Brake apply systems consist of boosters and master cylinders. The booster takes the mechanical input force from the brake pedal and amplifies it with engine vacuum. This force is then transmitted to the master cylinder. The master cylinder then converts the force into hydraulic brake fluid pressure. A reservoir is attached to the master cylinder to hold excess brake fluid. This fluid is needed by the system for controlled braking events and as brake lining wears which increases system volume.

The vacuum booster design is available in two configurations; conventional and tie rod. Optional dual rate boosters provide pedal force amplification at higher decelerations. Stringent noise, vibration, and harshness testing process have led to optimized internal airflow paths to create very quiet brake apply systems.

Versatile master cylinder designs support both inboard or outboard brake pipe connections. BWIGroup’s offers conventional, centerport compensating, and fixed seal type designs based on required fluid flow rate, cost, and packaging needs. The reservoir shapes and sizes can be custom designed for a unique fit.

With a large selection of master cylinder bore diameters, lengths, and a wide variety of both single and tandem boosters, BWIGroup brake apply family supports a diverse range of applications for small car to large trucks and SUVs.