Journal article

Publication year: 2022

Pages: 875-890

Journal: Engineering Research

Volume number: 86

Issue number: 4

ISSN: 0015-7899

eISSN: 1434-0860

Open access status: Hybrid

DOI Link: https://doi.org/10.1007/s10010-022-00600-3

Publisher: Springer

Abstract: 
The powertrain of electric vehicles differs significantly from vehicles with combustion engines. Current concepts in the field of electric vehicle powertrains usually have low friction and thus little damping due to the simple powertrain mechanics. Typically, there is no clutch to separate the inertial mass of the electric prime mover from the rest of the vehicle driveline. External (road unevenness, potholes, etc.) and internal excitations (torque changes of the electric machine, brake interventions) lead to torsional or jerking vibrations and sometimes high component loads. These can be reduced by suitable driveability functions. A common approach, known from conventional powertrains, consists of limiting the gradient and further modifications of the target torque or the driver's desired torque in order to influence the torque build-up of the prime mover and reduce the excitation of jerking vibrations. A second approach is the use of a pre-filter. The pre-filter used here is based on the inverse dynamics of the driveline to influence the target torque of the prime mover, but neglects the influences of the tyre, tyre-road contact and vehicle longitudinal dynamics. This has the advantage that observers and estimation procedures to determine the tyre-road contact etc. are not required. However, the effectiveness of the approach must be ensured for different road conditions. The pre-filter is complemented by an active anti-jerk control. In this article, the influence of varying road conditions on the effectiveness of the pre-filter applied here is realistically investigated. These investigations are necessary in order to be able to make a more reliable statement about the functionality of the developed control algorithms in real vehicles under varying road conditions. Comparable real or near-realistic investigations are only available in a limited number so far. For realistic vehicle conditions, driving manoeuvres are carried out on a hardware-in-the-loop test bench.

Harvard Citation style: Jakstas, G., Koch, A. and Falkenstein, J. (2022) Investigation of the influence of different road conditions on the drivability functions of electrified vehicle drive systems using a hardware-in-the-loop test bench, Engineering Research, 86(4), pp. 875-890. https://doi.org/10.1007/s10010-022-00600-3

APA Citation style: Jakstas, G., Koch, A., & Falkenstein, J. (2022). Investigation of the influence of different road conditions on the drivability functions of electrified vehicle drive systems using a hardware-in-the-loop test bench. Engineering Research. 86(4), 875-890. https://doi.org/10.1007/s10010-022-00600-3