The brake vacuum pump is powered by the Vacuum Brake Booster System.
Gasoline engines can generate high vacuum pressure in the intake manifold, while vacuum pumps are required in diesel engines and gasoline direct injection engines to provide a vacuum source to meet the requirements of vacuum-assisted braking systems.
Brake vacuum pumps are Vacuum Brake Booster Kits for automotive brake boost systems. They are generally divided into mechanical pumps, electronic vacuum pumps, electronic vacuum pumps, and piston pumps and plate pumps. Most of the passenger cars on the market today use electronic vacuum pumps to reduce energy consumption.
Vacuum Brake Booster System
The brake assist vacuum pump utilizes the principle of inhaling air when the engine is working, causing one side of the booster to be vacuumed, and a pressure difference is generated with respect to the normal air pressure on the other side, and the pressure difference is used to strengthen the brake thrust. Even if there is only a small pressure difference on both sides of the diaphragm, due to the large area of the diaphragm, a large thrust can be generated to push the diaphragm to move toward the end of the pressure.
The brake vacuum pump is mainly composed of a pump body, a rotor, a blade, and intake and exhaust port. For example, a single-blade vacuum pump is used. When the driving torque is passed through the engine camshaft and the vacuum pump connector, the rotor is rotated to drive the single blade of the plastic along the contour of the vacuum pump chamber is rotated by the eccentric position of the cavity. The upper side of the single blade is divided into two chambers, and the left side is a vacuum chamber. As the single blade rotates, the volume of the chamber becomes larger and larger. The vacuum is generated at the same time and the vacuum booster is increased in vacuum by the air inlet connected to the vacuum booster and having a one-way valve, and the right chamber is a compression chamber, and the volume of the chamber is increased with the rotation of the single blade. Small, compressing the lubricating oil and the air extracted from the vacuum booster to the engine. Lubricating oil from the engine enters the center of the rotor to lubricate the vacuum pump chamber and corresponding components and acts as a seal between the floating terminals on the single vane and the contour of the chamber.
The main types of vacuum pumps used in the brake boost vacuum system in the automotive field are the following: single-blade vacuum pump, plunger vacuum pump, and multi-blade vacuum pump, among which single-blade vacuum pumps and multi-blade vacuum pump are used more. The main driving forms of these three vacuum pumps are as follows:
The single-blade vacuum pump is typically driven by an engine camshaft. The driving form of the plunger-type vacuum pump is generally a cam drive. Multi-blade vacuum pumps are typically driven by belts, generators, gears and motors.
Among the main application types of brake vacuum pumps, single-blade vacuum pumps are the most widely used because single-blade vacuum pumps have their irreplaceable advantages: based on high-efficiency design; lower engine power consumption, which is of great significance for energy saving; More efficient vacuum performance, higher durability, lower lubricant flow, lighter weight and fewer parts, lower vibration and noise in the temperature range.
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