Development of Lifetime Testing Methods for Increased Requirements of Coolant Pumps in Electrical Vehicles

Angéla Váradiné Szarka, Sándor Tollár, Sándor Fegyverneki

Abstract

Increasing market of electrical cars pushes part suppliers to fulfil new requirements and meet new challenges. This paper focuses to the increased lifetime requirements of parts in electrical vehicles. Component developers and suppliers are facing to difficulties of lifetime testing, as the increased periods are too long for practical tests. New accelerated endurance testing and mathematical estimation methods are required for reliable lifetime estimation. Research team of the University of Miskolc works on development of new lifetime estimation method for bush bearings of coolant pumps in electrical vehicles in cooperation with its industrial partners. Lifetime requirement for these parts is increased to 30.000 hours which makes no possible the traditional endurance testing at all. In the paper acceleration parameters and endurance test stands developed for defining practical abrasion curves are summarized. Mathematical model of lifetime estimation and two new methods for accelerated lifetime testing for industrial use are described.

Keywords

Lifetime test, bush bearing, electrical vehicle, endurance test

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IMEKO-TC10-2020-038.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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