Bosch says it covers all common braking maneuvers in everyday traffic.Ī motor within the iBooster controls the degree of brake boosting via a 2-stage gear unit for situation-dependent support on demand. The device recovers almost all the energy lost in typical braking by ensuring deceleration rates of up to 0.3 g are achieved using the electric motor, alone. It only draws electrical current during braking.īosch brake systems “will become independent of vacuum, and our customers will as well, because vacuum is less and less available in cars, even in modern gasoline cars,” Steiger says. Battery-electric vehicles create no natural vacuum at all.īosch’s solution is the iBooster, which operates electromechanically, does not require any vacuum from the engine and meets all future requirements of electric drives and driver-assistance systems. The traditional way to create more brake pressure was to generate a vacuum using intake air fed into an engine’s combustion chambers, or using an independent vacuum pump, which always consumes energy when running.īut direct fuel injection, fast becoming common on many new engines, reduces vacuum pressure, as do stop/start systems.
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Steiger says the first rollout comes from “one big German customer with lots of different brands.”Ĭomponent manufacturers in the braking business, including Bosch rivals TRW and Continental, have been working on electrically driven brake boosters for years. The German parts maker has development programs with “at least five major OEMs” interested in the technology, including those in the U.S., says Gerhard Steiger, president of Bosch’s chassis systems control division during an international press briefing at the company’s test track here. BOXBERG, Germany – Robert Bosch says it will start production this year of an electromechanical brake booster for three vehicle models for a European customer, and the supplier says it expects the system eventually will replace conventional vacuum-based boosters.