DE19932747B4 - Method for producing a pressure regulating valve for an automatic transmission of a motor vehicle and pressure regulating valve produced by the method - Google Patents

Abstract

Method for producing a pressure regulating valve (10, 10a, 10b, 10c) for an automatic transmission of a motor vehicle, in which in each case a magnetic part (11, 80) having a current-carrying coil (20, 84) and a magnet armature (26, 26a; a valve port member (40; 40a; 61; 61a) having a valve spool (55; 55a; 70; 70a) and ports (T, P, A) are interconnected so that the armature (26; 26a; 85) is operatively connected to the valve spool (55; 55a; 70; 70a) and due to the arrangement and design of magnet armature (26; 26a; 85), valve spool (55; 55a; 70; 70a) and connections (T, P, A) with an increasing Energizing the coil (20; 84) at the load (A) increasing or decreasing pressure can be generated, characterized in that a first magnetic part (11), wherein the armature is pulled in current flow through the coil in the direction of the magnetic part, and a second magnetic part (80), wherein the magnet armature when current flows through the coil from the magnet part ...

Description

State of the art

The The invention relates to a method for producing a pressure regulating valve for a Automatic transmission of a motor vehicle according to the preamble of Claim 1 and produced by the method pressure control valves. In the production of such pressure control valves is so far the controlling the pressure medium flow Valve connection element including valve spool due to the set parameters such as flow rate, Connection location and dimensions etc. designed for what the constructively defined valve connection element developed a magnetic part is, for example, in relation to a rising or falling Characteristic of the pressure control valve is adjusted. This is done by the arrangement of the armature to the coil, so that when energized the Coil either a "pulling" or a "pushing" magnet Use finds. But also the other constructive details like Anchor filling, Shape of anchor and magnetic core, etc. are the particular application customized. Due to the design and production of such pressure control valves costs is such Procedure extremely uneconomical. This results from the fact that two different elements (valve connection element and magnetic part) developed be, with the magnetic part in turn to the valve connection element is adjusted. It should be noted that the manufacturing costs of the magnetic part usually higher are as the valve terminal element.

From the DE 43 42 591 A1 an electromagnetically actuable pressure regulating valve is known which has a magnetic part which uses a magnet attracted to the coil when energized, and a valve disposed on the magnetic valve member. The pressure control valve has a falling control pressure-current characteristic.

Of the Invention is the object of the reason, the cost reduce in the manufacture of a pressure control valve. These The object is achieved by the process according to the invention for the production a pressure regulating valve having the features of the independent claim 1 solved.

Advantages of the invention

The inventive method for producing a pressure regulating valve for an automatic transmission of a Motor vehicle with the features of claim 1 has compared to The prior art has the advantage that the pressure regulating valve relative is inexpensive to produce. This is achieved by now in the manner of a modular system of a few standardized, in their construction always the same and therefore relatively high due to the higher number of pieces low production costs produced magnet parts which is specially adapted to the particular application Valve connection element be combined. Is it for a particular part of the magnet? decided with a particular anchor arrangement, so is a rising or falling characteristic over the formation of the valve connection element and the valve spool reached. Since these parts, however, always to the respective Use case must be adjusted, this is no or only a relatively small extra effort.

Further Advantages and advantageous developments of the method according to the invention for producing a pressure regulating valve for an automatic transmission of a Motor vehicle and pressure regulating valves produced by the method emerge from the dependent claims and the description.

drawing

embodiments The invention are illustrated in the drawing and are explained in more detail below. It demonstrate:

1 and 2 Solenoid valves with different valve connection elements and in each case a first identically designed magnetic part in longitudinal section and

3 and 4 Solenoid valves with different valve connection elements and in each case a second identically designed magnetic part in longitudinal section.

