H1 hydrostatic pump: design builds in reliability

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Third Quarter 2007 Other technologies

H1, Sauer Danfoss’ new generation of servo-controlled hydrostatic pumps, is built around an advanced electrical control and available in a wide range of displacements. It is designed for quality and reliability and offers expanded functionality, greater total efficiency, and easy installation.

The H1 axial piston pump from Sauer Danfoss

These pumps are designed for use in a wide range of mobile machinery applications, including combines, road rollers, tele-handlers and skid steer loaders.

Because the same overall design concept is used for the entire H1 displacement range, vehicle manufacturers can benefit through enhanced product reliability and greater design freedom.

This pump line also uses the same kind of electrical control for the entire family - a feature that improves overall product reliability.

As a result of new manufacturing techniques, the number of parts in these pumps has been reduced significantly. For example, the swash plate is forged out of a single piece of steel and the integrated electrical displacement control (EDC) has a reduced number of parts. The reduced part count has quality and reliability benefits.

Short length is another distinctive feature of the H1 pump line. For the OEM, this means greater design freedom and easier installation. To enhance this design freedom and further reduce overall installation time, the pumps are designed with a minimum one clean side.

For ease of installation and maintenance, all pumps in this series use the same type of electrical connector interface, standardised hydraulic connector ports and all pump access ports are located on the same side.

There are three electronic control options: electrical displacement control for load independent speed capability, non-feedback proportional electric control for automotive performance, and FNR (forward/neutral/reverse) for simple on/off work function control.

The automotive control functions integrated in H1 pumps are designed with CAN-Bus connections for expanded vehicle functionality.

The entire H1 range is PLUS+1 compliant. Designed to work together, H1 pumps and PLUS+1 microcontrollers are easy to connect and install. For instance, the electrical displacement control (EDC) in the H1 pump range is PLUS+1 compliant, simplifying vehicle system design for the OEM.

Integrated in the driveline control architecture, the PLUS+1 micro-controller eliminates the need for external mechanical or hydraulic controls and gives improved configuration flexibility when setting parameters for speed and acceleration, etc.

Thus, PLUS+1 allows users to rapidly develop and customise electronic machine control. It opens up the future by combining machine controls and diagnostics in an integrated operating network. The system connects the interactive control of different machine components, for example valves, motors, joysticks, inverters, sensors, and - of course - H1 pumps.

Combined, the H1 family and PLUS+1 system form a genuinely intelligent liaison resulting in plug and perform benefits and reduced total system costs.

For more information contact Ron Sheehan, Sauer-Danfoss, +27 (0)11 803 8390, [email protected], www.sauer-danfoss.com

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H1 hydrostatic pump: design builds in reliability

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