Auto Idle

  • In a situation where pump pressure is not needed due to low or no operations, it is important to reduce engine speed until pressure is needed again. Reducing the engine speed in idle situations increases the efficiency of the hydraulic system and thereby reducing fuel consumption and engine noise levels.

    Although many auto idle applications are commonly using a mechanical switch, Danfoss recommends using an electronic switch.

    Mechanical Switches Have Many Problems
    • Mechanical switches often leak causing warranty claims
    • The electrical contacts can burn out resulting in failure
    • The general accuracy is around +/- 5%
    • The set point can drift over time
    • Over and burst pressure limitation due to moving parts
    Benefits by Using Electronic Pressure Switches
    • Electronic pressure switches have 100% welded construction so no leakage possible
    • No electrical contacts to burn out
    • Highly accurate – better than 2% typical
    • No set point drift
    • Over and burst pressure advantage due to fully welded design
    • All the advantages from the “world” of transmitters in relation to vibration shock etc.
    • A more reliable auto idle system
    • Less wear outs of the switch due to no mechanical parts
    • Reduced warranty claims
    Typical Specifications
    • Switch point range: 40 bar
    • Pressure range: 0 – 60 bar
    • Temperature range: -40 – 125 °C
    • Accuracy: 2% FS
    Recommended Products


  • Auto Idle

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