Description of the embodiments

That in the 1 illustrated first pressure control valve 10 serves to control a pressure medium flow in an automatic transmission of a motor vehicle between a pressure medium tank T, a pressure medium source P and a consumer A. The pressure control valve 10 has one with 11 designated magnetic part with a magnet housing 12 on. The thermoformed magnet housing 12 has at one end a longitudinal U-shaped retracted bottom 13 and at the opposite end a circumferential bead 14 , In the area of the Bördelrandes 14 is on the inner wall of the magnet housing 12 a cylindrical recess 16 with a circumferential shoulder 17 educated. Furthermore, in the interior of the magnet housing 12 a magnetic coil 20 arranged, which is a substantially sleeve-shaped magnetic core 22 encloses. In the magnetic core 22 is an adjusting screw 23 for adjusting the characteristic of the pressure regulating valve 10 used. In the adjusting screw 23 is a plain bearing 24 arranged in which a pestle 25 is guided in a sliding manner. The pestle 25 is with an anchor 26 firmly connected, against the underside 27 a coil spring 28 supported on one end of the slide bearing 24 rests. In the magnetic core 22 is also on the adjusting screw 23 opposite side a cylindrical recess 29 formed into which an extension 30 of the anchor 26 dips. On the top 31 of the anchor 26 is a paragraph 32 formed with a diaphragm spring 33 connected, the plan on the shoulder 17 rests and the up to Bördelrand 14 of the magnet housing 12 zoom extends.

In the pre-assembled with the mounting parts just described pressure control valve 10 will be in the area of the soil 13 of the magnet housing 12 Injected plastic, the spaces in the interior between the magnet housing 12 , the magnetic coil 20 and the magnetic core 22 fills, which in particular during operation of the pressure control valve 10 a good heat dissipation is achieved. At the same time a plug connection 35 at the bottom of the magnet housing 12 molded, in the connecting lugs 36 for the solenoid 20 are arranged.

In the depression 16 of the magnet housing 12 is a first valve connection element 40 used radial play free, the ring-shaped underside 41 on the diaphragm spring 33 rests. The first valve connection element 40 is with the magnet part 11 or the magnet housing 12 firmly connected by the crimping edge 14 of the magnet housing 12 against those in the area of the depression 16 arranged lateral surface 42 of the first valve connection element 40 is flanged.

In the first valve connection element 40 Centric is a hole 43 with two bore sections 45 . 46 formed of different diameters. The part of the magnet 11 facing first bore section 45 has a smaller inner diameter than that of the magnetic part 11 remote second bore section 46 , Perpendicular to the hole 43 are four pocket-shaped recesses 47 to 50 formed the bore 43 penetrate, and which are connected to the terminals T, P and A. The one connected to the terminal T recess is used 47 to prevent that on the connected to the pressure medium source P recess 48 Pressure to the anchor room 51 of the magnetic part 11 builds.

While the recesses 47 to 49 in the first hole section 45 are arranged, which is connected to the pressure medium tank T recess 50 in the area of the second bore section 46 , The magnetic part 11 opposite end face of the bore 43 is from a lock washer 52 closed, in the middle of a blind bore 53 is formed with a diameter greater than 0.6 mm, which is relieved to the pressure medium tank T out.

In the hole 43 is a valve spool 55 slidably arranged. The valve spool 55 is stepped with three cylindrical sections 56 . 57 . 58 educated. In this case, the middle section 57 the smallest diameter and the lock washer 52 facing section 58 the largest diameter. Between the section 58 and the lock washer 52 there is a damping volume formed by the pressure medium to provide the dynamics and stability of the pressure control valve 10 set.

In the illustrated de-energized position of the pressure control valve 10 closes the section 56 the recesses connected to the pressure medium tank T and the pressure medium source P. 47 . 48 sealing, while the section 58 also connected to the pressure medium tank T recess 50 only partially closes and connected to the consumer A recess 49 over the middle section 57 the valve slide 55 to the recess 50 is relieved.

In the magnet part 11 remote end face of the valve spool 55 is in the middle a blind hole 59 formed in which a spring 60 is arranged, which is against the support disk 52 supported, wherein the coil spring 28 slightly more biased than the spring 60 ,

The pressure control valve 10 operates as follows: In the illustrated de-energized position of the pressure control valve 10 is the position of the valve spool 55 from the resulting spring force of the coil spring 28 and the spring 60 dependent. This pushes the valve spool 55 in the direction of the lock washer 52 , so that the recess connected to the pressure medium source P 48 from the section 56 of the valve spool 55 is closed. At the same time coupled to the consumer A recess 49 to the recess 50 of the pressure medium tank T through. Will now be the solenoid 20 energized, it becomes the anchor 26 in the direction of the depression 29 of the magnetic core 22 drawn. As a result, the section begins 56 the recess connected to the pressure medium source P. 48 open while at the same time connected to the pressure medium tank T recess 50 is closed. The stagnant from the pressure medium source P pressure medium passes through the recess 49 to the consumer A. In the described pressure control valve 10 So it is a pressure control valve with increasing characteristic.

