Position of rack end / tie rod pivot points
Position of rack end / tie rod pivot points
(OP)
Hi everyone!
I'm working on an RWD offroad vehicle with a suspension travel of 150mm. The suspension design (double wishbone) gives me a roll center position which is on the outside of the car (distance between upper & lower control arm pivots on the chassis is bigger than distance between the upper and lower ball joint centers on the wheel). The spread angle is about 9deg. The position of the linking point between steering arm & tie rod is also given (Ackermann geometry). I think that the problem is the different length of the control arms (lower 530mm, upper 330mm). Is it possible two find a correct tie rod length = position of the linking point rack end-tie rod?
Where can I find informations about this suspension geometry problem? I have to reduce the bump steer, actually the toe in is about 7deg!!!
Thanks!
I'm working on an RWD offroad vehicle with a suspension travel of 150mm. The suspension design (double wishbone) gives me a roll center position which is on the outside of the car (distance between upper & lower control arm pivots on the chassis is bigger than distance between the upper and lower ball joint centers on the wheel). The spread angle is about 9deg. The position of the linking point between steering arm & tie rod is also given (Ackermann geometry). I think that the problem is the different length of the control arms (lower 530mm, upper 330mm). Is it possible two find a correct tie rod length = position of the linking point rack end-tie rod?
Where can I find informations about this suspension geometry problem? I have to reduce the bump steer, actually the toe in is about 7deg!!!
Thanks!





RE: Position of rack end / tie rod pivot points
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Position of rack end / tie rod pivot points
Damien
RE: Position of rack end / tie rod pivot points
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Position of rack end / tie rod pivot points
Norm