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Hi all.
The 4 Spd MATCU has been born out of the TCC locker thread. It's more than a TCC locker hence the new thread.
The MATCU is intended to give the 4Spd Prado the following modes of operation:
1. A “MANUAL” mode (Manual A/T). In this mode, manual gear selection is via wireless control units. Over-speed/RPM and under-speed/RPM protection is included.
2. A “TCC Locker” mode. In this mode, the Torque Converter Clutch is locked in gears 1st through 4th and automatically unlocked during gear changes and when the speed drops below a minimum threshold.
The minimum speed thresholds apply to both modes to avoid engaging the TCC at low speeds thus preventing engine stalls and laboring under load.
Thresholds are defined for each gear for both high and low range using separate definitions for engine braking versus operating under load. All such thresholds are defined in tables in the source code and are easily alterable.
The MATCU Control Unit is based on a Microchip PIC18F4550 Microcontroller.
The system is controlled by wireless control units mounted on the steering wheel LHS, opposite the Cruise Control switch and a similar, easily removed, Velcro mounted unit on the console.
Testing has confirmed that no ECU codes are triggered by this mod, even with configuration splits like ECU thinking it’s configured 4th gear with lock OFF, while the MATCU has actually configured 1st gear with lock ON.
It’s simple to use and foolproof. This is the ultimate A/T mod from the driver’s point of view.
If your keen, you can alter the source code to change its behavior altogether.
Alternatively you can modify its various threshold tables to change its trip points to suit your specific vehicle characteristics.
For example, the thresholds have been setup for my V6 petrol Prado. A diesel, with its different torque characteristics, could operate with the TCC lock ON down to lower speeds.
The data is here: https://www.dropbox.com/sh/s97o8wisy...oT8OSzFDa?dl=0
If reviewing this, start with the file “Prado 4Spd MATCU - System design Rev 4.docx”
I’m sure the amount and complexity of the data will scare most people.
Most of the data relates to software development, troubleshooting, debugging and programming of the system.
You could avoid all that by having somebody supply a preprogrammed microcontroller. All you have to do then is copy the prototype that I’ve built or have somebody do a PCB, which would simplify the assembly process.
Others that go the “whole hog” and setup the development environment could supply preprogrammed microcontrollers to those that don’t wish to go to that extreme. If desperate contact me and I will arrange something.
If anybody needs any help or clarification with any aspect of this don’t hesitate to contact me, preferably by email as I don’t always look here.
Cheers
Bob
[email protected]
The 4 Spd MATCU has been born out of the TCC locker thread. It's more than a TCC locker hence the new thread.
The MATCU is intended to give the 4Spd Prado the following modes of operation:
1. A “MANUAL” mode (Manual A/T). In this mode, manual gear selection is via wireless control units. Over-speed/RPM and under-speed/RPM protection is included.
2. A “TCC Locker” mode. In this mode, the Torque Converter Clutch is locked in gears 1st through 4th and automatically unlocked during gear changes and when the speed drops below a minimum threshold.
The minimum speed thresholds apply to both modes to avoid engaging the TCC at low speeds thus preventing engine stalls and laboring under load.
Thresholds are defined for each gear for both high and low range using separate definitions for engine braking versus operating under load. All such thresholds are defined in tables in the source code and are easily alterable.
The MATCU Control Unit is based on a Microchip PIC18F4550 Microcontroller.
The system is controlled by wireless control units mounted on the steering wheel LHS, opposite the Cruise Control switch and a similar, easily removed, Velcro mounted unit on the console.
Testing has confirmed that no ECU codes are triggered by this mod, even with configuration splits like ECU thinking it’s configured 4th gear with lock OFF, while the MATCU has actually configured 1st gear with lock ON.
It’s simple to use and foolproof. This is the ultimate A/T mod from the driver’s point of view.
If your keen, you can alter the source code to change its behavior altogether.
Alternatively you can modify its various threshold tables to change its trip points to suit your specific vehicle characteristics.
For example, the thresholds have been setup for my V6 petrol Prado. A diesel, with its different torque characteristics, could operate with the TCC lock ON down to lower speeds.
The data is here: https://www.dropbox.com/sh/s97o8wisy...oT8OSzFDa?dl=0
If reviewing this, start with the file “Prado 4Spd MATCU - System design Rev 4.docx”
I’m sure the amount and complexity of the data will scare most people.
Most of the data relates to software development, troubleshooting, debugging and programming of the system.
You could avoid all that by having somebody supply a preprogrammed microcontroller. All you have to do then is copy the prototype that I’ve built or have somebody do a PCB, which would simplify the assembly process.
Others that go the “whole hog” and setup the development environment could supply preprogrammed microcontrollers to those that don’t wish to go to that extreme. If desperate contact me and I will arrange something.
If anybody needs any help or clarification with any aspect of this don’t hesitate to contact me, preferably by email as I don’t always look here.
Cheers
Bob
[email protected]