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Valve gear of an internal combustion engine

一种阀动装置、内燃机的技术，应用在阀装置、机器/发动机、机械设备等方向，能够解决高制造成本、损耗功率降低、有效性不够等问题

Active Publication Date: 2008-11-12
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these measures are not sufficient in their effectiveness, or lead to undesirably high manufacturing costs in the case of welded tabs, especially when the valve stem is contacted by the combined loading of high sliding speeds and contact pressures as well as contaminated lubricating oil
Measures for significantly reducing the power loss due to friction in the stem contact, in addition to always sufficient protection against wear, have not yet been disclosed

Method used

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  • Valve gear of an internal combustion engine
  • Valve gear of an internal combustion engine
  • Valve gear of an internal combustion engine

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Embodiment Construction

[0030] The same reference numerals in the figures denote identical or functionally identical components, without providing any counterparts in this regard.

[0031] FIG. 1 shows a valve actuator 1a of an internal combustion engine formed as a lever valve actuator, with a valve operating member 4 actuated by a cam 2 and formed as a valve rocker 3a, which is supported at one end on a support 6, which It is mounted stationary in the cylinder head 5 of the internal combustion engine and moves in pivoting motion with hydraulic valve play compensation. The contact surface 8 for the end surface 9 on the valve stem 10 of the gas exchange valve 11 is distributed on the end section 7 opposite the support part 6 and materially connected to the valve rocker 3 a. The forces transmitted from the contact surface 8 to the end surface 9 for actuating the gas exchange valve 11 in its opening and closing direction, especially at high rotational speeds of the internal combustion engine, result in...

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Abstract

The invention relates to a valve gear of an internal combustion engine, said valve gear comprising a gas exchange valve (11) and a valve actuating element (4) provided with a contact surface (8) for a front surface (9) on a valve rod (10) of the gas exchange valve (11) actuated by the valve actuating element (4) in the opening and closing direction. According to the invention, the contact surface (8) and / or the front surface (9) are provided with a wear protection layer (12) consisting of at least one metal-free amorphous hydrocarbon layer containing sp<2-> and sp<3-> hybridised carbon.

Description

technical field [0001] The invention relates to a valve actuator of an internal combustion engine with a gas exchange valve and a valve operating element having contact with an end face on a valve stem of a gas exchange valve actuated by the valve operating element in opening and closing directions noodle. Background technique [0002] Depending on the construction of the valve actuator, the contact between the contact surface of the valve actuating element and the end face of the valve stem, hereinafter referred to as the stem contact, is subjected to high mechanical loads which cause either one or both surfaces of the contact partner to Premature wear on the valve body also significantly increases unwanted valve train friction. In the case of a lever valve actuator, therefore, the contact surface of the valve actuating element which causes the rotational movement slides on the end surface of the valve stem which moves linearly. But in this respect, despite the high slidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/16F01L1/18F01L1/20F01L1/24F01L1/25
CPCC23C16/26C23C14/0605F01L1/16F01L1/18F01L1/20F01L1/24F01L1/25F01L2101/00F01L2105/00F01L2301/00F01L2305/00
Inventor 奥利弗·施内尔蒂姆·马蒂亚斯·赫泽费尔德
Owner SCHAEFFLER TECH AG & CO KG
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