What is the purpose of the metering valve in a brake system?

The metering valve plays a crucial role in the brake system by delaying hydraulic pressure to the front brakes. This function is essential for ensuring that the rear brakes engage slightly before the front brakes during braking applications, which helps maintain vehicle stability and control. By delaying the pressure to the front, the metering valve allows for a more gradual and balanced application of brakes, preventing the risk of the rear wheels locking up too early, which can lead to a loss of control.

This functionality is particularly important in vehicles with disc brakes in the front and drum brakes in the rear, as they have different response characteristics. The metering valve helps optimize braking performance by ensuring that the front and rear brakes work harmoniously together, improving overall safety and efficiency during stops.