The automation and electrification of vehicles facilitates the development of novel chassis systems. With the introduction of x-by-wire systems, the mechanical separation of actuators from control elements allows for very compact chassis modules that combine propulsion, steering and braking, also known as corner modules. Different variants of these modules are developed, but so far they employ all one actuator for driving and another, separate actuator for steering. A novel concept has been invented with the objective of optimizing system performance and size. This concept involves the assignment of actuators to multiple tasks, allowing them to be used for driving and steering simultaneously. In this concept, two electrical actuators are arranged coaxially with the steering axis and are connected to each other in the center of the wheel via a bevel gear. This implies that driving can be achieved through the equal torque of both actuators acting in opposite directions, while steering can be realized by torque acting in the same direction. Furthermore, both load cases can also be superimposed. The maximum power of both actuators can thus be split up as desired between steering and driving. Therefore, the size of the actuators can be adapted to the maximum required system power. However, since the overall system behavior is not stable, it is essential to design a dedicated control system that is robust and reliable. This paper presents the theory and control algorithm of the novel corner module concept and offers the initial promising results of a 48 V powered prototype.
Conception and Prototypical Implementation of an Integral Steering and Drive Module
Proceedings
International Munich Chassis Symposium ; 2024 ; München, Germany June 04, 2024 - June 05, 2024
2025-05-24
20 pages
Article/Chapter (Book)
Electronic Resource
English
DRIVE STEERING MODULE, AND VEHICLE EQUIPPED WITH DRIVE STEERING MODULE
European Patent Office | 2015
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