Page 12 - BPW axles with air suspension Series O SL AL

BPW axles with air suspension

3.5 Cornering

Point at which trailer will over-balance:
(without considering effect of springs and weight
of unsprung masses proximity calculation)

F x SP
F Q = A
h x 2
S
Hanger bracket forces:

F F x h
A
F Ka = + Q e
2 FM
F A F x h e
Q
F Ki = -
2 FM
F Q
F StY =
2
F x L1
F StX = Q
FM

F = Centrifugal force at point of
Q
over-balance (N)
F Ka = Support force at bend outer side (N)
F Ki = Support force at bend inner side (N)
h S = Centre of gravity height above road
surface
h e = Centre of gravity height above trailing
arm eye
F StY = Lateral force on the hanger bracket
F = Longitudinal force on the hanger bracket
StX
F = Spring centre
M
S P = Track width

Example HSFALM 9010 30 K:

88290 x 2040
SP = 2040 mm F Q = = 45028 N
FM = 1300 mm 2000 x 2
88290
45028 x 1400
h S = 2000 mm F Ka = + = 92637 N
h e = 1400 mm 2 1300
88290
45028 x 1400
F Ki = - = -4347 N
2 1300
45028
F StY = = 22514 N
2
45028 x 500
F StX = = 17318 N
1300

12 BPW-EA-Luft 1023701e