Add to Cart
Car Brake System Front Wheel Kit AMG4 355*28mm Disc For Benz W212
Introduction to Braking
A brake is a component that generates a braking torque, a force
used to hinder the movement or tendency of a vehicle to move. At
present, friction brakes are mostly used in automobiles, which use
the friction between the fixed element and the working surface of
the rotating element to generate braking torque.
Depending on the installation position, the brakes can be divided
into wheel brakes and central brakes. The brake with the rotating
element fixed on the wheel or axle shaft is called the wheel brake;
the brake with the rotating element fixed on the drive shaft of the
transmission system is called the central brake. Wheel brakes are
generally used for service braking, but also for emergency braking
and parking braking; central brakes are generally only used for
parking braking and retarding braking.
According to the different rotating elements, friction brakes can
be divided into two categories: drum type and disc type. The
rotating element in the friction pair of the drum brake is the
brake drum, and its cylindrical surface is the working surface; the
rotating element in the friction pair of the disc brake is the
disc-shaped brake disc, which is The end face is the working
surface.
Disc brakes are divided into caliper disc brakes and full disc
brakes according to the different structural forms of their fixed
elements. The fixed element and the rotating element of the
friction pair of the full disc brake are disc-shaped, which are
called the fixed disk and the rotating disk respectively. All the
working surfaces of the brake disc can be in contact with the
friction plate at the same time, and its structure principle is
similar to that of the friction clutch
Caliper disc brakes have strong heat dissipation capacity and good
thermal stability, so they are widely used in most cars and light
trucks.
According to the structure of the brake caliper, the caliper disc
brake can be divided into two types: fixed caliper disc type and
floating caliper disc type.
Fixed caliper disc brake
The brake caliper of the fixed-caliper disc brake is fixedly
installed on the axle, which can neither rotate nor move along the
axis of the brake disc, so it is necessary to install brake pad
actuation devices on both sides of the brake disc (for example,
Equivalent to the hydraulic cylinder of the wheel cylinder), in
order to press the brake pads on both sides against the brake disc
respectively.
Schematic diagram of the structure of the fixed caliper disc brake.
The brake disc is fixed on the hub, and the brake caliper is fixed
on the axle, which can neither rotate nor move axially along the
brake disc. The brake caliper is equipped with two brake wheel
cylinder pistons, which respectively press the brake pads on both
sides of the brake disc. When the driver steps on the brake pedal
to brake the car, the brake fluid from the brake master cylinder is
pressed into the brake wheel cylinder, the hydraulic pressure of
the brake wheel cylinder rises, and the pistons of the two wheel
cylinders move to the brake wheel under the action of hydraulic
pressure. The moving disc presses the brake pad against the brake
disc, and the brake pad clamps the brake disc to generate a
friction torque that prevents the rotation of the wheel to achieve
braking.
The manufacturing process of the hydraulic cylinder in the
fixed-caliper disc brake is similar to that of the general brake
wheel cylinder, so this structure was adopted when the disc brake
came out in the mid-1950s, and it was still popular until the end
of the 1960s. However, this brake has the following disadvantages:
1) There are many hydraulic cylinders, which makes the structure of
the brake caliper complex;
2) The hydraulic cylinders are placed on both sides of the brake
disc and must be connected by the inner oil passage or the outer
oil pipe of the caliper that spans the brake disc. This inevitably
makes the size of the brake caliper too large to be installed in
the rim of a modern car;
3) When the heat load is large, the brake fluid in the hydraulic
cylinder (especially the outer hydraulic cylinder) and the oil pipe
or oil passage across the brake disc is easily vaporized by heat;
4) If it is to be used as a parking brake, a mechanically actuated
parking brake caliper must be installed.
These shortcomings make it difficult for fixed-caliper disc brakes
to adapt to the requirements of modern automobiles, so since the
1970s, they have gradually given way to floating-caliper disc
brakes.
Item Name | Front brake kit |
OEM | AMG4 |
Disc Size | 355*28/380*28mm |
Custom logo | Available |
Application | For Benz/BMW |
Caliper Material | Alumiunm |