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WO2005028925A1 - Appareil de commande hydraulique - Google Patents

Appareil de commande hydraulique Download PDF

Info

Publication number
WO2005028925A1
WO2005028925A1 PCT/EP2004/009288 EP2004009288W WO2005028925A1 WO 2005028925 A1 WO2005028925 A1 WO 2005028925A1 EP 2004009288 W EP2004009288 W EP 2004009288W WO 2005028925 A1 WO2005028925 A1 WO 2005028925A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching device
transmission
hydraulic
control unit
hydraulic switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2004/009288
Other languages
German (de)
English (en)
Inventor
Michael Riedhammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of WO2005028925A1 publication Critical patent/WO2005028925A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H2059/683—Sensing pressure in control systems or in fluid-controlled devices, e.g. by pressure sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H2061/0046—Details of fluid supply channels, e.g. within shafts, for supplying friction devices or transmission actuators with control fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H2061/0068—Method or means for testing of transmission controls or parts thereof

Definitions

  • the present invention relates to a hydraulic switching device for motor vehicle transmissions, in particular power shift transmissions, which supplies the switching elements arranged in the transmission with pressure oil, according to the preamble of claim 1.
  • Powershift transmissions are usually equipped with electrohydraulic transmission controls which, depending on an external control, provide the correct switching element with pressure oil. Such controls are currently used in different designs.
  • the simplest type is the so-called resolved design, in which insert or screw-in valves are placed directly in the gear housing at a suitable location.
  • the advantage of this type is that without additional components, such as valve blocks, a mostly inexpensive but low-function gear shift can be represented.
  • the disadvantage lies in additional machining of the gear housing and in the maintenance of small amounts of residual dirt in a large component. In addition, it is not possible to subject the overall control to an upstream function test.
  • Another design is mostly used for planetary gears with coaxial drive and output.
  • the compact design of the gearbox makes it possible to supply pressure to the switching elements directly through the gearbox housing.
  • the advantage lies in the compact dimensions, the possibility of module formation, the separate Verifiability and compliance with the required purity.
  • Machine gearboxes and in particular construction machine gearboxes, which have a greater offset between drive and output, are often provided with an externally arranged control block in addition to the first type mentioned at the beginning, which contains all the hydraulic functions.
  • the switching elements which are usually distributed over several shafts, are supplied with pressure via oil distributor plates, which are often quite large and therefore difficult to manufacture.
  • oil supply pipes or hoses must be provided inside or outside the gear unit.
  • the advantage lies in the compact dimensions of the hydraulic unit, the simple attachment to a free location on the gear housing and the flexible oil guide. External pressure measuring points are still required even in modern machine gearboxes. Disadvantages are the large number of sealing points, the complex seals and the screw connection that must be designed very carefully.
  • a device for sealing a hydraulic control unit, which is mounted on the underside of an automatic transmission for a motor vehicle, is described in DE A 195 33 977 by the applicant.
  • An electronic transmission control unit provided for the automatic transmission forms the parameters required for controlling the automatic transmission from input variables, signals provided by sensors and signals provided by other electronic control units such as the engine control unit serving as input variables.
  • the electronic transmission control unit controls the electromagnetic actuators, which are located in the hydraulic control unit, via output signals. Circuits are initiated via the electromagnetic actuators in which a corresponding clutch / Brake combination is selected. In addition, the pressure curve during the switching and the pressure level outside the switching are controlled via the electromagnetic actuators.
  • the hydraulic control device in this known automatic transmission is located within the transmission and is fastened to the transmission housing by means of screws and has a snorkel with sieve, a valve housing, an intermediate plate with a seal and a channel plate.
  • the hydraulic control unit is partially wetted by the lubricant sump. This type of installation of the hydraulic control unit in the transmission serves to ensure safe oil intake.
  • the object of the present invention is to provide a hydraulic control device for motor vehicle transmissions, in particular powershift transmission, which is particularly simple in construction and therefore inexpensive to produce, which ensures the arrangement of external accessible pressure measuring points, which is easy to assemble, has a modular structure " and enables the control components in the transmission to be kept as clean as possible.
  • the invention is therefore based on a hydraulic switching device for a motor vehicle transmission, in particular a powershift transmission, which supplies the switching elements arranged in the transmission with pressure oil and which is connected to the transmission housing via an interface.
  • the interface is a flange which has a large number of distributor bores which connect to the pressure Oil to the switching lines promoting pressure lines are adjusted.
  • These pressure lines can be fastened and sealed in the gear housing in different ways.
  • the hydraulic switching device is preferably connected directly to an electronic control device, as a result of which only the electrical feed lines are led into the control device and the hydraulic switching device is sealed to the transmission housing via a single sealing point. Since the distribution lines are arranged within the gear housing, a complex sealing of these points is not necessary.
  • This type of connection of the electronic control unit to the hydraulic switching device on the transmission housing is particularly advantageous when used in work machines, since only the electrical leads have to be routed to the control unit, but the hydraulic switching device can also be separated from the transmission housing in order to be used in a test facility to check for functionality.
  • This hydraulic switching device advantageously has measuring connections by means of which the functions can also be checked in the vehicle.
  • the flange is advantageously provided with pressure measuring points accessible from the outside.
  • FIG. 1a shows a front view of a flange according to the invention
  • Fig. 1 b shows a section through part of a gear housing, the flange and gear housing being disassembled
  • Fig. 2 shows the flange and part of the gear housing in the assembled state.
  • 1 denotes the hydraulic switching device for a powershift transmission, which is not known and is known per se, which supplies the switching elements arranged in the transmission with pressure oil and which can be connected to the transmission housing via an interface.
  • This interface is a flange 2, in which a multiplicity of distributor bores 3 are provided, so that the supply and discharge of the pressure oil take place on the one hand via these distributor bores and on the other hand via adapted bores or line connections 5 in the transmission housing 4.
  • the flange 2 can be seen in front view and therefore not connected to the gear housing 4 shown in Fig. 1b.
  • the advantage is also achieved that the easy-to-install oil lines are laid inside the transmission, that the hydraulic switching device has a modular structure that a separate testability of the hydraulic switching device is given and that the control components are kept as clean as possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention concerne un appareil de commande hydraulique destiné à des boîtes de vitesses de véhicules automobiles, notamment à des boîtes couplables sous charge. Cet appareil alimente en huile sous pression les éléments de commande montés dans la boîte et est raccordé par l'intermédiaire d'un élément de jonction au carter de boîte (4). L'élément de jonction se présente sous la forme d'une bride (2) comportant une pluralité d'orifices de distribution (3) qui sont adaptés aux conduites hydrauliques et à leurs éléments de raccordement (5), installés dans la boîte et acheminant l'huile sous pression aux éléments de commande.
PCT/EP2004/009288 2003-09-11 2004-08-19 Appareil de commande hydraulique Ceased WO2005028925A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003142543 DE10342543A1 (de) 2003-09-11 2003-09-11 Hydraulisches Schaltgerät
DE10342543.8 2003-09-11

