WO2008094142A1 - Module thermoplastique de contrôle hydraulique de transmission automatique - Google Patents

Module thermoplastique de contrôle hydraulique de transmission automatique Download PDF

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Publication number
WO2008094142A1
WO2008094142A1 PCT/US2007/002478 US2007002478W WO2008094142A1 WO 2008094142 A1 WO2008094142 A1 WO 2008094142A1 US 2007002478 W US2007002478 W US 2007002478W WO 2008094142 A1 WO2008094142 A1 WO 2008094142A1
Authority
WO
WIPO (PCT)
Prior art keywords
main body
control module
fibers
hydraulic control
accordance
Prior art date
Application number
PCT/US2007/002478
Other languages
English (en)
Inventor
Robert M. Russell
Joshua Mcilvaine
Michael Peter Ciaccio
Janardhan R. Yandooru
Narendra Anand Hardikar
Virendra Vilas Gaikwad
Original Assignee
Sabic Innovative Plastics Ip B.V.
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 Sabic Innovative Plastics Ip B.V. filed Critical Sabic Innovative Plastics Ip B.V.
Priority to PCT/US2007/002478 priority Critical patent/WO2008094142A1/fr
Publication of WO2008094142A1 publication Critical patent/WO2008094142A1/fr

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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

Definitions

  • This invention relates generally to automatic transmission hydraulic control systems, and more particularly, to a hydraulic control module formed from a filled thermoplastic material.
  • Known automatic transmissions include planetary gear sets, a plurality of friction elements, for example, clutches and bands, that control the planetary gear sets, and a hydraulic control system to control the friction elements such as the clutches and bands.
  • the hydraulic control system includes transmission fluid, a pump to pump the transmission fluid, and a hydraulic control module that includes a plurality of fluid passageways through which the transmission fluid flows.
  • the hydraulic control module is fabricated from a metal, for example, aluminum, usually by casting methods.
  • the fabrication includes machining the main body of the hydraulic control module to obtain the required tolerances for any sealing surfaces and any mounting holes for any attached valves. Machining aluminum castings requires machine set-up time, machining time, and cleaning of the machined part to remove all debris. Also, aluminum castings can have porosity that can cause high scrap rates. Further, die cast tooling often requires refurbishing at about 100,000 part intervals which adds to the maintenance cost of a fabricating system.
  • an automatic transmission hydraulic control module assembly includes a main body having a first side and an opposing second side.
  • the main body includes a plurality of fluid passage cavities in the first side, and at least one bore extending from one of the fluid passage cavities through the main body and through the second side.
  • the main body is formed from a filled thermoplastic material that includes at least one filler.
  • a method of fabricating an automatic transmission hydraulic control module assembly is provided.
  • the hydraulic control module assembly includes a main body, and the method includes the steps of providing a mold having a predetermined shape of the main body, injecting a thermoplastic material into the mold to form the main body, and removing the injection molded main body from the mold.
  • the main body has a first side and an opposing second side and includes a plurality of fluid passage cavities in the first side and at least one bore extending from one of the fluid passage cavities through the main body and through the second side.
  • the thermoplastic material includes at least one filler.
  • Figure 1 is an exploded schematic illustration of an automatic transmission hydraulic control module assembly in accordance with an embodiment of the present invention.
  • Figure 2 is an enlarged bottom schematic illustration of a portion of the main body of the hydraulic control module assembly shown in Figure 1.
  • Figure 3 is an enlarged bottom schematic illustration of another portion of the main body of the hydraulic control module assembly shown in Figure 1.
  • the hydraulic control module assembly includes a main body formed from a reinforced thermoplastic material and a cover plate that can be formed from either metal or a reinforced thermoplastic material.
  • a thermoplastic main body that is optimized for injection molding processes results in lower cost due to the elimination of secondary processes such as machining that are required with a main body fabricated from metal, for example, aluminum.
