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Valve system

A reversing valve and pilot technology, applied in the field of valve system, can solve the problems of limitation and high cost of equipment technology

Inactive Publication Date: 2014-05-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of such ballistic valves is that they are only suitable for limited flow rates or require high technical outlay for the installation

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0079] figure 1 A cross-sectional view of an embodiment of a pilot-controlled ballistic directional valve of a valve system according to the invention is shown. The directional control valve has a main stage 1 and a pilot control stage or pilot stage 2 . The pilot stage 2 has a pilot control piston or pilot piston 4, which in the figure 1 is shown in its basic position. The pilot piston 4 is displaceable in two directions along the longitudinal axis 6 . For this purpose, the pilot piston 4 is prestressed in its basic position in the housing or pilot housing 8 of the pilot control stage by means of two return springs 10a, 10b acting along the longitudinal axis 6 and can be moved by two pilot magnets 12a. , 12b are moved such that the pump connection P' is connected either to the first control channel A' or to the second control channel B'. The respective further control channel A' or B' is discharged towards the tank connection here.

[0080] The pilot stage 2 is fastened ...

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Abstract

The valve device has a main stage (1) with a main piston (18) and a pilot stage (2) with a pilot piston (4). A directional valve is arranged between electronic control unit and main stage. An opening stroke with short duration is produced by the pilot piston through the electric pulses (26,28) generated over the electronic control unit, so that an interval is formed between start position and end or stop position of the pilot piston in reversal state.

Description

technical field [0001] The invention relates to a valve system according to the preamble of claim 1 . Background technique [0002] Proportional directional valves are known from the prior art, the valve body of which, in addition to a closed position and an open position, can also assume an intermediate position in which the flow cross section is only partially opened. It is thus possible to control the flow rate in such a directional control valve. A disadvantage lies in the technical complexity of the device for such a directional valve. [0003] An adjustable valve is known from laid-open document DE 10 2010 045 504 A1, the valve body of which can assume a switch-on position and can also be moved pulse-like or impact-like, whereby the valve is briefly opened. This opening movement is repeated several times. With this so-called ballistic mode, it is also possible to achieve a reduced throughflow compared to full opening, whereby a directly actuated valve can be actuate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/043F15B21/08
CPCF16K31/06F15B19/002F15B2211/328F15B21/08F15B13/0402F15B13/043F15B2211/3111F16K11/0708
Inventor S.舍勒
Owner ROBERT BOSCH GMBH
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