Suspension Systems
Types of Vehicle Construction
Unitized body
Tends to be more tightly structured.
Is designed to transmit impact energy throughout the vehicle.
Body over frame
The body and all major parts are bolted to the frame.
Design is used on many pickups and SUVs.
Definitions
Spring
A component used to absorb shock forces while maintaining vehicle height.
Absorbs energy on compression (jounce) and releases energy during extension (rebound).
Shock absorber
A component used to damp or control motion in a vehicle.
Shock absorbers dampen spring oscillations.
Types of Shock Absorbers
Hydraulic
Uses hydraulic oil.
Gas-charged
Uses nitrogen gas as well as oil.
Air
Uses air chambers to control the height of the shock.
MacPherson Strut Components
Spring
Shock absorber
Upper suspension mount or locator
SLA Suspension Components
Wheel spindle assembly (Knuckle)
Upper and lower control arm (Suspension arms)
Upper and lower ball joints
Shock absorber
Spring