Anti-Lock Braking System
Anti-lock Braking System (ABS)
Why are they Used is Heavy Vehicles?
ABS is used to prevent car and truck accidents on our roads. Looking at statistics, it can be said that the introduction of ABS has reduced the amount of accidents involving heavy vehicles on our roads, decreasing the number of fatalities. If we are able to prevent crashes, this will save a lot of people's money on repairs.
Another reason that ABS is good on heavy vehicles is the saving in tyre wear. It is estimated that ABS will produce 5% less tyre wear. For heavy vehicles, this will mean that tyres aren’t replaced as often will mean that they can save in costs of new tyres.
How ABS Works? 1. When the brakes are applied, fluid is forced from the brake master cylinder outlet ports to the HCU inlet ports. This pressure is transmitted through four normally open solenoid valves contained inside the HCU, then through the outlet ports of the HCU to each wheel. 2. The primary (rear) circuit of the brake master cylinder feeds the front brakes. 3. The secondary (front) circuit of the brake master cylinder feeds the rear brakes. 4. If the anti-lock brake control module senses a wheel is about to lock, based on anti-lock brake sensor data, it closes the normally open solenoid valve for that circuit. This prevents any more fluid from entering that circuit. 5. The anti-lock brake control module then looks at the anti-lock brake sensor signal from the affected wheel again. 6. If that wheel is still decelerating, it opens the solenoid valve for that circuit. 7. Once the affected wheel comes back up to speed, the anti-lock brake control module returns the solenoid valves to their normal condition allowing fluid flow to the affected brake. 8. The anti-lock brake control module monitors the electromechanical components of the system. 9. Malfunction of the anti-lock brake system will cause the anti-lock brake control module to shut off or inhibit the system.
Why are they Used is Heavy Vehicles?
ABS is used to prevent car and truck accidents on our roads. Looking at statistics, it can be said that the introduction of ABS has reduced the amount of accidents involving heavy vehicles on our roads, decreasing the number of fatalities. If we are able to prevent crashes, this will save a lot of people's money on repairs.
Another reason that ABS is good on heavy vehicles is the saving in tyre wear. It is estimated that ABS will produce 5% less tyre wear. For heavy vehicles, this will mean that tyres aren’t replaced as often will mean that they can save in costs of new tyres.
How ABS Works? 1. When the brakes are applied, fluid is forced from the brake master cylinder outlet ports to the HCU inlet ports. This pressure is transmitted through four normally open solenoid valves contained inside the HCU, then through the outlet ports of the HCU to each wheel. 2. The primary (rear) circuit of the brake master cylinder feeds the front brakes. 3. The secondary (front) circuit of the brake master cylinder feeds the rear brakes. 4. If the anti-lock brake control module senses a wheel is about to lock, based on anti-lock brake sensor data, it closes the normally open solenoid valve for that circuit. This prevents any more fluid from entering that circuit. 5. The anti-lock brake control module then looks at the anti-lock brake sensor signal from the affected wheel again. 6. If that wheel is still decelerating, it opens the solenoid valve for that circuit. 7. Once the affected wheel comes back up to speed, the anti-lock brake control module returns the solenoid valves to their normal condition allowing fluid flow to the affected brake. 8. The anti-lock brake control module monitors the electromechanical components of the system. 9. Malfunction of the anti-lock brake system will cause the anti-lock brake control module to shut off or inhibit the system.