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Boost cut should have hysterisis #4529

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ElDominio opened this issue Sep 5, 2022 · 8 comments
Closed

Boost cut should have hysterisis #4529

ElDominio opened this issue Sep 5, 2022 · 8 comments

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@ElDominio
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Client is riding the boost cut limit, making it activate/deactive very slightly on the top end. Example here:
https://rusefi.com/online/view.php?log=1028

ECU should disable injection for an amount (user configurable) of boost before enabling again, as to reduce confusion of misfire vs actual cut

@mck1117
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mck1117 commented Sep 5, 2022

yeah I hit the same thing the other day where I was getting very "buzzy" boost cut due to rapidly cycling on/off

@mck1117
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mck1117 commented Sep 5, 2022

TODO after #4541: do we care about configurable hysteresis, or is fixed fine?

@ElDominio
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I always say configurable cause a 10kpa hysteresis on a car that make 150kpa total is not the same as 10kpa on a car that makes 300

@ElDominio
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Sstill relevant

@ElDominio
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ElDominio commented Apr 2, 2023

STILL RELEVANT

(x) = hysterisis

if hard cut is 240kpa, and (x) is 20,
when the ECU sees 240kpa, fuel/ign will cut, and stay cut until 240-20=220kpa is reached

@ElDominio ElDominio changed the title All hard cuts (boost cut especially) should have hysterisis Boost cut should have hysterisis Apr 7, 2023
@ElDominio
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image

in area
https://rusefi.com/online/view.php?msq=1438&dialog=limitsAndFallback

image

A delay would be nice too but that's another separate ticket lol

@rusefillc
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@ElDominio poke?

@ElDominio
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Boost cut has hysterisis! Yay!

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