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Injector and valve base used for injector

An injector and valve seat technology, which is applied to fuel injection devices, machines/engines, engine components, etc., can solve problems such as changes in sealing effect, and achieve stable sealing effect.

Pending Publication Date: 2019-10-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the inevitable presence of particles in the fluid, if these particles remain between the valve seal and the sealing surface of the valve seat, when the valve seal is seated, scratches will be formed on the surface of the sealing surface on the valve seat. Accumulation will gradually change the sealing effect

Method used

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  • Injector and valve base used for injector
  • Injector and valve base used for injector
  • Injector and valve base used for injector

Examples

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Embodiment Construction

[0023] In different drawings, the same or similar parts are indicated by the same reference numerals.

[0024] It should be understood that the drawings are only used to illustrate the present application, and the dimensions, proportions and numbers of the components are not intended to limit the present application.

[0025] see figure 1 As shown, an embodiment of the injector 1 of the present application is used in a common rail system, in particular a diesel injector. figure 1 The injector 1 shown in FIG. 2 includes an injector body 30 in which a valve cavity 301 is opened. There is a receiving surface (not labeled) in the valve cavity 301 , and a valve seat 10 is arranged in the valve cavity 301 to abut against the receiving surface, and is combined with the sealing member 20 and the valve seat 10 to control the opening and closing of the valve.

[0026] see Figure 2 to Figure 3 , which shows an embodiment of the valve seat 10 of the present application. Shoulders 11 ...

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PUM

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Abstract

The invention provides an injector and a valve base used for the injector. The valve base is provided with a seal face used for bearing a seal part, and a cladding material is arranged on the seal face, and comprises a chromium nitride layer and an outer chromium layer located on the outer side of the chromium nitride layer. The injector and the vale base have the stable seal effect.

Description

technical field [0001] The application relates to an injector and its valve seat, especially an injector and its valve seat with a stable sealing effect. Background technique [0002] The injector is used to inject high-pressure fluid into the required space, and there is a valve assembly in the injector to control the opening or closing of the injector. The valve assembly generally has a valve seal and a valve seat, and the valve seal can lean against the valve seat to form a seal, thereby preventing fluid from entering a required space when it is not needed. In addition, when the valve is required to open, the valve seal moves away from the corresponding sealing surface on the valve seat, allowing fluid to enter. In order to achieve precise control, a stable sealing effect between the valve seal and the corresponding sealing surface of the valve seat is necessary. [0003] However, due to the inevitable presence of particles in the fluid, if these particles remain betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18F02M61/16
CPCF02M61/1873F02M61/166F02M61/1886
Inventor 骆海洋徐婧吴宏斐E·塔拉齐徐晓鸣牟卫萍Z·塞朗N·李普曼
Owner ROBERT BOSCH GMBH