JP2009162382A - Hydraulic switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid a disadvantage that a hydraulic switching device is provided with an electronic control device integrally, and an assembling line and consequently a related inspection process should be guided together. <P>SOLUTION: A metal section 3 is provided with a heat transfer surface 22 for directly transferring heat to a transmission assembling surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hydraulic switching device for controlling a vehicle automatic transmission, comprising a valve plate having a metal section and having a hydraulic control element and a slider valve, and a hydraulic control element An electronic control device for operating and controlling the hydraulic control element can be attached to the metal section with a passage plate made of plastic having a fluid-guided passage for supplying fluid to It relates to a switching device.

  In the prior art, the automatic transmission of a motor vehicle, for example a passenger car (Pkw), is switched via hydraulic control. In this case, for example, a hydraulic control element such as an electromagnetically operated pressure controller and an electromagnetic valve, and a hydraulic slider valve for increasing pressure are accommodated in a so-called hydraulic switching device. Such a hydraulic switching device is also called a hydraulic control unit (HSG).

  A hydraulic control device is known from DE 10101091 A1. This control device has a valve plate and a passage plate, and a seal plate is interposed between the valve plate and the passage plate. In this case, the seal plate is formed as a seal thin plate. While the valve plate and the passage plate have heretofore been manufactured from metal, preferably aluminum die casting, DE 10101091 A1 seeks to present a lightweight and inexpensive embodiment of a hydraulic control device. In DE 10101091 A1, the passage plate is made entirely of plastic and the valve plate is mostly made of plastic. Only a small metal section is machined into the valve plate to accommodate electronic control equipment.

  Certainly the hydraulic switching device of DE 10101091A1 is cheaper and lighter than the previously known hydraulic switching device, but the heat released from the electronic control device can be derived quickly enough. Since this is not possible, the probability of switching device failure is significantly increased.

  Within the scope of the above specification, the valve plate is understood to be a device comprising an electromagnetically controlled solenoid valve and / or a pressure controller. The conventional valve plate further includes a hydraulic slider valve controlled by a solenoid valve and / or a pressure controller. This slider valve increases the hydraulic pressure switched by a solenoid valve and / or a pressure controller.

  A passage plate is understood as a device having a passage for the guidance of fluids, in particular hydraulic liquids. In order to tightly connect the distribution plate and the passage plate to each other, the plate is screwed with a plurality of screws to a seal plate arranged between them, which is configured as a seal lamina.

  In this case, the materials used for the valve plate and the passage plate are suitable for use in fluids used in automatic transmissions (ATF; automatic transmission fluid), in particular in transmissions from −40 ° C. to + 150 ° C. It has material properties that can be used in the temperature range.

DE10101091A1

  The DE 10101091 A1 hydraulic switching device also has other drawbacks. In other words, the device described in the above specification has the disadvantage that the hydraulic switching device is integrally provided with an electronic control device and that the assembly line and thus the associated inspection process must be guided together. is doing. High temperatures during the inspection process are inconvenient for electronic equipment. Therefore, the probability of failure of the hydraulic switching device is further increased.

  Therefore, in view of the above prior art, the object of the present invention is to avoid the above disadvantages from the prior art.

  In order to solve the above-mentioned problems, a hydraulic switching device for controlling a vehicle automatic transmission according to the present invention includes a valve plate having a metal section having a hydraulic control element and a slider valve, Electronic control for operating and controlling the hydraulic control element in the metal section, comprising a passage plate made of plastic with a fluid-guided passage for supplying fluid to the hydraulic control element The apparatus can be mounted such that the metal section has a heat transfer surface for transferring heat directly to the transmission assembly surface.

  Advantageous embodiments are described in the dependent claims.

  That is, preferably the distance between the metal section and the mounting surface is as small as possible, preferably zero, so that the valve plate is made of a completely metallic material.

  Preferably, a seal plate is provided between the passage plate and the valve plate.

  Preferably, the seal plate is made of metal.

  Preferably, the passage plate has a seal section in direct contact with the valve plate.

