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Standard

Road User Charging™ Set

2024-01-25
CURRENT
J3217/RS_202401
This Abstract Syntax Notation (ASN.1) file precisely specifies the structure of the data used to support implementation of SAE International Standard J3217/R. Using the ASN.1 specification, a compiler tool can be used to produce encodings as required by the encoding rules identified in the standard (SAE J3217/R messages are encoded with UPER encoding). Both this file and the SAE J2735 ASN.1 files are necessary to collectively implement the data exchanges described in SAE J3217/R. The combined library can be used by any application (along with the additional logic of that application) to exchange the data using interfaces conformant to J3217/R. SAE J3217/R specifies interface requirements and message exchanges for configuration and reporting in road use charging systems.
Technical Paper

The Influence of Torsional Vibrations on the Longevity of Manual Transmission Synchronizers and the Durability of Clutch Dampers

2024-01-25
2024-01-5010
This study delves into the impact of engine torsional vibration on transmission component failures, specifically synchronizers and clutch damper springs. Synchronizers are crucial in ensuring smooth gear shifts by synchronizing the rotational speeds of the transmission input and output shafts. While design factors such as geometry, friction material, and lubrication are often attributed to synchronizer failures, engine-generated torsional vibrations significantly affect their lifespan. Clutch damper mechanisms integrated into the clutch disc are designed to mitigate these vibrations. This research employs 1D powertrain simulation modeling to predict powertrain torsional vibration behavior. Additionally, rig tests are conducted to simulate vehicle-level angular accelerations and examine the impact of torsional vibrations on synchronizer life.
Journal Article

Experimental Assessment of Different Air-Based Battery Thermal Management System for Lithium-Ion Battery Pack

2024-01-25
Abstract Lithium-ion (LI) batteries are widely used to power electric vehicles (EVs), owing to their high charge density, to minimize the environmental pollution caused by fossil fuel-based engines. It experiences an enormous amount of heat generation during charging and discharging cycles, which results in higher operating temperatures and thermal nonuniformity. This affects performance, useful battery life, and operating costs. This can be mitigated by an effective battery thermal management system (BTMS) to dissipate the heat there by safeguarding the battery from adverse thermal effects and ensuring high performance, safety, and longevity of the battery.
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