Fluid control with a control plate arrangement

Abstract

Fluid control with a control plate arrangement (4), wherein a jet pump (10) is partially integrated into the control plate arrangement (4) and a drive device (15) of the jet pump (10) is mounted in the control plate arrangement (4), characterized in that the drive device (15) of the jet pump (10) comprises a support body (18) which is arranged in a control plate (6) of the control plate arrangement (4).

Description

[0001] The invention relates to a fluid control with a control plate arrangement.

[0002] German patent application DE 10 2010 054 250 A1 discloses a hydraulic control system with a control plate arrangement and a hydraulic pumping device integrated into the control plate arrangement. German patent application DE 198 26 747 A1 discloses a transmission with a transmission control system and a pump designed as a suction jet pump. German patent application DE 10 2005 042 685 A1 discloses a transmission with an oil pump designed as a suction jet pump. Publication DE 38 78 319 T2 discloses a fluid control system with a control plate arrangement in which a jet pump is partially integrated into the control plate arrangement.

[0003] The object of the invention is to improve a fluid control with a control plate arrangement, in particular with regard to the available installation space and / or the manufacturing costs.

[0004] The object is achieved in a fluid control with a control plate arrangement in that a jet pump is partially integrated into the control plate arrangement, wherein a drive device of the jet pump is mounted in the control plate arrangement and the drive device of the jet pump comprises a support body which is arranged in a control plate of the control plate arrangement.

[0005] The jet pump is preferably designed as a suction jet pump. The control plate arrangement comprises at least one control plate, preferably several control plates, arranged in a plate construction. The fluid control is preferably designed as a hydraulic control. German Offenlegungsschrift DE 10 2010 054 250 A1 discloses a hydraulic conveying device comprising two gear pumps integrated into two control plates. The control plates represent a main part of the pump housing, which is closed off by a cover. The present invention, in contrast, relates to a jet pump, in particular a suction jet pump, which does not actually comprise a housing. Suction jet pumps, for example, comprise a drive tube and a mixing tube. Due to its expansion, at least the mixing tube is rather unsuitable for being completely accommodated within the control plate arrangement.Therefore, a designer will tend to refrain from integrating a jet pump, in particular a suction jet pump, into a control plate arrangement. The present invention overcomes this design problem in that the jet pump is only partially integrated into the control plate arrangement. The solution according to the invention makes it possible to reduce the installation space required for the jet pump compared to a separate arrangement of the jet pump. In addition, the function of the jet pump can be improved because a pressure oil connection between the control plate arrangement and the jet pump can be omitted. The fluid control according to the invention is preferably used in hydraulically operated automatic transmissions, where the jet pump is used to briefly provide large volume flows at a low pressure level. The large volume flows serve, for example, to cool at least one wet clutch.

[0006] The drive mechanism can be easily and securely mounted in the control plate assembly. Mounting the drive mechanism in the control plate assembly advantageously provides stable anchoring of the drive mechanism without the need for additional fastening devices.

[0007] The support body is preferably fully integrated into the control plate assembly. The support body according to the invention particularly advantageously enables the drive device to be fixed in the control plate assembly without additional fastening elements.

[0008] A further preferred embodiment of the fluid control system is characterized in that the support body is fixed in a recess of the control plate by an intermediate element. The intermediate element is preferably an intermediate plate arranged between two control plates of the control plate assembly. During assembly of the control plate assembly, the support body is first arranged in the recess of the control plate. The support body is then easily and securely fixed in place using the intermediate element. The intermediate element advantageously serves to at least partially close the recess with the support body.

[0009] A further preferred embodiment of the fluid control system is characterized in that the support body supports a drive tube of the jet pump and / or comprises at least one fluid intake channel. The drive tube serves to generate a fluid jet that sucks in and accelerates a suction medium through momentum exchange. The drive tube is preferably made of a different material than the support body. For functional reasons, the drive tube is advantageously made of metal. In contrast, the support body can be made of a different material, for example, plastic, for functional reasons, which can reduce manufacturing costs. During operation of the jet pump, a suction medium is sucked in via the fluid intake channel. The suction medium is, for example, hydraulic medium sucked from a hydraulic medium tank.

[0010] Another preferred embodiment of the fluid control system is characterized in that the drive tube is overmolded with the support body. Overmold the drive tube, which is preferably made of metal, with a support body made of plastic, enabling simple industrial production of the drive device in large quantities.

[0011] A further preferred embodiment of the fluid control system is characterized in that a mixing tube is mounted on the control plate arrangement, in particular on the control plate. The mixing tube is preferably made of plastic and can be a plastic injection-molded part, and has a significantly greater extension than the drive tube. Therefore, it is advantageous for the mixing tube to be arranged completely or almost completely outside the control plate arrangement. By mounting the mixing tube on the control plate arrangement, in particular on the control plate, additional fastening elements for attaching the mixing tube to the control plate arrangement can be omitted. The mixing tube is particularly advantageously screwed to the control plate.

