TY - THES

T1 - Development of a Simulation Method for the Evaluation of the Driving Dynamics of a Commercial Vehicle with Integrated E-Axle and Leaf Springs

AU - Bergmayr, Thomas

N1 - embargoed until 02-10-2024

PY - 2019

Y1 - 2019

N2 - Due to increasingly stricter emissions regulations AVL recently introduced a fully integrated electric axle optimized for urban delivery trucks. A key feature of this alternative powertrain concept is the high level of integration of the E-drive components like E-motor, inverter, transmission or cooling directly into the axle. This integration causes high unsprung mass. In addition the installation of the battery changes the position of the center of gravity compared to a conventionally powered truck. These modifications in the weight distribution and the location of the center of gravity have a strong impact on the vehicle dynamics. The aim of this master thesis is to outline a methodology for the evaluation of the driving dynamical behavior of a commercial vehicle by multibody simulation. Moreover this work should clarify the question how the electrification of the truck, with its consequences in the weight distribution affects the driving dynamics. A multibody simulation model was set up whereby one truck is conventionally and one is electrically powered. Subsequently, different standardized and most commonly used driving maneuvers for the in depth investigation of the vertical and lateral dynamics are considered. The results of these simulations of different powertrain concepts are compared to each other. In summary, it can be concluded that the comparison between the conventionally and the electrically driven truck indicates only slight deviations in driving dynamics, although the leaf springs have not been adjusted to the higher unsprung rear axle mass.

AB - Due to increasingly stricter emissions regulations AVL recently introduced a fully integrated electric axle optimized for urban delivery trucks. A key feature of this alternative powertrain concept is the high level of integration of the E-drive components like E-motor, inverter, transmission or cooling directly into the axle. This integration causes high unsprung mass. In addition the installation of the battery changes the position of the center of gravity compared to a conventionally powered truck. These modifications in the weight distribution and the location of the center of gravity have a strong impact on the vehicle dynamics. The aim of this master thesis is to outline a methodology for the evaluation of the driving dynamical behavior of a commercial vehicle by multibody simulation. Moreover this work should clarify the question how the electrification of the truck, with its consequences in the weight distribution affects the driving dynamics. A multibody simulation model was set up whereby one truck is conventionally and one is electrically powered. Subsequently, different standardized and most commonly used driving maneuvers for the in depth investigation of the vertical and lateral dynamics are considered. The results of these simulations of different powertrain concepts are compared to each other. In summary, it can be concluded that the comparison between the conventionally and the electrically driven truck indicates only slight deviations in driving dynamics, although the leaf springs have not been adjusted to the higher unsprung rear axle mass.

KW - Fahrdynamik

KW - LKW

KW - Nutzfahrzeuge

KW - Fahrwerkssimulation

KW - Blattfeder

KW - Elektrifizierung

KW - Simulation

KW - Suspension

KW - Driving Dynamics

KW - Truck

KW - Electrification

KW - Leaf Spring

M3 - Master's Thesis

ER -