2 bypass air control (bac) valve, 3 dual intake valve control (div) – Haltech E6X Manual DOS Version User Manual

Page 89

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E6X Manual

89

of map one and map two. The conditions for waste-gate map
usage when “Advanced” is selected are:
If the ECU is using the primary fuel and ignition maps then the
ECU will use waste-gate map one to control boost. If the ECU
is using the secondary fuel and ignition maps then the ECU will
use waste-gate map two to control boost. Refer to 4.2.5 Dual
Map Set-Up, p51
.

Boost Limit

0 – 209kPa / 0 – 30 psi
If the manifold pressure exceeds this limit, the solenoid valve
will immediately be set with a duty cycle value of 5%. This will
expose the waste-gate diaphragm to the full manifold pressure
and force the waste-gate to open. This value should be set
slightly higher than the desired maximum boost pressure as a
fail-safe in the event of an over-boost condition.

Update Eng. Data ENABLED or DISABLED

This field defines whether the duty cycle being used to drive the
solenoid is displayed in the engine data page.


13.2 Bypass Air Control (BAC) Valve


The bypass air control function controls a solenoid that regulates air around the throttle to
control the idle speed of the engine. This option has only one parameter:

Period

1 – 50 ms
This sets the period of oscillation of the solenoid. BAC
solenoids will operate across a range of frequencies. Enter the
desired oscillation period in milliseconds here.


The remaining parameters for idle control can be found in the output options page and are
described in 12.1.1 Idle Control, p83.

13.3 Dual Intake Valve Control (DIV)


Some late model engines possess two tuned intake manifolds. One intake tract remains shut at
lower rpm where there is less airflow, then opens as airflow demands increase. This provides
a broader torque curve. The DIV function controls the solenoid that operates this valve.

Switch On RPM

0 – 16000 RPM
This is the engine speed at which the solenoid is to be
energised.

Switch Off RPM

0 – 16000 RPM
This is the engine speed at which the solenoid is to be de-
energised.


There are two configurations in which this feature can be used:
The first configuration is to have two engine speed ranges; one high and one low. In the
lower range the solenoid is disabled and in the upper range the solenoid is enabled. Using this
configuration the On RPM should be set to the lower RPM limit of the upper range and the

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