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Switchable bucket tappet

A technology of cup-shaped tappets and internal components, applied in valve devices, machines/engines, mechanical equipment, etc., can solve problems such as wrong switching, undesirably long switching time, etc., and achieve the effect of simplifying manufacturing and reducing quality

Inactive Publication Date: 2013-12-04
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead, for example, to undesirably long switching times or incorrect switching within the available time slots (base circles) in the event of oil foaming etc.

Method used

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  • Switchable bucket tappet
  • Switchable bucket tappet
  • Switchable bucket tappet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The figures show a controllable cup tappet 1 . The cup tappet has a hollow-cylindrical housing 3 which is closed by a ring-like camming base 2 . A thin-walled bush 5 extends from the outer edge 4 of the camming base 2 . A dome-shaped additional section 7 extends from the inner edge 6 of the camming bottom 2 . The tubular inner part 9 is accommodated with its jacket 37 in the bore 8 of the additional section 7 so that it can move axially relative to the additional section. The inner part 9 has, approximately in its central region, a radial web 38 with a radially passing bore 11 . As can be seen, two diametrically opposite connecting pistons 12 extend in the bore 11 of the inner part 9 . here, in figure 1 , 5 respectively discloses the connection state of the cup tappet 1.

[0023] The above-mentioned connecting piston 12 is acted upon radially outward by the force of a pressure medium 20 , which is designed here as a helical compression spring which acts against it...

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PUM

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Abstract

The invention proposes a switchable bucket tappet (1), having a housing (3), in the bore (8) of which an inner part (9) extends axially movably relative to said bore, wherein two coupling pistons (12) preferably equipped with flattened portions are disposed in a bore (11) of the inner part (9), wherein said pistons can be placed in engagement, in sections, with a respective crescent-like driver surface (13) in the bore (8) of the housing (3) in order to obtain a full valve lift.

Description

technical field [0001] The invention relates to a controllable cup lifter for a valve train of an internal combustion engine, having a housing with a ring-like cam actuating base, a bushing separated from the outer edge of the housing by a hole and separating the hollow-cylindrical additional section from the inner edge of the housing, in which bore an inner part movable axially relative to the housing extends, the underside of which is originally the structure for the gas exchange valve, wherein at least one connecting piston extends in a bore of the inner part, for example a radial bore, which can be engaged in sections with a drive surface of the housing for a complete valve lift, and a lost motion spring is connected between the housing and the inner part work between. Background technique [0002] A cup tappet of this type is known from DE 4492633C1. The connection mechanism of the ring tappet is arranged directly below the bottom region. Those skilled in the art kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/00F01L1/14
CPCF01L2107/00F01L1/143F01L13/0005F01L2307/00F01L1/14F01L13/00
Inventor 米夏埃尔·哈斯马里奥·库尔诺伯特·尼茨克里斯蒂安·迪茨约瑟夫·格勒舍尔
Owner SCHAEFFLER TECH AG & CO KG