Why would we ever want to use a hydraulic master cylinder to generate pressure to be picked up by a pressure sensor simply to generate an electronic demand signal to an ECU? Why is the system at the rear so much more complex?Ĭompared with the front, at first glance the rear system looks byzantine in its complexity.
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The ECU distributes its efforts to the three system according to the manner that the team has set up the car, modified by the way that the driver has adjusted the switch settings on the steering wheel. The harder the driver presses, the larger the signal the larger the signal the more aggressively the ECU will send out demands to the three rear systems (the brake callipers, the engine braking and the MGU-K) to provide the retardation requested. The signal from this sensor represents the overall rear braking demand from the driver and is passed to the Electronic Control Unit (ECU) where it is turned into a series of commands to brake the rear of the car. When the driver presses the pedal, the fluid pressure he generates in the rear braking circuit is picked up by an electronic pressure sensor.
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At the rear, things are a lot more complex.Īt the rear, the wheels can be decelerated by three separate sources: friction from the brakes, resistance from the spinning engine - so called "engine braking" - and finally, electrical braking that results from harvesting energy by the hybrid electric motor - the MGU-K (Motor Generator Unit - Kinetic).Īlthough the driver can adjust each of these effects independently on his steering wheel, when he presses the brake pedal, the three systems act in concert via the Brake By Wire (BBW) system to provide the driver the overall retardation he has requested. Inside each calliper, six pistons clamp pads against the disc - and it is this friction that slows the car down. The fluid pressure is delivered directly to the front brake callipers. When the driver steps on the brake pedal, it compresses two master brake cylinders - one for the front wheels and one for the rear - which generate fluid pressure.Īt the front, the system is very straightforward. Similar to a road car, the brakes on a Formula One car work on all four wheels.
How does the brake system on an F1 car work? This can have a major impact on a driver's lap time. If the car isn't slowed down at the right point and with the right pressure on the pedal, it will compromise the remaining phases - hitting the apex, taking the right line, carrying the optimum speed through the corner, getting the power down on exit and completing a clean run to the next turn. Braking is the first element in a Formula One car's cornering phase.
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