Danfoss continues to lead the industry with groundbreaking fan drive technologies like our reverse displacement motor (RDM). By occasionally changing the airflow direction, accumulations of debris can be dislodged from the vehicle’s radiator. This helps to ensure efficient cooling system performance.
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.
Increased efficiency due to variable flow and piston motor technology
Fan speed independent of engine speed
Fails to full fan speed
Motor speed sensors available
Higher motor pressure, power and life ratings
Less engine power consumption
Back pressure required for axial piston motors
No ZERO speed capability
Larger reservoir capacity required for high flows
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.
Reverse displacement axial piston motors
Reverse displacement motors (RDM) are a key asset to decreasing system costs, boosting machine efficiency, and reducing service downtime. Our RDMs eliminate complex valving and leak points normally required to implement reversing of fan airflow, common to the cooling and cleaning systems of construction and agricultural equipment.
Fixed displacement axial piston motors
MP1 motor is our next generation of fixed displacement axial piston motors. MP1 motors deliver best-in-class package size and efficiency, installation versatility, and provide great solutions for propel, work function, and Fan Drive system for your mobile applications.
Variable displacement open circuit pump w/ piston motor (non reversing)
Danfoss offers a wide range of efficient fan drive systems based on your unique cooling needs. we can work with you to design a number of different open circuit and closed circuit fan drive systems. Helping to solve your challenges.