Trans control - 0021 release

'Microsquirt' Transmission Control development and support.

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ap67et10
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Re: Trans control - 0021 release

Post by ap67et10 »

So after I made a few changes and went to drive the truck I realized it wasn't running quite right. I found it actually did change MAT settings when selecting "trans temp sensor" and using the ford settings. So it does seem to be making changes, just not the correct one over CAN. I am going to hook serial up and program it that way, just like I would with megashift and imagine it will work fine now. I'll report back on how it goes.

I noticed that the TCC doesn't disengage on brake input, but rather only on downshifts. Is that how its suppose to be? My truck around town runs great in 3rd in lockup around 35-45 mph, but if it upshifts around 47-50 mph its good except if lockup engages. If it locks up in 4th at 50 mph it lugs real bad. This is mostly due to the stall that in it. Is it possible to have a minimum RPM for lockup, or even better would probably be a minimum speed per gear for lockup. That way I could get lockup in 3rd around town like I want, but if I get up around 50-55 mph it will shift to 4th but not lockup until around 60 mph?


Andrew
jsmcortina
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Re: Trans control - 0021 release

Post by jsmcortina »

ap67et10 wrote:So after I made a few changes and went to drive the truck I realized it wasn't running quite right. I found it actually did change MAT settings when selecting "trans temp sensor" and using the ford settings. So it does seem to be making changes, just not the correct one over CAN. I am going to hook serial up and program it that way, just like I would with megashift and imagine it will work fine now. I'll report back on how it goes.
I've replicated this.
If you use a project with MS3 + trans, then TunerStudio sends the calibration data to the wrong CANid. I'll email my debug info over to Phil.

If you use a project for trans only then it works - even if your computer is plugged into the MS3. (This is how I was testing before.)
I noticed that the TCC doesn't disengage on brake input, but rather only on downshifts. Is that how its suppose to be?
It ought to disengage when braking.
My truck around town runs great in 3rd in lockup around 35-45 mph, but if it upshifts around 47-50 mph its good except if lockup engages. If it locks up in 4th at 50 mph it lugs real bad. This is mostly due to the stall that in it. Is it possible to have a minimum RPM for lockup, or even better would probably be a minimum speed per gear for lockup. That way I could get lockup in 3rd around town like I want, but if I get up around 50-55 mph it will shift to 4th but not lockup until around 60 mph?
Minimum RPM for lockup should be easy enough. Lockup setpoint per gear is possible if that's a generally useful feature.

James
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sarg
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Re: Trans control - 0021 release

Post by sarg »

Lockup per gear would be useful I think. I like how the factory ecu does it. The table is gear vs tps. That way keeping it unlocked over a certain tps and not locking it at all is some gears is a possibility.
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Re: Trans control - 0021 release

Post by jsmcortina »

Hmm... while reviewing the code earlier to put the manual together, I think I see why the brake input doesn't work on the GPIO...

The brake input isn't defined unless a particular setting is enabled, but there's no menu for it! It is an easy fix.

However, first I'd like some feedback on the GPIO pin usage chart in the manual and I can tweak the code as needed and get another release out. I'll also look at enhancing the lockup behaviour at the same time too.

James
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ap67et10
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Re: Trans control - 0021 release

Post by ap67et10 »

I would really like to have gear specific TCC settings of some sort. I'm sure if I tweak on it I could make these settings work well for both 3rd and 4th, but I know itd be a big help to set different settings between 3rd and 4th. If you had every gear TCC tables of some sort, then I would think you could scale back race mode? seems like anybody wanting a "race mode" effect at WOT could program that in per gear with TCC individual tables?

Also, I don't really understand how to make my external speedo work now? it was set for PPM before which worked well. Is there a way to make the speedo work the way you currently have it? If not thats fine, I can wait till PPM.

Looking forward to the next release.



Andrew
dontz125
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Re: Trans control - 0021 release

Post by dontz125 »

Just kibitzing, no dog in the game - James, have you considered a uSM version of your code? You mention that some trannys need high-side drivers etc that need external components with a uS install; a uSM version would such a thing a bit easier, plus a few more pins.
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
Matt Cramer
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Re: Trans control - 0021 release

Post by Matt Cramer »

dontz125 wrote:Just kibitzing, no dog in the game - James, have you considered a uSM version of your code? You mention that some trannys need high-side drivers etc that need external components with a uS install; a uSM version would such a thing a bit easier, plus a few more pins.
This should work without a code change, just some sort of adapter board.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
dontz125
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Re: Trans control - 0021 release

Post by dontz125 »

I meant the ability to use PA0, PT6 & PT7 for outputs.
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
jsmcortina
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Re: Trans control - 0021 release

Post by jsmcortina »

dontz125 wrote:I meant the ability to use PA0, PT6 & PT7 for outputs.
My original concept for using the Microsquirt was to make it more "wire and go" using an off-the-shelf piece of hardware.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

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dontz125
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Re: Trans control - 0021 release

Post by dontz125 »

Not arguing that part, but you made a comment that the uS didn't have the drivers to operate certain trannys. Thus, the uSM version ...
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
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