymmetrical, with a minimum distance to the injection jets at upper dead center of the piston.