Patent · US Expired

Cylinder block and crankcase

US4974569A · kind A · utility

8Cited by

2References

20Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Herbert Ampferer · Sachsenheim, DE
Rudolf Grandhuber · Neu-Ulm, DE
Thomas Brachert · Wiernsheim, DE

Key dates

Filing date	Feb 20, 1990
Grant date	Dec 4, 1990
Priority date	—
Expiry date	Feb 20, 2010

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F7/0007
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.