Truck & Off-Highway Engineering - December 2023 - 5

TECHNICAL INNOVATIONS
For machine optimization, the eOC
pumps offer Sampierana a wide range
of hydromechanical control functions
and mechanical interfaces. They are all
transferred directly to the control software,
which provides Eurocomach engineers
with the following control modes:
Pressure or delta pressure control, flow
rate and swivel angle control, and
torque control. All three control modes
each have a predefined set of parameters
for optimal behavior of the eOC
pump in the hydraulic system, such as
load sensing.
Since the BODAS eOC software continuously
adapts the hydraulic power to
the available engine torque and also
compensates for disturbances in the
load cycles of the machine, highly dynamic
and precise work functions become
possible. The overall productivity
of the working machine increases while
the energy consumption of the entire
hydraulic system decreases in favor of
fuel consumption and battery usage.
Flow sharing: compact and
scalable
In its first project, Sampierana used the
eOC architecture to develop the 60ZT
and 65TR mini excavators. While the
60ZT has a zero-radius profile with a
monolithic boom, the 65TR is
equipped with a triple boom, which is
particularly suitable for digging, handling
and loading operations thanks to
its small radius. Both models have benefited
from the eOC architecture. While
the low-noise axial piston variable disThe
eOC architecture from Bosch Rexroth features an electrohydraulic axial piston pump as its
central component, operating in an open circuit with a swivel angle sensor and pressure sensors.
placement pump type A10VO realizes
precise performance control, the compact
RS12/EH control block ensures
flow sharing (LUDV) and, with low
pressure losses, in turn contributes to
equally high-performance and energyefficient
working hydraulics.
Together with the open and scalable
BODAS eOC pump control RC5-6/40
and the BODAS eOC software, the productivity
of the machine can be specifically
optimized, with the operator interacting
directly with the machine's electronics
via joystick and onboard display.
Situation-dependent modification of
The electrohydraulic
pressure and
volume flow
software (EHpQ)
controls the
volume flow and
the pressure
independently
of each other,
allowing machine
parameters to be
adjusted according
to operating mode
and operator
preference.
TRUCK & OFF-HIGHWAY ENGINEERING
functional parameters such as delta-P,
pressure gradient or volume flow allow
the mini excavators to work slowly and
precisely on the construction site or
move larger volumes at a rapid pace.
" Since all control functions are transferred
from the hydromechanical controller
to the software, the entire range
of functions and variability of the
pumps is available to our customers, "
said Simon Dreher, sales and industry
management for mining excavators and
construction machinery. In addition, the
scalable solution allows manufacturers
a step-by-step implementation, according
to the Rexroth expert. For example,
manufacturers can start with the electrohydraulic
eOC pump and then expand
the solution to the electrohydraulic
main control block or the entire hydraulic
system. Depending on requirements,
the implementation can be realized
with hard-coded individual parameters
as well as with a whole range of
adjustable digital CAN bus parameters.
More functionality, less fuel
With the help of the eOC BODAS pump
control, Sampierana has managed to
increase the range of working modes
and tools while increasing machine
December 2023 5
BOTH IMAGES: BOSCH REXROTH
Truck & Off-Highway Engineering - December 2023

Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - December 2023
