User Manual

12/20 Bosch Rexroth AG
DRC Travel Drive Control
RE 95 320/06.06
Functional description
Automotive travel
The hydrostatic drive with travel drive control facilitates com-
fortable driving, such as that experienced in an automobile. The
variable pump is controlled by the defl ection of the acceleration
pedal. The variable motor follows after the pump is fully swiv-
eled out.
DRCD
The travel behavior of the DRCD drive control is load de-
pendent, as with all cars or trucks. With increasing load, the
vehicle slows or becomes sluggish. Examples here include be-
ginning to climb after traveling on a fl at stretch or the difference
between a loaded and an empty vehicle. The load dependence
has the advantage that the driver has a better feel for the driv-
ing status and conditions.
DRCE
The travel behavior of the DRCE drive control is load indepen-
dent if suffi cient drive power is present. It is therefore particu-
larly well suited for applications in which it is important that
fi xed speeds be maintained.
Inch function
A potentiometer can be used to infi nitely limit the pump and,
therefore, the fl ow from the pump. Thus, the vehicle speed can
be decoupled from the diesel engine speed.
As a result, the vehicle can be driven slowly while at the same
time maintaining maximum diesel speed to provide maximum
fl ow for the working hydraulics.
The inch function can be activated or deactivated via param-
eters.
Power
supply
Ignition lock
RC4-4 controller
with DRCD and DRCE
software
BODEM
PC software
RS232
Diagnostics socket
Speed limiting
Accel. pedal
Temperature of diesel engine via CAN
Diesel engine speed via speed sensor or via CAN
Engine Variable pump A4VG...DE/EV/EP
or A10VG...DE/EP
Variable motor A6VM...EP or
fi xed displacement motor A2FM
or A2FE, or A4FM
or A10FM
Speed sensor
Inch pedal Speed limiting Inch pedal Travel direction Teach function
Special function
Seat switch
Special function
Figure 6: Typical configuration for the DRC travel drive control, variants D-E (DRCD and DRCE)