Traction Control boosts efficiency of mobile machinery.

Press Release Summary:

Developed for hydrostatic travel drives, electrohydraulic Model ASR uses A4VG-type, electrically adjustable, variable-displacement axial-piston pump and 4 electrically adjustable, fully de-strokeable A6VE-type axial-piston motors. Electric signal for hydrostatic brakes is generated by LT07 brake pedal, which also controls dynamic multi-disk brake in GFT13/17 gearbox. System minimizes wheelspin and over-revving of drive of mobile machinery and converts remaining traction into tractive power.

Original Press Release:

New Traction Control Boosts Efficiency of Mobile Machinery

Greater driving stability and tractive power combined with lower mechanical stress on system components are the most important benefits of the new traction control (ASR). Bosch Rexroth AG specialists developed ASR specially for hydrostatic travel drives. The system also boosts the efficiency of mobile machinery through less wear on the surface and tires.

The electrohydraulic ASR is based on adjusting the components of a hydrostatic travel drive. It involves the use of an A4VG-type, electrically adjustable, variable-displacement axial-piston pump and four electrically adjustable, fully de-strokeable A6VE-type axial-piston motors of swash plate design. The electric signal for the hydrostatic brakes is generated by the LT07 brake pedal. At the same time the brake pedal hydraulically controls the dynamic multi-disk brake in the GFT13/17 gearbox. The entire control and regulation is effected in an electronic control device with sensor signal engine speed as the control variable for the drive.

In combination with the improved drive and braking management and the dynamic, safe service brake as per Section 41 German road traffic licensing regulations (STVZO) and 76/432/EEC, the travel drive permits top speeds of 40 kilometers per hour. The system, developed using modern simulation technology, reduces wheelspin and overreving of the drive of mobile machinery to a minimum and converts the remaining traction optimally into tractive power. Rexroth offers the gears for travel drives with integrated parking brake in its standard program which has now been expanded to include the low-maintenance dynamic multiple disk brake.

Rexroth at the Hanover Fair in Hall 23, Booth A20

Bosch Rexroth AG, a wholly owned subsidiary of Robert Bosch GmbH, achieved sales of approximately 4.1 billion Euro in 2004 with 26,400 employees. Under the brand name of Rexroth the company offers all relevant drive, control and motion technologies: from mechanics, hydraulics and pneumatics through to electronics and the associated services. The global player is a competent partner to around 500,000 customers in over 80 countries and an extensive supplier of components and systems for industrial and factory automation and mobile applications.

For product specific questions and reader inquiries:

Bosch Rexroth AG

Monika Licha

Glockeraustr. 2, 89275 Elchingen

Phone: +49 (0) 73 08 - 81 70 - 22 62

Fax: +49 (0) 73 08 - 82 - 26 83

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