Haltech E6K - Manual (Page 99)

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16.4 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.
In order to use the DIV function, you will need the following:
- a two wire solenoid valve mounted in the air intake (already on the engine);
- E6K programming software and cable.
Wire the solenoid to the appropriate output, taking note of voltage polarity. (Some solenoids
are non-polar.) Run the E6K programming software in ONLINE mode and select the Dual
Intake Valve function on the appropriate channel. There are two values to be set.
Switch On RPM
This is the engine speed at which the solenoid is to be energised.
Switch Off RPM
This is the engine speed at which the solenoid is to be de-energised.
There are two ways in which this feature can be used:
The first application is to have two RPM 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 application
the On RPM should be set to the lower RPM limit of the upper range and the Off RPM should
be set to at least 200 RPM below On RPM, forcing hysteresis in the switching to prevent the
solenoid from oscillating.
The second application is to enable the solenoid for a range of RPM and to disable the
solenoid when the RPM falls outside this range. To do this the On RPM is set to the lower
RPM limit of the range and the Off RPM is set at the upper RPM limit, when the RPM is
lower than On RPM the solenoid is disabled, when the RPM is greater than On RPM but less
than Off RPM the solenoid is enabled, when the RPM is greater than On RPM and Off RPM
then the solenoid is disabled.
16.5 Torque Converter Clutch Lockup (TCC)
This function controls the clutch lockup solenoid on automatic transmissions. Locking the
torque converter reduces the amount of energy lost through the transmission, providing better
fuel economy.
The solenoid activates whenever the road speed is greater than a programmed value for a
given throttle position. The solenoid will only activate if the engine temperature is higher than
46°C (118°F), and will be disengaged if the throttle position exceeds 70% or road speed falls
below 64kph. The TCC function also provides for a 4th gear/transmission over-temperature
switch input. This signal indicates that the transmission is hot, and engaged in top gear. When
this is the case, the lockup solenoid is activated regardless of road speed whenever the throttle
is more than 4% opened.
To use the TCC function, you must have the following:
A square wave signal road speed indicator whose frequency is proportional to road
speed; (this may require a unit for signal conditioning, such as the Haltech
TM
RA7)