Why does the vehicle model tend to leave the plane while straight line braking ?

draucis

Hello,

I was thinking that when we run a straight-line braking analysis on a vehicle whether a two-wheeler or a four-wheeler why does the vehicle tend to leave the plane when already the event has a steering lock feature inbuilt ? Is there any type of lateral force acting on the vehicle and is there any way we can stop it from happening in the two-wheeler model? 

Regards 

Draucis 

Praful

Hello Draucis

Lateral forces are induced when the wheel has a net toe or camber. Apart from the steering that is controlled by the driver, the change in toe/camber is effected by difference in weight distribution between left and right in 4 wheeler and out of plane CG in two-wheeler, which is generally always the case in reality.

In your model, you may want to check the total CG and see if it is lying in the vertical plane passing through the front and rear patch, if that was your intent.

Hope this helps.

Regards

Praful

Praful

Hello Draucis

Lateral forces are induced when the wheel has a net toe or camber. Apart from the steering that is controlled by the driver, the change in toe/camber is effected by difference in weight distribution between left and right in 4 wheeler and out of plane CG in two-wheeler, which is generally always the case in reality.

In your model, you may want to check the total CG and see if it is lying in the vertical plane passing through the front and rear patch, if that was your intent.

Hope this helps.

Regards

Praful

draucis

Thank You so much, Praful this is such a common point to think about. I took the coordinates symmetrically when defining component coordinates and assumed everything is symmetrical, never checked the overall CG location. 

Thanks again

Draucis