Why does the brake fail after the engine is turned off?
1 Answers
The reason why the brake fails after the engine is turned off is: When the vehicle is turned off, the engine stops working and no longer generates vacuum, causing the brake booster to disappear and making the brake pedal difficult to press. Below is relevant information: 1. Introduction to brakes: Brakes, also known as stopping devices, refer to the action of stopping or reducing the speed of running locomotives, vehicles, other transportation tools, or machinery. 2. Principle: When the engine is running, pressing the brake pedal closes the vacuum valve under the action of the push rod, while the air valve at the other end of the push rod is opened. After air enters, it creates an unbalanced air pressure state in the chamber. Under negative pressure, the diaphragm is pulled towards the brake master cylinder, thereby driving the push rod of the brake master cylinder, which further amplifies the leg force.