Single cylinder or multicylinder block
AssigneeKolbenschmidt Aktiengesellschaft
InventorsGeorg Sick, Peter Everwin, Hans H. Duve
Life of this patent
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Abstract
In a cast linerless single cylinder or multicylinder block made of an aluminum alloy and intended for use in internal combustion engines, the aluminum matrix contains embedded silicon particles, which protrude from the sliding surface of the cylinder. In order to distinctly reduce the cost of the mechanical machining of the entire surface of the single cylinder or multicylinder block, only the sliding surface of the cylinder is constituted by a fibrous body which contains interspersed silicon particles and infiltrated aluminum alloy.
Claims12
In a linerless cylinder block, which is made of an aluminum alloy and has been cast in a metallic permanent mold and is intended for use in internal combustion engines and comprises mechanically smoothed silicon particles which have a size of 20 to 80 .mu.m and are embedded and uniformly distributed in the aluminum matrix and protrude 0.5 to 10 .mu.m from the sliding surface of the cylinder, the improvement wherein the sliding surface of the cylinder is constituted by a hollow-cylindrical fibrous body (3), which is made of ceramic fibers (4) and contains interspersed particles (5) and infiltrated hypoeutectic aluminum alloy (1) and is embedded in the cylinder casting, the particles (5) being selected from the group consisting of particles of at least one of silicon, silicon carbide;
- and carbides;
- nitride and silicides of chromium, tungsten, molybdenum, titanium, niobium and vanadium.
Dependencies are inferred from the claim text.