PI 017-16 Lohr am Main, 2016-02-24

Positive Control combination reduces exhaust emissions

Economical changeover: The SMP12 control block and the A1VO axial piston pump can be integrated into existing fork lift truck designs with minimal cost and effort.

Bosch Rexroth develops tailor-made solutions for fork lift trucks up to six tons

The price war in the Asian fork lift truck market is especially intense and manufacturers are extremely cost sensitive. At the same time, however, governments around the world are currently tightening the permissible exhaust emissions for diesel engines and are vigilant about compliance. These newer limit values are hard to adhere to with existing concepts. This is why Bosch Rexroth designers have specially designed the economic SMP12 Positive Control control block for combustion engine fork lift trucks up to six tons. In combination with the A1VO axial piston pump, this significantly reduces diesel consumption and therefore exhaust emissions. With regards to functionality, installation space, weight and cost, it fulfills the typical requirements of Asian manufacturers, who are also increasingly targeting export markets.

This solution replaces the popular Open Center solutions with fixed pumps used on fork lift trucks with payloads of up to six tons. It is especially economical as manufacturers can lower consumption and therefore exhaust emissions with minimal cost and effort. Thanks to the significant reduction in the neutral circulation volume flow, it no longer has an influence on the energy balance and flow distribution. Due to this, the start of the cylinder movement can take place independently of the diesel engine speed. The combination of SMP12 and the A1VO variable pump lowers diesel consumption by up to 11 percent in comparison to fixed systems. Further reductions are possible through more comprehensive interventions in the hydraulic system.

Various fork lift truck manufacturers are already testing the new combination in test vehicles. This required only a small modification effort, as the compact SMP12 and A1VO can be integrated into the requirements of the existing machine concepts. The first test drives have confirmed the savings potential for consumption and exhaust emissions.

Rexroth offers the mechanically operated control block in both right and left-hand versions. With optional flow limitation of the lifting function, which also allows for a reduction in load sensitivity, a wide range of options are available to create a machine with the optimum in operating comfort. Even the application-relevant functions such as the ISO function, which prevents the working hydraulics from moving when the machine's functional concept requires it, and emergency manual lowering of the lifting function are already integrated as standard.

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 33,700 associates generated sales revenue of approximately 5.6 billion euros in 2014.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). According to preliminary figures, the company generated sales of more than 70 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. In 2015, Bosch applied for some 5,400 patents worldwide. 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.”

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Susanne Herzlieb
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-1573

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