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Switchable tappet

A technology of switches and cup-shaped tappets, which is applied to valve devices, machines/engines, mechanical equipment, etc., can solve problems such as complex structures of methods and methods, increased manufacturing costs, and unavailability, and achieves the effect of saving construction costs

Inactive Publication Date: 2007-08-29
SCHAEFFLER KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cylindrical arch again increases manufacturing costs
[0004] On the other hand, the person skilled in the art knows that the known tappets, in particular their inner housings, are relatively complexly constructed in a defective manner
[0005] Furthermore, no measures can be obtained from such documents as to how the tappets implemented there can be produced in an inexpensive manufacturing method

Method used

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  • Switchable tappet
  • Switchable tappet

Examples

Experimental program
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Embodiment Construction

[0031] 1 to 3 show a switchable tappet 1 . The tappet comprises a hollow cylindrical outer housing 2 , which is plugged telescopically and axially displaceably with a cup-shaped inner housing 3 .

[0032] The bottom 4 of the outer housing 2 has a recess 7 which runs through completely diametrically, viewed in the direction of cam movement. Thus, for cam activation, the sector 8 remains on both sides of the recess 7 . The bottom 5 of the inner housing 3 is designed to be closed and rests against the underside 17 of the bottom 4 of the outer housing 2 in the coupled state.

[0033] The bottom part 18 of the inner housing 3 protruding into the recess 7 of the outer housing 2 serves as actuating high-lift cam. In contrast, the sector 8 of the bottom 4 of the outer housing 2 serves here as an actuating low-lift cam.

[0034] As a result, the base 5 of the inner housing 3 extends completely over the entire diameter of the tappet, and there is a large sliding surface for cams with...

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PUM

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Abstract

The invention relates to a switchable tappet (1) in a valve train of an internal combustion engine. The above is made from sheet steel and produced by a deep-drawing method. The tappet (1) is embodied such that the inner body (3) thereof may be operated by a high-lift cam and the outer body (2) thereof by a low-lift cam. Said tappet may be economically produced and when disconnected greater partial lift may be achieved than with the prior state of the art.

Description

technical field [0001] The invention relates to a switchable lifter, in particular a cup lifter for a valve train of an internal combustion engine, comprising a hollow cylindrical inner shell and an outer shell, which are telescopically inserted into each other and can pivot relative to each other. where each housing has a bottom, one of which can be loaded by at least one high-lift cam and the other bottom can be loaded by at least one low-lift or zero-lift cam, for the housings In the coupled state, the coupling element can be partially moved into the corresponding other housing in order to activate a large lift, wherein, in the decoupled state of the housings, the coupling element only extends in the one of the housings in order to Start small lift. Background technique [0002] A similar tappet is known from DE 44 92 633 C1. Its inner housing is in contact with a low-lift cam, whereas its outer housing, which concentrically surrounds the inner housing, is in contact wi...

Claims

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Application Information

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IPC IPC(8): F01L1/14F01L13/00F01L1/25
CPCF01L13/0036F01L1/25F01L13/0005F01L1/143
Inventor M·哈斯L·冯希蒙斯基
Owner SCHAEFFLER KG
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