The main difference between car brake pumps is their working principle, location and function. Brake pumps mainly include two types: vacuum pumps and hydraulic pumps, which play different roles in the car brake system.
Difference between vacuum pumps and hydraulic pumps
Working principle:
Vacuum pump: A type of mechanical pump responsible for providing vacuum power to the car brakes. It is usually used in light vehicles, buses, pickup trucks and other vehicles. The vacuum pump sucks gas from the cylinder through the engine, transmits power to the vacuum pump through the crankshaft angle, and then the vacuum pump forms a vacuum negative pressure to drive the brake.
Hydraulic pump: Also known as the brake master cylinder, it is a hydraulic pump that works on the hydraulic principle. It does not require vacuum, and directly converts the force of the driver's brake pedal into hydraulic pressure through the hydraulic principle, pushing the brake fluid pressure to the brake, thereby driving the brake.
Location:
Vacuum pump: Usually installed above or on the side of the engine, you can see a bucket-like object, which also has a pipe connected to the brake master cylinder.
Hydraulic pump: Generally located in the cab or engine compartment, connected to the brake master cylinder through a plastic pipe assembly.
Function:
Vacuum pump: Mainly provides vacuum power to help the brake system work.
Hydraulic pump: Converts the driver's brake pedal force into hydraulic pressure through the hydraulic principle, pushes the brake fluid to the brake, and achieves braking.
The role of vacuum pumps and hydraulic pumps in automobile braking systems
Vacuum pump: When the engine is running, it forms a vacuum negative pressure by sucking in gas to help the brake system work. It depends on the running state of the engine to provide vacuum power.
Hydraulic pump: Directly converts the driver's brake pedal force into hydraulic pressure through the hydraulic principle, pushes the brake fluid to the brake, and achieves braking. It is the core part of the braking system, responsible for converting the driver's force into hydraulic pressure and transmitting it to each sub-pump.
