xxx 2011-03-22

Rexroth highlights latest advances in hydraulics technology at CONEXPO 2011

Bosch Rexroth exhibits the newest developments in hydraulics technology, including BlueHydraulics, Diesel Hydraulic Control, Green Valves, Hydromechanical Variable Transmission and more in booth 13115 at the CONEXPO/IFPE show, March 22-26 in Las Vegas.

Visitors to the Rexroth booth can expect to see a broad range of leading hydraulics technology used in loaders, cranes, telehandlers, excavators and other mobile equipment. The company will display several notable products and systems designed to improve energy efficiency, lower equipment and operational costs, enhance productivity, and reduce environmental impact.

Rexroth BlueHydraulics program

Machine manufacturers and end users are beginning to focus on lowering energy consumption and exhaust emissions while maintaining the same performance levels as before. Rexroth’s expertise in the area of hydraulic drive technology responds to these demands directly and effectively with the wide array of products and solutions included in its BlueHydraulics program, such as intelligent controls, optimized components and systems for energy recovery. The Rexroth BlueHydraulics program enables OEMs to continue using the compact hydraulic solutions they have grown accustomed to in order to save energy, increase efficiency and, above all, reduce exhaust emissions to TIER 4 final-compliant levels.

DHC – Diesel Hydraulic Control

Part of the BlueHydraulics program, Rexroth’s Diesel Hydraulic Control (DHC) combines engine management with drive and working hydraulics control, thus reducing diesel fuel consumption by up to 20 percent. Working together with the diesel engine specialists from Bosch, the world’s largest automotive supplier, Rexroth has developed a new control strategy which retains the accustomed lively response of the travel drive and implement hydraulics even under conditions of diminished load response and lower engine speeds. DHC continuously determines the demands of the travel drive and implements hydraulics and uses this information to dynamically calculate the optimal operating points for the diesel engine and hydraulic components by means of the DHC system map, making it possible to operate the equipment at the accustomed dynamic response levels in spite of lower engine speeds, thereby saving fuel.

HVT - Hydromechanical Variable Transmission

The Hydromechanical Variable Transmission (HVT) system helps reduce fuel consumption by more than 20 percent compared to vehicles equipped with a conventional torque converter transmission. Developed through a cooperative effort between Bosch Rexroth and Dana, the HVT is targeted for front-end loaders, graders, forestry skidders and other off-highway applications in the 115-360 horsepower range (90-270 kW). Designed to improve productivity on vehicles using downsized engines, the HVT enables precise vehicle positioning and stepless drive with uninterrupted acceleration. Occupying the same space requirements of a conventional torque converter transmission, the HVT optimizes the operating point of the diesel engine by decoupling engine speed from drive speed.

"Green" valves

Rexroth introduces a new concept in load-holding and lowering valves to make mobile lifting equipment more energy efficient and easier to control. Engineered to replace traditional counterbalance valves in equipment such as cranes, Rexroth’s patent-pending Green Valve design allows the use of gravity to help lower a loaded or unloaded structure, while at the same time providing increased stability and smoother start and stop of motion. In addition, Green Valve technology greatly reduces pump flow to the boom when lowering, making more flow available for faster execution of simultaneous movements and reducing machine cycle times for better overall performance. By drastically reducing the energy demand on the diesel engine when lowering the boom, these new load-holding valves can provide significant fuel savings and help in meeting emission standards.

Additional mobile hydraulics technology

Rexroth will also have displays representing filtration solutions, cartridge valves, variable and fixed pumps, hydrostatic fan drives, directional valves, traction control, special motors from its Hägglunds group, and more.

Visit Bosch Rexroth at CONEXPO in the South Hall, booth 13115.

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the brand name of Rexroth, the company supplies more than 500,000 customers with tailored solutions for driving, controlling and moving. Bosch Rexroth is a partner for industrial applications and factory automation, mobile applications and renewable energy. As The Drive & Control Company, Bosch Rexroth develops, produces and sells components and systems in more than 80 countries. In 2009 Bosch Rexroth, part of the Bosch Group, achieved sales of around $5.7 billion (4.1 billion Euro) with 34,200 employees. For more information, please visit:


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