Publications (1)

Publication Number Publication Date
WO2005028925A1 true WO2005028925A1 (fr) 2005-03-31

Family

ID=34352834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/009288 Ceased WO2005028925A1 (fr) 2003-09-11 2004-08-19 Appareil de commande hydraulique

Country Status (2)

Country Link
DE (1) DE10342543A1 (fr)
WO (1) WO2005028925A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284216A2 (fr) * 1987-03-23 1988-09-28 General Motors Corporation Montage de vannes pour transmission automatique
DE4041253A1 (de) * 1990-12-21 1992-06-25 Zahnradfabrik Friedrichshafen Automatikgetriebe fuer kraftfahrzeuge
EP0967417A2 (fr) * 1998-06-24 1999-12-29 Fuji Jukogyo Kabushiki Kaisha Circuit hydraulique pour une boíte de vitesses automatique
US20030075138A1 (en) * 2001-09-19 2003-04-24 Yoshiaki Hori Internal combustion engine with hydraulically operated automatic transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284216A2 (fr) * 1987-03-23 1988-09-28 General Motors Corporation Montage de vannes pour transmission automatique
DE4041253A1 (de) * 1990-12-21 1992-06-25 Zahnradfabrik Friedrichshafen Automatikgetriebe fuer kraftfahrzeuge
EP0967417A2 (fr) * 1998-06-24 1999-12-29 Fuji Jukogyo Kabushiki Kaisha Circuit hydraulique pour une boíte de vitesses automatique
US20030075138A1 (en) * 2001-09-19 2003-04-24 Yoshiaki Hori Internal combustion engine with hydraulically operated automatic transmission

Also Published As

Publication number Publication date
DE10342543A1 (de) 2005-06-23

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