Trailer Stability Assist Control

Overview

The trailer stability assist control prevents the trailer from swaying, and helps stabilize the trailer while driving. The trailer stability assist control observes the vehicle speed using outputs from the wheel speed sensor, and also it monitors the trailer stability using outputs from the yaw rate-acceleration sensor and the steering angle sensor. Once these outputs exceed the specified values, the trailer stability assist control immediately starts controlling the engine speed and the braking forces on the tires via the VSA function to stabilize the trailer being towed.

Courtesy of HONDA, U.S.A., INC.

Receiving the yaw rate signal, the lateral and longitudinal G signals, the steering angle signal, and the vehicle speed signal, the trailer stability assist control detects oscillations of the vehicle caused by the swaying trailer. And then, by adjusting the brake pressure in the VSA system, the trailer stability assist control does the followings to stabilize the vehicle.

Decelerating the vehicle (Symmetric braking control + Engine control)
Restraining the oversteer (Controls listed above + Asymmetric braking control)