Ride rate is defined as vertical force per unit vertical displacement of the tire ground contact with respect to chasis.

Roll rate is defined as torque resisting body roll per degree of body roll.

Assumption made in calculation.

- 0 degree camber change with ride
- no tire lateral distortion.
- steady state cornering ie without longitudinal acceleration.

1. A_{α} (horizontal acceleration) = V^{2} / Rg

V = velocity of vehicle

R = Radius of turn

2. A_{y} = Lateral acceleration in car axis system = A_{α} cos α — sin α

As F_{Y} = -F_{α} cos α + W sin α (from above fig)

3. Effective weight of the car due to banking is

W’ = W.A_{y}

4. Effective front and rear axle weight are.

W’_{F} = W’ (b / l)

W’_{R} = W’ (a / l)

a and b are cg location calculation for location of centre of gravity.

Continue…….

can anybody help me……for how to calculate wheel travel…..?

You have to select it by own

we have calculated the spring stiffness but are not getting how to calculate the ride rate and the roll rates can anyone help?

we have calculated the spring stiffness but are not getting how to calculate the ride rate and the roll rates can anyone help?

good job