Traction control System (TCS)
Traction control is an active vehicle safety feature
designed to help your vehicle make effective
use of all the traction available on the road when
accelerating in slippery conditions. It is important to
remember that traction control cannot create traction
if there is none. Rather, traction control helps
prevent your wheels from spinning on low-friction
surfaces.
Traction control monitors the wheels on the vehicle
for potential “wheel slip”. When a vehicle’s wheels
are slipping, you will feel like your tires are
“spinning” but are unable to catch any grip on the road. When vehicle wheels are spinning, there is
little chance of a controlled acceleration.
When your traction control system senses that one or more of your wheels is about to slip, it corrects the problem by applying the appropriate amount of brake to that wheel. A helpful comparison can be made with anti-lock braking systems (ABS). In fact, ABS setups are the foundation upon which traction control systems are built. ABS helps to prevent wheel slip when a vehicle is braking in slippery conditions, while traction control helps to prevent wheel slip when a vehicle is accelerating in slippery conditions. Many vehicles today are equipped with traction control, ABS, and electronic stability control (ESC). These three braking technologies all address the need to improve traction between the vehicle’s tires and the road. In addition, the use of common sensors, hydraulic brake modulators, and electronic control units (ECUs) makes this trio of technology particularly efficient in terms of internal space occupation and ease of installation.
When your traction control system senses that one or more of your wheels is about to slip, it corrects the problem by applying the appropriate amount of brake to that wheel. A helpful comparison can be made with anti-lock braking systems (ABS). In fact, ABS setups are the foundation upon which traction control systems are built. ABS helps to prevent wheel slip when a vehicle is braking in slippery conditions, while traction control helps to prevent wheel slip when a vehicle is accelerating in slippery conditions. Many vehicles today are equipped with traction control, ABS, and electronic stability control (ESC). These three braking technologies all address the need to improve traction between the vehicle’s tires and the road. In addition, the use of common sensors, hydraulic brake modulators, and electronic control units (ECUs) makes this trio of technology particularly efficient in terms of internal space occupation and ease of installation.
Uses of Traction control System
Traction control is useful whenever you are trying
to accelerate in low-friction conditions. These
conditions include when roads are wet, snowy,
icy, uneven, or poorly maintained. Some concrete
examples of when traction control would be useful
include the following:
• You are attempting to accelerate up a hill where
the surface is loose and gravelly. Without
traction control, your wheels spin and you begin
to slide backwards.
• You hit a patch of slushy road that causes your
wheels to lose traction. As a result, your vehicle
slows down and begins to fishtail.
• Two of your wheels cross an icy section of
road, causing them to spin and lose traction.
As a result, your car turns sharply out of your
control.
• You lose traction driving through a puddle. As
a result, your vehicle cannot maintain its speed,
leaving you in danger of being hit by other
vehicles.
• You are trying to accelerate at a green light on
a slick road with traffic approaching you from
behind.
The usefulness of traction control is not reserved
for off-road adventuring. Variable temperatures and
seasonal changes often result in quickly-changing
weather and can take a hard toll on road conditions.
Traction control can give you extra support for
driving safely in a variety of situations.
How it Works ?
Traction control works similar to ABS and is often
considered as a supplement to existing ABS setups.
Both systems work to solve opposite problems
associated with wheel slippage or wheel lockage.
In fact, in most modern vehicles the traction control
feature uses the same components as ABS, including
wheel-speed sensors (sensors that measure the
rotational speed of the wheel), hydraulic modulator
(the device that applies the brakes when necessary),
and ECU (the control unit that takes information
from the sensors and plans the best course of
action). The addition of traction control to ABS
involves adding another valve to the hydraulic brake-modulator. As such, installing traction control
on a vehicle that already has ABS is relatively
simple.
Traction control uses individual wheel-speed sensors to measure differences in the rotational speed of each wheel. These sensors are located on each wheel. When the ECU senses that one wheel is spinning faster than the others (an indicator that the wheel is losing traction), it sends a message to the hydraulic brake-modulator (attached to the ECU) and automatically reduces the speed of that wheel which lessens the slip Traction control systems have different ways of reducing the rotational speed of individual wheels. Some “pump” the brake to the problem wheel, while other systems combine wheel braking with reduced engine power. In a vehicle that uses reduced engine power to control the rotation of slipping wheels, the driver may experience a pulsation of the gas pedal when traction control is active. This sensation is similar to the experience of having the brake pedal pulsate when ABS is active. Once the wheels have regained traction, the traction control systems returns to monitoring wheel speed and comparing the rotational speed of the vehicle’s wheels.
Traction control uses individual wheel-speed sensors to measure differences in the rotational speed of each wheel. These sensors are located on each wheel. When the ECU senses that one wheel is spinning faster than the others (an indicator that the wheel is losing traction), it sends a message to the hydraulic brake-modulator (attached to the ECU) and automatically reduces the speed of that wheel which lessens the slip Traction control systems have different ways of reducing the rotational speed of individual wheels. Some “pump” the brake to the problem wheel, while other systems combine wheel braking with reduced engine power. In a vehicle that uses reduced engine power to control the rotation of slipping wheels, the driver may experience a pulsation of the gas pedal when traction control is active. This sensation is similar to the experience of having the brake pedal pulsate when ABS is active. Once the wheels have regained traction, the traction control systems returns to monitoring wheel speed and comparing the rotational speed of the vehicle’s wheels.
Limitaions of TCS
Yes. Traction control works by preventing your tires
from slipping, thereby allowing your wheels to take
full advantage of the traction that is available on
the road. Traction control cannot increase the total
amount of traction available. To illustrate this point,
if there is no traction on the road because the road
is iced-over completely, then no one has traction.
Traction control cannot create traction where it does
not exist.
Drivers who choose to drive in slippery conditions
face the challenge of reduced traction equally,
whether or not they have traction control on their
vehicle. The difference is that drivers with traction
control are more likely to successfully accelerate
in low-traction conditions since traction control
prevents their wheels from spinning. In addition,
since the vehicle’s wheels are not spinning, drivers
are able to maintain steering control. However,
it cannot be overstated that drivers with traction
control do not experience more traction; just better
handling on whatever little traction is available.
Therefore, drivers are encouraged to limit or avoid
driving in slippery, low-friction conditions, whether
or not they have traction control.
Cost of TCS
Traction control is normally offered as part of a
larger safety package, rather than as a stand-alone
system. ABS, traction control, and ESC are usually
packaged together in order to equip drivers with the
most modern, complementary braking technologies.
When traction control is offered as a stand-alone
system, it can cost between $200.00 and $500.00.
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