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Metallic hollow valve for an internal combustion engine of a utility motor vehicle

A technology for internal combustion engines and metals, applied in metal processing equipment, lifting valves, valve devices, etc., can solve the problems that conventional hollow valves cannot be realized and have not been adopted

Pending Publication Date: 2017-07-28
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional hollow valves have hitherto not been used in utility vehicles since the requirements placed on said valves in utility vehicles with regard to wear resistance and service life are considerably higher than those of the passenger car industry and were hitherto not fulfilled by conventional hollow valves

Method used

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  • Metallic hollow valve for an internal combustion engine of a utility motor vehicle

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Experimental program
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Embodiment Construction

[0021] as evident in figure 1 Yes, the valve stem 2 and the valve head 3 - also known as the valve disc to those skilled in the art - have a common hollow space 4 . The hollow space 4 is partially filled with a fluid, preferably sodium, which is not shown in the figure 1 middle. Stem 2 has an outer diameter d A Greater than 7mm. Preferably, for outer diameter d A The value is between 8mm and 11mm. In addition, the valve stem has an inner diameter d I At least 4.5mm. Preferably, for inner diameter d I The value is between 5mm and 7mm. Particularly preferably, the valve stem has a wall thickness d of between 1.5 mm and 5 mm. Here, the wall thickness is defined as the outer diameter d A and inner diameter d I difference between.

[0022] As further evident in the schematic figure 1 The valve head 3 has a head base 5 facing away from the valve stem 2, which has a base thickness d B Between 2mm and 5mm. Furthermore, the wall thickness d of the valve neck 6 formed bet...

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Abstract

The invention relates to a metallic hollow valve (1) for an internal combustion engine of a utility vehicle. The metallic hollow valve (1) comprises a tubular valve stem (2), which merges into a valve head (3) with an outer diameter that is enlarged with respect to the valve stem (2), the valve stem (2) and the valve head (3) together delimiting a hollow space (4). The valve stem (2) has an outer diameter (dA) of more than 7 mm, and an inner diameter (dI) of at least 4.5 mm.

Description

technical field [0001] The invention relates to a metal hollow valve for an internal combustion engine of a utility vehicle. Furthermore, the invention relates to an internal combustion engine of a utility vehicle having such a metal hollow valve. Finally, the invention relates to a utility vehicle having such an internal combustion engine. Background technique [0002] Increasing heat loads in the internal combustion engines of utility vehicles have made it increasingly necessary to cool central components such as the valves for opening and closing the air inlet and exhaust outlet of the internal combustion engines of these vehicles. It is known from the passenger car industry to design such valves, which are so-called metal hollow valves, which contain a liquid cooling medium inside. It is generally true for metal hollow valves that they have a lower intrinsic weight than solid valves, allowing improved heat dissipation due to the filling of the cooling medium. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/14F01L3/04F16K51/00B23H9/00B23H3/00
CPCB23H3/00B23H9/00F01L3/04F01L3/14F16K51/00F01L3/20F01L3/06F01L2301/00F01L2303/00
Inventor 彼得·克罗斯克里斯托弗·卢维恩亚历山大·普克罗兰·沙赫雷尔
Owner MAHLE INT GMBH