About the choice of the length of the piston section 55 Any desired negative or positive overlap can be set. About that In addition, the piston sections 56 and 58 or the recesses 48 and 50 be designed so that any forms of fine control of the pressure medium flow are possible.

That in the 2 illustrated second pressure control valve 10a differs from the above-described pressure control valve 10 only by its valve connection element 61 , The entire magnet part 11 is however identical to the first pressure control valve 10 built up. By means of the valve connection element 61 can in contrast to the valve connection element 40 a falling characteristic is generated.

This is in the valve connection element 61 a through hole 62 formed by three pocket-shaped recesses 63 . 64 . 65 is penetrated at right angles. The magnetic part 11 facing recess 63 is with the pressure medium tank T, the middle recess 64 with the consumer A and the recess 65 connected to the pressure medium source P. The magnetic part 11 opposite end face of the valve connection element 61 is from a lock washer 67 locked. In the lock washer 67 is off-center a blind bore 68 formed, which is relieved to the pressure medium tank T out. In the hole 62 is a bone-shaped valve slide 70 led, which has a middle section 71 smaller outer diameter and two outer sections 72 . 73 having the same diameter. In the lock washer 67 facing end face of the valve spool 70 is a blind hole 74 formed in the middle section 71 from a transverse bore 75 is interspersed. With the lock washer 67 is a short guide pin 76 Loosely connected, in the blind hole 74 protrudes.

In the illustrated de-energized position of the pressure control valve 10a are the recess connected to the pressure medium tank T. 63 from the section 72 and connected to the pressure medium tank T aperture bore 68 from the section 74 of the valve spool 70 locked. However, a pressure medium flow takes place over the middle section 71 of the valve spool 70 from the pressure medium source P to the consumer A out instead. Will now the pressure control valve 10a energized, then the valve spool 70 together with the anchor 26a in the direction of the magnetic part 11 drawn. As a result, the section begins 72 of the valve spool 70 the recess connected to the pressure medium tank T. 63 to open while at the same time the section 73 the recess connected to the pressure medium source P. 65 begins to close. Thus, a pressure medium flow from the consumer A through the middle section 71 of the valve spool 70 for connected to the pressure medium tank T recess 63 occur. The pressure control valve 10a thus has a falling characteristic.

From the above-described two first embodiments, it can be seen that with one and the same magnetic part 11 Pressure control valves with increasing or decreasing characteristic can be produced. In the examples described, a so-called pulling magnet is used for this purpose because, when the magnet coil is energized, the latter is the valve slide 55 in the direction of the magnetic part 11 draws. The magnetic part 11 is optimized with regard to the desired applications in terms of its structural and electrical structure and therefore feasible at relatively high cost at relatively low cost. The adaptation to the particular application, for example, whether an increasing or decreasing characteristic curve is required, which pressures and flow rates are to be controlled, which damping the pressure control valve is to experience, etc. is exclusively the structural design of the valve connection element 40 . 61 and in particular by the design and arrangement of the terminals and the valve spool 55 . 70 as well as the diameter of the aperture hole 53 . 68 the lock washer 52 . 67 certainly.

In the following two further embodiments will be described with a so-called pushing magnet. The term comes from the fact that the magnetic circuits push the valve slide when energizing the solenoid coil from the magnetic part. These pressing magnets are combined with valve connecting elements, which are characterized by minor modifications of the valve connecting elements 40 and 61 arise.

