PI 042-17 Lohr am Main, 2017-09-06

The next generation of tractor hydraulics: e-Load-Sensing from Bosch Rexroth

Rexroth e-Load-Sensing simplifies operation for highest productivity

Electronic signal processing optimizes interaction between the tractor and attachments

With e-Load-Sensing (e-LS), Bosch Rexroth proudly presents the next generation of hydraulic systems. The electronically controlled system makes the comprehensive management of the tractor and various attachments possible. It also supports new functions for automated, monitored workflows and simplified operation. Tractor manufacturers can therefore reduce their development and installation work by transferring previously hydromechanical functions to the software. Electronification opens up additional opportunities for increasing the availability of tractors through innovative services.

Rexroth's scalable e-Load-Sensing system solution consists of the new SBx4 family of valves, pressure sensors, an electronic RC control unit and an electrically controlled variable pump. Rexroth e-LS replaces the hydraulic load-sensing signaling circuit with an electronic closed loop control. All the components simultaneously signal their demand to the control unit. Tractor manufacturers can adapt the system parameters individually using software and dynamically vary them depending on the operating situation.

They can also align the tractor and attachments so that they recognize one another automatically and the system retrieves predefined parameters, which substantially simplifies operation. This helps farmers to obtain maximum results. In addition, when attachments are connected Rexroth e-LS compensates for line losses in the system. The reduced power dissipation in standby mode and the variable excess pressure increase energy efficiency further.

What's more, Rexroth e-LS makes it possible for the first time to flexibly adjust the maximum pressure during operation to suit individual attachments and functions. For example, in order to avoid damaging silage bales through over-compression in the bale gripper, manufacturers can limit the pressure of the bale gripper. When it is actuated, the system only permits the preset maximum pressure and the compressive force of the gripper is hydraulically limited. For short power boosts, for example breakaway force for a front loader, the pressure can be overridden to suit the situation.

In preparation for future, cloud-based services offered by tractor manufacturers, Rexroth e-LS makes operating data available over the entire life cycle, which can also be wirelessly transmitted to specifically designated points. The comprehensive electronic pressure, flow and temperature data enable fast, accurate and cost-effective diagnosis of the hydraulic system without the need for calling in a mechanic to work on the tractor. The data can be read out both at the machine itself or online. Thanks to new services, manufacturers can recognize wear on components before they cause a failure. They initiate preventive maintenance measures and thus prevent expensive downtime in the field. On top of this, manufacturers can install software updates on the system "over the air" and thus keep the vehicles fully up to date.

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, and Factory Automation to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, more than 29,500 associates generated sales revenue of approximately 5 billion euros in 2016.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 390,000 associates worldwide (as of December 31, 2016). The company generated sales of 73.1 billion euros in 2016. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT company, Bosch offers innovative solutions for smart homes, smart cities, connected mobility, and connected manufacturing. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers nearly every country in the world. The basis for the company’s future growth is its innovative strength. At 120 locations across the globe, Bosch employs some 59,000 associates in research and development.

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Manuela Kessler
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-4145

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