We all have fun pushing down on the brake pedal which
slows a car to stop. But many are not aware that, how does it happens?
Do you know how does your car transmit the force from your leg to
the wheels? How does it multiply the power so that it is sufficient
to stop something as big as a car? In this section we are aiming
to give information about brake system, we would
follow the chain of events from the pedal to wheel, and explaining
all the parts of brake system. It also contains information on parking
brake cable and brake lever.
Types of Brake
Brake is an equipment used in automobiles or machines
to slow down a running object by changing the kinetic energy into
heat energy. Brake is used to stop an object or equipment that is
Brakes generally apply friction to change the kinetic energy into
heat energy, however in renewing brake the kinetic energy is changed
into useful electrical energy or potential energy which is in type
of pressurized air as an alternative to heat energy.
The brakes in automobile stores the heat in the drum brake or disc
brake while braking then carry out it to the air regularly. When
traveling downward few automobiles use its engine to brake.
When brake is pushed the caliper holding the piston pushes the pad
near brake disc to slow down the wheels of automobile. On brake
drums it is same as the cylinder pushes the brake shoes to the drum
which slows the wheels of the automobile.
The Brake Drum is very heavy flat-topped cylinder
that is usually sandwiched between the wheel rim and the drive wheel.
The inside exterior of the drum is acted upon by the friction
fabric of the brake shoes. When the brakes are functional, the friction
material of the brake shoes is forced into contact with the brake
drums to measure the rotation of the wheels. The friction connecting
the tires and the road surface then slows the car's speed. Drum
brakes are found on the rear wheels of most cars, but they
are ever more being phased out in favor of rear disc brakes. Drum
brakes were normal equipment on the front wheels of most cars until
the early 70's.
The master cylinder is associated to each wheel
by brake lines and hoses. Brake hoses are specially constructed
elastic tubes with metal ends for transmitting fluid under extreme
pressure. The entire hydraulic system is filled
with a particular brake fluid, which is forced through the hoses
by the association of the master cylinder's pistons. If they appear
cracked or brittle, the hoses must be replaced immediately. Close
inspection of the brake hoses is a high-quality
way to prevent catastrophe!
The brake pedal is placed on the
left side of the accelerator pedal. Stepping on this pedal begins
the process of slowing down or may stopping a vehicle. The pedal
is solidly mounted to the firewall, and the works
as a force-multiplying lever. If the power assist fails, the pedal's
leverage is intended to allow the driver to still generate thousands
of pounds of force at each wheel cylinder.
Attached to the piston within the master cylinder
via a pushrod, the brake pedal is a majority important
item indeed, unless you're a crash dummy! When the brake pedal is
pressed, the brake shoes and the friction pads are forced into contact
with the brake drums and rotors to measure the rotation of the wheels.
The friction between the tires and the road surface then slows the
pace of the vehicle. A brake pedal must not sink more than an inch
or two, no matter how hard it is pushed with the foot; and the driver
should not feel as if he were stepping on a wet sponge: a spongy
pedal spells difficulty in the braking system.
ANY change in the "feel" of your brake pedal must be a
cause for serious concern. With brakes, there is no excuse for the
The Parking Brake Cable is a brake cable in the
parking brake is typically changeable for length which is made of
steel. Parking brake cable is connected directly to the brake device
on one end and another end is connected to the brake lever of the
rear wheels that is activated by the driver. When brake lever is
pulled, it transmits the force to the brake system. The force is
transmitted by the brake fluid which runs through the cable. In
automobiles with rear drum brakes, the parking brake cable regularly
activates these drums mechanically with less force than is available
through the hydraulic system.
Parking brake cables are available in different sizes like 1/8",
3/16" and also in custom designs. 1/8" brake cable is
designed and produced for used in light to medium duty automobiles.
These cables are used at 1,200 pounds or less. 3/16" brake
cables provide the similar traits as the 1/8" brake cables.
This 3/16" brake cable is suggested for higher load up to 3,000
The Parking Brake Lever in automobiles is a hand
activated system which is also called as hand brake. In cars the
parking brake lever is like a handle on the bottom among the driver
and front seat passenger. It is less commonly a handle bar placed
on the bottom of the dashboard near to the steering wheel or between
the driver and car door. Otherwise the lever is on the bottom in
the form of pedal in front of the driver which is positioned to
the far left separated from the other pedals.
In buses the parking brake lever is outfitted with a hydraulic
brake system will have a hand brake lever which is situated on the
driver left side near to the floor. It is activated by pushing the
lever down with hand to apply the brake, and pulling it upwards
to free the brake.
In large vans when the parking brake lever is pulled it will activate
a valve that lets air or hydraulic pressure or vacuum into the cylinder
which provides power to the brake shoes and makes applying the handbrake
easier. In many cases a little lever in the automobile is coupled
to a valve which admits air to parking brake cylinders to discharge
the parking brake, or discharge the air to apply the brake. In some
recent automobiles the valve is activated electrically from a lever
in the automobile.
of Brake System
Air Brake System
Air Brake System is the brake system used in automobiles such as
buses, trailers, trucks, and semi-trailers. George Westinghouse
created air brakes for utilizing it in trains for railway service.
A secured air brake was patented by him on 5th, March 1872. At first
air brake is produced for use on trains and now it is used common
in automobiles. Read
more about Air Brake System....
Anti-lock Brake System
An Anti-lock Braking System abbreviated as ABS
is a braking system or security system which prevents the wheels
on an automobile from locking up while braking. The wheels revolving
on the road let the driver to maintain steering control
under heavy braking by preventing a skid and allowing the wheel
to continue interacting tractively with the road surface as directed
by driver steering inputs. Read
more about Anti-lock Brake System....
Disc Brake is a brake device for stopping or slowing the rotation
of the automobile wheels. It is also called as Disk brake.
This brake has a brake disc which is also called as rotor
is made up of cast iron or ceramic compounds like carbon, Kevlar
and silica is linked to the wheel and/or the axle. Read
more about Disc Brake....
Drum Brake is a brake in which the friction is caused by a set
of brake pads or brake shoes that
push against the inner surface of a rotating drum. The drum is coupled
to a rotating wheel. The drum brake was invented by Louis Renault
in 1902. Read
more about Drum Brake....
The Hydraulic Brake system is a braking system which uses brake
fluid usually includes ethylene glycol, to transmit pressure
from the controlling unit, which is usually near the driver, to
the actual brake mechanism, which is near the wheel of the vehicle.
more about Hydraulic Brake System....