In the in the 3 illustrated third pressure control valve 10b this has a magnetic part 80 on. The magnetic part 80 has a tubular magnet housing 81 in which a magnetic core 82 is inserted, which is almost flush with one end of the magnet housing 81 concludes. The magnetic core 82 has an area 83 with reduced outside diameter, around the one solenoid 84 is arranged. The height of the solenoid 84 is such that these over the magnetic core 82 protrudes. In the over the magnetic core 82 outstanding section of the solenoid 84 An anchor emerges 85 partially a. The anchor 85 consists essentially of two sections 86 . 87 different outer diameter, with one section 86 partly in the magnetic coil 84 protrudes, and the other section 87 the one end face 88 the solenoid 84 covered. At his the magnetic core 82 facing end points the anchor 85 a small section 89 smaller extent, in a corresponding recess 90 of the magnetic core 82 can dive.

For axial guidance of the anchor 85 serves on the one hand on the magnetic core 82 opposite side of the anchor 85 a diaphragm spring 92 with the top of the anchor 85 connected is. The diaphragm spring 92 lies with its circumference on a paragraph 93 of the magnet housing 81 on, by reducing the inner diameter of the magnet housing 81 arises. The flared edge thus formed 94 is against a cover 95 flanged, in turn, on the diaphragm spring 92 in the area of the paragraph 93 rests. The axial guidance of the anchor 85 is completed by a pestle 97 , The pestle 97 is with its one end in an axial through hole 98 of the anchor 85 pressed. The one from the anchor 85 outstanding section of the plunger 97 is in a plain bearing 99 led, in a through hole 101 of the magnetic core 82 is arranged. The length of the plunger 97 is such that it is the magnetic core 82 completely penetrates, and on the valve spool 70a a valve connection element 61a can act.

The valve connection element 61a is analogous to the previously described valve connection elements 40 and 61 with the one end side of the magnet housing 81 by crimping a crimping edge 102 firmly connected. The only difference of the valve connection element 61a to the valve connection element 61 is that in the blind hole 74 of the valve spool 70a a compression spring 103 is arranged, which is against the free end face of the guide pin 76 supported. The compression spring 103 serves to the valve slide 70 always in contact with the plunger 97 to hold so that the plunger 97 or the anchor 85 and the valve spool 70a coupled together. Further, the sections have 71a . 72a . 73a of the valve spool 70a opposite the sections 71 . 72 . 73 of the valve spool 70 changed lengths.

In the illustrated de-energized position of the pressure control valve 10b closes the section 73a the recess connected to the pressure medium source P. 65 , Furthermore, the section closes 72a the recess connected to the pressure medium tank T. 63 only partially so that over the middle section 71a the recess 64 of the consumer A to the recess 63 of the pressure medium tank T is relieved.

Will now be the solenoid 84 of the pressure control valve 10b energized, it becomes the anchor 85 in the direction of the magnetic core 82 pulled, and the pestle 97 pushes the valve slide 70a against the spring force of the compression spring 103 in the direction of the lock washer 67 , As a result, the recess connected to the pressure medium container T is 63 closed, while previously connected to the pressure medium source P recess 65 from the section 73a is released so that over the middle section 71a a pressure medium flow to the recess 64 of the consumer A can take place. The pressure at the consumer A is greater, the stronger the energization of the solenoid 84 is. The pressure control valve 10b thus has an increasing characteristic.

That in the 4 illustrated fourth embodiment shows the pressure control valve 10c , The pressure control valve 10c is created by a combination of the magnetic part 80 the third pressure control valve 10b with a modified valve connecting element 40a of the first pressure control valve 10 , The modification is that the length of the sections 56a . 57a and 58a of the slider 55a opposite the lengths of the sections 56 . 57 and 58 of the slider 55 at the valve connection element 40 are changed. In the illustrated de-energized position of the pressure control valve 10c are the recesses connected to the pressure medium tank T. 47 and 50 from the sections 56a and 58a completely closed. At the same time, however, a pressure fluid flow from the connected to the pressure medium source P recess 48 over the middle section 57a to the recess 49 of the consumer A out.

Will now the pressure control valve 10c energized, pushes the plunger 97 the slider 55a in the direction of the lock washer 52 , This has the consequence that the section 56a the recess connected to the pressure medium source P. 48 gradually closes while the recess connected to the pressure medium tank T. 50 from the section 58a gradually released. As a result, the pressure fluid flow from the pressure medium source P to the consumer A gradually decreases. The pressure control valve 10c has a falling characteristic.

