DE102012210913A1 - Solenoid valve for controlling fluid, has valve insert fixedly accommodated in magnetic coil, where valve insert is constructed in multiple portions, and is provided valve sleeve and valve insert element enclosed in valve sleeve - Google Patents

Abstract

The solenoid valve (1) has a magnetic coil (2), an armature (3) movably supported in the magnetic coil and a control slide (7) for opening or closing two control ports (9a,9b) of a fluid. A valve insert (14) is fixedly accommodated in the magnetic coil, where the valve insert is constructed in multiple portions. The valve insert has a valve sleeve (5) and a valve insert element (11) that is enclosed in the valve sleeve. An immersion stage (17) is formed between a pole surface (15) of the valve insert element and an end surface (21) of the valve sleeve.

Description

State of the art

Normally closed solenoid valves for controlling a fluid are known in various configurations in the prior art and are used in particular in the control of automatic transmissions as pressure balanced slide valves. These solenoid valves have, in particular, an armature, a slide element and a control slide. The spool releases control ports or closes them depending on its positioning. In a de-energized state, a return member positions the spool valve in front of control ports and closes them so as to inhibit fluid flow. During current flow and generation of a magnetic field, the armature executes a lifting movement which is transmitted to the slide element and further moves the control slide counter to the direction of action of the return element, releases control passage openings and allows fluid flow. Such solenoid valves are for example from the DE 10 2007 001 187 A1 or the DE 10 2010 002 216 A1 known. It would be desirable to produce a cost-reduced transmission control valve, for example, by application of manufacturing technology of ABS solenoid valves on transmission control valves. In particular, the use of parts and / or techniques from the series of valves of the ABS / TCS / ESP / EHB generations would be desirable. Also desirable would be a reduced use of costly components with high accuracy, such as turned parts with high accuracies.

Disclosure of the invention

Accordingly, there is proposed a solenoid valve for controlling a fluid, comprising at least one solenoid, an armature movably mounted in the solenoid, and a spool for opening or closing at least two control passages of the fluid. The solenoid valve further comprises at least one slide element for stroke transmission of the armature to the spool.

Furthermore, the solenoid valve has a valve insert received in a stationary manner in the magnet coil. The valve insert of the solenoid valve is designed in several parts and has at least one valve sleeve and at least one of the valve sleeve enclosed valve insert element, wherein a dipping step is formed between a pole face of the valve insert element and an end face of the valve sleeve.

Under a spool in the context of the present invention, all types of elements, in particular pins, rods, sleeves, tubes, pipe sections, ring elements, etc. are understood to open and cover Steuerdurchlässen. Control passages in the sense of the present invention may be understood to mean all types of openings or through-openings, in particular channels, capillaries, lines, openings, etc., for the supply and / or removal of a fluid. For example, the control passages may include at least one supply control passage and / or at least one tank control passage.

Under a slider element according to the present invention, all types of elements, in particular pins, rods, sleeves, tubes, pipe sections, ring elements, etc. are understood to transmit a movement of the armature to the spool. Under a stroke transmission in the context of the present invention, all types of transmission of movements in particular stroke, thrust, gravity, train, etc. of the armature to the spool can be understood. In the context of the present invention, a valve insert can be understood to mean a basically arbitrary multi-part element which has at least one valve sleeve and at least one valve insert element enclosed by the valve sleeve, wherein the valve sleeve can be, for example, a bushing, an inner sleeve, a fitting ring or a similar element.

In principle, an end face in the sense of the present invention can be understood to mean any surface of the valve sleeve, preferably a flat surface. For example, the end face can be configured as an annular surface. The end face may in particular have a surface normal parallel to an axis of the solenoid valve and / or parallel to a stroke of the armature.

Under a dipping step in the sense of the present invention, in particular a distance between the pole face of the valve insert element and the end face of the valve sleeve can be understood. In the context of the present invention, a pole face may generally be understood to mean a surface on the armature and / or a surface of the valve insert element, for example a surface of the valve insert element facing the armature.

The valve sleeve can in particular be connected to the valve insert element by a connection selected from the group consisting of a non-positive and a positive connection. In particular, the compound may be selected from the group consisting of a press connection, a bracing, a Clamping connection, a shrinkage, a bond, a caulking, a locking mechanism.

