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Valve body comprising a polyconical geometry on the valve seat

A geometry and valve seat technology, applied in the field of valve bodies with a multi-cone geometry on the valve seat, can solve problems such as drift in injection volume and undesired changes in switching performance.

Inactive Publication Date: 2010-12-08
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the change of the hydraulically active surface in the seat area of ​​the solenoid valve, the force relationship acting on the valve needle also changes, which will lead to an undesired change in the switching performance of the solenoid valve during its working life and thus the injection quantity. the drift

Method used

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  • Valve body comprising a polyconical geometry on the valve seat
  • Valve body comprising a polyconical geometry on the valve seat
  • Valve body comprising a polyconical geometry on the valve seat

Examples

Experimental program
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Embodiment Construction

[0020] figure 1 An embodiment of the multi-cone geometry proposed according to the invention in the seat area of ​​an I-valve is shown.

[0021] A solenoid valve 1 , for example a diesel solenoid valve used in a high-pressure fuel injection system, comprises a valve body 2 and a valve element 3 , which is guided in the valve body and forms a valve needle 3 . The valve element 3 and the valve body 2 are formed symmetrically with respect to a line of symmetry. The valve seat area between the valve body 2 and the valve needle 3 is designated with reference numeral 5 . In the closed state of the valve needle 3 a valve with a high pressure P HD A region of high pressure 6 with a low pressure P ND The low pressure areas 7 are isolated from each other.

[0022] exist figure 1 In the shown embodiment of the valve area 5, a sealing edge 8 is formed by the diameter 25 (d S )to make sure. A seat angle difference 18 is formed in the first conical surface 20 . The seat angle differ...

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Abstract

The invention relates to a valve (1) for controlling highly pressurized liquids. Said valve (1) comprises a valve seat zone (5) where a high-pressure zone (6, 23) and a low-pressure zone (7) can be connected to or disconnected from each other. A seat surface (29) for a conical valve member (3) is embodied on a valve body (2), said seat surface (29) extending in a slanted manner within the valve body (2). The conical valve member (3) is provided with a polyconical geometry (19) in the valve seat zone (5). Said polyconical geometry encompasses at least one first conical surface (20) and a second conical surface (21) which are provided with different cone angles (18, 18a, 27, 28).

Description

technical field [0001] For example, in fuel injection systems for mixture compression or compression ignition internal combustion engines, solenoid valves are currently used to control the fuel quantity. In the closed state of the solenoid valve they serve to prevent fuel from flowing out of a closed volume. In the open state, fuel will instead be allowed to pass through. Such valves, for example when used in fuel injection systems for direct-injection internal combustion engines, must have high system pressures, which are on the order of greater than 1500 bar. The valve seat formed on these valves is machined with a single cone in the embodiment of the I valve (inwardly opening configuration) or the A valve (outward opening configuration). Background technique [0002] Valves used in fuel injection systems of compression-ignition internal combustion engines are becoming smaller and smaller for reasons of installation space, whereas the required system pressure has a stron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/18F02M61/08F16K1/38
CPCF02M61/1886F02M61/1866F02M61/08F16K1/38F02M63/0077F02M61/1873
Inventor 内斯特·罗德里格斯-阿马亚海因茨·斯图策恩贝格尔安德烈亚斯·杜特伯恩哈德·亨克尔
Owner ROBERT BOSCH GMBH