Acceleration surging 450h

[CapriV]

Hi gang.
My car has started this intermittent acceleration problem at full throttle.

Check out this video. You can hear the intermittent bursts as it climbs the RPM



Here are my parameters, don't know how to download these to a file so it's a screen grab collage!

Ive been trying to datalog for days now and the wifi connection is so bad I get a few seconds of logging and it freezes.

Anyways, anyone else ever have this happen. ?

Edit, this issue went away using mg2 only, and mg 1 + 2.
Shows up in blending mode.

[tom91]

I need logs to diagnose this.

So only with mg1 + 2 in blending, this can indicate an unstable RPM signal.

if you mean there are two stages of "acceleration" this is down to ramping of throttle leads to ramping of motors based on throttle percentage.

[CapriV]

Hi Tom I will try again for logs.
I haven't been able to plot or log anything via the web interface, ever.

In the vid I posted, I'm applying full throttle. You can hear it stabbing up through the RPM.
To me it feels like one motor is accelerating as it should and the other is cutting in and out.

I know.. cant do anything to help without logs... I'll keep working on it...

[Bigpie]

Use something like https://www.ebay.co.uk/itm/267167770235 and the python tools, much more reliable for logging. See viewtopic.php?t=2907

[CapriV]

Hi.

I cannot get a log to work.

I have just enabled both mg1 and mg2, the issue goes away when I do this.

[johu]

Moved to Lexus forum. Please put some thought into choosing a matching forum

[CapriV]

Sorry.
This problem is now happening during blended and mg1+2
Still trying to get a decent log.
I think i caught it happening here around row 79 onwards for a short bit.
The potnom is decreasing even though this is most likely WOT event as the voltage is dropping.
Sorry I don't have other values, I have to reload the page to try and reconnect then lose the checked boxes I want to log
Doing these things when driving can be challenging lol.
Anyways, will keep trying.

intermittent2.csv

(6.62 KiB) Downloaded 7 times

intermittent2.xlsx

(15.43 KiB) Downloaded 10 times

Same settings as pictured above except mg1+2 selected and throtramp at 100%