Durable Wear-Resistant Coating for Light Metal Engine Cylinder Bores

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a method for coating the inner surface of a cylinder liner or cylinder made from lightweight metal to create a durable running surface for a piston in an internal combustion engine. The process involves creating specially-shaped recesses, thermal coating, laser cladding, precise machining, and adding lubricant reservoirs to enhance wear resistance and sliding properties.

Use CasesContent extracted from patent full text and abstract with AI.

• Manufacturing cylinder liners for car and truck engines
• Production of lightweight engine blocks with improved durability
• Enhancing the performance of motorcycle or small engine cylinders
• Application in industrial machinery utilizing internal combustion engines
• Retrofitting or servicing existing engines for improved lifespan

BenefitsContent extracted from patent full text and abstract with AI.

• Improved wear resistance and longevity of engine cylinder surfaces
• Enhanced sliding and emergency running properties for pistons
• Increased adhesion and durability of the coating due to mechanical interlocking
• Optimal lubrication due to integrated oil reservoirs
• Lightweight construction through the use of light metals while maintaining durability

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Inventors & Applicants

Patent Abstract

The invention relates to methods for coating an inner surface of a cylinder liner or a cylinder made of a light metal to realize an inner running surface for a piston of an internal combustion engine and coatings designed in such a manner. The methods and coatings are distinguished in particular by the realization of a high-density layer with improved sliding and emergency running properties. For this purpose, in a first step, recesses with undercuts are introduced into the cylinder liner or the cylinder. In a second step, the inner surface of the cylinder liner or the cylinder is thermally coated to form positive connections in the recesses and a bonding layer on the inner surface of the cylinder liner or the cylinder with the connections. In a third step, material is applied to the bonding layer by means of laser cladding. In a fourth step, the laser-clad layer is finished by machining and/or edge layer forming to form an inner running surface of the cylinder liner or the cylinder. Finally, in a fifth step, recesses are introduced into the laser-clad layer as lubricant reservoirs.