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:
Dec. 04, 1990
Filed:
Feb. 20, 1990
Dr. Ing. h.c.F. Porsche AG, , DE;
Abstract
A combined cylinder block and crankcase for a multi-cylinder light-metal alloy internal-combustion engine has partitioning walls between the cylinders. The cylinders are surrounded by cooling-water channels. Combustion cylinder spaces are disposed between the combined cylinder block and crankcase and a cylinder head. In order to ensure that during the operation of the internal-combustion engine the cylinder diameters (adjacent to the combustion spaces) are kept within fixed tolerances specifically in the area of the partitioning walls, thermal-expansions slots are provided in the partitioning walls which lead to the cooling-water channels. These thermal-expansions slots are sealed off with respect to the cooling-water channels so that the partitioning walls are not impaired by cavitation.