Haltech E8 - Manual (Page 97)

Haltech E11/E8 Instruction Manual
detect only the cruise and light load conditions and only uses O2 closed loop correction under these
conditions. It is not recommended to use O2 closed loop when under high loads and engine speeds where
mixtures should be richer than stoichiometric to ensure cool operation of the engine and higher margins
against detonation.
Closed loop operation is always disabled whenever there are other corrections operating such as throttle
pump corrections, or deceleration cut enrichments. Closed loop control is also disabled until the Engine
Operating Temperature threshold is exceeded.
In addition to above criteria, O2 closed loop operation will not operate under the following conditions:
Throttle pump enrichment is active.
Engine is not above the operating temp threshold as defined in the Main Setup.
Deceleration Fuel cut is performing cut or enrichment operations.
Figure 103 - Fuel Setup Page
Settings
• Low RPM Limit - The minimum RPM at which O
2
control will happen. If this value is greater than
‘Idle RPM Below’ value then O
2
control at idle will be disabled.
• High RPM Limit - The maximum RPM at which O
2
control will happen. Having O
2
control off at RPM
greater than this value will help to steady mixtures at high RPM, which are more sensitive to
fluctuations.
• Max Enrich Incr % - Maximum percentage increase in fuel that is allowed by the O
2
controller. (Max
25%).
• Max Enrich Decr % - Maximum percentage decrease in fuel that is allowed by the O
2
controller.
(Max 25%).
• Target Volt (mV) - This value is what the O
2
controller will try to target when at idle. Some engines
require slightly richer mixtures to have a stable idle. With most sensors, this can be achieved by
setting the target idle voltage slightly higher. The Haltech Wideband allows the user to enter in a
target AFR instead.
• Target Volt @ Idle (mV) - This value is what O
2
controller will try to target. This is usually set to the
Copyright © Haltech 2008 Page: 97