By choosing a position of the connection, in particular a position of the valve insert element in the valve sleeve can be adjustable, so that a height of the immersion stage is adjustable. For the purposes of the present invention, a height of the immersion stage may be understood to be the distance between the pole face of the valve insert element and the end face of the valve sleeve. A working stroke in the sense of the present invention may be understood to be the distance between the pole face of the valve insert element and a surface of the armature, for example a surface of the armature facing the valve insert element and particularly preferably a pole face of the armature.

Due to the preferred adjustability of the height of the immersion stage, for example a adjustability in the context of a manufacturing process of the solenoid valve, in particular the possibility of a targeted influencing a characteristic of the magnetic force curve of the solenoid valve may exist. For example, the slope and / or the linearity of the magnetic force curve of the solenoid valve and thus the characteristic of a magnetic force curve can be influenced in a targeted manner by adjusting the height of the dipping stage.

According to a further preferred embodiment of the solenoid valve, the spool of the solenoid valve is movably mounted in a sliding sleeve. Under movable in the sense of the present invention, a storage can be understood, which allows a change in position of the spool relative to the slide sleeve, in particular by the transmission of a lifting movement, a pushing movement, a sliding movement, a sliding movement, etc. on the spool.

The sliding sleeve can in particular be connected to the valve sleeve of the valve core. The slide sleeve may be connected to the valve sleeve in particular by at least one compound selected from the group consisting of a non-positive and a positive connection. The compound may in particular be selected from the group consisting of a press connection, a bracing, a clamping connection, a shrinkage, a bond, a caulking, a latching mechanism.

According to a further preferred embodiment of the solenoid valve, at least one of the control passages, for example the at least one optional supply control passage and / or the at least one optional tank control passage, is formed in the slide sleeve.

The solenoid valve may further comprise at least one return element for returning the spool. A restoring element in the sense of the present invention can be understood in particular as: a spring element, an elastic element, a bendable element, an element on which a force can be exerted, whereby the dimension of the element changes and the element is neglected when the applied force is neglected moves back to its initial state or its initial dimension. This could in particular be a spring, a spiral, a spiral spring, an elastic rubber element, a plastic elastic element, a spring steel element, etc. The restoring element can in particular be designed to be adjustable for controlling a restoring force. A control of a restoring force in the sense of the present invention can be understood to mean, in particular, a targeted influencing of a force component with which the restoring element returns to its initial position, its initial dimensioning. In particular, an adjustable restoring element cover for controlling the restoring force can be arranged on the restoring element. In the context of the present invention, a restoring element cover may in particular be understood to mean a capsule, a cover, etc. or another element which influences the restoring force of the restoring element.

According to a further preferred embodiment of the solenoid valve, the solenoid valve further comprises at least one capsule element, wherein the armature is movably mounted in the capsule element and wherein the capsule element magnetically insulates the armature against the valve core. In the context of the present invention, a capsule element can be understood in particular to be a casing, an encapsulation, an encapsulation, etc. The capsule element may in particular be made of a non-magnetic material, in particular a non-magnetic material selected from the group consisting of aluminum compounds, brass compounds, copper compounds, non-magnetic stainless steels, in particular X4CrNi18-12 steels, in particular DIN EN 10088-2 (2005-09) . DIN EN 10088-3 (2005-09) , Combinations thereof and the like.

According to a further preferred embodiment, the solenoid valve further comprises at least one sealing element for separating fluids. In the context of the present invention, a sealing element can be understood in particular to be a seal, a sealing ring, a packing, an O-ring, a lip, a rubber lip, etc. Under a separation of fluids in the sense of The present invention may, in particular, be understood to mean prevention of mixing, coming into contact, exchange of fluids and / or fluid flow.

According to a further preferred embodiment of the solenoid valve, the slider element is displaceably mounted within the valve sleeve. Under slidable in the sense of the present invention, in particular a force transmission of the armature on the slide element, which changes its initial position, moves, shifts, be understood with respect to the valve sleeve.

According to a further preferred embodiment of the solenoid valve, the valve sleeve surrounds the slide element radially. The slider element can protrude in particular on the pole face of the valve sleeve and enter the immersion stage. With a movement, for example a stroke, of the armature and a transmission of motion to the slide element, the slide element can move out of the immersion stage and can preferably no longer protrude into the immersion step at maximum displacement.

