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Injector arrangement having a thermal protection sleeve

A technology for thermal protection and injectors, which is applied in the direction of fuel injection devices, engine components, machines/engines, etc., can solve problems such as damage to liquid injectors, achieve the effects of improving heat shielding, realizing tolerance compensation, and avoiding damage

Active Publication Date: 2018-07-17
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But high temperatures can damage liquid injectors

Method used

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  • Injector arrangement having a thermal protection sleeve
  • Injector arrangement having a thermal protection sleeve
  • Injector arrangement having a thermal protection sleeve

Examples

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Embodiment Construction

[0022] In the following, refer to Figures 1 to 3 The injector assembly 1 and the internal combustion engine 100 according to the preferred embodiment of the present invention are described in detail.

[0023] as from figure 1 and figure 2 As can be seen in the figure, the injector assembly 1 includes a liquid injector 2 , a thermal protection sleeve 3 and a gas injector 101 .

[0024] The thermal protection sleeve 3 partially surrounds the liquid injector 2, wherein, from figure 2 It can be seen that the region of the liquid injector 2 facing the combustion chamber 7 is surrounded by the thermal protection sleeve 3 .

[0025] The heat protection sleeve 3 has a base region 30 , a first peripheral region 31 and a second peripheral region 32 . A cylindrical opening 33 is provided in the bottom region 30 .

[0026] From image 3 It can be seen that the spray openings 20 of the liquid injectors 2 are arranged in the region of the openings 33 of the thermal protection sleev...

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PUM

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Abstract

The present invention relates to an injector arrangement, comprising a liquid injector (2) for injecting a liquid, and a thermal protection sleeve (3), wherein the liquid injector (2) is arranged at least partially in the thermal protection sleeve (3), wherein the thermal protection sleeve (3) has a bottom region (30) with an opening (33), wherein a spray hole (20) of the liquid injector (2) is arranged in the region of the opening (33), wherein the thermal protection sleeve (3) has a first casing region (31) which is arranged on a first diameter (D1) and a second casing region (32) which is arranged on a second diameter (D2), wherein the first diameter (D1) is smaller than the second diameter (D2), and wherein at least the first casing region (31) is connected to the bottom region (30).

Description

technical field [0001] The present invention relates to an injector assembly having a thermal protection sleeve to protect the injector from excessive thermal loads. The invention also relates to an internal combustion engine having an injector for liquid fuel and an injector for gaseous fuel. Background technique [0002] Gaseous fuels such as natural gas have always been of interest in recent years due to cost advantages. Often, for reasons of extended driving distances and system redundancy, there is the possibility that the vehicle can be operated on liquid fuels in addition to gaseous fuels. In this case, internal combustion engines usually have injectors for liquid fuels in addition to gas injectors for injecting gaseous fuels. Liquid injectors are not used when running purely on gaseous fuel. In this case, fuel fills but does not flow through the injector so that heat cannot be removed from the injector by injecting liquid fuel. Since the liquid injectors are arra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M53/04F02M61/14
CPCF02M53/046F02M61/14F02D19/027
Inventor D·普费弗勒H·登茨W·哈雷尔C·斯泰因布雷歇尔
Owner ROBERT BOSCH GMBH
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