What cars use vacuum brake boosters

Vacuum pump / vacuum pump of the brake system for the car buy used or new cheap

The Vacuum pump is Part of the braking system and takes care of the negative pressure from the Brake booster is required to support the braking process. The pump is sometimes also referred to as a vacuum pump, although the component does not actually generate a vacuum.

The pump is always used when the required negative pressure cannot be generated by the vehicle in any other way, which applies to modern diesel engines and some gasoline engines.

Brake booster requires negative pressure

The Brake booster is standard equipment in most vehicles today. It ensures comfortable braking by holding the Strength decreasedwith which the driver act on the brake pedal got to.

The force required to apply the brakes of a modern car would be much higher if no brake booster were installed. This becomes noticeable, for example, when a defective vehicle without a running engine towed away suddenly and for the operation of the brake higher pedal pressure necessary is.

In cars and in most light commercial vehicles, a brake booster that works with negative pressure is used. When the hood is open, the component can usually be seen in the form of a large, flat box in the area of ​​the driver's seat on the partition wall to the passenger compartment. However, other designs are also possible.

Which vehicles need a vacuum pump or vacuum pump?

The vacuum, the for Operation of the brake booster necessary can be generated in different ways. This happens with many conventional gasoline engines Generating the negative pressure in the intake tract.

No additional pump for the negative pressure is necessary here. However, some modern gasoline engines do not have a throttle valve in the intake tract, which would be necessary to generate the negative pressure, and have, for example, a variable valve control.

As a result, it is not always possible, even with gasoline engines, to generate the negative pressure directly through the engine. Especially Diesel engines require a separate pumpin order to generate the negative pressure for the brake booster, since here too the engine itself is not suitable for creating negative pressure in the intake tract due to its design.

The design can differ

In the automotive industry can be used to generate negative pressure different types of pumps can be used. A distinction must be made, for example, between electrically and mechanically operated pumps. Electric pumps for generating negative pressure have an electric motor that drives the pump.

Vacuum pumps in automotive engineering are often used, however Driven directly by the running engine. Depending on the type of engine and the vehicle model and manufacturer, the type of mechanical drive can differ.

The pump is often driven by the camshaft, and piston pumps can be used. Other types of drive are also possible, and the range of new and used spare parts for cars from various manufacturers is correspondingly broad.

Pumps that are directly driven by the motor are in operation as soon as it is started. After the engine has been switched off, the pumps no longer deliver vacuum, which is why the brake booster in vehicles with a mechanically driven vacuum pump only works when the engine is running.

Advantages and disadvantages of the brake booster

The Brake booster makes braking easier considerable, so that nowadays nobody would want to do without this component. With the assisted brakes of modern vehicles, the braking force can also be increased dose finer, in addition, a shorter pedal travel is usually necessary.

The disadvantage are that if the car breaks down and the engine is not running, it is much more difficult to brake, for example if it is being towed by another vehicle. They are also used to operate the brake booster further components, such as the pump for generating negative pressure, is necessary.

In addition to the brake booster itself, these vehicle parts can also be used work incorrectly or breakso they have to be bought new, which in turn creates costs.

Possible defects in the brake vacuum pump

During operation, the vacuum pump is subject to constant stress and constant wear. As a result, such a component can also once End of its life reach and break. If the negative pressure is then no longer or only partially available, the brake booster can no longer work as intended.

As a result, the force that is required to brake the vehicle reliably can increase. The defect can also be noticeable, for example, when the brake pedal is particularly hard to the touch when the engine is not running and it is difficult to press it down.

When the engine is started, the brake pedal should then normally feel much softer when pressed, which sometimes does not occur with a defective vacuum pump. Is there any suspicion of one Defect in brake componentsso should a Professional to be consulted.

Change the vacuum pump

Since the pump is a safety-relevant component the brake system is involved, a possible defect should be clarified in a workshop. The skilled person will Check vacuum pump and change if necessary.

In addition to a defective pump, defective hoses can also be responsible for a drop in negative pressure. In addition, poor braking or a difficult-to-use brake pedal can have many other causes that should be ruled out before replacing the pump.

Buy a new component online

Vacuum pumps are made by various manufacturers and are online available for many vehicle models. The selection of the right pump and the price comparison are particularly easy here. Suitable pumps for many car brands and models can also very cheap can be purchased new or used, which can save a lot of money. Such vacuum pumps for the brakes can also be bought cheaply, e.g. from local car recycling.