| ACCELERATED LIFE TESTING OF A MILD HYBRID POWERTRAIN USING ARRHENIUS EQUATION
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| Habib Kaymaz |
| Mercedes Benz Turk AS |
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| ABSTRACT |
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Electrification of city buses, which play a major role in public transportation, is imperative for efficient use of
limited resources and reducing adverse effects of fossil fuels on the environment. One of the vital processes in electrification
projects in the automotive industry is testing. The main target of testing is to achieve a reliable and reproducible test that
simulates real-world driving conditions to disclosure any weakness of the product at the early stage of the life cycle. Other
side targets of testing are to achieve the main target with low cost and environmentally friendly testing. In this study, results
of research and development in accelerated life test stand for a mild hybrid system is described. The realized test stand serves
to product reliability by enabling life tests with in excess of its normal service parameters real-world driving conditions such
as revolution, electrical power, high ambient temperature, cooling effect, and rest-bus CAN simulation. By using temperature
as a stress factor for the mild hybrid powertrain under test, life test duration was shortened 4.65 times according to the
Arrhenius equation. Thanks to the realized test stand, the mild hybrid life test was achieved by decreasing time and cost. |
| Key Words:
Electrification of buses, Hybrid electric powertrain, Accelerated life test, Arrhenius equation
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Corresponding Author.
Habib Kaymaz , Email. 
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