Haltech E6A - Manual (Page 101)

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Channel 3 IGN OUT
Channel 4 Aux Out 1
Channel 5 Aux Out 2
Channel 1 INJ1/INJ2
B.3 Sequential Injection
Sequential injection allows fuel to be delivered to the engine at a time that produces best
combustion. Since this time is different for each cylinder, sequential systems inject fuel at
different engine angles for each cylinder. The Sequential Injection Mode of the E6A will
control up to four separate fuel channels. This provides full sequential for engines up to 4
cylinders, and semi-sequential for 6, 8 and 12 cylinders engines.
B.3.1 Sequential Features on the E6A
Injector Phasing
The timing (or phasing) of these injections is set via the Injector Phasing Map. This Map sets
the angle of the End of Injection, in degrees BTDC exhaust (not compression), against the
engine speed. This allows the injection to be completed before the inlet valve opens. The E6A
then times the start of injection, based on the trigger, so that the injection is completed by the
specified engine angle. If the E6A computes that there is insufficient time to complete injection
before the specified End of Injection time, then injection will continue past this time.
Injector Trims
With multiple injector channels, it is possible to trim the fuel injection time to each channel.
The E6A has the ability to adjust each channel by ± 12.5%. This is meant primarily for the
‘equalization’ of flow rates between injectors with marginally different flow rates. These trims
are accessed through the Fuel Maps and Setup Menu.
B.3.2 Sequential Outputs
The E6A can run full sequential on an engine with up to four cylinders. When the Ign / By is
set to 1 in the Fuel Setup, injection will occur once per engine cycle (every second revolution)
for each channel. The output channels used and the order of injection are :
Channel 1 INJ1/INJ2
Channel 2 INJ3/INJ4
Channel 5 Aux Out 2
Channel 4 Aux Out 1
If you have less then 4 cylinders will not need all four outputs. A 3 cylinder engine, for
example, will only use channels 1, 2 and 5. Channel 4 is then left available as an Auxiliary
Output.