rusefi.com

So ...

I need to help with my current config.
Engine "cutt-off" on drag race, when I'm shift up, and I can't see why..
(tps 100 to 0 to 100)

Can anybody help me explain why..??

RPM, VE, TPS and other things looks good in log.
(due to "over-fuel" .. or why ..?)

Drag race start at aprox. 260sec

Thanks.

It looks like when you lift, the fuel cuts off and then comes back on for one quick blip and then it's off for good.
This is just a wild guess, but it may have to do with fuel cutoff. Maybe you exposed a glitch, or maybe your settings are screwy. Your rpm settings with 2500rpm and 2300rpm don't seem to make much sense anyway. I would turn off the fuel cut-off and see if that helps.

Reminder about https://rusefi.com/online/ as tune & logs sharing platform

You're hitting fuel cut because it would be over 100% duty cycle.

Notice how the "fuel: base" channel is up at ~38ms, when there are only 28.5ms worth of time to inject at the current engine speed.
Now: why are we trying to add all that extra fuel? I think something is going wrong with engine load acceleration enrichment. All your sensors look OK, so I don't see where that extra fuel is coming from other than engine load accel enrichment.

It may be worth disabling engine load accel, and relying on exclusively wall wetting enrichment. It seems for lots of engines using tau = 0.3, beta = 0.3 is a reasonable starting point. Beta controls how much correction happens immediately after a change, and tau controls how long that adjustment lasts for.

OK ...
So, now I see 3 vriants of enrichment.
TPS , Wall wetting and Engine Load.

Now I need to do, is try to use one of them .. (RIGHT .. ?)
Set all to zero in Engine load, then Engine Load Acceleration Tapper Graph will be ignored - at all

Try to disable TPS enrichment, same way..
(tps map have number 37 )

..and then try to run ...
My engine have ITB, just for record.

So ..
Can anybody check this ..??

(I have no idea, how it works and what that numbers are.. )

@JRD McLAREN next time you post tune and logs as attachment I will remove those.

Next time please try posting your tune and logs on rusEFI online at https://rusefi.com/online

OK...

Tune is online ...

Something like this will disable everything other than wall wetting enrichment.

Thanks, I will test it ..

..and when I can use TPS accel ..??

Maybe will be better, if anybody write documentation .. on wiki page ..

JRD McLAREN wrote: ↑

Fri Aug 07, 2020 5:33 pm

Maybe will be better, if anybody write documentation .. on wiki page ..

Please confirm that you have located https://rusefi.com/wiki/index.php?title=Manual:Software:Fuel_Control and https://github.com/rusefi/rusefi/wiki/Acceleration_Compensation

I found these pages sometime before.

It looks little bit outdated.
and some description for "numbers" Length Cycles, Accel Threshold will be helpful.

I have no idea, if it must be 0.55 or 1.74 or 34.578 ...
(need some hint for these settings)

Gotcha, will try to improve under https://github.com/rusefi/rusefi_documentation/issues/74

Thank you for your patience

Thanks.

I will try some settings this weekend, from other configs.
(Online "archive" )

Maybe one wish or hint for accel enrichment strategy ...
about MAX fuel value ...

As mck1117 described me, I have fuel cut due to max duty cycle ...
required 38ms from TPS>TPS table, but max available inj. time is 28ms.

Is able "cut" or "shrink" maximal accel enrichment time to current max. available injection time ( duty cycle 100% ) . ..??
or ...
is possible have inj. duty cycle over 100% when accel enrichment occur / run ..??
WITH NO FUEL CUT

(it is my idea at this moment and if it is not possible, please ignore it )

JRD McLAREN wrote: ↑

Fri Aug 07, 2020 7:55 pm

Maybe one wish or hint for accel enrichment strategy ...
about MAX fuel value ...

As mck1117 described me, I have fuel cut due to max duty cycle ...
required 38ms from TPS>TPS table, but max available inj. time is 28ms.

Is able "cut" or "shrink" maximal accel enrichment time to current max. available injection time ( duty cycle 100% ) . ..??
or ...
is possible have inj. duty cycle over 100% when accel enrichment occur / run ..??
WITH NO FUEL CUT

(it is my idea at this moment and if it is not possible, please ignore it )

That's a pretty good idea - I'm already working on improving this part of the firmware, so I'll add that to my list of things to consider. Thanks!

So this is my actual test settings..
engine revs up relatively good ...

Please guess why

...preparing for microRusEFI ...

Is EGO Closed loop working..?? or I'm making something wrong ..??

can you post your tune?

check online ...

last two ... 20210311 and 20210628 versions ...

https://rusefi.com/online/view.php?msq=584
https://rusefi.com/online/view.php?msq=583

found anybody anything .. ??

new settings ..and still have no fun..

https://rusefi.com/online/view.php?msq=597

Guys ...

I need help with FSIO formula for power steering pump.

Conditions are:
Vbatt > 13V
RPM > 700
VSS < 60kmh

I have set output #1 - 14 GP Out 5 (used as 12V High-side)
and now I'm totally lost ..

I need to "wrote something" into "Setting"
- set#1 700
- set#2 13
- set#3 60

and then "FSIO Formulas" will be:
rpm 1 fsio_setting >
vbatt 2 fsio_setting >
vss 3 fsio_setting <

.......... ?

or it can be set via console:
set_fsio_expression 1 "rpm > 700" and "vbatt > 13" and "vss <60"

We are moving from FSIO to https://github.com/rusefi/rusefi/wiki/Lua-Scripting

Let me make some progress today/tomorrow to make your request easier in Lua

I am still working on all this

https://github.com/rusefi/rusefi/issues/3387 was fixed along the way

next step would be https://github.com/rusefi/rusefi/issues/3391

Ok ...

First two of FSIO conditios /setting working for me ..
at this moment ..

I have problem with VSS formula ...

(and little hardware hardware problem)
(not general)