Danfoss pved-cl, Operation Manual, Page: 79 / 116

Symbol Index Default Value range
db 4y05 50 0 to 250
Lx 4y06 0 -10 (max regressive), 0 (linear) to 10 (max progressive)
Qm 4y07 1000 0 to 1000 (100% flow at CR- or CL-port
Steering Sensitivity
Sensitivity is set individually for each program and can be either fixed or variable. Variability can depend
on vehicle speed, steered wheel position, or change of current device program. Using variable sensitivity
can increase comfort and drivability significantly, and depending on the vehicle type and use the
appropriate way to achieve the change might be different.
The PVED-CL allows several programs for each steering device, which means that 5 to 10 different
programs with different sensitivity settings can be made and applied via the MMI while driving. Each
program can then use either fixed or variable sensitivity – hence we talk ‘second-order-variability’ by
using the PVED-CL.
Min Sts = 20
0 100 200 300 400 500 600 700 800 900 1000
340
360
380
400
420
Vesm = 500
Vehicle speed
Ve = Vehicle speed: 1 unit = 0.1 km/h
Fixed sensitivity – program 0
Sts0 Sts1 Sts2
Sts3
Sts4 Sts5
Vehicle speed dependant
(non-linear) – program 2
Vehicle speed dependant
(non-linear) – program 3
Vehicle speed dependant
(linear) – program 1
Max Sts = 1200
Select a Fixed Sensitivity
A fixed steering sensitivity is chosen when no cylinder position or vehicle speed signal is available on the
vehicle.
Sse Selects between a fixed steering sensitivity, variable to steering actuator position or vehicle speed.
Set Sse to 1 to select the fixed sensitivity
Sts0 Sets a gradient between steering angle and requested port flow. Sts0 is normally set when max port
flow (defined by Qm) is achieved at maximum steering device input. This is calculated by the following
function.
Qm • 100
Sts = ________
1000-db
The default value is a gradient matching maximum requested port flow to maximum port flow at the
maximum steering angle.
Symbol Index Default Value range
Sse 4y09 1 Must be set at 1
Sts0 4y10 105 20 to 1200 (Amplification of 0.2 to 12.00)
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Steering by Low Priority Steering Device – Open Loop
© Danfoss | May 2016 11025583 | AQ00000216en-US0302 | 79