This routine computes the standard toe, caster, and camber angles of a suspension with two ball joints. Scrub radius and kingpin inclination are also calculated.
Input:
REQ/id, FUNCTION = USER (1127,m3id,m4id,m6aid,m6bid,m7id,m10id,m9id,ms11id )
where:
| | Description |
|---|
m3id | = | id of MARKER at front UCA/LCA pivot (pt1/pt3) |
m4id | = | id of MARKER at rear UCA/LCA pivot (pt2/pt4) |
m6aid | = | id of MARKER at front upper/lower ball joint (pt7/pt40) |
m6bid | = | id of MARKER at rear upper/lower ball joint (pt17/pt6) |
mw7id | = | id of MARKER at opposite ball joint on wheel (pt6/pt7) |
m10id | = | id of MARKER at tire contact patch (pt10) |
m9id | = | id of MARKER at wheel center (pt9) |
ms11id | = | id of MARKER at spindle alignment point (pt11) on spindle |
Request File Output
Column Number Output :
1. Toe angle (deg)
2. Camber angle (deg)
3. Scrub radius in wheel plane (mm)
4. Caster trail in wheel plane (mm)
5. Caster angle (deg)
6. Kingpin inclination angle (deg)
Notes on Input and Output
This request can only be accessed for half or quarter vehicle suspension models. This REQUEST has the following sign convention:
Positive Toe: Toe in
Positive Camber: Top of tire out
This routine only supports two lower or two upper ball joints configuration, and not for a multilink configuration. This routine can be applied for two lower and two upper ball joints configuration, the 6th parameter (mw7id) needs to be passed as the id of MARKER at virtual upper (lower) ball joint.