Haltech E8 - Manual (Page 98)

Haltech E11/E8 Instruction Manual
stoichiometric voltage of the O
2
sensor that is being used. Typically for a narrowband this is 600mV.
The Haltech Wideband allows the user to enter in a target AFR instead.
• Load Select - Choose if TPS or MAP sensor or both will disable O
2
control. If set to both only one
them has to fail for O
2
control to be disabled.
• Throttle Limit (%) - If load select is TPS or both, any throttle position above this percentage disables
O
2
control.
• MAP Limit (kPa) - If load select is MAP or both, any MAP senor reading above this value disables
O
2
control.
• Operating Temp ° C - O
2
control will only work above this coolant temperature.
• Sample Rate - The rate at which the controller will read the O
2
sensor and calculate the correction.
• Proportional / Integral Settings - Values are used to alter the gains and response of the controller.
• Idle RPM Below - When the engine speed is below this value and there is zero throttle then the O2
Target Idle Voltage is used. To disable the use of this parameter then set it lower than the ‘Low RPM
Limit’ value.
• O2 Sensor Type - Select the type of O
2
sensor that is being used.
• O2 Warm-up Time (sec) - A cold O
2
sensor voltage reading is always low. Set this value so that the
sensor has enough time to reach operating temperatures.
• Delay till Control (sec) - This setting will delay when the closed loop O
2
control will start when all the
conditions are met. This helps the controller stop cutting in and out when on the border of one of the
conditions that need to be satisfied.
Setup of Closed Loop O
2
Control
The following steps will guide you through methods to setup and tune your closed loop O
2
Setup Using a Narrowband Sensor
• Ensure that your Fuel and Ignition maps are well tuned and warm your engine up to operating
temperature.
• Tick the ‘O2 Closed Loop Enable’ checkbox and enter in values for the closed loop O
2
control. Check
all the settings of the controller, the above values are a good place to start.
• Enter in the target voltage into the ‘Target Volt (mV)’ field and if being used the ‘Target Volt @ Idle
(mV)’.
• Reset the ‘Integral’ to zero.
• Adjust the ‘Integral’ until there is an oscillation at a frequency of 1 Hz (1 second to complete a cycle).
A good way to check for this is to display the O
2
Correction in the trace view in the ‘Data Log Page
(Custom Engine Data)’.
Setup Using a Wideband Sensor
• Ensure that your Fuel and Ignition maps are well tuned and warm your engine up to operating
temperature.
• Tick the ‘O2 Closed Loop Enable’ checkbox and enter in values for the closed loop O
2
control.
Check all the settings of the controller, the above values are a good place to start.
• Enter in the target voltage into the ‘Target AFR’ field and if being used the ‘Target AFR @ Idle’.
• Reset ‘Proportional’ and ‘Integral’ to zero.
Page: 98 Copyright © Haltech 2008