Chassis system Sincerely convinced Part II Chassis system 2.1 Suspension system 2.1.1 Overview of Suspension system 2.1.1.1 Specifications 2.1.1.1.1 General specifications 2.1.1.2 Description and operation 2.1.1.2.1 System overview Suspension is one of the important assemblies in modern automobile.
It connects the frame (or body) and the axle (or wheel) elastically.Its main task is to transfer all the forces and moments between the wheel and the frame (or body), alleviate the impact load from the road surface to the frame (or body), attenuate the vibration of the bearing system caused by this, ensure the smooth driving of the vehicle, ensure the ideal motion characteristics of the wheel when the road surface is uneven and the load changes, and ensure the handling stability of the vehicle,Make the car get high-speed driving ability. It is necessary to select the suspension scheme and parameters correctly.
When the wheels run up and down, the kingpin positioning angle changes little, the wheel movement and the steering mechanism movement should be coordinated to avoid the front wheel shimmy; when the car is steering, it should be slightly understeer. The four-wheel alignment ensures that the four wheels move accurately in the given direction. After four-wheel alignment, the best economy and tire life can be obtained, and the steering performance can be optimized.
(1) Caster angle Kingpin caster angle is the forward or backward inclination of the highest point of the steering axis from the vertical plane when viewed from the side of the vehicle.Backward tilt is positive, forward tilt is negative.Kingpin caster angle affects steering control, but does not affect tire wear.If the spring is too soft or the vehicle is overloaded, the caster angle will be affected.When the caster of one wheel is positive, pull the vehicle toward the center of the vehicle.Even the smallest positive caster angle can cause the vehicle to roll or roll.Caster is measured in degrees and is not adjustable.
(2) Camber angle Camber angle is the angle from which the top of the tire deviates from the vertical plane when viewed from the front of the vehicle.When the tire is cambered, the camber angle is positive.When the tire is tilted in, the camber angle is negative.The camber angle is the degree of deviation from the vertical plane.Camber affects direction control and tire wear.If the positive camber angle of the vehicle is too large, it will lead to wear of the shoulder on the 28 Name Specifications Front wheel alignment parameters Front wheel toe in 0.07 5′ Front wheel camber -0.13° 0.5 Kingpin inclination 11.69 0.5 Caster angle 5.74 0.5 Rear wheel alignment parameters Rear wheel toe in 0.26 5′ Rear wheel camber -0.95° 0.5