8HP related links
•8HP torque converter control.
Changelog
•Using the BMW shifter, now possible to use long press to go from D to R, and R to D (while pressing brake).
•Changing between PNRD (while pressing brake) now also possible with max 50 rpm driveshaft speed.
•Improved auto shift table accuracy.
•Downshift prevention in manual mode is now controlled from the MaxxECU revlimit, requires the 002 MAPS 8HP TCU firmware.
•Support for the new Transmission Gear 1 lockout digital input function, requires the 003 internal flash (+002 MAPS).
•Initial BETA support in for the 8HP45 and 8HP70.
Known issues/limitations
•KD limitation under some circumstances do not properly limit the min_target_gear, no danger to engine, it will not downshift to overrev engine (unless revlimit not accurately setup).
•CAN collision with the BMW E9x vehicle, work in progress to solve.
•No virtual clutch (yet), we will investigate if possible later in 2024.
•Kickdown in higher speeds does not properly go down to the min_gear as fast as in lower speed, we are investigating if possible to solve.
•Dodge 0x180 message colide with the WBO CAN module 1.
Needed for the protocol to work
•Populated torque table.
•Brake input.
•Throttle Position.
•Intake air temperature.
•Coolant temperature.
•Battery voltage.
•Actual revlimit set in system.
Note: The MaxxECU does NOT need to control the engine for the 8HP control feature to work, the MaxxECU just needs to be aware of the above engine data values for the 8HP protocol to work.
Standalone controller examples
Note: It is entirely possible, but please note that for the best experience, MaxxECU SHOULD control both the engine and the gearbox.
Example how to setup RPM from a CAN message.
Example how to get brake pedal switch from CAN.
