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Tuesday, 7 February 2017

SENSOTRONIC BRAKING SYSTEM

Sensotronic Brake Control (SBC) works electronically and thus faster and more precise, than a conventional hydraulic braking system. As soon as the brake pedal is pressed, the sensor identifies the driving situation in hand; the system makes an exact calculation of the brake force necessary and distributes it between the wheels as required. This allows SBC to critically reduce stopping distances. SBC also helps to optimize safety functions such as ESP, ASR, ABS and BAS.



          With Sensotronic Brake Control, electric impulses are used to pass the driver’s braking commands onto a microcomputer, which processes various sensor signals simultaneously and depending on the particular driving situation, calculates the optimum the optimum brake pressure for each wheel. As a result, SBC offers even greater active safety than conventional braking systems when braking in a corner or on a slippery surface. A high-pressure reservoir and electronically controllable valves ensure that maximum brake pressure is available much sooner. Moreover, the system offers innovative additional functions to reduce the driver’s workload. These include Traffic Jam Assist, which brakes the vehicle automatically in stop-and-go traffic once the driver takes his or her foot off the accelerator. The Soft-stop function allows particularly soft and smooth stopping in town traffic

WORKING OF HYDRAULIC BRAKE
                   The hydraulic brake consists of a pedal, brake booster, master cylinder, tubing and flexible hose, wheel cylinders, brake shoe and the brake drum. The brake pedal is connected to master cylinder through brake booster and the master cylinder is linked to the wheel cylinders using tubing and flexible hose. The wheel cylinders containing two opposed output pistons, each of which is attached to a brake shoe fitted inside the brake drum
When the brake pedal is pressed, the brake booster connected to it amplifies the pressure on the pedal. This pressure moves the piston on the master cylinder forcing the brake fluid through the tubing and flexible hose to the wheel cylinders. The output piston pushes the brake shoe against the wall of the brake drum, thus retarding the rotation of the wheel. When pressure on the pedal is released, the springs on the brake shoe return the wheel cylinder piston to their released position. This action forces the displaced brake fluid back through the flexible hose and tubing to the master cylinder.

            The force applied to the brake pedal produces a proportional force on each of the output pistons, which in turn apply the brake shoes frictionally to the turning wheels to retard rotation.

WORKING OF SENSOTRONIC BRAKE (SBC)

            In Sensotronic Brake Control a large number of mechanical components are simply replaced by electronic components. SBC mainly have three parts – an actuator unit, electronic control unit, hydraulic power supply and hydraulic unit.

             

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