Which component assists in the monitoring of pressure in the air-assist steering system?

In an air-assist steering system, the most relevant component for monitoring pressure is the torque valve. The torque valve plays a critical role in the steering system by sensing the driver's input through the steering wheel and adjusting the assist accordingly. This allows for a smoother steering experience while ensuring that the necessary pressure in the system is maintained for effective operation.

The torque valve detects the amount of torque being applied to the steering wheel and automatically regulates the assistance provided by the air-assist system, based on the pressure required to turn the vehicle. This ensures that steering effort is optimized, enhancing both comfort and control. By adjusting the pressure in response to the driver's actions, the torque valve contributes significantly to steering performance and responsiveness.

While other components like the power valve, control rack, and piston assembly play important roles in the functionality of the steering system, they do not have the specific job of monitoring and adjusting pressure based on steering input in the same manner that the torque valve does. The power valve primarily aids in directing fluid flow rather than pressure monitoring, while the control rack and piston assembly are more about converting input motion to steering movement rather than actively managing system pressure.