[0012] A further preferred embodiment of the fluid control system is characterized in that the drive tube extends from the intermediate element through the support body and the control plate into the mixing tube. This simplifies, on the one hand, a stable fixation of the drive tube in the control plate arrangement. Furthermore, the suction of a suction medium via a further control plate, which is arranged on the side of the intermediate element facing away from the drive tube, is simplified.

[0013] A further preferred embodiment of the fluid control system is characterized in that a second plate of the control plate arrangement comprises a drive medium supply channel and / or at least one suction opening of the jet pump. The intermediate element is preferably arranged between the first-mentioned plate and the second plate of the control plate arrangement. The inventive arrangement of the drive device in the first-mentioned control plate enables the function of the suction jet pump in a particularly simple manner without additional connecting elements for supplying medium.

[0014] A further preferred embodiment of the fluid control system is characterized in that at least one non-return valve is pivotably mounted on the support body between an open position and a closed position. The non-return valve serves to open or close a fluid intake channel extending through the support body as needed. This can advantageously prevent unwanted backflow of medium through the support body.

[0015] The invention may also relate to a control plate and / or an intermediate element for a fluid control system as described above. Furthermore, the invention may relate to a separately tradable drive device, in particular individual parts of the drive device, a mixing tube, and / or a check valve, as described above.

[0016] Further advantages, features, and details of the invention will become apparent from the following description, in which various embodiments are described in detail with reference to the drawings. They show: Fig. 1 is an overall view of a fluid control system according to the invention in longitudinal section through a jet pump; Fig. 2 a first perspective view of a drive device of the jet pump from Fig. 1; Fig. 3 a second perspective view of the drive device from Fig. 2; Fig. 4 a longitudinal section through the drive device from the Fig. 2 and Fig. 3 and Fig. 5 an enlarged section of Fig. 1 in a opposite Fig. 1 twisted longitudinal section.

[0017] In the Fig. 1 to 5 show a fluid control system 1 with a control plate assembly 4 in various sections and views. The control plate assembly 4 comprises a first control plate 6 and a second control plate 7. The fluid control system 1 with the control plate assembly 4, which is preferably designed as a hydraulic control system, is also referred to as a plate-type hydraulic control system. The hydraulic control system 1 is used, for example, in automatic transmission applications.

[0018] An intermediate element 9 is arranged between the two control plates 6, 7. The intermediate element 9 is advantageously designed as an intermediate plate. The control plates 6, 7 are made, for example, of a die-cast aluminum material.

[0019] A jet pump 10 designed as a suction jet pump is partially integrated into the control plate assembly 4. The jet pump 10 comprises a mixing tube 11 and a drive tube 12. The mixing tube 11 is attached to the outside of the control plate 6 and extends away from the control plate assembly 4 into Fig. 1 up.

[0020] A main extension direction of the mixing tube 11, which corresponds to a longitudinal axis of the mixing tube 11, runs perpendicular to the main extension directions of the control plates 6, 7. The mixing tube 11 is screwed to the control plate 6 with its end facing the control plate arrangement 4. The end of the mixing tube 11 facing away from the control plate arrangement 4 preferably projects into a transmission housing when the fluid control system 1 is installed.

[0021] The propulsion tube 12 is part of a propulsion device 15 and serves to generate or concentrate a propulsion jet. The propulsion tube 12 is overmolded with a plastic support body 18. For sealing, an O-ring 19 is arranged between the support body 18 and the intermediate element 9. The propulsion tube 12 extends from the intermediate element 9 through the support body 18 into the mixing tube 11. The free end of the propulsion tube 12, which projects into the mixing tube 11, tapers conically.

[0022] The support body 18 is arranged in a recess 20 of the control plate 6. The recess 20 is, in Fig. 1, opens upwards into the mixing tube 11. A base body 25 of the support body 18 surrounds the drive tube 12. The base body 25 of the support body 18 is integrally connected to four posts 21, 22, 23, 24, which are formed on the outside of the support body 18.

[0023] The support body 18 is clamped by the four posts 21 to 24 between a shoulder 26 formed on the control plate 6 and the intermediate element 9. The base body 25 of the support body 18 comprises a total of three fluid intake channels 27, 28, each of which can be closed by a check valve 31, 32, 33. The check valves 31, 32, 33 are each pivotally connected to the support body 18 via a hinge 51, 53. The hinges 51, 53 enable the check valves 31, 32, 33 to move between an open position and a closed position.