  Preferably, the seal section is a component in which the passage plate is incorporated.

  Preferably, the seal section has a seal portion inserted into the passage plate.

  Preferably, the seal portion is embedded in the passage plate to be injection molded.

  Preferably, the passage plate and the valve plate are pressed together to be coupled.

  Preferably, the passage plate has a notch on the opposite side to the valve plate to reduce weight and / or the valve plate is reinforced by a bushing to have a through hole for receiving a mounting screw. Have.

  The above configuration of the hydraulic switching device makes it possible for the heat released by the electronic control device to be released particularly quickly to the heat sink, that is to say the casing made from the usual metal of the transmission. . As the control device is joined directly to the metal section of the valve plate and is in heat transfer coupling with the casing through the metal section, the hydraulic switching device is a device that continuously reduces the probability of failure over a long period of time Sufficient heat derivation is ensured so that it can be used. Furthermore, inexpensive manufacturing becomes possible. In addition, a weight reduction of the hydraulic switching device is achieved.

  Advantageous embodiments are described in detail below.

  It is particularly advantageous if the distance between the metal section and the mounting surface is as small as possible, preferably zero, in particular in this case if the valve plate is made of a completely metallic material. As a result, the valve plate can be manufactured relatively simply because it consists of only one material, ie metal. The freedom of assembly relative to the transmission of the valve plate is increased. Regardless of where the valve plate is in contact with the transmission, a thermal bridge is formed between the electronic control unit and the transmission. The result is effective heat derivation. The smaller the distance between the metal section and the assembly surface, the faster the heat generated from the electronic controller can be derived.

  When a seal plate is provided between the passage plate and the valve plate, leakage from the fluid guide passage can be effectively prevented.

  It is advantageous if the sealing plate is made of metal in another embodiment so that the cheapest possible seal can be used. As a result, the seal plate can be used in the form of a thin seal plate. This leads to a reduction in stockpiling of individual component parts.

  In yet another embodiment, it is particularly advantageous if the passage plate has a sealing section that is in direct contact with the valve plate. In this embodiment, the use of a separate seal plate can be avoided. This reduces the diversification of the components, thereby saving costs. In order to ensure hermeticity when the seal plate is omitted, it is advantageous if the seal section is an integrated (integrated) component of the passage plate. In this way, the assembly can be simplified in such a form. This is because no additional insertion of the seal plate is required. On the contrary, the valve plate is mounted directly on the passage plate, so that the sealing of the fluid guide passage has already been achieved. In general, the high pressure fluid is guided in the passage, and in yet another embodiment, it is advantageous if the seal section has a seal inserted into the passage plate. This is because it can advantageously accommodate the appropriate chemical conditions of the fluid guided in the passage.

  In a further embodiment, it is advantageous if the seal is embedded in the passage plate by injection molding when the pressure in the passage is high, especially in order to ensure hermeticity even when using erodible high-pressure liquids. is there. In this way, the possibility that the seal part does not fall off relative to the passage plate when assembled with the valve plate is additionally ensured.

  In yet another embodiment, it is particularly advantageous if the passage plate and the valve plate are pressed together and joined. In this case, such pressing can be achieved inexpensively through conventional coupling means, in particular via screws, rivets or bending.

  The passage plate has a recess on the opposite side of the valve plate to reduce weight and / or the passage plate is reinforced with a bush and has a through-hole for receiving a mounting screw; The total weight of the hydraulic switching device can be reduced. This leads to a reduction in the fuel of the motor vehicle, so that the hydraulic switching device is used there and / or passage plate damage is prevented during assembly. The bushing machined into the passage plate introduces force into the plastic passage plate without damaging it. Since plastic relaxation occurs over the lifetime, the preload can advantageously be ensured for a long time by a bush made from metal. Breakage or cracking of the passage plate when tightening the screws is more effectively prevented while the valve plate and passage plate are pressed together.

