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An Iterative Method to Determine Clutch Clearances in Torque Converters by Integrating the Fluid and Structure Analyses

Valeo Group-Zane Yang, Subramanian Jeyabalan
Valeo India Pvt., Ltd.-Abdur-Rasik Khajamohideen, Maheshkannan Solaimalai, Dhashnakumar Rajendhran
  • Technical Paper
  • 2020-01-0936
To be published on 2020-04-14 by SAE International in United States
Determining an amount of clutch clearance for the lockup device in a torque converter is important for its being operating precisely in the intended mode. Challenges may exist for the torque converters whose nominal clearances are on purpose very small. Any potential changes in the clutch lockup system (e.g., due to the deformation of components) may make such a small clearance instantaneously diminish during the mode of open-clutch, thus leading to unwanted drag in the clutch and unnecessary loss of energy. In the open-clutch mode, the actual clutch clearance may be different from the nominal clearance anticipated, primarily because of deformation caused by the internal load acting on clutch members. It has been found that the pressure distribution in a clutch chamber also depends on the very clutch gap through which the fluid flows. This interdependence between the fluid pressure load and structural deformation is typical of two-way coupling in simulation. As an alternative approach, a simple iterative computation method is studied here to address this problem with some intuitive results. The effectiveness will be…
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Q&A

SAE Truck & Off-Highway Engineering: February 2020

  • Magazine Article
  • 20TOFHP02_14
Published 2020-02-01 by SAE International in United States

Off-highway industrial machines require multi-function implement operation with dynamic duty cycles. In many cases, machine implements demand short bursts of full engine power and brake dynamic loads requiring 50% or more of energy consumed. Many next-generation machines reduce energy loss and improve productivity by incorporating hybrid-electric approaches with energy storage. An efficient implement solution enabling the hybrid-electric approach is essential to achieve maximum improvement potential.

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O-Ring Molded from AMS7267 Material

A-6C2 Seals Committee
  • Aerospace Standard
  • AS9386A
  • Current
Published 2020-01-09 by SAE International in United States
This standard establishes the dimensional and visual quality requirements, lot requirements, and packaging and labeling requirements for O-rings molded from AMS7267 rubber. It shall be used for procurement purposes.
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O-Ring Molded from AMS7274 Material

A-6C2 Seals Committee
  • Aerospace Standard
  • AS3570A
  • Current
Published 2020-01-09 by SAE International in United States
This standard establishes the dimensional and visual quality requirements, lot requirements, and packaging and labeling requirements for O-rings molded from AMS7274 rubber. It shall be used for procurement purposes.
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Rubber: Acrylonitrile-Butadiene Rubber (NBR) Fuel and Low Temperature Resistant 60 - 70 Type “A” Hardness For Seals in Fuel Systems

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS7271K
  • Current
Published 2019-12-03 by SAE International in United States
This specification covers an acrylonitrile-butadiene rubber in the form of molded rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications.
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Recommended Practices for Hydraulic Hose Assemblies

Hydraulic Hose and Hose Fittings Committee
  • Ground Vehicle Standard
  • J1273_201910
  • Current
Published 2019-10-31 by SAE International in United States
SAE J1273 provides guidelines for selection, routing, fabrication, installation, replacement, maintenance, and storage of hose and hose assemblies for hydraulic fluid-power systems. Many of these SAE Recommended Practices also may be suitable for other hoses and systems.
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Rubber: Methyl Vinyl Silicone (MVQ) High Temperature Resistant, Low Compression Set 65 - 75 Type “A” Hardness For Seals in a Static Application - Resistant to 500 °F (260 °C)

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS7264B
  • Current
Published 2019-10-16 by SAE International in United States
This specification covers a Methyl Vinyl Silicone (MVQ) rubber in the form of molded rings for aeronautical and aerospace applications. For sheet, strip, tubing, extrusions, and molded shapes it is the responsibility of the user to determine suitability.
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Filter and Filter Element for Hydraulic System(s) Used on Manufacturing and Assembly Equipment

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2066_201910
  • Current
Published 2019-10-02 by SAE International in United States
This SAE Standard establishes a common specification and ordering code for hydraulic filter assemblies and hydraulic filter elements, and establishes minimum performance criteria and test methods. This document establishes two filter diameter sizes, five basic micron ratings, and two basic collapse ratings. These classifications will satisfy most hydraulic filter applications, and thereby can minimize inventory requirements for hydraulic filter elements.
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SEAL, BONDED, ALUMINIM ALLOY 6061-T6, AMS4027, MOLD IN GROOVE, NBR RUBBER, AMS-R-7362

A-6C2 Seals Committee
  • Aerospace Standard
  • AS27195B
  • Current
Published 2019-09-03 by SAE International in United States
No Abstract Available.
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SEAL, BONDED, 302 CORROSION RESISTANT STEEL, AMS5516, MOLD IN GROOVE, FLUOROSILICONE RUBBER, MIL-DTL-25988

A-6C2 Seals Committee
  • Aerospace Standard
  • AS27198C
  • Current
Published 2019-09-03 by SAE International in United States
No Abstract Available.
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