Steering By Steering Wheel - Open Loop; Acquire The Signals; Functionality Tree; Open Loop Control - Danfoss pved-cl Operation Manual

Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Steering by Steering Wheel – Open Loop
Steering by Steering Wheel – Open Loop

Functionality Tree

Open Loop Control

© Danfoss | May 2016
EHPS Type 2 System Diagram
Joystick or mini wheel
OSP
OSP
PVE
EHPS valve
PVE EHPS Valve
Automatic steering
Vehicle speed

Acquire the Signals

See Mapping a Steering Device
angle sensor.
The tree below illustrates the functionality available in the PVED-CL for open-loop steering wheel
steering. The manufacturing default is found by following the red line. Following the instructions in this
chapter can of course modify it. The switches in the tree are used to select the functionality required. In
case different functionalities are required, the EHPS software provides multiple programs for each
steering device.
*
switches Cp Sse
Related to
position of
steering actuator
Related to
vehicle speed
Open loop
Cp=0
No signal (0)
Closed loop
Cp=255
CAN (255)
default
* Sensitivity means: number of revolutions on steering wheel from lock to lock
Open loop steering shall be chosen for implementing variable steering ratio or when sideward forces on
articulated steered vehicles must be actively reduced.
Steering angle sensor
Q
Q
Steering
Steering
cylinder
cylinder
Position sensor
P005 225E
on page 31 on how to map the steering wheel sensor and steering wheel
Sr
Open loop, fixed sensitivity, with fixed ramp times,
Fixed
Sr=1
Var Open loop, fixed sensitivity, with variable ramp
Sr=2 times as function to vehicle speed,
No,
Open loop, fixed sensitivity, with no ramps
Sr=0
Fixed applied.
Sse=1
Open loop, sensitivity related to steering actuator
Fixed
position, with fixed ramp times
Sr=1
Open loop, sensitivity as function to steering actuator
Var
position, with variable ramp times related to vehicle
Sr=2
speed,
Sse=2
No,
Open loop, sensitivity related to steering actuator
Sr=0
position, no ramps applied
Open loop, sensitivity related to vehicle speed,
Sse=3
Fixed with fixed ramp times
Sr=1
Open loop, sensitivity related to vehicle speed,
Var
Sr=2 with ramp times related to vehicle speed
No,
Open loop, sensitivity related to vehicle speed,
Sr=0
no ramp times applied
Fixed
Closed loop, fixed sensitivity
Sse=1
Related to
Closed loop, sensitivity related to vehicle speed,
vehicle speed
Sse=3
Program number: Y
4
3
2
1
Y=0
P005 202E
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