The highly reliable hydrostatic fan drive from the Hydraulics technology group of Bosch Rexroth Corporation works in a wide range of ambient temperature conditions, from -40ºF to 212º F (-40º C to +100º C). Incorporating the new Rexroth F series pump and motor technology, the hydrostatic fan drives from Rexroth can be used in a variety of applications, including construction machines, agriculture and forestry vehicles, and road and rail vehicles. Hydrostatic fan drives dissipate heat transferred by engine coolant as it flows through the radiator. The cooling performance of a radiator is determined by the fan size, pitch of blades and fan speed. The controlled hydrostatic fan drive is superior to conventional mechanical and electrical systems in the following areas:
High flexibility with regard to the layout of the entire fan system
Fan runs only when required
Maximum fan speed not dependent on engine speed
Engine temperature is precisely controlled
Low hysteresis
Minimal loss of hydraulic energy
Gear motor offers compact design with integrated proportional control
Robust gear motor/pump design results in high reliability and efficiency For moderate fan outputs of up to 20kW, systems incorporating a hydraulic fixed displacement pump with bypass control represent the most economical solution. Fan speed automatically increases with an increase in engine temperature. The system automatically reverts to fail safe mode in the event of a control function failure, which means it runs at maximum fan speed.The Bosch Group is a leading global manufacturer of automotive and industrial technology, consumer goods, and building technology. In fiscal year 2004, some 242,000 associates generated sales of 40 billion euros. The Bosch Group today comprises a manufacturing, sales, and after-sales service network of some 260 subsidiaries and more than 10,000 service centers in over 130 countries.In North America, the Bosch Group manufactures and markets automotive original equipment and aftermarket products, industrial automation and mobile products, power tools and accessories, security technology, thermo technology, packaging equipment and household appliances. Bosch employs nearly 23,000 associates in more than 80 primary and 20 associated facilities throughout the region with reported sales of $7.8 billion in 2004. Under the industrial automation and mobile products segment, Bosch Rexroth Corporation is a wholly owned subsidiary of Robert Bosch GmbH. In the year 2004, Bosch Rexroth achieved sales of approximately $5.3 billion (4.1 billion Euros) with 26,400 employees worldwide. Under the brand name of Rexroth, the company offers all relevant drive, control and motion technologies: from mechanics, hydraulics and pneumatics to electronics and associated services. Rexroth has 500,000 customers in over 80 countries and is an extensive supplier of components and systems for industrial and factory automation and mobile applications. For more information, visit www.boschrexroth-us.com.
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