Abstract
Because of the long air brake pipeline of commercial vehicles as like tractor semi-trailer, there will be a bigger delay from the brake pedal to the actual force applied for the wheels on each axle, which will result in brake time difference and instability among the different axle wheels. In this paper, the model of the tractor semi-trailer and Electro-Air pressure brake system are built, and the brake stability in longitudinal and lateral motion are simulated. According to the study and design of the Electro-Air pressure brake system, the pressure brake system response time and stop distance is shorten. The brake force distribution strategy is studied and recommended to improve the tractor semi-trailer vehicle longitudinal and lateral stability.
KEYWORDS – brake, stability, tractor, trailer, simulation