[0024] The fluid intake channels 27, 28 are each connected to a suction opening 41, 42 via a through hole in the intermediate element 9. The suction openings 41, 42 are also referred to as suction kidneys and are connected to a tank or reservoir containing the hydraulic medium. When the check valves 31 to 33 are open, hydraulic medium can be sucked from the tank or reservoir into the mixing tube 11 via the suction openings 41, 42, the through holes in the intermediate element 9, and the fluid intake channels 27, 28.

[0025] Such suction of the hydraulic medium is effected by a propellant jet or jet injected from the conical end of the propellant tube 12 into the mixing tube 11. The propellant jet is generated by a suitable propellant medium, such as hydraulic medium, in particular hydraulic oil, which is supplied to the control plate 7 via a propellant medium supply channel 40. The propellant medium is subjected to a suitable propellant pressure and passes from the propellant medium supply channel 40 into the propellant tube 12 via a through hole in the intermediate element 9.

[0026] When assembling the control plate assembly 4, the drive device 15 is first arranged in the recess 20 of the control plate 6. The drive device 15 is then held in the recess 20 of the control plate 6 by the intermediate element 9. For this purpose, the two plates 6, 7 are screwed together with the intermediate element 9 interposed.

[0027] The propellant required to operate the jet pump is supplied to the lower control plate 7 via the propellant supply channel 40. The propellant tube 12 focuses the propellant jet, which exits the propellant tube 12 into the mixing tube 11.

[0028] The check valves 31, 32, 33 rest in their closed position on the support body 18 in such a way that the corresponding fluid intake channels 27, 28 are closed. In the closed position, the check valves 31 to 33 represent a check function and prevent a backflow of hydraulic medium from the mixing tube 11 into the Fig. 1 and Fig. 5 from top to bottom. When the fluid intake channels 27, 28 are in the Fig. 1 and Fig. 5 from bottom to top, then the check valves 31, 32, 33 open and allow hydraulic medium to be sucked from the suction kidneys 41, 42 into the mixing pipe 11.

[0029] In the open position, the check valves 31 to 33 rest against stops 55, 56 formed on the control plate 6. The stops 55, 56 are designed and arranged such that the check valves 31 to 33 close reliably under the influence of gravity unless they are subjected to a compressive force acting in the opening direction.

[0030] The hinges 51, 53 of the check valves 31 to 33 are advantageously equipped with a basic clearance, which serves to compensate for positional tolerances between the check valve 31, 32, 33 and the corresponding sealing surface on the support body 18. Furthermore, the clearance ensures that, in the event of minor flatness deviations, the check valves 31 to 33 are ideally pressed onto the corresponding sealing surface by the hydraulic medium column above them. List of reference symbols 1 Fluid control 4 Control plate arrangement 6 Control plate 7 Control plate 9 Intermediate element 10 jet pump 11 Mixing tube 12 Drive tube 15 Driving device 18 supporting bodies 19 O-ring 20 recess 21 posts 22 posts 23 posts 24 posts 25 basic bodies 27 Fluid intake channel 28 Fluid intake channel 31 Check valve 32 check valve 33 Check valve 40 Driving medium supply channel 41 Suction opening 42 Suction opening 51 Hinge 53 Hinge 55 stop 56 stop

Claims

[1] Fluid control with a control plate arrangement (4), wherein a jet pump (10) is partially integrated into the control plate arrangement (4) and a drive device (15) of the jet pump (10) is mounted in the control plate arrangement (4), characterized by that the drive device (15) of the jet pump (10) comprises a support body (18) which is arranged in a control plate (6) of the control plate arrangement (4). [2] Fluid control according to claim 1, characterized by that the support body (18) is fixed in a recess (20) of the control plate (6) by an intermediate element (9). [3] Fluid control according to claim 1 or 2, characterized by that the support body (18) carries a drive tube (12) of the jet pump (10) and / or comprises at least one fluid intake channel (27, 28). [4] Fluid control according to claim 3, characterized by that the drive tube (12) is overmolded with the support body (18). [5] Fluid control according to one of the preceding claims, characterized by that a mixing tube (11) is mounted on the control plate arrangement (4), in particular on the control plate (6). [6] Fluid control according to claim 5, characterized by that the drive tube (12) extends from the intermediate element (9) through the support body (18) and the control plate (6) into the mixing tube (11). [7] Fluid control according to one of the preceding claims, characterized by that a second plate (7) of the control plate arrangement (4) comprises a drive medium supply channel (40) and / or at least one suction opening (41, 42) of the jet pump (10). [8] Fluid control according to one of claims 1 to 7, characterized by that at least one non-return valve (31,32,33) is pivotally mounted on the support body (18) between an open position and a closed position.

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