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Joint connection structure

A joint connection and construction technology, applied to engine components, machines/engines, charging systems, etc., can solve problems such as parts falling, and achieve the effect of ensuring connection reliability

Active Publication Date: 2021-04-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the joint described in Patent Document 1, at least the main body and the joint cover are composed of separate parts, and when the internal combustion engine is connected to the fuel injection valve, there is a possibility that a certain part may fall.

Method used

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Embodiment Construction

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in this specification and drawings, the same code|symbol is attached|subjected about the structural element which has substantially the same functional structure, and repeated description is abbreviate|omitted.

[0032]

[0033] First, an example of a fuel injection system for an internal combustion engine to which the coupling structure of the present embodiment can be applied will be described. figure 1 It is a schematic diagram showing an example of a fuel injection system of an internal combustion engine.

[0034] The fuel injection system 80 includes a fuel tank 82 , a feed pump 84 , a high-pressure pump 83 , a common rail 86 , and a fuel injection valve 11 . Examples of the internal combustion engine using the fuel injection system 80 include a diesel engine and a gasoline engine.

[0035] The feed pump 84 pressure-feeds the fuel...

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PUM

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Abstract

Provided is a joint connection structure configured to be able to insert one integrated component into a joint insertion hole so that connection to a fuel injection valve is easily performed, and connection reliability is ensured. In the first state where two legs (61a, 61b) of a clamping part (60) are located at the first phase position with a relatively short diameter in a cylindrical part (47), the connector (30) equipped with the clamping part (60) can be inserted into a connector insertion hole (14a). In the second state whee the connector (30) equipped with the clamping part (60) is inserted into the connector insertion hole (14a) and the two legs (61a, 61b) are located at the second phase position of the relatively long diameter of the cylinder part (47), the two leg parts (61a, 61b) are engaged with an inner peripheral engagement part (14b), and the connector (30) is fixed to the connector insertion hole (14a).

Description

technical field [0001] The present invention relates to a joint connection structure for connecting a joint of a fuel pipe to a fuel injection valve. Background technique [0002] A fuel injection valve used in a common rail system of an internal combustion engine injects fuel into the internal combustion engine by opening and closing an injection hole via a valve body in a state where high-pressure fuel pressure-fed from the common rail is introduced into the fuel injection valve. A part of the pressure-fed high-pressure fuel flows into the pressure control chamber of the fuel injection valve, and the part is released from the pressure control chamber, whereby the valve body retreats and the injection hole is opened. In addition, a part of the pressure-fed high-pressure fuel is supplied to the sliding portion in the fuel injection valve to function as lubricating oil. The fuel released from the pressure control chamber and the fuel used as lubricating oil are returned to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/00
Inventor 藤井将太
Owner ROBERT BOSCH GMBH