A32 2 BITDI 180 BMT HIGHLINE 4M-PERM CrewCab
-
£17,500
- Year/Month: 2016/0
- Stock ID: T116681
- Transmission: Automatic
- CC: 2000
- Mileage: 101138
- Fuel Type: Diesel
- 242 Views
Lots today's cars and that can be valid for vw amarok crew cab for sale are almost all equipped with disc brakes, with some models equipped with drum brakes, it is precisely on these two types of systems that are used in vehicles, usually. We should then talk about the emergency brake, the service brake, the parking brake and the engine brake. However, these are not the topics we want to address here. On the contrary, the technical aspect linked to particular components is what interests us a lot.
Pascal's Principle
Now let's have a precise look on Pascal's principle that is the basis. Modern braking systems base their operation on a classic principle of fluid mechanics, known as the Pascal principle: the pressure exerted on a liquid is transmitted in the same way in all directions. Therefore, if a favorable surface ratio is studied, large forces can be applied to start from smaller forces. In practice, through the modulation of the surfaces, a multiplication of the force can be obtained. This means that in view of the force applied by the driver during the circuit activation, it is possible to obtain a sufficiently high braking force value on the piston of the drum or disc. The pressures involved in the hydraulic circuits of the braking systems are very high, as is the heat that develops during braking. In extreme cases, they can even reach on pinnacle. Obviously, we are talking about vehicles for tourist use. This is also the reason why small quantities of hydraulic fluid are used, which due to its high incompressibility produces very high-pressure peaks.
The Solutions
The drum brake solution is often considered an obsolete solution. This can be partly true, as the simplicity of the disc brake, the best performances in absolute terms and the simplicity of maintenance have made the brake with rotor and caliper the protagonist of the most modern systems. In fact, on some of today's cars, there are still on the rear axle with drum brakes. This happens for some fairly simple reasons. The drum brake has very low manufacturing costs, a lot of maintenance extended over time and performance sufficiently good to equip the rear-end of medium-small sized cars. During braking, in fact, the vehicle pitches, moving its mass forward. This causes a reduction in the rear axle and therefore a consequent decrease in grip due to the lower load acting on the rear wheels. The load transfer decreases the masses to be managed at the rear of the vehicle and, therefore, the braking power required for the rear is much lower than the front one.
The Reason
This is also the reason why in the classic configuration, the mixed systems foresee the discs at the front and the drums at the rear. Among the many notes regarding this kind of brakes, it is worth emphasizing that this solution is still today almost universally used in the truck world. From a strictly technical point of view, a drum brake is formed by a special plate which takes care of accommodating the brake linings or shoes or, again, jaws. The actual drum, generally made of cast iron, is mounted at the end and is connected directly to the hub. It is sometimes possible to notice an issue on the external surface of the drum, to which two different tasks are assigned: that of constituting a reinforcing element for the drum itself and that of dissipating as much heat as possible. The logs, of a circular shape, are bound to the ends, one of which is connected to the piston and pivoted to the plate to be able to rotate when, as a result of the pressure on the pedal, the piston pushes the ends connected to it. So, above discussion that is for awareness purpose should help to evaluate that accurate used VW Amarok crew cab price, too.