User Manual

2/16 Bosch Rexroth AG Mobile Hydraulics
Dual Path Control DPC
RE 95 325/03.04
Ordering Information
The application software AS/DPC must only be used with the
control unit RC6-9/20 and other add-on components (variant A
see page 7, variant B/C see page 16). When ordering, link the
ordering codes of hardware and software with a "+" symbol.
For example: RC6-9/20+AS/DPCA10
Note
You can find a description of variant B/C on page 7.
Variant DPCA
The electronic dual path control system DPCA allows you to
control the driving and steering behavior of hydraulic dual path
drives of tracked vehicles.
The electronic dual path control system is designed to actuate
two variable displacement pumps and two variable displace-
ment motors in a closed circuit.
Control is based on the following hydraulic configuration:
• Two variable displacement pumps A4VG or A10VG with
electro-proportional (EP) control, combined with two variable
displacement motors A6VM, A6VE or A10VM with electro-
proportional (EP) control
The following diesel engine configuration can be used:
• Diesel engine with or without CAN bus interface
The dual path control system receives the actual speed
from a speed sensor and the set speed from the throttle
potentiometer. The DPCA variant does not evaluate the CAN
bus.
Functional Description
The swivel angles of two hydraulic variable displacement
pumps and two hydraulic variable displacement motors in the
closed circuit with electro-proportional control are varied in
order to control the driving and steering behavior.
One pump and one motor are assigned to each side of the ve
-
hicle. Steering is achieved by controlling the pumps differently.
The output torque depends on the swivel angle of the motors.
At the minimum swivel angle, the speed is highest and the
output torque is lowest.
A synchronization control and a load limiting control are avail
-
able for controlling the driving and steering behavior.
In addition, the travel behavior can be monitored to increase
safety and drive comfort.
Assignment Setpoint
A two-axis joystick is used to define the direction and speed of
travel and the steering direction.
Setting is carried out redundantly:
• electronically with an analog value
• and in parallel via the CAN bus
The dual path control system checks to ensure that the values
correspond. If there is too great a difference between the
analog value and the value sent via the CAN bus, an error mes
-
sage appears.
Ordering Code
AS/ DPC 10
Type
Application software AS/
Software
Dual path control DPC
Variant A
Use with tracked vehicles:
Controlled via joystick, with load limiting control A
Variant B
Used with paver:
Controlled via lever, with manual or automatic steering B
Variant C
Used with paver: Controlled via lever,
with manual steering, with control of additional drives C
Version
10