Air brakes are safety and reliability focused stops for trucks, trailers, and buses but require understanding of the function and the upkeep for transportation and logistics personnel. Heavy vehicles rely on air brakes for stopping power. Conventional passenger vehicles utilize hydraulic brakes. For heavier, and more demanding vehicles, air brakes are needed because as long as the air brakes are under demanding conditions, performance remains constant and reliable. Haldex is the air brakes solution, with products optimized to improve performance and reliability.
How Air Brakes Operate
The air brake system consists of multiple parts with multiple functions but all of which utilize the brakes and some rely on the actuation of the air brakes to function. In the system, the air is always kept compressed and this is the primary variable of the system. A compressor keeps air in the system compressed. In the actuating system, the compressor supplies the air to the actuator which pushes on a diaphragm or piston. In an actuating system, as the driver's foot applies more pressure on the brake, more compressed air moves.
There are a number of benefits of using air brakes instead of hydraulic brakes:
- Air brakes provide consistent stopping power when used for large vehicles
- In case of an emergency where air pressure is lost, the brakes are engaged automatically
- Hydraulic systems are designed for high load situations
- Air brakes can be used for vehicles of many sizes and weights
Because of the reliable braking systems, air brakes are the most common braking systems used for trucks, commercial trailers and buses.
Main parts of air brakes
An air brake system is a safe system that works because of the following components:
- The compressor produces the air needed to operate the brake systems.
- Air tanks store the compressed air for immediate use.
- Air pressure is converted to mechanical energy in the brake chambers.
- Slack adjusters keep the brakes properly aligned and maintain the appropriate amount of tension.
- Air lines and valves provide the air needed for each of the brake systems.
- The parking brake system is composed of spring brakes, and when compressed air is lost, the brakes spring engaged for secure stopping when the vehicle is stationary.
For a reliable brake system to operate optimally, regular preventative maintenance for each of these components is needed.
Benefits of Using Air Brakes for Heavy Vehicles
When looking at air brakes in comparison to hydraulic brakes in commercial vehicles, air brakes have more benefits:
- Stronger braking force – air brakes create more of a pulling force as there is compressed air
- Fail safe mechanisms – if there is a case of lost air in the system, the brakes will activate and stop the system
- Lower servicing costs – the design of the air brakes is more simplistic than the hydraulic brakes which makes the servicing needed to be done more infrequent
- Easier to connect to trailers – multiple trucks can be connected so that they all stop using the same braking system
Because of all of these benefits, air brakes are now being used in all types of long-haul trucks, buses, and heavy-duty trailers as they are very safe and reliable.
Safety and Maintenance with Air Brakes
To ensure safe, proper functioning, and reliable operation of air brakes, the system requires proper maintenance. Necessary practices are as follows;
- Regular inspections of air lines, brake chambers, and valves should be done to repair damages or leaks.
- The drain valves in air tanks should be used to drain any water, as water can cause rust or freeze.
- The adjustment of brakes should be monitored as slack adjusters may be set incorrectly.
- The constant pressure of the system is to be ensured to verify the operation of the compressor.
By following these tips, the users of the system will be ensured that the braking system will function as intended, and the overall lifespan of the system will be increased.
Conclusion
Understanding the air brake system, its components, and advantages and practicing proper maintenance, fleet operators and drivers can maximize performance and safety of air brakes on the road. Haldex, a reliable and trusted air brake solutions provider, is a top choice for components and customer support. Heavy vehicles also need durable air brakes for safe, efficient, and worry-free operations.
