What does roll stability control do when a rollover is imminent?

What does roll stability control do when a rollover is imminent?

• A. Increases engine torque to prevent rollover.
• B. The system slows the vehicle by reducing engine torque, then uses engine braking and may apply the service brakes.
• C. Disables ABS.
• D. Only sounds an alarm.

Answer: (B)

Roll stability control helps prevent rollover by dampening the forces that cause a vehicle to tip. When the system senses an imminent rollover, it reduces engine torque to slow the vehicle and lower lateral acceleration. It may use engine braking and can apply the service brakes on individual wheels to create a stabilizing yaw or counteract the tipping tendency. This combination directly changes the vehicle’s motion to keep it from tipping, rather than just alerting the driver or disabling systems. Increasing torque would do the opposite, and simply sounding an alarm or disabling ABS wouldn’t correct the dynamic instability.

Roll stability control helps prevent rollover by dampening the forces that cause a vehicle to tip. When the system senses an imminent rollover, it reduces engine torque to slow the vehicle and lower lateral acceleration. It may use engine braking and can apply the service brakes on individual wheels to create a stabilizing yaw or counteract the tipping tendency. This combination directly changes the vehicle’s motion to keep it from tipping, rather than just alerting the driver or disabling systems. Increasing torque would do the opposite, and simply sounding an alarm or disabling ABS wouldn’t correct the dynamic instability.