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Synchros, General Specification For

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708C
  • Current
Published 2019-06-05 by SAE International in United States
This specification relates to Synchros, 60 and 400 Hz. It is not complete in itself, but shall be used in conjunction with MIL DTL-81963, in which the latter shall be recognized as forming an inherent part of this specification. This standard requires a Qualified Products List (see 6.4).
 

Counterfeit Electrical, Electronic, and Electromechanical (EEE) Parts; Avoidance, Detection, Mitigation, and Disposition

G-19CI Continuous Improvement
  • Aerospace Standard
  • AS5553C
  • Current
Published 2019-03-26 by SAE International in United States
This standard is for use by organizations that procure and/or integrate and/or repair EEE parts and/or assemblies containing such items, including maintenance, repair, and overhaul (MRO) organizations. The requirements of this standard are generic and intended to be applied/flowed down, as applicable, through the supply chain, to all organizations that procure EEE parts and/or assemblies, regardless of type, size, and product provided. The mitigation of counterfeit EEE parts in this standard is risk-based, and these mitigation steps will vary depending on the criticality of the application, desired performance, and reliability of the equipment/hardware. The requirements of this document are intended to be used in conjunction with a higher-level quality standard (e.g., AS/EN/JISQ9100, ISO-9001, ANSI/ASQC E4, ASME NQA-1, AS9120, AS9003, and ISO/TS 16949 or equivalent) and other quality management system documents. They are not intended to stand alone, supersede, or cancel requirements found in other quality management system documents, requirements imposed by contracting authorities, or applicable laws and regulations unless an authorized exemption/variance has been obtained. This document is not intended to make a legal determination…
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Gearshift Quality Sensitivity Analysis

Tata Motors, Ltd.-Hiral Patel, Vishveshvar Tendulkar, Himanshi Baid, Vikas Bhosale, Gururaj Bhavikatti
Published 2019-01-09 by SAE International in United States
Gearshift quality is a perceived quality parameter. Hence, is getting much importance because of the increased awareness about comfortable and refined driving experience, especially in the case of passenger cars. When the topic of gearshift feeling is broached in manual transmission vehicles, synchronizer pack (shifter sleeve, engaging gear, strut, synchronizer and gear synchro ring assembly) have been the focus point for optimization. Synchronizer type (single, double or triple cone), lining material, datch chamfer angle of shifter sleeve/synchro ring of gear/synchronizer, all of these have been extensively studied in the past to improve the gearshift quality. With stringent timelines for vehicle development, OEMs prefer to use off-the-shelf powertrain systems developed by powertrain manufacturers. Due to this, avenues to refine gearshift feel gets reduced to a large extent and hence refinement becomes difficult. The scope of this paper is to discuss gearshift quality parameters used to assess the gearshift feel of a vehicle. It primarily examines ways to refine the gearshift quality by optimizing the external gearshift mechanism and other powertrain aggregates. It also extends to a…
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SCREW, EXTERNALLY RELIEVED BODY, (SYNCHRO), CRES (UNS S30200 OR UNS S30300)

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS17184C
  • Current
Published 2018-11-21 by SAE International in United States
No Abstract Available.
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Torsional Fluctuations Consideration while Design of Synchro Rings

Tata Motors, Ltd.-Dhananjay Aswale, Makarand Ponkshe
Tata Technologies, Ltd.-Nitin Tawhare
Published 2018-09-10 by SAE International in United States
In today’s manual transmissions of car, gearshift system requires high performance with particular emphasis on low effort, minimal travel and positive feel. To meet these targets, a high capacity multi cone synchronizers along with higher co-efficient of friction material used for lower gears. The design of synchronizer with these specifications is influenced by torsional fluctuations from engine.Excessive torsional vibrations leads to wobbling of synchro rings within the peripheral clearances with surrounding parts. Wobbling leads to abrasion wear of frictional area of synchro ring causing grating or crashing noise of gears during shifting.This paper presents the optimization of the multiple cone synchronizer design exposed to excessive torsional vibrations and validation of the same on test bench during development stage instead vehicle level validation.
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Synchro, Control Transformer, Type 16CTB4B

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708/25B
  • Current
Published 2017-10-30 by SAE International in United States
This specification covers the detail requirements for control transformer synchro, type 16CTB4b, 90 volt, 400 cycle.
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Synchro, Control Transformer, Type 19CTB4B

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708/39C
  • Current
Published 2017-10-30 by SAE International in United States
This specification covers the detail requirements for control transformer synchro, type 19CTB4b, 90 volt, 400 cycle.
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Synchro, Control Differential Transmitter, Type 15CDX4D

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708/16B
  • Current
Published 2017-10-30 by SAE International in United States
No Abstract Available.
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Synchro, Control Differential Transmitter, Type 15CDX6C

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708/22B
  • Current
Published 2017-10-30 by SAE International in United States
No Abstract Available.
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Synchro, Control Transformer, Type 26V-11CT4D

AE-7A Generators and Controls Motors and Magnetic Devices
  • Aerospace Standard
  • AS20708/7B
  • Current
Published 2017-10-30 by SAE International in United States
No Abstract Available.
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