Electromagnetic hydraulic valve, in particular proportional valve for controlling a device for adjusting the rotational angle of a camshaft in an internal combustion engine, and method for the product
A technology of rotation angle and hydraulic valve, which is applied in the direction of valve device, mechanical equipment, transportation and packaging, etc., to achieve reliable guidance and reduce hydraulic resistance
Inactive Publication Date: 2005-07-27
SCHAEFFLER TECH AG & CO KG
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Problems solved by technology
The disadvantage in this case, however, is that the piston valve has a considerable overall length due to the additional guide journal, and therefore requires a correspondingly long valve body and a correspondingly deep insertion hole for the valve.
Since the radial opening in the valve body is unilaterally oriented both for the user connection and for the pressure connection and the tank connection, this proportional valve also requires precise installation orientation and can therefore only be used with correspondingly arranged connecting lines
Method used
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Embodiment Construction
[0017] from figure 1 It can be clearly seen that the electromagnetic hydraulic valve 1 is mainly composed of a hollow cylindrical electromagnet 2 with an axially moving armature 3 therein, a cylindrical valve body 4 with an axial hole 5 and a piston valve arranged in the hole. 6 composition. In this respect, the piston valve 6 formed as a hollow piston is force-transmittingly connected to the armature 3 of the electromagnet 2 via a push rod not shown in detail, and as figure 1 As shown in the illustration separated along the longitudinal centerline, the force of the reversible pressure spring 7 moves axially in the through axial hole 5 of the valve body 4 .
[0018] Also in figure 1It can be seen in the figure that the valve body 4 has three annular grooves 8, 9, 10 axially spaced from each other on its circumference, and a plurality of grooves are respectively machined and evenly distributed on the circumference and set into the axial hole 5 of the valve body 4. The radial...
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The invention relates to an electromagnetic hydraulic valve (1), which consists essentially of an electromagnet (2) with an armature (3) and a valve housing (4) comprising an axial bore (5) and a piston valve (6). The valve housing (4) has several annular grooves (8, 9, 10), in which are configured several respective radial openings (11, 12, 13), which open into the axial bore (5), said radial openings connecting the hydraulic valve (1) in a fluidic manner to a pressure connection (P), a tank connection (T) and two consumer connections (A, B). The piston valve (6), which is connected to the armature (3) of the electromagnet (2) in a force-transmitting manner, comprises two annular control sections (14, 15), which alternatively connect the pressure connection (P) and the tank connection (T) to one of the consumer connections (A, B) by the axial displacement of the piston valve (6). According to the invention, the radial openings (11, 12, 13) in the valve housing (4) are configured as windows with a quadrangular cross-section, whose cross-sectional area that is released by the control sections (14, 15) of the piston valve (6) is a ring segment that can be modified in such a way that the flow through the radial openings (11, 12, 13) is linear in relation to the respective position of the armature (3) of the electromagnet (2) in all positions of the piston valve (6).
Description
technical field [0001] The invention relates to a solenoid valve according to the preamble of claim 1 and a method for its production. The invention is particularly advantageously implemented in a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to the crankshaft of an internal combustion engine. Background technique [0002] DE 198 53 670 A1 discloses a proportional valve of classified construction for controlling a device for adjusting the angle of rotation of a camshaft relative to the crankshaft of an internal combustion engine, consisting essentially of a hollow cylindrical electromagnet with an axially movable armature inside and a It consists of a cylindrical valve body with an axial hole and a piston valve arranged in the hole. In this respect, the piston valve, which is formed as a hollow piston, is effectively connected to the armature of the electromagnet via a push rod in such a way that the magnetic force of ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01L1/344
CPCF01L1/344Y10T29/49247Y10T29/49405Y10T29/49412Y10T29/49416Y10T29/49417Y10T29/49419Y10T29/49988Y10T29/49989Y10T137/86622Y10T137/8671Y10T137/86767
Inventor 克劳斯·达乌特艾德沃德·戈洛瓦泰-施米特
Owner SCHAEFFLER TECH AG & CO KG