Haltech E8 - Manual (Page 110)

Haltech E11/E8 Instruction Manual
Setup of Closed Loop Boost Control
• Set the ‘Closed Loop Boost Target Map’ at the boost level that you want to run across the whole
RPM range.
• Setup the closed loop boost control in the Auxiliary Outputs Page. Click the ‘Adjust PID settings’
edit button and check that the Proportional, Integral and Derivative Coefficients are all set to their
default values. (Proportional – 50%, Integral – 50% and Derivative – 0%)
• Set the frequency of the Turbo Waste Gate solenoid in the ‘TWG Frequency’ field. The Haltech
waste gate solenoid runs at a frequency of 20 – 30 Hz.
• Set the ‘Control Point Before Target’ to the default value of 20 kPa (3 PSI).
• Set the ‘Delay till Boost Control’ to the default value of 0.5 sec.
• Set the ‘Start Duty Cycle’ to a duty cycle that should get you close to your boost target.
• Put the engine under sufficient load (i.e. on a dyno) to get it to reach the target boost level. Watch
to make sure it does not over boost. Also make note of the duty cycle that the waste gate runs
when at the target boost level, this can viewed in the Auxiliary Output Data Page. If the boost level
exceeds the target boost level reduce the ‘Start Duty Cycle’, if the boost dips down before going
back up then try increasing the ‘Start Duty Cycle’.
• If you boost level oscillates around the boost target try reducing the Proportional and Integral values
until the boost is more stable. Proportional and Integral can be reduce by the same amount.
Setup of the Start Duty Map
If the boost target will be varying each time the engine goes on boost, by either a boost trim or
gear boost correction then it is a good idea to setup the ‘Start Duty Map’.
• At first leave the ‘Start Duty By Map’ un-ticked. Set the ‘Closed Loop Boost Target Map’ to control
somewhere above the boost if only running off the waste gate spring.
• Repeat steps 5 and 6 above and record the ‘Start Duty Cycle’ and the corresponding boost target.
• Increment the ‘Close Loop Boost Target Map’ by about 25 kPa (3.5 PSI) and repeat until you reach
the max boost that the engine is going to run.
• Fill out the ‘Start Duty Map’ with the data recorded. Run a duty cycle of zero below the spring
pressure. Run a duty cycle of the max recorded ‘Start Duty Cycle’ above the max boost that the
engine is run.
• Tick the ‘Start Duty By Map’ in the closed loop boost control setup.
• (Optional) To fine-tune the ‘Start Duty Map’ setup a closed boost control trim under the analog input
function page and load up the engine at different boost levels to make sure that the boost control
runs smoothly.
Page: 110 Copyright © Haltech 2008