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BODAS – Intelligent Electronics for Mobile Hydraulics
Excavator With Load Limiting Control LLC
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Lift the filled bucket, extend the boom and slew the superstructure, all at 40 °C/100 °F in the shade? That’s a lot to ask of a diesel engine and hydraulic system. It’s just as well that the load limiting control ensures an intelligent power distribution between the diesel engine and the hydraulics. The electronics protect the diesel engine against overload and reduce fuel consumption, emissions and wear. They also make it easier to operate the excavator.
The BODAS controller monitors the current operating status of the diesel engine, either by means of speed and angle of rotation sensors or directly, via CAN bus data. In the event of a potential overload, for example due to too great a divergence between the rated speed and the actual speed or too high a cooling water temperature, the electronics automatically reduce the power consumption of the coordinated Rexroth hydraulic pumps. This ensures that the diesel engine is always within the optimum operating range.
The BODAS software module also has an auto-idle function, which automatically reduces the speed - and hence the fuel consumption - if the engine is under light load for any length of time. Various mode shifts offer a choice between precision control, e.g. for sewage pipe installation, and dynamic loading and unloading. That’s enough to make any excavator driver happy.
Hardware in this example
Controller: RC2-2
Speed sensor: ID
Pressure sensor: DS
Angle sensor: WS
Coordinated hydraulics: A8VO.LA or A11VO.LE
Software package in this example
Load limiting control: LLC
Relevant links for BODAS
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