Purpose of anti lock braking system12/9/2023 The theory of operation is simple: when the gyroscopic sensor detects that the direction taken by the car doesn't agree with what the wheel sensor says, the ABS software will brake the necessary wheel(s) (up to three with ABS 8.1 or greater) so that the car goes the way the driver intends. In modern ABSes, two more sensors are added to help ESP work: these are a wheel angle sensor, and a gyroscopic sensor. The sensors can become contaminated with metallic dust and fail to detect wheel slip this is not always picked up by the internal ABS controller diagnostics. This process is repeated contionously, and this causes the characteristic pulsing feel through the brake pedal. Wheel(s) then turn faster and when they turn too fast, the force is reapplied. When it senses that any number of wheels are rotating considerably slower than the others (a condition that will bring it to lock ) it moves the valves to decrease the pressure on the braking circuit, effectively reducing the braking force on that wheel. The electronic unit constantly monitors the rotation speed of each wheel. The anti-lock brake controller is also known as the CAB (Controller Anti-lock Brake).Ī typical ABS is composed of a central electronic unit, four speed sensors (one for each wheel), and two or more hydraulic valves on the brake circuit. ABS Systems were later introduced on motorcycles. They first appeared in trucks and the Mercedes-Benz S-Class. The German firm Bosch had been developing anti-lock braking technology since the 1930s, but the first production cars using Bosch's electronic system became available in 1978. The first car (worldwide) to have ABS fitted as standard (across the entire range) was the Ford Granada Mk 3 (of 1985). It saw limited automobile use in the 1960s in the Ferguson P99 racing car, the Jensen FF and the experimental all wheel drive Ford Zodiac, but saw no further use the system proved expensive and, in automobile use, somewhat unreliable. An early system was Dunlop's Maxaret system, introduced in the 1950s and still in use on some aircraft models. Download Financial Express App for latest business news.Anti-lock braking systems were first developed for aircraft. Get live Share Market updates and latest India News and business news on Financial Express. EBD system ensures that this does not happen. That could result in the wheel slipping and hence, a loss of control for the vehicle. Under its absence, all the wheels will be applied with the same braking force, irrespective of the traction and the weight supported. What are the advantages of Electronic Brake Force Distribution?Īs explained, the Electronic Brakeforce Distribution ensures that the right amount of force is applied to each wheel according to the weight supported by it.
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