Final Project

Roll Gradient

1) Firstly I determined some parameters like Roll Moment arm, Roll Moment, Total Roll stiffness with the given input parameters.

2) I calculate the Total lateral load transfer, lateral load transfer forum unsprung mass and also for sprung mass to determine the lateral load transfer due to roll.

3) With the lateral load transfer due to roll I could calculate the front and rear roll stiffness.

4) With considering the tyre isolation I calculate the a new roll stiffness at WC level.

5) After I determined the new roll stiffness I determine the ARB contribution.

6) To catch the ARB required value, I gave a certain outer diameter for the ARB(Solid axle İD=0).

7) Then I calculaten again the roll stiffness according to the real ARB stiffness value.

8) With the roll stiffnes I could calculate the Roll Gradient.

Understeer Gradient

1) I calculate the weight of each wheel

2) I estimate the understeer budget parameter alue according to the given load.

3) Finally I calculate each parameter and set these value on a 2 D chart tool.

Note: I used the same exceel tool which I used in the project 1. Please do not consider the pitch gradient (side view geometry). I just changed the values and add the understeer budget in my exceel tool.