Tribology of Electric Vehicles

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: 31 December 2024 | Viewed by 766

Special Issue Editors


E-Mail Website
Guest Editor
Tribology Research and Evaluations, Fuels and Lubricants Division, Southwest Research Institute, San Antonio, TX, USA
Interests: tribology; electric vehicles; EV fluids; rheology

E-Mail Website
Guest Editor
Tribology Research and Evaluations, Fuels and Lubricants Division, Southwest Research Institute, San Antonio, TX, USA
Interests: tribology; electric vehicles; EV fluids; rheology

Special Issue Information

Dear Colleagues,

The shift towards electrification in the automotive industry has presented new challenges in the field of lubrication. While the number of moving parts in a battery electric vehicle (BEV) has reduced significantly versus those in internal combustion engine (ICE) vehicles, the tribological concerns facing electric vehicles (EVs) reach beyond traditional ICE vehicles. BEVs are significantly heavier than ICE vehicles, placing more load on the wheel bearings and tires. In addition, the driveline fluids, historically made to protect gears from scuffing and pitting and provide traction characteristics for clutches, now have to operate at greatly increased rotational speeds, operate in an environment with stray electric currents, and in many cases act as a coolant in direct contact with the motor and inverter. They must also continue to protect the gears from pitting and scuffing. These challenging requirements have created a need for new base fluids and additives.

Traditional test methods for ICE fluids are not entirely suitable for understanding the behavior of EV fluids. Early research has shown that the presence of the electric field has an effect on material performance in terms of friction and wear. Fluid properties such as viscosity are also affected. This collection of manuscripts will present various approaches to studying EV fluid and grease properties. Test method development, analysis of initial findings, and thoughtful discussions will be presented.

Dr. Peter M. Lee
Dr. Carlos Sanchez
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tribology
  • electric vehicles
  • EV fluids
  • rheology

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

16 pages, 10786 KiB  
Article
Exploring the Boundaries of Electrically Induced Bearing Damage in Grease-Lubricated Rolling Contacts
by Jack R. Janik, Sudip Saha, Robert L. Jackson and German Mills
Lubricants 2024, 12(8), 268; https://doi.org/10.3390/lubricants12080268 - 28 Jul 2024
Viewed by 404
Abstract
As public attention is increasingly drawn toward more sustainable transportation methods, the popularity of electric vehicles (EVs) as part of the solution is rapidly expanding. Operating conditions within EVs can be severe compared to standard combustion powertrains, and the risk of electrical arcing [...] Read more.
As public attention is increasingly drawn toward more sustainable transportation methods, the popularity of electric vehicles (EVs) as part of the solution is rapidly expanding. Operating conditions within EVs can be severe compared to standard combustion powertrains, and the risk of electrical arcing across mechanical surfaces from electric leakage currents incites additional concern. This study employed a series of electro-tribological tests utilizing various moving patterns to improve understanding of the driving conditions for electrically induced bearing damage (EIBD). Rolling ball-on-disk tests were performed with different polyurea-thickened greases. Rotational tests were initially run at various speeds and test durations, but electrical damage was limited. However, electrical damage was unmistakable when a reciprocating motion was used at different track lengths and speeds. These results suggest that the conditions associated with the track length, such as the number of directional changes and speed-dependent film thickness, play a considerable role in forming electrical damage. This work provides critical insights into the mechanisms of EIBD in EVs and other electrical systems. It highlights the importance of understanding the operational conditions that contribute to EIBD, which can lead to improved designs and maintenance practices, ultimately enhancing the efficiency and lifespan of these systems. Full article
(This article belongs to the Special Issue Tribology of Electric Vehicles)
Show Figures

Graphical abstract

Back to TopTop