Inter Cooler Spray Control
This function allows for control of a solenoid or pump to spray water onto an air/air Inter Cooler (IC) for more efficient cooling of the intake air. Once the conditions are met to enable the IC Spray function, the pump control relay is pulse width modulated at a low frequency and low duty cycle. The purpose of this is to repeatedly spray a mist of water onto the Inter Cooler then allow it to evaporate.
For IC Spray to activate both the selected Input must be active and the switching function Runtime ON/Off Value requirements must be met.
Settings
Output - Sets which Auxiliary will be used to control the IC Spray pump/solenoid.
Input - Sets which input will be used to activate the IC Spray control.
Switching Function - Determines which Runtime will be used in conjunction with the ON Value and OFF Value settings to activate the IC Spray control.
ON Value and OFF Value - Determines the actual value at which to switch on/off the IC Spray function. These settings act as a form of hysteresis, the selected Runtime's (selected in Switching Function) value has to go above the ON Value to activate IC Spray and drop below the OFF Value to deactivate it.
Water Spray Mode - This has an effect on water consumption over a long period of time. When the switching conditions are no longer met the IC Spray drive will turn off. There is a high chance that the system will be part way though a cycle when it switches off. The Resume option means that when the switch conditions are met, the system will continue from the same position in the cycle. This means that the pump may actually be off or about to turn off even though the function has been activated. In contrast, the Reset option will automatically start spraying from the beginning of the cycle as soon as the function has been activated.
Spray Period - The time taken for one complete on/off cycle, 5 to 10 seconds is typical.
Spray Duty Cycle - Controls how much water is delivered once the IC Spray function is activated. 100% means the pump will run continuously, 50% means that the pump will cycle with equal on and off times, 25 to 50% is typical.
RPM Lockout - IC Spray Control will be disabled below this RPM. This can be set to zero to allow testing of the IC spray function without the engine running, a typical value is 400 RPM.