Semi-trucks are a common sight on the roads, and are essential for many industries that rely on freight transportation. Semi-trucks are capable of carrying large amounts of cargo and have a much greater capacity than most cars. As such, it is important to ensure that they have reliable brakes so that they can stop safely when needed. Semi-truck brakes are known as air brakes.
Air brakes are the most common type of brake used in semi-trucks, and they work by using compressed air to force a set of pads against the wheel to bring the vehicle to a stop. Air brakes use a system of valves, tanks, and hoses to carry pressurized air from the compressor to the wheels.
When the driver presses on the brake pedal, it activates a valve which releases air into the braking system. The compressed air then forces a set of pads against each wheel, creating friction and slowing down or stopping the semi-truck.
Air brakes have several advantages over other types of brakes. They can generate more force than other types of brakes, allowing them to stop heavier loads more quickly and reliably.
Additionally, air brakes are less prone to wear and tear since there is no direct contact between metal parts like with drum or disc brakes. Air brakes also provide greater braking power in wet or icy conditions than traditional brake systems because there is no direct contact between metal parts which can cause them to slip in slippery conditions. Semi-truck drivers must pass special tests before they can be licensed to operate vehicles with air brake systems.
Semi-trucks also often use additional braking systems like engine retarders or exhaust brakes which help slow down the vehicle by using engine power instead of friction from brake pads. Engine retarders work by increasing engine rpm while decreasing torque output at an axle, while exhaust brakes use exhaust pressure to slow down an engine’s rotation speed. Together these additional braking systems provide extra stopping power when needed.
In conclusion, semi-truck brakes are called air brakes because they use compressed air instead of metal parts like drum or disc brakes for improved performance and reliability. The additional systems like engine retarders and exhaust brakes provide extra stopping power when needed for heavy loads on long descents. Semi truck drivers must be properly trained and certified before being allowed to operate vehicles with air brake systems.
