Steering Sensitivity; Select A Fixed Sensitivity - Danfoss pved-cl Operation Manual

Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Steering by Low Priority Steering Device – Open Loop
Symbol Index
db 4y05
Lx 4y06
Qm 4y07

Steering Sensitivity

Select a Fixed Sensitivity

Symbol Index
Sse 4y09
Sts0 4y10
© Danfoss | May 2016
Default Value range
50 0 to 250
0 -10 (max regressive), 0 (linear) to 10 (max progressive)
1000 0 to 1000 (100% flow at CR- or CL-port
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.
Max Sts = 1200
420
400
380
360
340
Min Sts = 20
0 100 200
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.
Default
1
105
Vesm = 500
Vehicle speed dependant
(linear) – program 1
Vehicle speed dependant
(non-linear) – program 2
Fixed sensitivity – program 0
Vehicle speed dependant
(non-linear) – program 3
300 400 500 600 700
Ve = Vehicle speed: 1 unit = 0.1 km/h
Value range
Must be set at 1
20 to 1200 (Amplification of 0.2 to 12.00)
800 900 1000
Vehicle speed
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