Torque Converter

Torque Converter

Torque Converter

The Torque Converter function allows the electronic control of the torque converter lockup, as well as the ability to "dump" torque converter line pressure in order to control engine power in a drag racing application, as well as assisting the engine to "come up on the converter" to prepare for a standing start race.


Torque Converter Lock

Lock Point Variable - Select which channel is compared to the values in the Lock Point Table. This is typically Driven Wheel Speed for street cars, circuit racing cars and rally cars. It is typically Driveshaft RPM for drag racing cars, as their tyres don't have a constant rolling radius. 
Minimum TPS - The Torque Converter will not lock when Throttle Position is less than this value. If it is already locked, it will unlock if the Throttle Position goes below this value. Recommended value: 0 %.
Maximum TPS - The Torque Converter will not lock when Throttle Position is greater than this value. If it is already locked, it will unlock if the Throttle Position goes above this value. 
Recommended value: 100 %.
Minimum Coolant Temperature - The minimum coolant temperature that must be achieved before Torque Converter control is enabled. This is to ensure the engine is at a suitable operating condition to lock the torque converter. Recommended value: between 30°C and 70°C ( 85°F - 160°F)
Minimum Gear - The torque converter won't lock if the Gear channel is less than this, and will unlock if it ever drops to below this. Recommended value: depends on transmission. Commonly 2-4. 
Minimum Race Time - The torque converter won't lock when race time is below this value.
Unlock When Braking - The torque converter will unlock when the Brake Pedal State channel is 'On'. This is commonly done to improve driver and passenger comfort. 
Unlock When Shifting - This is commonly done to allow the Torque Converter to slip during gear shifts, which can help to create smoother gear shifts. 
Lock When Transmission Control In Dyno Mode - This setting is only available if the Transmission Control function is enabled. If this is ticked, then whenever the Transmission Control function is in Dyno Mode and has reached the dyno gear, then the Torque Converter Lock will engage to create a direct link between the engine and the drive wheels, without any slippage in the torque converter. This aids the tuner by making it easier to get to a wide range of table axis sites to be tuned. e.g. low RPM and high load sites can be difficult to get to if the torque converter is unlocked. 
When the Transmission Control function leaves dyno mode (either by putting the gear selector into Neutral, or by disabling Dyno Mode in the software), the torque converter lock behaviour will return to normal. Recommended value: enabled. 
PWM Frequency - The frequency to Pulse Width Modulate the PWM Output. 
Recommended value: consult the workshop manual for the transmission. If you are importing a map supplied by Haltech, this should be set appropriately for your transmission. 
Common values: around 300 Hz.
Duty Cycle When Unlocked - What duty cycle to use on the PWM Output when the torque converter is to be unlocked. 
Recommended value: consult the workshop manual for the transmission. If you are importing a map supplied by Haltech, this should be set appropriately for your transmission. 
Common values: 100 %

Dump Valve

Frequency - Frequency of the PWM signal to the Torque Converter Dump Valve.

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