Transcript Rear Suspension Systems

Rear Suspension Systems
Live-Axle
Live-Axle with Leaf Springs
(Hotchkiss)
• Leaf springs control side sway
• A large amount of unsprung weight
• Take up a lot of space
Rear Axle Torque Reaction
• Axle Wind-up
Note:
The axle is mounted off center on the spring
Helps prevent axle wind-up
Also…….
Mounting one rear shock in
the front of the axle and one
behind the axle helps to
reduce wind up and axle
tramp
OFF-SET SHOCK DESIGN
Live-Axle with Coil Springs
• The upper control arms control lateral
movement (side movement)
• The lower control arms control differential
torque (wind up)
Trailing Arm
“A” shaped control arms mounted at an
angle, called semi-trailing control arms
Used on
many sports
cars.
Handles
cornering
loads better
Multilink Independent Rear Susp.
Note
Hydraulic
mount
Superior
noise and
vibration
dampening
Rear Suspension Systems
On FWD Vehicles
Semi-Independent
• The axle assemble twists, gives semi-independent
effect
• The axle assembly acts as a sway bar
• Track bar controls side movement
Tracking Bar with Diagonal Brace
• Both prevent lateral (side) axle movement.
Independent Rear with MacPherson Struts
• Caster & Toe
adjustable
• Improved
ride quality,
steering
control, tire
life, &
traction
• Lighter
Independent Rear with Shocks
• Toe is
adjustable
• Camber is
not
Camber & Toe Adjustments
Transverse Mono Leaf Spring
•
•
•
•
Fiberglass
Lightweight
Compact
High tension
Transverse Mono Leaf Spring
Tie Rods
Trailing Arm
• Torque loads
create bushing
and control arm
deflection
during braking,
corning,
acceleration and
deceleration.
• This causes a
toe change to
enhance straight
line stability
• Toe change
during corning
leads to quicker
and more
responsive
steering
Double
Wishbone