Brake vacuum sensor failure

Brake vacuum pump is the vacuum booster brake system that provides brake boost for the car.

Brake vacuum pumps are mainly composed of pump body, rotor, blades, intake and exhaust ports. Taking a single-vane vacuum pump as an example, when the driving torque passes through the engine camshaft and the vacuum pump connector to make the rotor rotate, Drive the plastic single blade to follow the contour of the vacuum pump chamber and rotate at the eccentric position of the chamber. The upper side of the single blade is divided into two chambers, the left side is the vacuum chamber, and the chamber rotates as the single blade rotates. The volume of the vacuum booster is getting larger and larger, so that the vacuum degree is generated. At the same time, the vacuum booster is connected to the vacuum booster and has a one-way valve to increase the vacuum degree of the vacuum booster. The right cavity is the compression cavity. The volume of the cavity is getting smaller and smaller, and the lubricating oil and the air drawn from the vacuum booster are compressed to the engine. The lubricating oil from the engine enters from the center of the rotor to lubricate the vacuum pump cavity and corresponding parts, and acts as a seal between the floating terminal on the single blade and the contour of the cavity.

The main types of vacuum pumps used in brake booster vacuum systems in the automotive field are as follows: single-vane vacuum pumps, plunger vacuum pumps, and multi-vane vacuum pumps, among which single-vane vacuum pumps and multi-vane vacuum pumps There are many applications of vane vacuum pumps.

When driving normally, if the brake vacuum pump fails, the brake vacuum pump sensor is required to send a signal to notify the control module so that the car owners know that the car is malfunctioning.

The reason for the failure of the brake vacuum sensor:

1. The brake vacuum pump is damaged due to air leakage and cannot be used.

2. The brake vacuum tube is malfunctioning.

3. The burnout information of the brake master cylinder control module is wrong.

4. The brake vacuum booster sensor is aging and damaged.

5. Loose plug leads to poor contact.

Summary: The above is an introduction to the failure of the brake vacuum sensor, I hope it will be helpful to everyone.

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