Sauer-Danfoss’ OSPE Electrohydraulic Steering Unit

NORDBORG, Denmark – Sauer-Danfoss’ (NYSE:SHS) new OSPE electrohydraulic steering unit incorporates a range of innovative features designed to meet stringent new safety legislation. Featuring proven OSP steering technology and an integrated electrohydraulic steering valve, the OSPE steering unit helps simplify hydraulic system architecture. The high level of integration minimizes the need for additional components and provides OEMs with a complete package – designed, developed, and tested for optimal performance. With a ‘safe state’, selectable reactive and non-reactive steering modes, Load Sensing and Open Center options, and variable steering ratio, the OSPE is the ideal choice for demanding off-highway applications. 

A ‘Safe State’ for Your System

To comply with revised safety legislation and new standards, such as ISO 25119, the OSPE steering unit offers a defined ‘safe state’. In the event of an electronic or hydraulic system malfunction, this option, activated by an external watchdog controller, can isolate the electrohydraulic section of the steering valve in order to protect the steering system. Another safety feature ensures that, in electrohydraulic steering (non-reactive) mode, the steering ports from the OSP will not be blocked. This is achieved with an extra connection from the hydrostatic steering unit to the cylinder. In contrast to other systems, this keeps the steering wheel fully operational and the driver in complete control.

Selectable Reactive and Non-reactive Steering

Whether driving on- or off-road, selectable reactive and non-reactive steering modes ensure that your vehicle will steer with a firm, automotive feel due to the OSPE’s ability to automatically return to center. With two steering modes, the OSPE also enables reaction steering on vehicles with an auto-steering function. Furthermore, second generation “reaction” technology, RM (Reaction Motoring), is available in Load Sensing or Open Center. RM technology significantly improves the self-centering effect of the steering system, which increases vehicle stability at high speeds and provides additional operator comfort.

‘Quick Steering’ – No Compromise  

In combination with Sauer-Danfoss’ PVED-CL digital actuator and SASA steering sensor, the OSPE enables vehicle operators to fine-tune steering performance. The PVED-CL digital actuator incorporates steering software optimized for tractors and articulated vehicles, while the SASA steering sensor detects the absolute position and speed of the steering wheel. With this system, the operator can adjust the number of times the steering wheel is turned, from stop-to-stop, in order to adapt steering performance to suit specific working requirements or on-road driving conditions. It is also possible to adjust the steering ratio automatically, dependent on the speed of the vehicle. The result is a complete solution that not only provides additional flexibility in vehicle system design, but also helps improve productivity and reduce work-related fatigue.

Sauer-Danfoss Inc
www.sauer-danfoss.com

::Design World::

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Filed Under: Automotive, Electronics • electrical, Hydraulic equipment + components, Safety systems + components

 

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