  • the thermoplastic main body typically weighs 25% to 40% less than an aluminum part.
  • the geometry of thermoplastic designs can be modified to add stiffness where required, such as ribs in high stress areas.
  • the thermoplastic main body is inherently clean and free of debris since machining is not required to meet dimensional tolerances.
  • normal tool life for injection molded thermoplastic parts is about ten times the normal life of tools used for aluminum die-cast parts.
  • Figure 1 is a top schematic illustration of an on exemplary embodiment of a automatic transmission hydraulic control module assembly 10 that includes a main body 12 and a cover plate 14.
  • Main body 14 includes a bottom side 16 (first side) and a top side 18 (second side).
  • a plurality of fluid passage cavities 20 extend into bottom side 16 of main body 12.
  • At least one bore 22 is positioned in one of the fluid passage cavities 20 that extends through main body 12 from fluid passage cavity 20 and through top side 18. Bore 22 provides fluid communication path between fluid passage cavity 20 and top side 18 of main body 12.
  • Main body 12 is formed, for example, by injection molding, from a fiber reinforced thermoplastic material.
  • Cover plate 14 is coupled to bottom side 16 to seal fluid passage cavities 20 to form fluid passages.
  • a sealing gasket 24 is positioned between cover plate 14 and bottom side 16 of main body 12.
  • Cover plate 14 can be fabricated from metal, for example, aluminum, or from a fiber reinforced thermoplastic material. Typically, when cover plate 14 is fabricate from metal, cover plate 14 is coupled to main body 12 with fasteners, and sealing gasket 24 is used to create a seal between cover plate 14 and bottom side 16 of main body 12.
  • cover plate 14 is formed from a reinforced thermoplastic, and can be coupled to main body 12 by fasteners, vibration welding, sonic welding, laser welding, adhesive welding, and a snap fit.
  • main body 12 and cover plate 14 are integrally molded together as one piece. Coupling a thermoplastic cover plate 14 to main body 12 by fasteners or a snap-fit typically necessitates the use of sealing gasket 24. However, coupling a thermoplastic cover plate 14 to main body 12 by vibration welding, sonic welding, laser welding, and adhesive welding can eliminate sealing gasket 24. Further, gasket 24 can be molded into a thermoplastic cover plate 14 using, for example a two shot molding process, to eliminate a component from the assembly and ensure proper placement of the gasket when using fasteners or a snap-fit coupling method.
  • Suitable thermoplastic resins for use in molding main body 12 and cover plate 14 include, but are not limited to, polyamids, for example semi-crystalline polyamids, such as, nylon 66 and nylon 6 commercially available from General Electric Company, polyphenylene sulfides, polyphthalamides, polyethyl imides, and mixtures thereof.
  • the reinforcing fillers used to reinforce the thermoplastic resin can be in the form of particles and/or fibers.
  • Suitable fillers for use in reinforcing the thermoplastic resins include, but are not limited to metal fibers, metalized inorganic fibers, metalized synthetic fibers, glass fibers, graphite fibers, carbon fibers, ceramic fibers, mineral fibers, basalt fibers, inorganic fibers, aramid fibers, mineral fillers, and mixtures thereof.
  • Suitable, non-limiting, examples of mineral fillers include barytes, barium sulfate, asbestos, barite, diatomite, feldspar, gypsum, hormite, kaolin, mica, nepheline syenite, perlite, phyrophyllite, smectite, talc, vermiculite, zeolite, calcite, calcium carbonate, wollastonite, calcium metasilicate, clay, aluminum silicate, talc, magnesium aluminum silicate, hydrated alumina, hydrated aluminum oxide, silica, silicon dioxide, titanium dioxide, and mixtures thereof.
  • the thermoplastic material includes about 20% to about 80% by weight of reinforcing fillers, and in another embodiment from about 30% to about 55% by weight of reinforcing fillers.
  • automatic transmission hydraulic control module assembly 10 also includes a plurality of valves 30, for example solenoid valves, coupled to top side 20 of main body 12.
  • Each valves 30 is in fluid communication with one of the plurality of fluid passage cavities 20 through one of the plurality of bores 22.
  • thermoplastic main body 12 in alternate embodiments, include one or more strengthening ribs 32 inside of fluid passage cavities 20. Strengthening ribs 32 add stiffness to high stress areas of main body 12 for added strength. While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Control Of Transmission Device (AREA)

