CKwik240
Member
Disconnect the upper control arm ball joint from the spindle and tell me what resistance there is to the weight of a car? Aside from friction from the inner bushings, there is no resistance to the arm pivoting up and down. Hence there is no force that can be applied in the direction the arm swings.Your contention is not treated as evidence. Show evidence such as FEA proving your point. Otherwise stop arguing.
I'd love to do an FEA on this but my laptop with Solidworks on it has not been working for several months and I don't have the time or need to fix it. But frankly it's not something that couldn't be understood by comparing free body diagrams at 2 different suspension heights.
You linked to a MacPherson strut. It does not have an upper control arm as the top of the strut is a locating member of the suspension. The UCA of a double wishbone suspension is generally not loaded by the weight of the vehicle. It could certainly be designed to carry the weight on the UCA, but it would not package very neatly.Example:
[Retracted] Finite Element Structure Analysis of Automobile Suspension Control Arm Based on Neural Network Control
The control arm is an important transmission and guidance device in the Macpherson suspension system, which has an important impact on the ride comfort, operation stability, and safety of the vehicle, so it is necessary to study the structural performance of the control arm. In this paper, based...www.hindawi.com