Efficient load sensing with onboard electronics

Bosch Rexroth simplifies load sensing (LS) and flow management of hydraulic work functions with the modular RM Global valve platform. The flexible combination of RM10 and RM15 valve modules with a uniform flange pattern saves installation space and costs in many applications. Compared to the previous M4 series, internal leakage has been reduced by up to 20%. Reduced pressure losses and a maximum pressure of 420 bar reduce energy consumption and enable downsizing of cylinders and equipment. Machine manufacturers can achieve even greater precision and energy efficiency in conjunction with the eOC (electronic open circuit) electronic pump control.

With the RM Global modular valve platform for LS directional valves, Bosch Rexroth meets current market requirements for the flexibility, precision, reliability, and energy efficiency of mobile machinery. Applications that benefit from this include construction vehicles, drilling rigs, forestry machines, telehandlers, and mobile and truck-mounted loading cranes.

The further development of the LS and flow management system in the RM Global modular system, which can be flanged to the directional valve elements in a modular design, opens up a wide range of application scenarios. The uniform flange surface saves costs in engineering, purchasing, and parts logistics.

The expanded range of functions includes the Steering Priority driving safety function, which prioritizes steering over other hydraulic functions. Short-term power requirements of individual consumers can be met in stand-alone operation using the Flow Boost function.

In addition to the RM10 and RM15 valves, the RM Global platform currently includes an input element for the variable-displacement pump, a switching axis for pump shutdown including a safety function, and various end plates. Bosch Rexroth simplifies the configuration of the new LS directional valves with an online configurator that displays all components and options and provides the 3D model as well as the technical documentation.

The new EHS4 onboard electronics (OBE) offers a sensor resolution of 5 µm in 12-volt and 24-volt electrical systems. The OBE supports a wide range of communication protocols, such as CANopen and J1939.