Sauer-Danfoss optimizes valve efficiency, updates software

  • 04-Jun-2012 04:32 EDT
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Sauer-Danfoss' new PVG 100 High-Flow post-compensated valve raises port flows with less work—pump margin of 15 bar (217 psi)—and lowers the return pressures, suitable for increased demands for high efficiency and high-flow solutions.

Sauer-Danfoss says its new space-saving PVG 100 High-Flow valve option offers high hydraulic flow and reduced system costs to heavy-duty work functions on construction, agriculture, and forestry machinery. The company emphasizes that the valve is particularly useful for OEMs "in the face of today’s tough Tier 4 and Stage IV emissions requirements."

Extending the range of post-compensated, flow-sharing PVG valves, the PVG 100 boosts flow capacity by 30% without sacrificing efficiency. S-D says that capability enables the workflow of a 180-L/min valve to be easily raised to 240 L/min. Pressure drop and energy consumption are minimized, while high overall system efficiency is maintained.

“If there is only one high-flow function on a machine, manufacturers may be forced to use a bigger valve for other functions with lower flow requirements, because the size of the valve is determined by the highest flow," said Gerry Prendergast, PVG Sales Manager. "With PVG 100, this is no longer necessary. We can place our high-flow option right where it’s needed.”

Key features include the specially designed spool and tank galleries. Another is the compact size compared to other commercial valves with similar flow capacity.

“Size is important on a Tier 4-compatible machine," said Prendergast. "Engines take up more space due to the aftertreatment of exhaust gasses, leaving less space for components. The PVG 100 High-Flow is one of the absolute smallest on the market.”

S-D says the new option is a significant enhancement of the smart, modular PVG 100 valve, which can be combined with the popular PVG 32. With its load-independent flow control, the PVG 100 ensures precision performance, high productivity, and a long system lifetime, particularly for applications such as backhoe loaders.

The PVG 100 High-Flow now extends the application opportunities to mobile cranes, bulldozers, track-type tractors, wheel loaders, and more. As with the entire PVG range, the PVG 100 is compliant with S-D’s PLUS+1 systems for customizable electronic control.

In terms of PLUS+1, S-D recently announced that it has updated the PLUS+1 compliant SAE J1939 Software Function Block Library (FBL) to support U.S. EPA Tier 4 emissions compliant systems, new S-D products, and various customer requests. S-D says the enhanced J1939 FBL will enable OEMs to develop custom control systems quickly and efficiently.

The upgraded software FBL has predeveloped software blocks that support J1939, a vehicle bus standard for CAN-based communications in the truck, bus, and off-highway markets. Configurable in PLUS+1 GUIDE (Graphical User Integrated Development Environment) version 5.1 or greater, the enhanced J1939 software joins other PLUS+1 S-D FBLs allowing OEMs to lighten the burden on skilled engineers and inexperienced programmers alike, speeding up development and time to market.

The J1939 library contains 30 new function blocks, including support for messages commonly used in Tier 4-compliant systems and support for new S-D products. Also incorporated are 12 updated function blocks with protocol upgrades and new features. New or updated function blocks include basic PGN Receiver and PGN Transmitter function blocks, Diagnostic function blocks, and other miscellaneous J1939 function blocks.

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