1 is a schematic cross-sectional view of a hydraulic switching device with an assembled electronic control device, where the switching device is attached to a transmission. FIG. 1 shows another form of the hydraulic switching device that is not provided with a sealing plate, which is replaced by a sealing part that is injection molded in the passage plate. FIG. 2 shows a second embodiment of the hydraulic switching device of FIG. 1, and the seal plate is omitted by press connection between a metal valve plate and a passage plate made of plastic.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 shows a hydraulic switching device 1. This hydraulic switching device 1 has a valve plate 2 with a metal section 3.

  In the embodiment illustrated in FIG. 1, the valve plate 2 is made entirely of metal. For this reason, it has proved advantageous to use aluminum casting. The valve plate 2 is provided with a notch for accommodating the hydraulic control element 4.

  A hydraulic control element 4 is formed as a reinforcing slider 5 on one side of the valve plate 2. Advantageously, this reinforcing slider 5 is made of metal. Since the reinforcing slider 5 made of metal is movably disposed in the notch of the metal valve plate 2, distortion based on different material properties can be prevented. In DE 10101091 A1, the metal reinforced slider is movable within a notch in a valve plate made of plastic, which causes inconvenient leaks or unsmooth movement in this configuration, which is This is avoided in the hydraulic switching device 1 according to the invention.

  A hydraulic control element 4 is formed as a slider valve or pressure controller 6 on the side of the valve plate 2 opposite to the reinforcing slider 5. An electronic control device 7 is arranged in the region of the valve plate 2, in particular the metal section 3. This electronic control device 7 is also called a transmission control unit (transmission control unit; TCU) or an electronic circuit. The electronic control device 7 is in direct thermal contact with the metal section 3. The electronic control device 7 gives control instructions to the slider valve / pressure controller 6 via the contact connection unit 8.

  The electronic control device 7 is surrounded by a circuit module 9. This circuit module 9 sends critical information about the control to the contact connection unit 8 and then to the circuit module 9.

  A passage plate 10 is arranged on the opposite side of the valve plate 2 from the electronic control device 7. In the embodiment illustrated in FIG. 1, a further optional seal plate 11 is arranged between the passage plate 10 and the valve plate 2. The sealing plate 11 is made of metal and is preferably formed as a sealing sheet.

  The passage plate 10 is made of plastic. Only in the area of the notch 12 is a metal insert in the form of a bush. The bushing and thus the notch 12 are also removed, and a mounting element, preferably formed as a screw 14, projects. Other attachment means such as rivets or pins can also be used. In addition to the notch 12, a recess 15 is provided in the passage plate 10 to reduce the weight. However, these recesses 15 do not protrude into the region of the passage 16. There is high pressure fluid in the passage 16. This high-pressure fluid reaches the hydraulic control element 4 via a corresponding fluid line.

  The electronic control device 7 generates heat during operation. This heat is led to the transmission 17 via the valve plate 2, in particular the metal section 3, via the heat flow Q indicated by the arrow. The transmission 17 has a protrusion 18. This protrusion 18 is in direct contact with the metal section 3 of the valve plate 2 and thus allows simple heat extraction.

  In this embodiment, the entire valve plate 2 is made of metal. However, it is sufficient if only the metal section 3 of the valve plate 2 is made of metal independently of the other parts of the valve plate 2. In this case, the other part of the valve plate 2 may be made of plastic. In such a case, however, the metal section 3 must likewise be provided with a notch for the hydraulic control element 4. It is also necessary to ensure the heat transfer of the electric control device 7 directly to the projection 18 of the transmission 17 via the metal section 3. A sufficiently deep hole in the metal section 3 needs to be appropriately provided to avoid long reinforcement sliders of about 60-80 mm, or leaks. In this case, the hole can be formed as a hole, a milling part or a post-machined hole.

  In order to allow the omission of the seal plate 11 which leads to further weight savings, cost reduction and simple assembly of the hydraulic switching device, another alternative as shown in FIGS. In the embodiment, the seal section 19 is machined into the passage plate 10.

