Cam Control
The Cam Control function allows the Haltech ECU to control continuously variable cam systems on up to two intake cams and up to two exhaust cams.
Variable cam control systems are typically controlled by a solenoid that regulates oil pressure into and out of a chamber in each of the cam gears to move the cam position relative to the crank position. If there is a high duty provided to the solenoid it will allow more oil pressure to push the mechanism open, and when there is a low duty it will drop the pressure which causes the mechanism to close. There will be a certain amount of duty that will cause the cam to stay in one position and to not open or close. This duty is what we refer to as the Base Duty. i.e. supplying more duty than the Base Duty will cause the cam to move in one direction, and supplying less duty than the Base duty will cause it to move in the other direction.
The Base Duty itself can vary with oil temperature, viscosity, or any number of other factors, which is why Open Loop control does not work with variable cam timing systems. Even a very small amount of error in selecting a fixed Base Duty would cause the cam position to drift in one direction. As such the Cam Control must operate in Closed Loop to maintain accurate control.
Number of Banks - Select the number of banks that the engine has. This is to let the Elite ECU know how many intake cams and how many exhaust cams are to be controlled.
Mode - Select whether the Intake Only cams, the Exhaust Only cams, or both the Intake and Exhaust cams are to be controlled.
Solenoids Per Camshaft - Select whether there are 1 or 2 solenoids per camshaft
Target Angle Max Delta Rate - Allows control of the maximum speed the cams can be moved. This can prevent the cam control from trying to chase a rapidly moving or oscillating target, which gives a smoother cam movement.
Enable Long Term Trim - Select this box to enable long term trim of Cam Control
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Cam Control Switched
Cam Control Switched is used where there is a variable cam control system that only relies on being switched on or off. This is not to be used for continuously variable cam control systems. Examples of different types of common switched systems are ...Cam Control Wiring
Connections Intake and Exhaust Cam Inputs - Select an appropriate input wire, typically either the Home or an SPI (Synchronised Pulsed Input), that will be wired to the selected cam position sensor. Each variable cam must have a position sensor so ...Cam Control Switched Wiring
Settings Options Output Mode - Select from the following: Intake or Shared Output - Only select when controlling one Intake Cam Solenoid, or one Shared (Intake and Exhaust) Solenoid. Exhaust - Only select when controlling one Exhaust Cam Solenoid. ...Intake Cam Control
Settings Intake Frequency - The frequency used by the Intake Cam Control solenoids. Using a low frequency can give an increased usable duty range but may cause the solenoid to rattle. Using a high frequency can limit the usable duty range. Intake ...Exhaust Cam Control
Settings Exhaust Frequency - The frequency used by the Exhaust Cam Control solenoids. Using a low frequency can give an increased usable duty range but may cause the solenoid to rattle. Using a high frequency can limit the usable duty range. Exhaust ...