When used in radiator cooling fan applications, the Danfoss RDM uniquely incorporates the external shift valve within the motor itself. This is eliminating the directional control valve, and either simplifying or completely eliminating the HIC block. With fewer components in the hydraulic circuit, the RDM frees up space in the engine compartment. This creates additional opportunities for innovation.
Design advantages like this help combat the challenges brought on by today’s harder-working, hotter-running Tier 4-compliant engines. Places where emission control equipment takes up more under-hood space than ever before. Building on our proven efficiency and reliability, the compact Danfoss RDM motor is technology that’s helping Danfoss engineer tomorrow.
Danfoss offers a wide range of efficient fan drive systems. Below are the benefits and critical considerations. You need to take these into account as you determine the right system for your specific needs.
Benefits
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Increased efficiency due to variable flow and piston motor technology
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Fan speed independent of engine speed
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Fails to full fan speed
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Motor speed sensors available
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Higher motor pressure, power and life ratings
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Less engine power consumption
Critical considerations
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Back pressure required for axial piston motors
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No ZERO speed capability
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Larger reservoir capacity required for high flows
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Motor thrust load capability must be calculated
Engineered for power, space, and performance
The Danfoss Reverse Displacement Motor (RDM) is a breakthrough in technological innovation and engineering.