(Please contact Danfoss for further information.)
The advantage of having various valves that interfaces to the same valve actuator is a higher flexibility for
our customers needing different valve sizes and wanting to use the same valve actuator.
PVED-CL
The PVED-CL is a steering controller in the Danfoss valve actuator family. The steering controller is
designed to meet the functional requirements for steering - electro-hydraulically - any of-road vehicle by
following types of steering methods:
•
Steering with operator input via steering devices such as joystick, steering wheel sensor, mini-wheel
etc.
•
Automated steering with input from GPS, laser or row guidance controllers
The compact design of the PVED-CL reduce space, wiring, installation time, and provides the most
optimal location of any controller executing software to steer any vehicle. Especially when more than
with a one steering device is available in a vehicle or when closed-loop control is used, the advantage of
the controller being integrated in the valve becomes clear.
Steering Possibilities
Input Devices/Controllers
The PVED-CL allows up to four steering devices/controllers to be active in one system. For example:
Steering wheel and joystick steering in one system can both be connected to the PVED-CL.
The input steering device selection principle works as follows:
•
In case the operator wants to switch to a lower priority steering device / controller, the steering valve
must be in neutral (no steering) before it can switch to the requested steering device.
•
In case the operator wants to switch to a higher priority steering device/controller the switch will
happen instantaneously. This means that when several steering devices are operated, the input signal
of the steering device/controller with highest priority is always selected.
Programs
The PVED-CL provides, for each steering device, multiple separated set of control parameters (programs)
to leave the choice entirely up to the OEM’s to:
•
Select and program a control principle (open- or closed-loop) for each program for a particular
steering device
•
Select and program customized functionalities like variable steering ratio, ramp time, etc. for a
particular steering device.
Interface Overview
The PVED-CL provides the possibility for dynamic adjustment of the steering system by dynamically
applying a new set of control parameters from a program while driving. This allows the driver to optimize
the steering system to the working situation like; material handling, precision steering, fast driving and
anti jerk control for articulated steered vehicles. Up to 5 programs per steering device/controller (10 for
steering wheel sensor) are available. A man-machine interface (MMI) with a display with control buttons
provides means to request programs. The MMI transmits the specific commands via CAN bus.
Application Examples
Wheel Loader
The use of the PVED-CL on wheel loaders typically in conjunction with EHPS gives a range of functional
opportunities:
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
General Information
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©
Danfoss | May 2016
11025583 | AQ00000216en-US0302