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Method for manufacturing a pressure limiting valve, pressure limiting valve and component of a fuel injection system

A technology for a fuel injection system and a pressure-limiting valve, which is applied in the field of manufacturing pressure-limiting valves, can solve problems involving technical manufacturing costs and occupy overall space, and achieve the effects of reliable pressing, reduction in overall size, and reduction in the number of components

Active Publication Date: 2017-12-08
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two threads that must be used for this purpose also have a separate sealing space, which involves technical manufacturing costs and takes up a corresponding amount of overall space

Method used

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  • Method for manufacturing a pressure limiting valve, pressure limiting valve and component of a fuel injection system

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 Components 124 of a fuel injection system are shown in accordance with an embodiment. Component 124 is, for example, a high-pressure pump, in particular a reciprocating pump. The high pressure pump is especially adapted to deliver fluid such as gasoline or diesel fuel from the fluid tank to the pressure accumulator (also known as the common rail). In the case of gasoline, system pressures of 150 bar or more, for example 250 bar or as much as 350 bar or more, are common in fuel injection systems. Fluid is injected from the pressure accumulator through the injection valve into the combustion chamber of the internal combustion engine to propel the motor vehicle.

[0022] Pressure limiting valve 100 is arranged in component 124 . The pressure limiting valve 100 includes a sleeve 101 . The sleeve 101 extends along a longitudinal axis 102 .

[0023] The fixing pin 103 is arranged inside the sleeve 101 . An elongated securing pin 103 extends along the longitudin...

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PUM

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Abstract

The invention relates to a method for manufacturing a pressure limiting valve (100) of a fuel injection system, comprising the following steps: - providing a housing (115) with a receiving bore (116), said receiving bore (116) having a constant diameter (117) along the longitudinal axis (102) within specified tolerances; - providing a sealing element (108), a spring (105) and a sleeve (101) provided with a retaining pin (103), which (103) protrudes through the chamber (104), which is enclosed by the sleeve (101); - the sealing element (108), the spring (105) and the sleeve (101) provided with the fixing pin (103) ) is arranged in the receiving borehole (116) such that the first end (106) of the spring (105) is supported on the sleeve (101) and the second end (107) is supported on the sealing element (108); ‑ along moving the sleeve (101) relative to the housing (115) along the longitudinal axis (102), thereby changing the bias of the spring (105); 103), whereby the sleeve (101) is plastically deformed so as to press the sleeve (101) against the housing ( 115).

Description

technical field [0001] The invention relates to a method for producing a pressure limiting valve. The invention also relates to a pressure limiting valve for a fuel injection system, in particular for a fuel injection system of a motor vehicle. The invention also relates to a component for a fuel injection system comprising such a pressure limiting valve. Background technique [0002] The injection system of an internal combustion engine of a motor vehicle usually includes a pressure limiting valve. Pressure-limiting valves are integrated, for example, into high-pressure fuel pumps and protect components against excessive fuel pressure in the event of thermal expansion or failure. For example, a pressure limiting valve in a gasoline injection system opens at fuel pressures above 250 bar. The pressure limiting valve then opens the path from the high pressure side to the low pressure side. [0003] In order to guarantee reliable operation of the injection system, very stri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/46
CPCF02M59/48F02M59/46F02M61/20F02M63/005F16K17/0406F16K27/0245
Inventor U.斯泰纳特H-J.科赫
Owner VTESCO TECH GMBH