Marginal Column



VBO Virtual Bleed Off

The outstanding features of a standard open center system are full-flow open center as well as the resulting load sensitivity. Specially developed VBO software and an electrically pressure-regulated pump are used to electronically reproduce the standard OC system with no energy loss. The electronic conversion of VBO takes place in a 2-circuit system using the pressure-regulated pump with angle sensor and a closed center M9 control block, actuated with EHbasic.

In VBO the flow rate, but also especially the pressure rise are specified by the software. This enables new matching concepts between the hydraulic system and diesel engine in TIER 4 diesel engines. Using the electrically pressure-regulated pump the maximum system pressure as well as individual consumer pressure can be safeguarded using variable pressure cut-off with no addition of components.