Brake boosters allow for a reduction in the pedal force that the driver must apply in order to achieve a desired braking effect. The vacuum brake boosters stand out by virtue of their low weight and optimized braking power.
less weight contributes to lower fuel consumption and CO2 emissions.
and reduced pedal travel
A brake booster has two chambers, which are separated by a moving membrane. To amplify the driver's pedal force, a pressure difference is created between both chambers of the brake booster. To do this, the brake booster is evacuated in a non-activated state. When the driver actuates the brake pedal, ambient air flows into the rear chamber, creating higher pressure in front of the membrane. Such a pressure difference is created between both of the chambers that the diaphragm plate presses in the direction of the tandem master cylinder and thus supports the force of the driver's foot.
For larger vehicles, tandem vacuum brake boosters with four chambers are used. In addition to the standard variant, Bosch also offers Tie Rod variants of the vacuum brake booster. In these, the stiffness is increased by so-called tie rods and the thickness of the shells is reduced at the same time. The Tie Rod variants are available in steel or aluminum.
The variant of the vacuum brake booster with innovative Tie Rod technology stands out by virtue of its low weight and optimized braking power (steel variant up to 20 percent lighter than conventional vacuum brake boosters). The aluminum variant reduces weight by an additional 20 to 25 percent. The aluminum brake booster thus contributes to lower fuel consumption and CO₂ emissions.
The high rigidity of the vacuum brake booster shortens the brake pedal travel in maximum braking situations, thereby enhancing safety and comfort. The vacuum brake booster is available as a single version (scalable from 9˝ to 11˝) or as a tandem version (scalable from 8 + 8˝ to 10 + 10˝). The brake booster is therefore suitable for use in different vehicle types – from small cars to light commercial vehicles.
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