2012 SSANGYONG NEW ACTYON SPORTS ABS

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Under View (4WD, Automatic Transmission)
Rear suspension
1. SUSPENSION
The suspension is the device to connect the axle and vehicle. It absorbs the vibrations and
impacts from road surface, which enhances the comforts, driving force, braking force and
drivability.
Front suspension

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2. FRONT SUSPENSION (DOUBLE WISHBONE)
Advantage ▶
The advantage of a double wishbone suspension is that it is fairly easy to work out the effect
of moving each joint, so the kinematics of the suspension can be tuned easily and wheel
motion can be optimized.
It is also easy to work out the loads that different parts will be subjected to which allows more
optimized lightweight parts to be designed.
They also provide increasing negative camber gain all the way to full jounce travel unlike the
MacPherson strut which provides negative camber gain only at the beginning of jounce travel
and then reverses into positive camber gain at high jounce amounts. 1.
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3.
Disadvantage ▶
The disadvantage is that it is slightly more complex than other systems like a MacPherson strut.
Due to the increased number of components within the suspension setup it takes much longer to
service and is heavier than an equivalent MacPherson design. 1.
2. Double wishbone suspension is an independent suspension design using two (occasionally parallel)
wishbone-shaped arms to locate the wheel. Each wishbone or arm has two mounting points to the
chassis and one joint at the knuckle. The shock absorber and coil spring mount to the wishbones to
control vertical movement. Double wishbone designs allow the engineer to carefully control the
motion of the wheel throughout suspension travel, controlling such parameters as camber angle,
caster angle, toe pattern, roll center height, scrub radius, scuff and more.
Lower arm Upper arm Shock absorber Stabilizer

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3. REAR SUSPENSION (MULTI LINK TYPE)
Multi-link (5-Link) type suspension is the independent suspension. It provides good ride comfort
and drivability by reducing the coil spring weight. Also, it increases the space for passenger
compartment by lowering the floor. This type of suspension consists of multiple links such as coil
spring, shock absorber, upper and lower arms, lateral rod and stabilizer bar.
Shock absorber Stabilizer bar Rear coil spring
Lower arm Upper arm Lateral rod

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2) Camber
The angle between the center line of the tire and the vertical line when viewed from the front of
the vehicle
CamberLH -0.19° ± 0.25°
RH -0.29° ± 0.25°
Positive camber: Top of the tire is tilted outward ▶
Advantages: The axle is not bent when it is loaded.
The force required to operate the steering wheel is reduced due to
smaller contact area (or load area) of the tire.
Restoring force of the steering wheel is gained (when turning the
steering wheel, the tire circles and the force to lift the frame is applied.
In this case, the shock absorber contracts and the restoration force is
applied to the steering wheel.) -
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Disadvantages:Cornering force decreases as the positive camber increases when
the vehicle makes turn.
The hub bearing is worn unevenly if camber is excessive. -
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Zero camber: When the tire center line is perpendicular to the ground level ▶
Negative camber ▶
Advantages:
Better traction force due to wide load area (applicable for off-road vehicle)
Better corner driving when the vehicle makes turn as the cornering force
increases (applicable for high-speed F1 vehicle) -
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Disadvantages:
he axle is easy to be bent or deviated in the negative camber than in
the positive camber when load is applied on the axle.
Difficult to control due to wide load area. -
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2. SYSTEM OVERVIEW
1) Terms and Definition
CBS: Conventional Brake System
ABS: Anti-Lock Brake System
EBD: Electronic brake-Force Distribution
ESP: Electronic Stability Program
ABD: Automatic Braking Differential
ASR: Acceleration Slip Regulation
AYC: Active Yaw Control (Understeer and Oversteer Control)
HBA: Hydraulic Brake Assistant
ARP: Active Rollover Protection
HSA: Hill Start Assistant
Brake pad: Brake pad is a component of disk brakes used in automotive and other
applications. Brake pad is steel backing plates with friction material bound to the surface that
faces the brake disc.
Brake disc: The brake disc is a device for slowing or stopping the rotation of a wheel while it is
in motion.
Brake caliper: To stop the wheel, friction material in the form of brake pads (mounted on a
device called a brake caliper) is forced hydraulically against both sides of the disc. Friction
causes the disc and attached wheel to slow or stop.
Brake master cylinder: The brake master cylinder is a control device that converts non-
hydraulic pressure (commonly from a driver's foot) into hydraulic pressure, in order to move
other device(s) which are located at the other end of the hydraulic system, such as one or
more slave cylinders. As piston(s) move along the bore of the master cylinder, this movement
is transferred through the hydraulic fluid, to result in a movement of the slave cylinder(s). The
hydraulic pressure created by moving a piston (inside the bore of the master cylinder) toward
the slave cylinder(s) compresses the fluid evenly, but by varying the comparative surface-area
of the master cylinder and/or each slave cylinder, one will vary the amount of force and
displacement applied to each slave cylinder (relative to the amount of force and displacement
that was applied to the master cylinder). -
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FunctionVehicle with CBS
Vehicle with ABS/EBD Vehicle with ESP
ABS
Not appliedApplied
Applied EBD Applied
ABD
Not applied ASR
AYC
HBA
ARP
2) Functions

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3) Parts Arrangement
Part nameVehicle with CBSVehicle with ABS/EBDVehicle with ESP
HECU
Not appliedAppliedApplied Front wheel speed sensor
Rear wheel speed sensor
ABS warning lamp
EBD indicator
Longitudinal G sensor 2WD: N/A, 4WD: Applied Not applied
Sensor cluster
(Yaw rate sensor,
lateral/longitudinal G sensor)
Not applied Applied
ESP indicator
ESP OFF switch and warning
lamp
Steering wheel angle sensor
4) Components
ABS ESP+ARP
2WD 4WD 2WD 4WD
Whhel speed sensor 4 4 4 4
Sensor cluster N/A N/A Applied Applied
G-sensor N/A Applied N/A N/A
2H G-sensor - Operating - -
4H G-sensor - Operating - -
4L G-sensor - Operating - -
2H sensor cluster - - Operating Operating
4H sensor cluster - - Operating Operating
4L sensor cluster - - Operating Operating

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5) Indicators and Warning Lamps for ABS/ESP
LampIndicator/Warning Lamp
Description
EBD warning lamp ON when EBD function is failed
ABS warning lamp ON when ABS function is failed
ESP indicator Blinking when ESP function is operating
ESP OFF indicator ON when the ESP OFF switch is pressed
ESP warning lamp ON when ESP function is failed
ESP buzzer Sound when ESP function is operating

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Brake Fluid ▶
Brake Fluid Type ▶ 1. Color
Ligh gold (New oil) → Brown → Black -
2. Service Interval/Type
Change: every 2 years, Type: DOT4
The water in the brake fluid has an adverse effect to the brake system. If the fluid contains
around 3% of water, the boiling point of the brake fluid goes down by 25%. It will cause
the vapor lock frequently.
Water content in fluid: around 3% after 18 months, around 7~10% after few years
The water ib fluid makes the corrosion in the brake lines, deforms and deteriorates the
rubber components, brake calipers and pistons. -
DOT4: Brake fluid for premium vehicle. Lower water absorbing rate AND higher boiling point
than DOT3
Brake Fluid Level Check ▶
The brake fluid level should be between "MAX"
and "MIN" on the reservoir. If it is below "MIN"
mark, check for oil leaks and refill the reservoir
with the specified fluid.