Trans control release pre-1.0.2 beta1

[jsmcortina]

To announce the pre-1.0.2 beta1 version of the Microsquirt trans code.

Changes since release 1.0.1
Bug fixes
CAN range checking and passthrough.

New / changed features
Add 4R70W digital range selector input pattern.
Tweak 5L40E reverse output pattern.
Per user request, don’t unlock convertor during shifts.

Minor / internal
–

The zip can be downloaded via:

http://www.msextra.com/downloads/dev/tr ... 0-2-beta1/

[Philip Lochner]

Thank you James!

My car is going in tomorrow to have AC pipes fitted and hopefully to get the AC system into operation. Will try this out as soon as I have it back.

Just to confirm though:
Will TCC still unlock if TPS > "Lockup max TPS %" ? (I'm hoping to use this value to unlock TCC for "large throttle" downshifts - not knowing if its really necessary to have TCC unlocked during 4-3 or 3-2 downshifts.).

[jsmcortina]

Yes, the code change was small.

Previously the logic said:
if new_gear != old_gear then
- unlock convertor immediately
- return to waiting for lock conditions

I commented out that piece of code, so it will unlock if the lock conditions are no longer met.

James

[ashford]

gave it a shot, it seems to work well.
a few requests though

1. a spare output please- i have a remote mount cooler and it relies on the fan or road speed to keep air across it, i would like the fan to come on at temp instead of all the time.
2. have pressure table on map and shifts on tps. this is needed on a turbo car as a single tp angle can have significantly different torque outputs

[nathaninwa]

I like the output idea. I'm wiring in a cooling fan now and have been thinking how to get this done

[jsmcortina]

I like the output idea. I'm wiring in a cooling fan now and have been thinking how to get this done

You could handle this on the main ECU if you have a spare output. Have the MS3 collect the ADC data from the trans box and then operate an output based on that.

James

[nathaninwa]

Thankyou, yes I should have a few extra outputs.

[jamies]

james,
i dont think the lockup code is delaying "lockup wait time" before applying lockup
i noticed that it will lockup immediately when the VSS reaches the min VSS lockup speed and will also lockup immediately after a throttle off / throttle on above the lockup speed whereas i beleive it should be waiting the "lockup wait time" before applying the lockup converter each time it is applied?
it also results in stacking my 2-3-3Lockup shifts, ie my current lockup point is min 3rd gear at 60kmh, however at high throttle angles my 2-3 upshift may be over 60km/h where it changes from 2 to 3 at the required speed and then applies the lockup immediately after that shift, even though i have a wait time of 3 sec.
I'll see if I can get you some datalogs in the next couple of days - anyone else seen this occur.

[ashford]

i have seen a on-off-on-off-on-off condition near min lockup speed like it is ignoring the hysteresis. i havent had an opportunity to dig into it yet.

[jsmcortina]

i have seen a on-off-on-off-on-off condition near min lockup speed like it is ignoring the hysteresis. i havent had an opportunity to dig into it yet.

If you can capture a datalog of it, that would help.

James

[jamies]

also another question for james, or maybe more of a feature request
but one application is in a 4wd, which means a hi / low transfer case, which affects the vss readings
is there any plans to allow a 4wd input signal which will divide the shift points by a specified ratio?

[Philip Lochner]

is there any plans to allow a 4wd input signal which will divide the shift points by a specified ratio?

Isnt that one of the uses of the existing "switch map" input?

[Philip Lochner]

is there any plans to allow a 4wd input signal which will divide the shift points by a specified ratio?

Isnt that one of the uses of the existing "switch map" input?

Sorry, ignore my post got confused with other software.

[jsmcortina]

also another question for james, or maybe more of a feature request
but one application is in a 4wd, which means a hi / low transfer case, which affects the vss readings
is there any plans to allow a 4wd input signal which will divide the shift points by a specified ratio?

Post up a feature request and explanation.

James

[jamies]

no probs, will do..
i have a few requests do you want them all in one topic or seperate them?

[jsmcortina]

One at a time is likely best.

James

[ashford]

i have seen a on-off-on-off-on-off condition near min lockup speed like it is ignoring the hysteresis. i havent had an opportunity to dig into it yet.

If you can capture a datalog of it, that would help.

James

i reproduced it many times in this log i hit the spacebar a few seconds after most occurances. the magic spot seems to be 33 mph in 4th gear. initially the 3-4 shift was at that point and was changed to 30 during the log. min vss for lockup is 30mph, so i think it has something to do with 33 mph and not the 3-4 shift speed. posibly 33mph is touching hysteresis backwards? i never changed min speed for lockup in 4th or hysteresis settings

[jamies]

i reproduced it many times in this log i hit the spacebar a few seconds after most occurances. the magic spot seems to be 33 mph in 4th gear. initially the 3-4 shift was at that point and was changed to 30 during the log. min vss for lockup is 30mph, so i think it has something to do with 33 mph and not the 3-4 shift speed. posibly 33mph is touching hysteresis backwards? i never changed min speed for lockup in 4th or hysteresis settings

that looks to me like it might be getting under the min rpm for lockup (1200rpm?), causing it to unlock. then the rpm goes up, it locks, falls under, unlocks and so on. (i didnt open the msq, only looked at the log)

[ashford]

i reproduced it many times in this log i hit the spacebar a few seconds after most occurances. the magic spot seems to be 33 mph in 4th gear. initially the 3-4 shift was at that point and was changed to 30 during the log. min vss for lockup is 30mph, so i think it has something to do with 33 mph and not the 3-4 shift speed. posibly 33mph is touching hysteresis backwards? i never changed min speed for lockup in 4th or hysteresis settings

that looks to me like it might be getting under the min rpm for lockup (1200rpm?), causing it to unlock. then the rpm goes up, it locks, falls under, unlocks and so on. (i didnt open the msq, only looked at the log)

i feel wetardit. i don't believe i missed that. i guess i just get confused jumping between gm, ford, megashift and megasquirt tuning.

[jamies]

here is a datalog of the lockup wait time being ignored, look at ~ 419 and 482 sec
my wait time was set for 3 sec