As one of the world’s leading suppliers of hydraulic brake systems, Continental offers solutions for traditional brake technology and optimally adjusted actuation systems. Our product portfolio ranges from disc brakes, parking brakes and drum brakes to brake hoses.
The hydraulic surge brake system is a totally trailer self contained braking system. It requires no interconnection of any mechanical or electrical components to the tow vehicle (other than the brake coupler itself) to provide totally automatic and proportional operation of the trailer brakes. Hydraulic surge brakes are most popular on boat and watercraft trailers. Sealed hydraulic systems deal better with immersion than electricity, and the normal trailer weight is determined more by the boat on it than by how much you load in it.
The term 'power hydraulic brakes' can also refer to systems operating on very different principles where an engine-driven pump maintains continual hydraulic pressure in a central accumulator. The driver's brake pedal simply controls a valve to bleed pressure into the brake units at the wheels, rather than actually creating the pressure in a master cylinder by depressing a piston. This form of brake is analogous to an system but with hydraulic fluid as the working medium rather than air. However, on an air brake air is vented from the system when the brakes are released and the reserve of compressed air must be replenished. On a power hydraulic brake system fluid at low pressure is returned from the brake units at the wheels to the engine-driven pump as the brakes are released, so the central pressure accumulator is almost instantly re-pressurised. This makes the power hydraulic system highly suitable for vehicles that must frequently stop and start (such as in cities). The continually circulating fluid also removes problems with freezing parts and collected water vapour that can afflict air systems in cold climates. The bus is a well-known application of power hydraulic brakes and the successive generations of cars with also used fully powered hydraulic brakes rather than conventional automotive brake systems.
The vacuum booster or is used in most modern hydraulic brake systems which contain four wheels. The vacuum booster is attached between the master cylinder and the brake pedal and multiplies the braking force applied by the driver. These units consist of a hollow housing with a movable rubber across the center, creating two chambers. When attached to the low-pressure portion of the throttle body or intake manifold of the engine, the pressure in both chambers of the unit is lowered. The equilibrium created by the low pressure in both chambers keeps the diaphragm from moving until the brake pedal is depressed. A return spring keeps the diaphragm in the starting position until the brake pedal is applied. When the brake pedal is applied, the movement opens an air valve which lets in atmospheric pressure air to one chamber of the booster. Since the pressure becomes higher in one chamber, the diaphragm moves toward the lower pressure chamber with a force created by the area of the diaphragm and the differential pressure. This force, in addition to the driver's foot force, pushes on the master cylinder piston. A relatively small diameter booster unit is required; for a very conservative 50% manifold vacuum, an assisting force of about 1500 N (200n) is produced by a 20 cm diaphragm with an area of 0.03 square meters. The diaphragm will stop moving when the forces on both sides of the chamber reach equilibrium. This can be caused by either the air valve closing (due to the pedal apply stopping) or if "run out" is reached. Run out occurs when the pressure in one chamber reaches atmospheric pressure and no additional force can be generated by the now stagnant differential pressure. After the run out point is reached, only the driver's foot force can be used to further apply the master cylinder piston.
Hydraulic Brake Assist Systems Kit/Hose Kit with Chrome Master Cylinder Chrome Proportioning Valve and Chromed Aluminum Accumulator Cover
Hydraulic Brake Assist Systems Standard Kit with Hose Kit