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External part of a switchable bucket tappet

A cup-shaped tappet and external component technology is applied in the external field of a connectable cup-shaped tappet used in a valve mechanism of an internal combustion engine, which can solve the problems of high cost and high processing cost, achieve high sealing gap and reduce hydraulic oil loss. , the effect of reducing processing costs

Inactive Publication Date: 2008-04-09
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All in all, the processing of the aforementioned external parts is unnecessarily expensive, which leads to unnecessarily high costs in mass production

Method used

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  • External part of a switchable bucket tappet
  • External part of a switchable bucket tappet
  • External part of a switchable bucket tappet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] 1-4 show an outer part 1 for a connectable cup tappet, which is advantageously produced with all its components by metal injection molding (MIM) or precision casting.

[0027] The outer part 1 has a hollow-cylindrical skirt 2 , which can be arranged via its outer shell 3 in a receiving bore of the cylinder head. The skirt 2 is delimited on its cam-side end face 4 by a cylindrically arched base 5 in the direction of cam movement, here serving as the cam running surface.

[0028] Extending from the inner edge 6 of the base 5 in the direction away from the cam is a guide sleeve 7 with a hole 8 . An inner part of a connectable cup tappet can be arranged in this bore 8 . The inner part can, but does not have to, have hydraulic play compensation.

[0029] A first web 9 extends axially below the base 5 through the diameter of the outer part 1 . The web has a guide opening 10 in which at least one coupling element which can be hydraulically loaded in the direction of movemen...

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PUM

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Abstract

The invention relates to an external part (1) of a switchable bucket tappet, whereby the principle elements thereof, such as the webs (9, 18) and channels (13, 14a) are produced by metal injection moulding (MIM) for forming an individual piece in the vicinity of the end. As a result, the external part (1) can be produced in an economical manner and metal-cutting post-work is essentially unnecessary. Also, a separate sheet metal part for forming hydraulic agent channels is not required.

Description

technical field [0001] The invention relates to a connectable cup tappet outer part for a valve train of an internal combustion engine, having a hollow cylindrical skirt which can be accommodated via its housing in a guide hole in a cylinder head of an internal combustion engine, the skirt being located in the cylinder head of an internal combustion engine Its end face on the cam side is limited by a bottom as the cam rolling surface, wherein a guide sleeve extending from the inner edge of the bottom in the direction away from the cam is distributed concentrically with the skirt, and the sleeve is equipped with a cup for the spring. Bore of the rod inner part, wherein the skirt is connected to the guide sleeve via a first web extending on the diameter of the outer part and distributed axially below the base, wherein a guide hole is provided for at least one sliding valve In the coupling part, the first web is laterally tangent to the delivery hole for hydraulic oil in the radi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/25F01L1/14
CPCF01L1/25F01L1/143F01L1/14
Inventor 诺伯特·盖耶露西娅·欣科夫斯卡马里奥·库尔霍尔格·佩措尔德
Owner SCHAEFFLER TECH AG & CO KG