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A kind of composite cam and the method for manufacturing said composite cam

A compound cam and cam technology, applied to cams, elements with teeth, belts/chains/gears, etc., can solve complex and expensive manufacturing problems, and achieve low friction, high wear resistance and good hardness Effect

Inactive Publication Date: 2018-08-07
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known compound cams are typically designed for rolling or sliding engagement and are relatively complex and expensive to manufacture

Method used

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  • A kind of composite cam and the method for manufacturing said composite cam
  • A kind of composite cam and the method for manufacturing said composite cam
  • A kind of composite cam and the method for manufacturing said composite cam

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Embodiment Construction

[0024] according to figure 1 , the compound cam 1 constructed according to the invention for a camshaft 2 of an internal combustion engine has at least two cam profiles 3 and 4 , the other components of which are not shown. The first cam profile 3 is intended for sliding engagement, whereas the second cam profile 4 is intended for rolling engagement, so the compound cam 1 according to the invention is suitable for mixed engagement (sliding and rolling engagement). In order to cope with the respective loads in the area of ​​the first cam profile 3 and the area of ​​the second cam profile 4, several manufacturing methods are proposed below which allow economical production of the compound cam 1 according to the invention with different cam profiles 3, 4 .

[0025] according to figure 1 , the composite cam 1 is set as a casting in an exemplary manner and is cast in a corresponding casting mold 5 , for example a sand mold. In order to be able to make the first cam profile 3 har...

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PUM

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Abstract

The multi-cam (1) has a cam profile (3) designed for sliding gripping, and another cam profile (4) designed for rolling gripping. The former cam profile includes a coating i.e. diamond-like-carbon (DLC) coating, or nitrided. The multi-cam includes a metallic structure in a region of the former cam profile than in a region of the latter cam profile. The multi-cam is hardened in the region of the former cam profile. The multi-cam is designed as a cast part. The metallic structure is hardened in the region of the former cam profile by a quenching iron (6) during casting. An independent claim is also included for a method for manufacturing a multi-cam.

Description

technical field [0001] The invention relates to a compound cam for camshaft construction of an internal combustion engine. The invention also relates to a method of manufacturing said compound cam. Background technique [0002] Compound cams are usually used for switchable cam followers, the first cam profile of the compound cam is engaged in the first switching stage and the second cam profile is engaged in the second switching stage. Known compound cams are typically designed for rolling or sliding engagement and are relatively complex and expensive to manufacture. Contents of the invention [0003] The problem addressed by the present invention is to provide an improved embodiment of a compound cam, which in particular has increased functionality and economical production. [0004] This problem is solved according to the invention by the subject-matter of the independent claims. Advantageous embodiments form the subject of the dependent claims. [0005] The inventio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H53/00B23P15/14
CPCB23P15/14F01L1/047F01L1/08F01L2301/00F01L2303/00F01L2305/00F16H53/08F01L13/0047
Inventor 罗兰·凯泽米夏埃尔·克赖斯格马库斯·莱特曼法尔克·施奈德韦尔特·克赖普莱特
Owner MAHLE INT GMBH