
Power brake systems include three types: air brake systems, air-over-hydraulic brake systems, and full hydraulic power brake systems. Below is a related introduction to power brake systems: 1. Air brake system: The energy supply and transmission devices of an air brake system are entirely pneumatic, with its control devices mainly consisting of brake pedal mechanisms and pneumatic control components such as brake valves. 2. Air-over-hydraulic brake system: The energy supply and control devices of an air-over-hydraulic brake system are the same as those of an air brake system, but its transmission devices include both pneumatic and hydraulic parts. 3. Full hydraulic power brake system: In a full hydraulic power brake system, except for the brake pedal mechanism, all energy supply, control, and transmission devices are hydraulic.

The power braking system mainly includes three common types. The first is the air brake system, commonly known as the air brake, which is generally used in trucks or large vehicles because compressed air can provide stronger braking force. When the driver steps on the brake, the sound of air pressure being released can be heard, giving a sense of operation. The second is the hydraulic brake system, which is commonly used in ordinary family cars. It transmits force through brake fluid, offering sensitive response and smooth braking. However, it can be troublesome if the brake fluid leaks or air gets in. The third is the vacuum-assisted brake system, which adds a vacuum pump to the hydraulic brake system. A light press can generate strong force, making long-distance driving less tiring for the feet. Each of these three systems has its own advantages, and when choosing a car, the suitability of the braking type can be considered based on actual driving needs.

Let's talk about the three main types of power braking systems. Air brakes are particularly practical for large vehicles, such as construction vehicles and trucks. They rely on an air compressor to pressurize air into storage tanks, and when the brake pedal is pressed, compressed air is released to push the brake pads. Hydraulic brakes are most common in passenger cars, where the brake pedal pushes brake fluid, evenly transmitting force to all four wheels. Vacuum-assisted brakes are a more advanced design, utilizing the negative pressure generated by the engine to assist braking, providing strong braking with just a light touch. Different vehicle types correspond to different braking methods. Experienced drivers often emphasize the importance of regular maintenance for braking systems, especially for air brake vehicles, which require frequent draining of condensation, and hydraulic systems, where checking for oil leaks in the pipes is crucial.

The power braking system is divided into three types of designs. Pneumatic braking is commonly used in commercial vehicles, where a compressor forces air into the air reservoir, and when the brake is pressed, a valve opens to allow compressed air to push the brake chamber. Hydraulic braking is typical in passenger cars; pressing the pedal pushes brake fluid from the master cylinder, and the hydraulic pressure is transmitted to the wheel cylinders to squeeze the brake pads. Vacuum-assisted braking adds a vacuum booster to the hydraulic system, utilizing the engine's intake vacuum to reduce effort. Each of these has its applicable scenarios: large trucks use air brakes for greater reliability, passenger cars use hydraulic systems for lower manufacturing costs, and vehicles with turbochargers benefit most from vacuum-assisted braking.


