Haltech E8 - Manual (Page 68)

Haltech E11/E8 Instruction Manual
• Propional Co-eff - The speed at which the control system updates, typically between 10 – 50
depending on how quickly the system needs to react.
• Minimum Coolant Temp - The temperature at which the VANOS system will begin its operation,
below this temperature the camshafts will remain in the fully retarded position.
• Deadband - The degree of accuracy required, a deadband of 3 and the system would control the
camshaft position within 3 degrees of the target position. A deadband of 1 and the system would
control the camshaft to within 1 degree of the target position. A value too high leads to poor
accuracy, too low and the system may oscillate trying to achieve too stringent a result.
Refer to tuning guide section for details on how to tune variable cam timing.
VCT Control Output
This feature allows the operation of the variable valve timing associated with some modern engines. This
feature is designed to controlling continuously variable valve timing. There are multiple control outputs
available as each camshaft to be controlled requires its own VCT control output wire.
For each VCT control output a VCT control input is required (setup in timed input functions), this input
comes from the camshaft position sensor on the camshaft that is being controlled (most commonly the
intake camshaft is variable and the exhaust cam remains static), in which case the exhaust cam sensor
would be used as the ECUs “home” signal and the intake cam sensor is setup as the VCT control input.
Figure 75 - Variable Cam Timing Control Ouput
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