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Bosch Rexroth’s high-efficiency traction control (HET) is an
all-hydraulic system that automatically switches between
two- and four-wheel drive, as required by ground conditions.
Oil as required
Bosch Rexroth meanwhile used Bauma to unveil some
innovations of its own. It launched a new component and
software package it said could reduce the fuel consumption in
excavators by up to -20% without compromising performance.
The company’s new Virtual Bleed Off (VBO) system works by
determining the volume of hydraulic oil needed for a particular
function using sensors and using this information to control the
pump.
Rexroth said this led to better response and greater efficiency, as
well as safeguarding against high pressures.
Doosan has already adopted VBO for its DX340LC-3 and
DX380LC-3 Stage IIIB compliant crawler excavators, where it
is branded as D-Ecopower technology. A +26% improvement
in productivity and up to 12% in fuel savings is being claimed
for the electronic pressure-controlled pump and closed centre
hydraulic system, depending on the mode selected.
Rexroth has also launched an automatic stop-start system for
construction machinery, which it says is an industry first. This
concept, which is common in the automotive industry, works on
the principle that fuel is saved by turning off the engine in idle
periods. It uses a hydraulic flywheel in its system, which allows
hydraulic functions to start up immediately, before the engine
comes back on. This system can also provide a boost function
during normal work.
Another innovation is the company’s high-efficiency traction
control (HET) for wheeled machines, switches automatically
from two-wheel to all-wheel drive. It is a compact design and
can be installed without any electronics, which should make it
relatively easy for designers to incorporate.
The heart of the system is a valve block, which feeds power
to the second axle, should sensors indicate the main drive axle
is starting to slip. In fact, the action of a wheel slipping frees
Oerlikon Graziano’s Shifting Solutions will allow it to
provide complete transmission competencies.
The principle is simple – the sooner you
contact us, the more effective the solution.
Customised hydraulic solutions from HAWE: efficient, reliable, flexible.
SOLUT IONS FOR A WORLD UNDER PRESSURE .
.DE
