Skip to main content

Anti-lock breaking system


The vehicle will stop more quickly if the brakes are applied just hard enough to get maximum static friction between the tyres and road. If the brakes are applied harder than this then the wheels will lock, the tyres will skid or slide on the road and a lesser kinetic friction will result. Then braking the vehicle is much less effective.
To prevent skidding and thus provide maximum effective braking several devices have been proposed. Mostly skid control of the rear wheels only is provided. Some others provide control at all the four wheels. What is meant by “control” is this. As long as the wheels are rotating the antiskid device permits normal application of the brakes. But if the brakes are applied so tough that the wheels tend to stop turning and thus a skid starts to develop the device comes into operation and partly release the brakes so that the wheels continue to rotate. Still intermittent braking continues. But it is held to just below the point where a skid would start. The result is maximum braking effect.
Antilock brake system: The hydraulic unit is the central component of an ABS system. Each of the four wheels has a speed sensor, which measures the rotational speed of the wheel. This information is monitored by an Electronic Control Unit: which opens and closes the magnetic valves at the right time. If a wheel is about to lock under heavy braking, the system continues to reduce the hydraulic pressure on that wheel alone, till the threat of locking is past. Once the wheel is turning freely again, the hydraulic pressure is increased. This increase and release of pressure continues until the driver reduces the force on the brake pedal or until the tendency to lock is overcome. ABS is incorporated in some of the cars to prevent skidding and to rove braking.
Senstronic braking control (SBC) Senstronic Braking Control is basically a brake-by-wire system which eliminates the need for mechanical linkage between the brake pedal and brake master cylinder. SBS also work in conjunction with ABS to enhance braking.
It was developed by Mercedes in association with Robert Bosch GmbH. Among its most important performance features are the dynamic building up of brake pressure and the precise monitoring of driver and vehicle behavior using sensors. In an emergency situation, SBC increases brake line pressure and readies the brakes, so that they can grip instantly with full force when the brakes are applied.
Additionally, variable brake proportioning offers enhanced safety when braking on bends. SBC controls each wheel individually. When in corners, they apply varying degree of pressure on the inside and outside wheels of a car, and in the wet road condition. The SBC is found in Mercedes Benz E cars.
Labels:

Comments

Post a Comment

Popular posts from this blog

How to proceed software automation ?

Today, large manufacturers are a wonder of automation: not only their manufacturing processes, but their business processes as well. This software-based approach – much of it in the cloud – saves them time and money and increases the transparency of their processes across departments, locations and even partner companies. For small manufacturers, however, the benefits of software-based approaches aren’t so transparent, and many small companies struggle with the best approach to software-based process automation. Software Advice, a Gartner-owned consulting firm that provides research to software buyers, recently pulled data from its interactions with thousands of manufacturing organizations to  uncover trends  in small manufacturing companies (defined as those will annual revenues of $100 million or less) and their aspirations with regard to software purchasing. The goal was to discover these companies’ software needs and their pain points, as well as what would compe...
Post a Comment
Read more

Bevel protractor

What is bevel protractor ? A bevel protractor is a graduated circular protractor with one pivoted arm used for measuring or marking off angles. Sometimes Vernier scales are attached to give more precise readings. It has wide application in architectural and mechanical drawing, although its use is decreasing with the availability of modern drawing software or CAD. Universal bevel protractors are also used by toolmakers, as they measure angles by mechanical contact they are classed as mechanical protractors. The bevel protractor is used to establish and test angles to very close tolerances. It reads to 5 minutes or 1/12° and can measure any angle from 0° to 360°. The bevel protractor consists of a beam, a graduated dial and a blade which is connected to a swivel plate (with Vernier scale) by thumb nut and clamp. When the edges of the beam and blade are parallel, a small mark on the swivel plate coincides with the zero line on the graduated dial. To m...
Post a Comment
Read more

Interview questions and answers

Mechanical Engineering Interview Questions and answers for freshers on design, safety and maintenance. 1) What is an accident ? An accident is a unexpected and unforeseen event which may or may not injury to a person or a machine tool. 2) What are the standard sizes of drawing board as per Indian Standards? As per Indian Standards :1250×900,900×650,650×500,500×350,350×250 sizes are available. 3) What are the functions of a scale ? (a) To measure distance accurately. (b) For making drawing to scale either in full size, reduced size or enlarged size. 4) What is a sketching ? This is freehand expression of the graphic language. 5) What do you mean by First Aid ? First Aid is immediate and temporary care given to a person who affected accidental injury or a sudden illness before the arrival of doctor. 6) What is a Drawing ? It is a graphical representation of a real thing to define and specify the shape and size of a particular object by means of lines...
Post a Comment
Read more