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Gas exchange valve and method for manufacturing thereof

A technology of ventilation valve and valve disc, applied in the direction of lift valve, valve device, coating, etc., can solve the problems of poor manufacturing accuracy and manufacturing time, increase manufacturing cost, etc., and achieve the effect of reducing manufacturing cost and time.

Inactive Publication Date: 2010-06-23
MAN B & W DIESEL AS
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0005] Therefore, in order to protect at least the particularly stressed regions of the gas exchange valve parts made of high-temperature-resistant material (in particular the valve disk), in DE 10 2005 013 088 A1 a chrome layer is additionally provided, for example galvanically applied and Followed by grinding, the disadvantage is that it increases the manufacturing cost and makes the manufacturing accuracy and manufacturing time worse

Method used

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  • Gas exchange valve and method for manufacturing thereof
  • Gas exchange valve and method for manufacturing thereof

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Embodiment Construction

[0023] figure 1 The ventilation valve 1 according to the embodiment of the present invention is shown in a longitudinal section. The gas exchange valve (especially an exhaust valve for an internal combustion engine) has a valve disc 3 and a valve stem 2.

[0024] In order to consider the different requirements of heat resistance, fatigue resistance and corrosion resistance in different temperature zones of the gas exchange valve, the valve disc 3 and the lower part of the valve stem 2 are made of high temperature and combustion resistant material NiCr2OTiAl, and The remaining valve stem 2 is made of heat-resistant tool steel X45CrSi9-3, which has low cracking resistance and high fatigue resistance, that is, it has sufficient toughness to withstand the bending stress generated in this area.

[0025] The valve stem 2 is almost completely equipped with an anti-corrosion layer in the form of a carbonitride layer 6 along its circumferential outer surface, wherein the anti-corrosion lay...

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Abstract

A multi-section gas exchange valve (1) used for a self-ignition internal combustion engine especially is provided with a valve disk (3) and a valve rod (2), wherein the gas exchange valve is made of high temperature-resistant material and at least another material, wherein a gas exchange valve component made of the another material is provided with a carbon nitrogen layer (4), and the gas exchange component (3) made of the high temperature-resistant material is also provided with a carbon nitrogen layer (4).

Description

Technical field [0001] The present invention relates to a gas exchange valve (Gaswechselventil) for a self-igniting internal combustion engine, as described in the preamble of claim 1, which has a valve stem and a valve disc (Ventilteller). The invention also relates to a A method for manufacturing such a gas exchange valve. Background technique [0002] The gas exchange valve, that is, the intake valve and / or exhaust valve used to open or close the gas passage of the internal combustion engine, is under high mechanical and thermal load, but also under the corrosive effect of the combustion gas. Here, different gas exchange valve components have different requirements for heat resistance, fatigue resistance and corrosion resistance, especially in different temperature regions. [0003] In order to consider these different requirements, it is known that the valve disc is made of high temperature and combustion resistant materials, and the valve stem is made of other materials with ...

Claims

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Application Information

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IPC IPC(8): F01L3/02F01L3/04C23C8/38C23C8/32
CPCC23C8/36F01L3/02B23P13/00F01L2303/00
Inventor R·库达R·平特纳格尔M·瓦伦塔
Owner MAN B & W DIESEL AS
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