WEDGE BRAKING SYSTEM
This concept deals with the introduction of
electronic wedge brake into the braking system.
It is a new way of braking system i.e.
breaking without hydraulics like the conventional brake. It can
dramatically reduce stopping distances of cars compared with conventional
hydraulic systems. It gives more efficiency to the braking system. The entire
system runs on the standard 12-volt electrical system found in most cars.. We
also designed single motor electronic wedge brake system which is very
effective when compared to normal electronic wedge brake (EWB) which uses two
motor.
What is Electronic Wedge Brake?
The
electronic wedge brake works by a similar principle to that used in brakes for
horse-
Drawn
carriages, where a wedge was used to bring the wheel to a standstill. The EWB,
however,
relies on sophisticated sensor technology and electronics to prevent the brakes
from
locking and ensure highly efficient and controlled braking .
The
wedge uses a vehicle’s kinetic energy, converting it into braking energy. By
reinforcing itself this way, the EWB needs only one tenth of the actuating
energy required by today's hydraulic braking systems.
Given
this superior efficiency, the EWB will also have smaller dimensions, which will
reduce total vehicle weight. What’s more, the EWB will dispense with the need
for brake lines, a servo-unit and a brake fluid reservoir.
While
a conventional ABS takes between 140 and 170 milliseconds to generate full
braking power, the EWB needs only about 100 milliseconds and therefore shortens
the braking distance because a car covers the distance of 1.40 meters in one
second at a speed of 100 kilometers per hour.
below Schematic diagram of the electronic wedge brake:
Components OF Electronic Wedge Brake
system:
The components of the electronic wedge
brake system is shown below.
a)
Brake
calliper
b)
Brake
disc
c)
Brake
pad
d)
Motor(single phase induction motor)
e)
Wedge
shaped system
f)
Rollers.
Working of Electronic Wedge Brake system:
the
piston and the fluid ducts are replaced by a double plate (6), slick on
one side and featuring wedge-shaped "teeth" on the other. The two
teethed plates face each other and lodged between the teeth are small
cylindrical rollers (5). In the caliper, as with a regular brake, the
rubbing pad (2) is set against the fixed, interior plate of the caliper,
while the other pad (exterior) is set against the floating plate of the
caliper. Two small electric motors (3 and 4) also located in the caliper
move the wedges against one another. As a result, when the brake pedal is
depressed, the wedges are "activated"; they push back both plates and
force the pads against the disc. Here
the wedge effect automatically increases the brake force that is
applied. In reality, it's the kinetic energy of the moving vehicle that helps to
slow it down. In other words, the faster the vehicle goes, the harder the
brakes react.
Advantages of EWB:
1. The
EWB is more efficient.
2. It
responds faster.
3. Requires
one tenth of the energy that of conventional brake system.
4. The
EWB will dispense the need for brake lines, a servo-unit, and a brake fluid
reservoir.
5. It
also eliminates brake vaccum boosters ,pistons etc.
6. The
system also has faster reaction time.
7. It
works three times than quicker than the conventional brakes(100ms).
8. The
braking distance required from 100 km/h to 0 km/h was reduced by half in the
EWB.
RIGHTS by
MOSES DHILIPKUMAR .BE
