ETB Disable when throttle at 100% for >3 seconds

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Cadence
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ETB Disable when throttle at 100% for >3 seconds

Post by Cadence »

I can reproduce this when running and not running. The logs below are just sitting with the key on. If I hold the throttle at 100% for 3 seconds the ETB disables. It requires a reboot of the Proteus to re-enable.

I have confirmed that both pedal sensors are reading and and the calibrated pedal % is not going over 100%. I have confirmed that both TPS are reading and the TPS % is not going over 100%. I do not see anything funky with the voltage readings on either the TPS or the PPS. This seems to have just started happening after the firmware update recently.


Proteus - 0.4
Firmware - 20211008_163324 Release not snapshot
Tune - https://rusefi.com/online/view.php?msq=689
Logs - https://rusefi.com/online/view.php?log=384
https://rusefi.com/online/view.php?log=383
mck1117
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Re: ETB Disable when throttle at 100% for >3 seconds

Post by mck1117 »

Immediately after this happens, please CAREFULLY touch the ETB driver chip. It might be very hot (150C - no, I'm not kidding). If it is very hot, there are some things we can try.
Cadence
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Re: ETB Disable when throttle at 100% for >3 seconds

Post by Cadence »

ETB chip is indeed getting very hot. I can also feel it getting hot as I put the throttle down. The longer I hold full throttle the hotter it gets until it shuts the throttle.
Cadence
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Re: ETB Disable when throttle at 100% for >3 seconds

Post by Cadence »

Along with the firmware update I increased ETB pwm frequency to try to get it above my ear’s abilities. I just dropped it back to 1500 Hz. That seems to have fixed the issue.
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AndreyB
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Re: ETB Disable when throttle at 100% for >3 seconds

Post by AndreyB »

We can make this safer can we?

https://github.com/rusefi/rusefi/issues/3400
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