According to a further preferred embodiment of the solenoid valve, the valve insert is configured at least in two parts. Preferably, by using design features of ABS valves with their manufacturing techniques, a reduced cost spool valve can be made. The magnetic immersion stage can preferably be constructed from cold-impact and / or deep-drawing contours with a simple outer contour. By a displacement of valve components, in particular the valve sleeve, the valve core element, the capsule element or the sliding sleeve, before the manufacturing / manufacturing step of the compound, in particular the compression, clamping, caulking, bracing, shrinking, gluing or locking, can a high accuracy of fit of the elements be achieved despite cost-effective prefabrication.

Preferably, the solenoid valve can be made of simple, inexpensive parts with reduced tolerances, the reduced tolerances of the individual elements are compensated by adjustability, displaceability before the connection process of the individual components. Preferably can be adjusted by an adjustability of the height of the immersion stage, the characteristic of the magnetic force curve of the solenoid valve, in particular the height and / or the linearity and / or the slope of the magnetic force curve can be influenced.

Advantages of the invention

Both the connection between the valve sleeve and slide sleeve and between valve insert element, capsule element and valve sleeve takes place in the manufacturing process of the solenoid valve, in particular by the aforementioned types of connection, such as a press connection. Thus, the desired distances between individual components can be adjusted / adjusted during production and can be dispensed with costly components with high manufacturing accuracy, such as turned parts with high accuracy, if necessary. Advantageous is the cost-effective and time-saving production of the solenoid valves according to the invention.

Another advantage is independent of the magnetic circuit adjustment, in particular the slide sleeve to the valve sleeve during the manufacturing process. The immersion stage is preferably designed in particular as a geometrically adjustable immersion stage between a pole face of a side of an armature facing a valve insert element and a pole face of the valve insert element facing the armature.

Preferably, the armature is arranged in a non-magnetic, thin-walled capsule element in order to generate the smallest possible magnetic air gaps and to prevent a magnetic short circuit between the armature and the valve sleeve, in particular the immersion stage is magnetically separated from the valve sleeve by the capsule element. The adjustment options and / or the characteristics of the magnetic force curves are advantageous in the setting / adjustment of distances and the adjustability of a dip level given herewith. In particular, influence on the curve and height, slope and linearity can be taken.

Another advantage of the present invention is that with the selected types of connection no additional fasteners are required and components and material can be saved. Thus, the solenoid valve and / or the immersion can be made of simple, inexpensive elements with reduced tolerances on individual components and partial use of elements from existing series, such as ABS / TCS / ESP / EHB generations and thereby material and manufacturing costs can be advantageously saved.

It is also advantageous that the solenoid valve according to the invention can be mounted in particular in a hydraulic block by means of a fluid pressure-tight press-fit or caulking process and that additional fastening and / or sealing elements can also be saved in these types of connection. A further advantage is that a Solenoid of the solenoid valve according to the invention can be connected in particular by means of a press connection with the valve sleeve. It is also advantageous that a restoring force of a restoring element with the positioning of a restoring element cover, in particular a pressed capsule is adjustable.

Brief description of the drawings

The invention is explained below with reference to a preferred embodiment, wherein it should be noted that by this example modifications or additions, as they are obvious to those skilled, are included.

Show it:

1 a schematic cross section through an embodiment of a solenoid valve;

2 a schematic cross section of a detailed representation of the central region of the solenoid valve and its immersion stage; and

3 a schematic cross section of a detailed representation of the lower portion of the solenoid valve with sliding sleeve and control passages in the sliding sleeve.

The embodiment according to 1 shows a solenoid valve 1 with a magnetic coil 2 within which an anchor 3 is arranged. The magnetic coil 2 corresponds for example to an element of an ABS series. The anchor 3 is especially in a non-magnetic, thin-walled capsule element 4 guided to generate the lowest possible magnetic air gaps and a magnetic short between armature 3 and a valve sleeve 5 to prevent.

In contact with the anchor 3 is a slider element 6 arranged. On a the anchor 3 opposite side of the slide element 6 is on the slider element 6 a spool 7 arranged. At one of the slider element 6 opposite side of the spool 7 is a reset element 8th , which exerts a restoring force, in contact with the spool 7 arranged.

