Haltech F10X - Manual (Page 37)

F10X Manual
37
Injection Mode
The ECU can operate in 3 different injection modes depending on the application
these are:
Multipoint injection fires all the injectors together. This is the most common set-up
and will normally be used on engines with multipoint injection manifolds (one injector
per cylinder).
Batch-fire injection is usually used in throttle body or non-turbo rotary set-ups and
fires the two banks of injectors alternately. On eight and twelve injector fuel rails,
with high-flow injectors, this may also help reduce fuel pressure oscillations caused by
all injectors pulsing together.
Staged injection is usually used on high boost turbo engines. Injector outputs 1 and 2
fire all the time, just as in a multipoint set-up. When the boost pressure exceeds a
programmed value, injector outputs 3 and 4 are enabled.
The staged injectors are normally upstream of the primary injectors. The point at
which the ECU switches in the secondary injectors is set via the Staging Bar Number
field which is described below. Staging permits high fuel-flow capability, but
maintains accuracy and controllability at light load and idle.
Enable Injectors
This field allows the user to turn on all injector outputs. Turning this checkbox off will
disable all injector outputs.
Post Start Temp Limit
This field sets the temperature at which the post start correction map is either enabled
or disabled. The following field “Above/Below” sets whether the enabled state
corresponds to a temperature above or below the Post Start Temp Limit. The Post
Start correction map will apply correction to the injection times from when the motor
is started to when the engine temperature reaches the Post Start Temp limit.
Post Start Time Limit
This field sets the period of time across which the Post-start map is to operate.
Ignition Divide By
Ignition Divide By is the number of Ignition / Trigger pulses that will be counted until
the next injection pulse. For almost all multipoint systems, injection should occur once
per revolution so Ignition Divide By should be set to half the number of cylinders. If
the system is operating in Batch Fire mode, or is a rotary, then a value of 1 is
suggested.
Staging Bar Number
This field sets the point at which the staged injectors are enabled. If the injection
mode is not "Staged Injection" then this field will not affect injection.
Zero Throttle Map
This feature allows the user to adjust a special fuel map that is used only when the
throttle is closed. This feature should be used for engines that produce constant
vacuum while cruising but irregular vacuum when idling. The zero-throttle Map can