For example a Drive Ratio of 1.2 indicates a fan pulley that is smaller than the crankshaft pulley, resulting in 1.2 fan revolutions for every crankshaft revolution. High Efficiency Viscous – The Pulse Width Modulation fan control signal from the ECM is used to control and vary the speed at higher frequencies.ĭrive Ratio – The ratio of the fan pulley revolutions to crankshaft pulley revolutions. Variable Speed without Speed Sensor – The Pulse Width Modulation fan control signal from the ECM is used to control and vary the speed.ĭatalink Output – this will allow the ECM to accept input from a multiplexed signal. The fan speed sensor provides speed feedback to more accurately control the speed of the fan. The Pulse Width Modulation fan control signal from the ECM is used to control the fan speed.Įlectronic Viscous with Speed Sensor – When the air temperature reaches a specific level, the control moves an actuator that allows viscous fluid to engage the fan drive and increase the fan speed. It runs at a low speed when possible, for lower noise and power loss.Įlectronic Viscous without Speed Sensor – When the air temperature reaches a specific level, the control moves an actuator that allows viscous fluid to engage the fan drive and increase the fan speed. Tri-State – also called a “three-speed” fan. This value should be supplied by the vehicle manufacturer. Variable Speed Fan Frequency – The frequency required by a variable speed fan. Variable Speed – Varies the speed as required to attain lowest noise and power loss. Many of these fans have an air-actuated clutch that is either completely engaged or completely disengaged. On/Off – also called “two-speed” fans most ECM-controlled fans are this type. Minimum Run Time – This is the minimum time the fan will run when ON.įan On with Remote Throttle – When enabled, this will allow the fan to turn on when the remote throttle is in use.įan Type – The ECM sends a signal to the fan actuator according to the type of fan selected: This parameter is set by the calibration. Heavy-duty engines include a built-in delay that causes the fan to turn on after the engine brakes are activated.įan Minimum Run Time – When enabled, the Minimum Run Time can be configured. This feature provides extra parasitic load during periods of extended engine braking. This is typically calibrated to occur with extended brake operation only for example, some calibrations will activate the fan if the engine brakes are held on for more than 15 seconds. When the vehicle speed is above 6 miles per hour, the fan will run for at least the time specified by Minimum Fan On Time for Air Conditioner Pressure Switch.įan On During Engine Braking – If enabled, the ECM turns on the fan with the engine brakes.
If this feature is enabled and the air conditioner pressure switch causes the fan to turn on, the fan will remain engaged until vehicle speed exceeds 6 miles per hour. The operator may turn the fan on regardless of operating conditions.Īir Conditioner Speed Control – This feature enables the fan to run continuously during idle with the air conditioner on.
#CUMMINS INSITE SOFTWARE REQUIREMENTS MANUAL#
The fan will continue to run until the vehicle exceeds a predefined calibrated vehicle speed threshold or the engine is shut down and restarted.įan Control Switch – When enabled, the ECM will respond to a manual fan switch installed in the cab by the vehicle manufacturer. Vehicle Speed Interaction – When enabled and the vehicle is stationary or at a low speed, when the air conditioning causes the fan to run, it will run continuously. Minimum Fan On Time for Air Conditioner Pressure Switch – The minimum time that the fan will operate in response to the air conditioner pressure switch. The ECM will turn on the fan in response to signals from the air conditioner pressure switch. 12/24 Volt On - The fan will turn ON at 12/24 volts and turn OFF at 0 volts.Īir Conditioner Pressure Switch Input – Enables the ECM to respond to an air conditioner pressure switch installed by the vehicle manufacturer. 0 Volt On - The fan will turn ON at 0 volts and turn OFF at 12/24 volts. This feature enables the ECM to turn the fan on or off in response to any of the following inputs:Įngine operating conditions (coolant temperature, intake manifold temperature, etc.)Įngine performance requirements, such as engine brakingįan Control – When enabled, this allows the user to set up the parameters for proper engine cooling, reducing intake manifold temperature, air conditioner refrigerant temperature, and aiding in engine braking.įan Control Logic – When the “Fan Control” is enabled, this parameter will allow the user to set logic of the fan voltage. This feature controls an OEM supplied fan that is installed to meet the needs of vehicle and engine systems that rely on fan cooling for proper operation. Fan Control on Cummins INSITE Software (CUMMINS Engines)
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