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Piston with ring carrier and glass piston

A technology of bearing parts and pistons, applied in the direction of pistons, cylindrical pistons, plungers, etc., can solve the problems of reducing the service life of pistons, the danger of thermal tension, etc., and achieve the effect of avoiding alternating loads

Inactive Publication Date: 2018-06-12
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In known pistons with glass windows or glass pistons, the danger of thermal tension exists and, as a further consequence, cracks in the glass pistons can be caused by the difference between glass pistons, usually made of quartz glass or sapphire glass, and those made of steel or aluminium. different thermal expansions between the annular carriers of the

Method used

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  • Piston with ring carrier and glass piston
  • Piston with ring carrier and glass piston
  • Piston with ring carrier and glass piston

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Embodiment Construction

[0028] In the following elaboration, functionally identical parts are provided with identical reference symbols.

[0029] In the illustrated exemplary embodiment, the piston 1 according to the invention has an annular carrier 2 , for example made of steel, and a glass piston 3 connected to the annular carrier 2 , Made of sapphire glass or quartz glass, said glass piston 3 adjoins a combustion chamber B identified with the reference symbol B in the mounted state of the internal combustion engine. The "combustion chamber side", that is to say the part and area facing the combustion chamber B is identified below as "gas pressure side" - correspondingly, the glass piston 3 has a front part 3a on the gas pressure side and a rear part 3b facing away from the gas pressure side. The annular carrier 2 is embodied as a substantially hollow cylinder and has an inner and an outer surface.

[0030] The connection between the glass piston 3 and the ring carrier 2 can be implemented in a ve...

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PUM

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Abstract

The invention relates to a piston (1), comprising a ring carrier (2) and a glass piston (3) for observing processes in a combustion chamber (B) of an internal combustion engine, wherein the glass piston (3) is placed upon the ring carrier (2) and is securely connected thereto in the region of an inner casing surface (8) of the ring carrier (2). In order to avoid overly high heat strain in the glass piston (3), the glass piston (3) is connected to the ring carrier (2) via at least one form-fit connection (20), and preferably via a force-fit connection (30).

Description

technical field [0001] The invention relates to a piston with an annular carrier and a glass piston for observing processes in a combustion chamber of an internal combustion engine, wherein the glass piston is arranged on the annular carrier and It is fixedly connected to the annular carrier in the region of the inner surface. Background technique [0002] It is known to provide pistons with viewing windows or glass pistons to enable visual observation of processes in the combustion chamber. Various pistons with glass windows or glass pistons are known from documents JP2009-209752A2, EP1820948A1, DE602005004482T2, WO05 / 121538A1, LU90747A1, JP10142106A, AT392351B, JP54-047016A2 and US2,919,688A. The glass window or glass piston is usually connected to the ring carrier via an adhesive bond. [0003] In known pistons with glass windows or glass pistons, the danger of thermal tension exists and, as a further consequence, cracks in the glass pistons can be caused by the differe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00F02F3/28
CPCF02F3/0084F02F3/0015F02F3/285F16J1/006F16J1/01
Inventor E·温克尔霍弗C·休伯F·纽曼
Owner AVL LIST GMBH