Design of Sliding Frame System for Two-Wheeled Vehicle

Abstract

The article deals with the initial design of a system for changing the adhesive force of two-wheeled vehicles. The system is designed for light off-road motorcycle KTM 250 SX-F. The purpose of the system is to allow the adhesive force transmitted between the motorcycle wheels and the road to be changed. The system allows the motorcycle rider to move the motorcycle at the stability limit at ‘safe’ speed. Both from the forward and especially the transverse direction. It also prevents damage to the rider’s health and motorcycle if the limit value is exceeded. The system is designed as two hydraulically operated frames, one for the front and the other for the rear motorcycle wheel. The change in adhesive force is controlled by reducing the radial response transmitted by the motorcycle wheels. Depending on the desired situation, it is possible to simulate a reduction in adhesion by any value independently for the front or rear wheels or together for both wheels. A pair of drop frames comes into operation in the event of exceeding the limit state of the motorcycle in terms of transverse stability. They are individually placed on the sides of the motorcycle. The use of the system is for the purpose of enhancing the skills of the rider for the purpose of becoming accustomed to the motorcycle. The rider will check the limit of the motorcycle without harmful consequences and thus gain important experience for safe movement on the road. In this way, it is possible to increase road safety indirectly. The paper aims to implement an initial design of a system enabling to change the adhesive conditions of a motorcycle so that when driving on an asphalt surface, it would allow simulating driving on a surface with reduced adhesion, such as wet asphalt.