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Engine/Gearbox questions and discussion
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Confused
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Post by Confused » Fri Apr 12, 2013 11:39 am

My dad used to work for Mitsubishi, and their cars had the INVECS gearboxes which learnt. It was typically a Galant that came in, owned by an older gentleman, and after servicing, it was taken for a test drive. Standard procedure with these was to drive it "hard", which began to "reprogram" the ECU to the more aggressive driving style.

A number of these old gentlemen would come back a couple of days later and proclaim that it goes so much better now it's been looked at - in reality, the biggest difference was that the gearbox ECU had been given an idea of how to drive quicker - so it was holding onto gears longer and making more use of the power - after a little while longer of the old gentlemen driving the car, it would settle back down after being used to no more than 10% throttle, and upshifting at 2k rpm, until it came for its next service, when the ECU would see 100% throttle and revs up at 6.5k again, and the whole process would continue!


When you disconnected the battery, the autobox ECU would have "lost" all its information about the gearbox (assuming the Honda one is as clever as the Mitsubishi INVECS system?)

When you reconnected, it had to go through the learning process again - this is why it's "better".

Also - by driving it in tiptronic, you are not allowing the ECU to determine the shift points as per its programming/learned status.

Vti Steve
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Post by Vti Steve » Sat Apr 13, 2013 2:19 pm

Confused wrote:My dad used to work for Mitsubishi, and their cars had the INVECS gearboxes which learnt. It was typically a Galant that came in, owned by an older gentleman, and after servicing, it was taken for a test drive. Standard procedure with these was to drive it "hard", which began to "reprogram" the ECU to the more aggressive driving style.

A number of these old gentlemen would come back a couple of days later and proclaim that it goes so much better now it's been looked at - in reality, the biggest difference was that the gearbox ECU had been given an idea of how to drive quicker - so it was holding onto gears longer and making more use of the power - after a little while longer of the old gentlemen driving the car, it would settle back down after being used to no more than 10% throttle, and upshifting at 2k rpm, until it came for its next service, when the ECU would see 100% throttle and revs up at 6.5k again, and the whole process would continue!


When you disconnected the battery, the autobox ECU would have "lost" all its information about the gearbox (assuming the Honda one is as clever as the Mitsubishi INVECS system?)

When you reconnected, it had to go through the learning process again - this is why it's "better".

Also - by driving it in tiptronic, you are not allowing the ECU to determine the shift points as per its programming/learned status.

Wow!!!!

That's all I can say mate

Thanks for the info !

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Post by nitin_s1 » Sat Apr 13, 2013 2:22 pm

I don't have a car to go Mimms now! :(

Hopefully someone will pick me up. :ugeek:

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Post by Vti Steve » Sat Apr 13, 2013 2:23 pm

nitin_s1 wrote:I don't have a car to go Mimms now! :(

Hopefully someone will pick me up. :ugeek:
What's up wiv car mate?

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Post by nitin_s1 » Sat Apr 13, 2013 2:34 pm

Nothing is wrong! :lol:


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