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Home >> Honda >> 2009 >> S2000 Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> VSA (Vehicle Stability Assist) System Components >> System Description >> VSA Modulator-control Unit Inputs and Outputs for 47P Connector (Connector Disconnected) >> ABS Features

ABS Features

Without ABS, when the brake pedal is pressed while driving, the wheels sometimes lock before the vehicle comes to a stop. In such an event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is reduced if the rear wheels are locked, creating an extremely unstable condition. With ABS, the system precisely controls the slip rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures maneuverability and stability of the vehicle.

The ABS calculates the slip rate of the wheels based on the four wheel speeds, and then it controls the brake fluid pressure to reach the target slip rate.

Grip force of tire and road surface 

Fig 1: Grip Force Graph
G06232128Courtesy of AMERICAN HONDA MOTOR CO., INC.