Development, Status and Future Trends for Hydraulic Brake Boosters

Hydraulic brake boosters will assume an increasingly important role, as the need for power assistance independent of the vehicle's engine increases. Also, the combination of other functions, such as Anti Skid Actuation, Self-Leveling Suspensions, can lead to overall cost effective systems. This paper covers the development background through duo-medium systems using steering pump as a power source to the latest single-medium high pressure H 21 system. The paper explains the compact integrated design of the unit and concludes by considering middle-to long-term brake system development which would include a greater use of electronics.