In the generation of a magnetic field by means of the magnetic coil 2 leads the anchor 3 a lifting movement in the direction of the return element 8th by. The lifting movement is from the anchor 3 on the slide element 6 and continue on the spool 7 transfer. With the control slide 7 may in this embodiment control passages in the form of, for example, two supply control passages 9a , two tank control ports 9b be opened or closed separately and thus for example with a coupling passage 10 be fluidly connected or fluidly separated from this.

Furthermore, around the slider element 6 a valve core element 11 arranged radially. The valve insert element 11 has a connection to the capsule element 4 and the valve sleeve 5 on. Inside the valve core element 11 is the slider element 6 freely movable and can be a lifting movement of the armature 3 over the slider element 6 to the spool 7 transfer.

The spool 7 is arranged within a sliding sleeve 12 , The sliding sleeve 12 is located inside the valve sleeve 5 and connected to it. The supply control passages 9a and the tank control ports 9b are in the sliding sleeve 12 trained and can by the positioning of the spool 7 hidden and thus closed and / or not covered and thus opened. Depending on the position of the spool 7 can through the supply control passages 9a and / or the tank control passages 9b a fluid flow and / or also blocked and a fluid flow can be controlled, depending on the fluidic connection with the clutch passage 10 or separation from the coupling passage 10 , A separation of different fluid flows / control circuits is carried out by at least one sealing element 20 ,

At the the spool 7 opposite side of the return element 8th is a reset element cover 13 arranged. With the return element cover 13 can by different positioning of the reset element cover 13 the restoring force of the return element 8th adjusted, regulated and / or controlled.

Out of the valve sleeve 5 enclosed valve insert element 11 and the valve sleeve 5 becomes a valve core 14 educated. At the anchor 3 facing side of the valve core element 11 is a pole surface 15 educated. A working stroke 22 is by a distance between one of the pole face 15 of the valve core element 11 facing surface 16 of the anchor 3 and the pole surface 15 of the valve core element 11 Are defined. Between the pole surface 15 of the valve core element 11 and a face 21 the valve sleeve 5 is a diving level 17 educated. The height of the diving level 17 is determined by a distance between the pole face 15 , the valve insert element 11 and the face 21 the valve sleeve 5 , With the setting of the height of the diving level 17 can specifically influence a magnetic force curve of the solenoid valve 1 be taken. For example, a slope and / or a linearity of the magnetic force curve of the solenoid valve 1 by adjusting the height of the diving level 17 be set. In an end position of the anchor 3 can the area 16 of the anchor 3 in contact with the pole surface 15 of the valve core element 11 stand, with the anchor 3 until the stop in the dipping stage 17 retracted and the slide element 6 not in the diving level anymore 17 protrudes into it. With opening of the supply control passage 9a is a clutch on the clutch passage 10 supplied with pressure. Is the utility tax passage 9a closed, pressure is released from the clutch from the clutch passage 10 via the tank control passage 9b dismantled to a tank again.

2 shows a detailed view of a central region of the solenoid valve 1 according to 1 , In this illustration is a connection 18 the valve sleeve 5 and the valve core element 11 recognizable. In this connection 18 can at least partially the capsule element 4 be embedded. The slider element 6 is freely movable within the valve core element 11 arranged. The slider element 6 can be a lifting movement of the anchor 3 on the spool 7 transfer. Between the surface 16 of the anchor 3 and the pole surface 15 of the valve core element 11 is the working stroke 22 educated. Between the pole surface 15 of the valve core element 11 and the face 21 the valve sleeve 5 is the diving level 17 educated. The height of the diving level 17 is, as stated above, preferably adjustable and depending on the position of the pole face 15 and the face 21 the valve sleeve 5 , In an end position of the anchor 3 is the anchor 3 maximum in the diving level 17 retracted and the slide element 6 from the diving level 17 repressed.

The sliding sleeve 12 is inside the valve sleeve 5 arranged and with this over a connection 19 connected. The spool 7 is inside the sliding sleeve 12 movably arranged.

3 shows a detailed view of a lower portion of the solenoid valve 1 according to 1 , Inside the valve sleeve 5 is the sliding sleeve 12 with the supply control passages 9a and tank control passages 9b arranged. The spool 7 is in the sliding sleeve 12 movably arranged and conceals the supply control passages in a first position 9a the sliding sleeve 12 and in a second position, the tank control passages 9b , In this illustration is a connection 19 the valve sleeve 5 with the sliding sleeve 12 recognizable.

