The Hydroboost power brake booster uses hydraulic pressure from the power steering pump to assist in generating extra braking force when the brakes are applied. This is done by using a series of valves, check valves and other components to control the flow of fluid through the system. The most important valve used in this system is a three-way solenoid valve that opens and closes depending on how hard you press down on the brake pedal. When you step on your brakes, this valve opens allowing for more pressure being sent through the system which gives your stopping power a boost. Additionally, there are two check valves included in order to ensure that any excess pressure does not back up into either side of the cylinder or return line where it could cause damage to both systems. All these components work together with one another so that they can provide both accurate functioning as well as reliable performance while driving at all times.