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Chapter 1Introduction
DefinitionChassis: All vehicle structures except body and engine
Chassis Components:Chassis BeamSteering SystemBraking SystemSuspension SystemTire and WheelDriveline (gearbox, propeller shaft, drive shaft)
Basic Vehicle Motions6 Basic Motions of a Vehicle:Roll MotionPitch MotionVertical MotionYaw MotionLateral MotionLongitudinal Motion
Vehicle Roll
Steering input from the driver or asymmetric road profile between left and right tires can cause the vehicle to roll
Excessive roll angle can cause the vehicle to rollover
Disadvantages of vehicle roll: reduces stability and safety, driver can loss control of the vehicle; and reduces passenger comfort
Vehicle Pitch Braking/throttle inputs from the driver or asymmetric road profile between front and rear tires can cause the vehicle to pitch
Disadvantages of vehicle pitch: reduces stability and safety, driver can loss control of the vehicle; and reduces passenger comfort
Vehicle YawYaw angle: the difference between the direction of vehicle forward speed with the direction of travel
Steering input from the driver, side wind force, asymmetric road friction can cause the vehicle to yaw
Vehicle Lateral Motion Vehicle will move laterally under steering input from the driver
Lateral Maneuvers: lane change, cornering, collision avoidance, etc.
Longitudinal Motion Throttle or braking inputs from the driver can cause the vehicle to move longitudinally
Longitudinal maneuver: accelerating or decelerating
Vertical Motion Vertical motion of the vehicle reduces vehicle comfort level
Road input, steering input, brake input and throttle input can cause the vehicle to move vertically
Body Center of Gravity
How to determine the location of the body center of gravity of a vehicle???