In a de-energized state of the solenoid valve 1 is by a restoring force of the return element 8th the spool 7 moved to the first position, the supply control passages 9a concealed and the tank control passages 9b Approved. In the first position of the spool 7 becomes a utility tax passage 9a supplied first fluid flow blocked. One from the clutch passage 10 Back flowing pressure from the clutch can be via the tank control ports 9b flow back into the tank. Both fluid flows are through a sealing element 20 separated from each other.

When an applied magnetic field, the spool moves 7 against the restoring force of the return element 8th and is located in the second position. In the second position of the spool valve 7 can be one of the shared supply control passages 9a supplied first fluid flow pass and via coupling passage 10 get to the clutch. At the same time are the tank control ports 9b blocked to the tank.

The change between the currentless state and the state in the presence of a magnetic field and the change between the first and the second position regulates a flow through and / or blocking of the fluid streams. Under a change between blocking and / or releasing at least one of the supply control passages 9a , Tank control passages 9b and the clutch passage 10 For the purposes of the present invention, a control or switching operation is understood. An inverse control has an array of differently arranged supply control passages 9a , Tanksteuerdurchlässen 9b and one or more coupling passages 10 and different design of the spool 7 on.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007001187 A1 [0001]
• DE 102010002216 A1 [0001]

Cited non-patent literature

• DIN EN 10088-2 (2005-09) [0015]
• DIN EN 10088-3 (2005-09) [0015]

Claims (10)

Magnetic valve ( 1 ) for controlling a fluid, with at least one magnetic coil ( 2 ), one in the magnetic coil ( 2 ) movably mounted anchors ( 3 ), a spool ( 7 ) for opening or closing at least two control passages ( 9a . 9b ) of the fluid, the solenoid valve ( 1 ) at least one slide element ( 6 ) for the stroke transmission of the armature ( 3 ) to the spool ( 7 ), wherein the solenoid valve ( 1 ) continue in the magnetic coil ( 2 ) fixedly received valve insert ( 14 ), characterized in that the valve core ( 14 ) is formed in several parts and at least one valve sleeve ( 5 ) and at least one of the valve sleeve ( 5 ) enclosed valve insert element ( 11 ), wherein a dipping step ( 17 ) between a pole surface ( 15 ) of the valve insert element ( 11 ) and an end face ( 21 ) of the valve sleeve ( 5 ) is trained. Magnetic valve ( 1 ) according to the preceding claim, wherein the valve sleeve ( 5 ) with the valve insert element ( 11 ) through a connection ( 18 ), selected from the group consisting of a non-positive and a positive connection. Magnetic valve ( 1 ) according to the preceding claim, wherein the compound ( 18 ) is selected from the group consisting of a press connection, a bracing, a clamp connection, a shrinkage, a bond, a caulking, a latching mechanism. Magnetic valve ( 1 ) according to one of the two preceding claims, wherein by selecting a layer of the compound ( 18 ) a position of the valve core element ( 11 ) in the valve sleeve ( 5 ) is adjustable, so that a height of the dipping step ( 17 ) is adjustable. Magnetic valve ( 1 ) according to one of the preceding claims, wherein the spool ( 7 ) is movably mounted in a sliding sleeve ( 12 ). Magnetic valve ( 1 ) according to the preceding claim, wherein the sliding sleeve ( 12 ) with the valve sleeve ( 5 ) of the valve core ( 14 ) connected is. Magnetic valve ( 1 ) according to the preceding claim, wherein the sliding sleeve ( 12 ) with the valve sleeve ( 5 ) is connected by at least one compound ( 19 ) selected from the group consisting of a positive and a positive connection. Magnetic valve ( 1 ) according to the preceding claim, wherein the compound ( 19 ) is selected from the group consisting of a press connection, a bracing, a clamp connection, a shrinkage, a bond, a caulking, a latching mechanism. Magnetic valve ( 1 ) according to one of the four preceding claims, wherein at least one of the control passages ( 9a . 9b ) in the sliding sleeve ( 12 ) is trained. Magnetic valve ( 1 ) according to one of the preceding claims, wherein the solenoid valve ( 1 ) at least one reset element ( 8th ) for resetting the spool ( 7 ) having.

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