Abstract

L'invention concerne un module de contrôle hydraulique de transmission automatique (10), selon un mode de réalisation en exemple, qui comprend un corps principal (12) ayant un premier côté (16) et un second côté opposé (18). Le corps principal comprend une pluralité de cavités de passage de fluide au niveau du premier côté, et au moins un alésage s'étendant depuis une des cavités de passage de fluide à travers le corps principal et à travers le second côté. Le corps principal est constitué d'un matériau thermoplastique comprenant au moins une charge.
PCT/US2007/002478 2007-01-29 2007-01-29 Module thermoplastique de contrôle hydraulique de transmission automatique WO2008094142A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2007/002478 WO2008094142A1 (fr) 2007-01-29 2007-01-29 Module thermoplastique de contrôle hydraulique de transmission automatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2007/002478 WO2008094142A1 (fr) 2007-01-29 2007-01-29 Module thermoplastique de contrôle hydraulique de transmission automatique

Publications (1)

Publication Number Publication Date
WO2008094142A1 true WO2008094142A1 (fr) 2008-08-07

Family

ID=38544314

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/002478 WO2008094142A1 (fr) 2007-01-29 2007-01-29 Module thermoplastique de contrôle hydraulique de transmission automatique

Country Status (1)

Country Link
WO (1) WO2008094142A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797008A2 (fr) * 1996-03-18 1997-09-24 Eaton Corporation Ensemble collecteur pour electrovannes
DE19812052A1 (de) * 1998-03-19 1999-09-23 Zahnradfabrik Friedrichshafen Hydrauliksteuergerät für ein Automatgetriebe
JPH11311352A (ja) * 1998-04-28 1999-11-09 Suzuki Motor Corp 自動変速機のバルブボディ
JP2000346003A (ja) * 1999-06-01 2000-12-12 Honda Motor Co Ltd 油圧コントロールバルブユニット
EP1248020A2 (fr) * 2001-04-04 2002-10-09 Siemens Aktiengesellschaft Unité de commande de boite de vitesses et procédé de fabrication
DE10238517A1 (de) * 2002-08-21 2003-10-09 Ticona Gmbh Bauteile für Automatikgetriebe aus Kunststoff und Verfahren zu deren Herstellung
EP1724089A1 (fr) * 2005-05-19 2006-11-22 ElringKlinger AG Procédé de fabrication d'une pièce en résine plastique, moule et pièce en résine plastique selon ce procédé
US20070119043A1 (en) * 2005-11-29 2007-05-31 Russell Robert M Thermoplastic automatic transmission hydraulic control module

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797008A2 (fr) * 1996-03-18 1997-09-24 Eaton Corporation Ensemble collecteur pour electrovannes
DE19812052A1 (de) * 1998-03-19 1999-09-23 Zahnradfabrik Friedrichshafen Hydrauliksteuergerät für ein Automatgetriebe
JPH11311352A (ja) * 1998-04-28 1999-11-09 Suzuki Motor Corp 自動変速機のバルブボディ
JP2000346003A (ja) * 1999-06-01 2000-12-12 Honda Motor Co Ltd 油圧コントロールバルブユニット
EP1248020A2 (fr) * 2001-04-04 2002-10-09 Siemens Aktiengesellschaft Unité de commande de boite de vitesses et procédé de fabrication
DE10238517A1 (de) * 2002-08-21 2003-10-09 Ticona Gmbh Bauteile für Automatikgetriebe aus Kunststoff und Verfahren zu deren Herstellung
EP1724089A1 (fr) * 2005-05-19 2006-11-22 ElringKlinger AG Procédé de fabrication d'une pièce en résine plastique, moule et pièce en résine plastique selon ce procédé
US20070119043A1 (en) * 2005-11-29 2007-05-31 Russell Robert M Thermoplastic automatic transmission hydraulic control module

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