  FIG. 2 shows a schematic cross-sectional view of the periphery of one passage 16 of the passage plate 10 in combination with the valve plate 2. The gap 20 provided between the valve plate 2 and the passage plate 10 is greatly exaggerated. In the first alternative form shown, the seal section 19 is shown as a separate seal 21 inserted into the shoulder of the passage 16. The seal portion 21 is embedded in the passage plate 10 made of plastic by injection molding. In this case, the sealing part 21 is particularly adapted to the sealing of the passage 16 with regard to material selection. The material selection of the seal portion 21 is particularly resistant to the outflow of high-pressure fluid and is well sealed.

  In the first alternative form of FIG. 2, the separate seal 21 is machined into the passage plate 10, while the second alternative shown in FIG. Is omitted, and the seal section 19 is integrated as a part of the passage plate 10. However, the plastic selected for the manufacture of the passage plate 10 is particularly suitable for sealing the high-pressure fluid-guided passage 16. In addition, the passage plate 10 is pressed against the valve plate 2 at high pressure.

  2 and 3 are structurally the same as those described in FIG. 1 except for the seal portion. In FIG. 1, the heat transfer surface is indicated by reference numeral 22. This heat transfer surface 22 forms an assembly surface for mounting the transmission 17 in the casing of the transmission 17, in particular the projection 18. In this case, the heat transfer surface is formed as a transmission assembly surface.

  In the case of a configuration according to the invention of the control device 1, for example DE 10101091 A1, it is described that the hydraulic liquid in the lower passage of the control device can be heat-derived, for example an additional control device 7 There is no need to provide an oil cooling section. It is also possible to incorporate this cooling possibility together as another embodiment.

  DESCRIPTION OF SYMBOLS 1 Switching device, 2 Valve plate, 3 Metal division, 4 Control element, 5 Reinforcement slider, 6 Pressure controller, 7 Control device, 8 Contact connection unit, 9 Switching module, 10 Passage plate, 11 Seal plate, 12 Notch, 13 Bush, 14 Screw, 15 Recess, 16 Passage, 17 Transmission, 18 Projection, 19 Seal section, 20 Gap, 21 Seal, 22 Heat transfer surface

Claims (10)

  A hydraulic switching device (1) for controlling a vehicle automatic transmission, comprising a hydraulic control element (4) and a slider valve (6), and a valve plate (2) having a metal section (3) Comprising a passage plate (10) made of plastic and having a fluid-guided passage (16) for supplying fluid to a hydraulic control element (4), said hydraulic section being in said metal section (3) In a hydraulic switching device for controlling a vehicle automatic transmission, to which an electronic control device (7) for operating and controlling the control element (4) can be attached, the metal section (3) comprises: The vehicle automatic transmission has a heat transfer surface (22) for transferring heat directly to the transmission assembly surface. Switching device hydraulic for controlling ® down.   The distance between the metal section (3) and the mounting surface is as small as possible, preferably zero, and the valve plate (2) is made of a completely metallic material. 1. A hydraulic switching device according to 1.   The hydraulic switching device according to claim 1 or 2, wherein a seal plate (11) is provided between the passage plate (10) and the valve plate (2).   The hydraulic switching device according to any one of claims 1 to 3, wherein the seal plate (11) is made of metal.   The hydraulic switching device according to claim 1 or 2, wherein the passage plate (10) has a sealing section (19) in direct contact with the valve plate (2).   6. The hydraulic switching device according to claim 5, wherein the sealing section (19) is a component in which the passage plate (10) is incorporated.   6. Hydraulic switching device according to claim 5, wherein the sealing section (19) has a sealing part (21) inserted into the passage plate (10).   8. The hydraulic switching device according to claim 7, wherein the sealing part (21) is embedded in the passage plate (10) to be injection molded.   The hydraulic switching device according to any one of claims 1 to 8, wherein the passage plate (10) and the valve plate (2) are pressed against each other.   The passage plate (10) has a recess (15) for reducing weight on the opposite side of the valve plate (2) and / or the valve plate (10) is reinforced by a bush (13) The hydraulic switching device according to claim 1, further comprising a through hole for accommodating the mounting screw (14).

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