Page 3 of 8
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 12:47 am
by Addicted
Hi Lance,
That didn't work at all. I was able to reverse out of my garage and out onto the road, only then discovering that I had no forward gears! The cGear gauge in TS just turns red when I engage drive. Had to push the car back into garage.
Luckily the datalogger was running so I'll get the log to you later.
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 7:57 am
by Bernard Fife
Oops, sorry about that! When you have a log it might help, in the meantime we'll revert to the previous version.
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 8:59 am
by Bernard Fife
Addicted,
Here is code with some (
but not all) of the most recent changes backed-out. It should work better than the last code (I am able to shift from reverse to forward gears on my bench, at least).
You might want to try shifting through all the gears before moving, just in case, though.
Lance.
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 9:31 am
by Addicted
Datalog attached. Hopefully its pretty self explanatory...cGear goes straight to 6!
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 11:56 am
by Bernard Fife
Addicted,
Which code is this datalog with? The one I just posted (5.099zv) or the one that wouldn't come out of reverse (5.099ziv)? If it's the most recent one, then I need to back out a few more changes!
Lance.
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 1:20 pm
by Addicted
That's me reversing out into the road this morning, engaging drive, blipping the throttle in sixth, pushing it off the road then reversing into my garage.
I've been out tonight with the latest code and its OK.. Although it still downshifts under hyst
Re: Trigger hysteresis using avload instead of load?
Posted: Wed Mar 25, 2015 3:42 pm
by Bernard Fife
Addicted,
Okay, thanks for that. Obviously I need to rethink the hysteresis thing, and I will get to work on that.
Lance.
Re: Trigger hysteresis using avload instead of load?
Posted: Thu Mar 26, 2015 4:57 am
by Addicted
I thinks whats in our favour is that the issue is very consistant. The run I did last night on the very latest code it shifted back to third every time it went to fourth regardless of the different conditions. ie. high load, low load.. which sort of suggests its not a problem with my shift table. It also always shifts back to third after the same time period ~1 second, then holds third for quite a while and shifts back to fourth.. then its usually fine..
It has done it on the 2-3 shift, but its very very rare.. it certainly hasn't done it recently
I'm sure you solve it soon
Re: Trigger hysteresis using avload instead of load?
Posted: Thu Mar 26, 2015 7:05 am
by Bernard Fife
Addicted,
That's an excellent description of the issue, and makes me think of a coupe of possibilities that I hadn't thought of before. Hopefully I will have some fixed code for you soon.
Lance.
Re: Trigger hysteresis using avload instead of load?
Posted: Thu Mar 26, 2015 8:10 am
by Bernard Fife
Martin,
Something may have finally clicked in my thinking (
but I know I have said that so often it has lost all meaning!). The attached code tests a theory that explains what is going on better than those hypotheses I had previously.
I'll explain the change after you test it (
if you are willing to test, of course), as there's no sense going into a long explanation if it isn't the problem.
If this code doesn't help, could you try a little experiment for me? Could you try using solely TPS for load? This should be under 'General Settings -> Throttle and Load Factors ->MAP vrs TPS for LOAD' (
slide it all the way to the left). That might affect the 3-4-3-4 behavior, and it would be very instructive for us.
Lance.