1. Core Functions
·The core role of the Brake Booster is "force amplification". It amplifies the force exerted by the driver on the brake pedal through physical or electronic means to ensure the braking system operates quickly and effectively. Specifically, it can be broken down into three points:
2.Amplifying pedal pressure·When the driver presses the brake pedal, the force applied is usually only a few dozen newtons. However, the brake calipers (or brake shoes) require several hundred to several thousand newtons of force to clamp the brake discs (or brake drums) and achieve deceleration. The Brake Booster amplifies the pedal force by 5 to 10 times using vacuum (commonly used in fuel-powered vehicles, leveraging the vacuum pressure from the engine's intake manifold) or hydraulic pressure/electric motors (commonly used in new energy vehicles, such as the Electronic Brake Booster, EBOOSTER), bridging the force gap between "human effort" and "braking requirements".
3.Synchronously transmitting braking signals·The boosting process does not delay or deviate from the driver's operational intent. When the driver presses the pedal, the booster synchronously transmits the "amplified force" to the master brake cylinder, which then transfers it to the brake wheel cylinders of each wheel via brake fluid. This ensures immediate linkage between "pressing the pedal" and "braking action", preventing braking delays caused by booster lag.
4.Ensuring basic braking capability in case of failure
·It is designed with "failure redundancy": if the vacuum boosting system (in fuel-powered vehicles) or electronic boosting system (in new energy vehicles) malfunctions, the booster will not completely block the braking path. The driver can still push the master brake cylinder to work by applying greater force (e.g., using leg strength to press the pedal), maintaining basic braking capability (though the brake pedal will feel stiffer and the braking distance will increase, it avoids the danger of complete brake failure).
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