Is there any braking force when the electric car is running?

The air compressor is driven by the engine. Therefore, when the engine is turned off, the air compressor will not work, and the air compressor will also stop working, resulting in the vacuum booster not working.

Common electric vehicles generally include pure electric vehicles and hybrid electric vehicles. For pure electric vehicles, because there is no engine, there is no case that the engine drives the air compressor.

For hybrid electric vehicles, it is impossible for the engine to drive the air compressor to generate electricity because the engine is not working in many cases. So ... what exactly is the braking system in electric vehicles?

At present, there are two kinds of braking systems for electric vehicles: electronic vacuum booster system and electronic braking system. Although the two systems only differ in name by the word "vacuum assisted", their structures and principles are completely different.

Let's talk about the electronically controlled vacuum booster system first. As the name implies, the vacuum degree of its vacuum booster is not produced by the air compressor driven by the engine, but by the electric vacuum pump. But other parts, like the traditional fuel truck, still use hydraulic braking, so there are still parts such as the sub-pump and the master cylinder.

Extended data:

In fact, for automobiles, it is necessary to install an independent vacuum plan, which can solve the problem that the vacuum source cannot be provided due to engine shutdown. As an independent automobile part, the electric vacuum pump assembly exists in the whole vehicle, and it can work independently only with the power supply of 12V battery, providing a reliable vacuum source for the vacuum booster.

Wherein, a controller is arranged in the pressure delay switch. In other words, the movement of the electric vacuum pump is also controlled by the controller.

Let's talk about the electronic braking system first. The electronically controlled braking system is completely different from the traditional braking system. It is based on this year's research on the vehicle by-wire system, and EMB electromechanical braking is the application of the by-wire system in braking.

Simply put, the biggest feature of electronic control braking is the difference of actuators. Its braking is not by hydraulic pump, but by motor-driven calipers, so there are no hydraulic pipes, master cylinders, sub-pumps, vacuum boosters and other components.