102 | © Danfoss | August 2018 AQ00000211
The anti-drift correction portion is calculated by looking at the difference, in degrees, measured at the steering wheel and
the actual position of the wheels. The percentage of the full flow, which PVED-CLS’s anti-drift algorithm will add is
defined by the following four points, Point A to Point D, where Point B and Point C are configurable.
• Point A (0, 0)
• Point B (P3706, P3705)
• Point C (160, P3705)
• Point D (0, 0)
Figure 51
The range is from 1° to 160° for P3706, in steps of 1°. For P3705 the range goes from 0% to 100% in steps of 1%.
The values recommended by Danfoss are P3706 set to 20 and P3705 set to 15 i.e. anti-drift will be enabled all the time
and 15% of the full flow will be added or deducted depending on direction, to the calculated ideal ccm per revolution-
output, when the difference between the measured steering wheel position and the actual position of the wheels is 20° -
160° (due to Point B and Point C’s coordinates). When steering wheel angle difference is > 160° linear interpolation
between Point C and the fixed point D, will determine the anti-drift correction portion.
Furthermore, anti-drift function will also improve consistency in lock-to-lock on steering wheel.
Point A
Point B
Point C
Point D
0
5
10
15
20
25
30
35
40
45
50
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
Anti-
drift correction [% of max flow]
|Mini-steering wheel angle difference [degrees]|
AUX - Open Loop Mini Wheel Anti-drift (EFU)
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