Method for producing a pressure-limiting valve, pressure-limiting valve, and component for a fuel injection system
A technology for a fuel injection system and a pressure-limiting valve is applied in the field of manufacturing pressure-limiting valves, which can solve problems involving technical manufacturing costs, occupying overall space, and the like, and achieve the effects of reliable pressing, overall size reduction, and weight reduction.
Active Publication Date: 2016-03-09
VTESCO TECH GMBH
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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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Embodiment Construction
[0021] The figure shows components 124 of a fuel injection system according to 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 longitudinal axis 1...
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The invention relates to a method for producing a pressure-limiting valve (100) for a fuel injection system, having the following steps: - providing a housing (115) with a receiving bore (116), which has a diameter (117) that remains constant within specified tolerances along a longitudinal axis (102), - providing a sealing element (108), a spring (105), and a sleeve (101) with a fixing pin (103) which protrudes through a cavity (104) that is surrounded by the sleeve (101), - arranging the sealing element (108), the spring (105), and the sleeve (101) with the fixing pin (103) in the receiving bore (116) such that a first end (106) of the spring (105) is supported on the sleeve (101) and a second end (107) is supported on the sealing element (108), - moving the sleeve (101) relative to the housing (115) along the longitudinal axis (102) and thereby changing the bias of the spring (105), - moving the fixing pin (103) along the longitudinal axis (102) relative to the sleeve (101) and thereby plastically deforming the sleeve (101) in order to press the sleeve (101) into the housing (115) when a value of the bias of the spring (105) corresponds to a specified value of the opening pressure for the pressure-limiting valve (100).
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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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