From the embodiments described above it can be seen that with one and the same magnetic part 11 respectively. 80 , Which in each case optimized in terms of a certain range of applications and thus can be produced in relatively high numbers at low cost, various applications through different valve connection elements 40 . 40a . 61 . 61a can be covered. It is thus a modular system that can combine different magnetic parts with different valve connection elements, starting from standardized or optimized magnetic parts, which are combined with the specially adapted valve connection element.

insofar are the described magnetic parts and valve connection elements Of course only to be considered as an example. Furthermore, it should be clear that such a Modular system is only feasible, if with respect to the connection of magnetic part and valve connection elements always the same geometric relationships d. H. Connection dimensions available are.

Claims (5)

Method for producing a pressure regulating valve ( 10 ; 10a ; 10b ; 10c ) for an automatic transmission of a motor vehicle, in which in each case a current-carrying coil ( 20 ; 84 ) and a magnet armature ( 26 ; 26a ; 85 ) having magnetic part ( 11 ; 80 ) as well as a valve spool ( 55 ; 55a ; 70 ; 70a ) and connections (T, P, A) having valve connection element ( 40 ; 40a ; 61 ; 61a ) are connected together so that the armature ( 26 ; 26a ; 85 ) in operative connection with the valve slide ( 55 ; 55a ; 70 ; 70a ) and due to the arrangement and design of armature ( 26 ; 26a ; 85 ), Valve spool ( 55 ; 55a ; 70 ; 70a ) and connections (T, P, A) with an increasing energization of the coil ( 20 ; 84 ) at the consumer (A) increasing or decreasing pressure can be generated, characterized in that a first magnetic part ( 11 ), in which the magnet armature is pulled in the direction of the magnetic part when current flows through the coil, and a second magnet part ( 80 ), in which the magnet armature is pushed away from the magnet part during current flow through the coil, and that four different valve connection elements ( 40 ; 40a ; 61 ; 61a ), of which in each case two can be combined with one of the two magnetic parts via the same geometric connection dimensions, wherein, irrespective of the selection of the magnetic part ( 11 . 80 ) in order to achieve an increasing or decreasing pressure at the consumer (A), the selected magnet part is combined with one of the two associated valve connection elements such that the arrangement of the connections (T, P, A) in the valve connection element ( 40 ; 40a ; 61 ; 61a ) and the design of the valve spool ( 55 ; 55a ; 70 ; 70a ) the desired course of the pressure at the consumer (A), rising or falling, with increasing energization of the coil ( 20 ; 84 ) is achieved. Method according to claim 1, characterized in that the valve slide ( 55 ; 55a ; 70 ; 70a ) Sections ( 56 . 57 . 58 ; 56a . 57a . 58a ; 71 . 72 . 73 ; 71a . 72a . 73a ) having different diameters, wherein the length of which is adapted to influence the course of the pressure medium flow to the terminals (T, P, A). Pressure regulating valve, produced by a method according to claim 1 or 2, wherein the valve spool ( 55 ; 55a ; 70 ) with a spring ( 60 ; 103 ) is in operative connection to this in contact with the armature ( 26 ; 26a ; 85 ) and the spring ( 60 ; 103 ) in a blind hole ( 59 ; 74 ) of the valve spool ( 55 ; 55a ; 70 ) is arranged. Pressure control valve according to claim 3, wherein the magnetic part ( 11 ; 80 ) and the valve connection element ( 40 ; 40a ; 61 ; 61a ) are interconnected by means of a crimp connection, and wherein the magnet armature ( 26 ; 26a ; 85 ) and the valve slide ( 55 ; 55a 70 ; 70a ) are positively connected with each other. Pressure control valve according to claim 3, wherein the pressure regulating valve ( 10 ; 10a ; 10b ; 10c ) a damping chamber between a piston portion ( 58 ; 58a ; 73 ; 73a ) and a lock washer ( 52 ; 67 ) with integrated aperture hole ( 53 ; 68 ) having.