Roll Steer, Caster, and Camber

Branch ID: 190 Request Number: 50000190

Table 1.
Component Unit Comment
1 (X): Left Wheel Roll Steer % (deg/100 deg) The left wheel steer angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

roll steer = (C(6,3) - C(6,9))*track/deltaz*100
2 (Y): Left Roll Caster % (deg/100 deg) The left caster angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:
roll caster = (C(5,3)-C(5,9))*track/deltaz*100
Orientation B:
roll caster = (-C(5,3)+C(5,9))*track/deltaz*100
3 (Z): Left Wheel Roll Camber % (deg/100 deg) The left wheel camber angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:
roll camber = -(-C(4,3)+C(4,9))*track/deltaz*100
Orientation B:
roll camber = (-C(4,3)+C(4,9))*track/deltaz*100
4 (RX): Right Wheel Roll Steer % (deg/100 deg) The right wheel steer angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

roll steer = (C(12,3) - C(12,9))*track/deltaz*100
5 (RY): Right Roll Caster % (deg/100 deg) The right caster angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:
roll caster = -(C(11,3)-C(11,9))*track/deltaz*100
Orientation B:
roll caster = (C(11,3)-C(11,9))*track/deltaz*100
6 (RZ): Right Wheel Roll Camber % (deg/100 deg) The right wheel camber angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:
roll camber = -(-C(10,3)+C(10,9))*track/deltaz*100
Orientation B:
roll camber = (-C(10,3)+C(10,9))*track/deltaz*100