Trigger hysteresis using avload instead of load?

[Addicted]

Have you tried this Lance? currently shifts are controlled by avload, but the hysteresis by instantaneous load, how do you think it would behave if both were controlled by avload?

[Bernard Fife]

Addicted,

This should be easy to do, I will have a look.

Lance.

[Bernard Fife]

Addicted,

Attached is 5.099z code that allows you to select to use either the instant load or the average load for shift hysteresis:

Monitor_5099z.abs.s19

(83 KiB) Downloaded 951 times

GPIO_MShift_5099.ini

(278.02 KiB) Downloaded 910 times

The setting is under 'General Settings -> Shift Factors -> Load value for Hysteresis' where the options are to:
- Use instant Load
- Use the short-term Load average

There is some interaction between the average load and the decel settings, so this might not work the way you want it to. You might want to try disabling the decel mode by setting the 'General Settings -> Throttle and Load Factors - > Max. sLoad in Decel Mode' to zero (0).

The code attached is also virtually untested (except briefly on my bench). If you want to give it a try, let me know how it works for you.

Lance.

[Addicted]

Thanks Lance, I'll give it a try. Like you say, it may not work very well at all, but I wanted to be able to try something before you release 5.1

[Addicted]

Is avload the same as sload?

[Addicted]

Hmmmm. Hysteresis is still being turned off sooner than I expect. What other factors will turn off hysteresis?

[Bernard Fife]

For shifting, the hysteresis is based on load and speed: http://www.msgpio.com/manuals/mshift/V5tune.html#gs

[Addicted]

There must be other factors that turn of hysteresis as mine always turns off almost as soon as the shift is completed and the speed and load figure deltas are within the the hysteresis limits. I've even tried doubling the limits but it still turns off.

Annoyingly something has stopped working in the megasquirt unit so at the moment I cannot start the car so trans testing is on hold so I cannot test the new CAN wiring ( beldin shielded twisted pair) as I'm hoping its CAN issues turning hysteresis off (decel spikes?)

[Bernard Fife]

Addicted,

Do you happen to have a log with the latest code?

Lance.

[Addicted]

Addicted,

Do you happen to have a log with the latest code?

Lance.

5.099z? no.. it was while loading it that the megasquirt ecu died.. (coincidence!)

Until I can drive again with the new code and the new CANbus wiring all bets are off....