Leaf full stack not reversing properly

[Rustybkts]

Just testing the Fwd/Rev power and the latest trial mod is excellent with plenty of power in reverse.

On the Leaf drive unit application I feel that the Throtramp units of %/10ms should ideally be %/100ms as I have it set to 1% and still is pretty fierce with easy wheelspin in Fwd on my front wheel drive 106 running on 260v.
Parameter limits are 1 - 100.

Regarding the water heater.
Not sure what is happening with the LIN comms as it is displaying tmpheater 207C, udcheater 25v and powerheater 20320W yet the heat is on with 12v on the heater power supply input but appears to be uncontrollable.
I hear a clonk from the heater which I assume to be an overtemp cutout when its hot.

@tom91 do you still require the CAN logs for the reverse power test as I assume they are not associated with the heater.

[tom91]

Regarding the water heater.
Not sure what is happening with the LIN comms as it is displaying tmpheater 207C, udcheater 25v and powerheater 20320W yet the heat is on with 12v on the heater power supply input but appears to be uncontrollable.
I hear a clonk from the heater which I assume to be an overtemp cutout when its hot.

Do not post that in this thread. go back to your other thread.

Just testing the Fwd/Rev power and the latest trial mod is excellent with plenty of power in reverse.

On the Leaf drive unit application I feel that the Throtramp units of %/10ms should ideally be %/100ms as I have it set to 1% and still is pretty fierce with easy wheelspin in Fwd on my front wheel drive 106 running on 260v.
Parameter limits are 1 - 100.

Okay it would be worth looking at then, will have a review of code. Timing cannot change, the task is ran every 10ms so possibly add decimals below 1.

Yes provide a CAN log confirm the behaviour now in reverse.

[J0hannes]

Houston, wehave TORQUE

I did this test just by holding against the brake and vehicle not really moving. Now we have symmetrical torque

CAN trace from the test

FWD_REV_160325-1203.csv

(1.02 MiB) Downloaded 492 times

Parameters

params_160325-1154.json

(2.27 KiB) Downloaded 559 times

[Rustybkts]

Tested the car running Fwd for a couple of seconds then reverse up a steep slope. Loads of power in reverse but fully controllable.

[tom91]

Can one of you please do a free run of the motor with reverse gear selected in the Zombie to see what motor rpm it limits at.

[J0hannes]

I'll see if I can log this on Tuesday.

Can one of you please do a free run of the motor with reverse gear selected in the Zombie to see what motor rpm it limits at.

[J0hannes]

So the RPM limit in reverse seems to be about 3500

CAN log:

NoDS_WOTinR_Filtered_11A_1D4_1DA.csv

(183.9 KiB) Downloaded 561 times

Params:

params_231TH_180325-1711.json

(2.27 KiB) Downloaded 470 times

[vitecd]

CAN trace

what are you using for CAN decoding?

[tom91]

what are you using for CAN decoding?

SavvyCan and a dbc file from Dalas github https://github.com/dalathegreat/leaf_can_bus_messages

[vitecd]

Thank you, very usefull

[vitecd]

Okay so made both limits the same lets see what that does. Make sure not to break anything.

https://github.com/damienmaguire/Stm32- ... 6c70b2aa69

Hi, Tom,
Having same issue, reversing with foot on the ground. Should I try to replace the [1] byte and recompile? My SW is 2.22a

[tom91]

Should I try to replace the [1] byte and recompile? My SW is 2.22a

Sure you can make the changes as quoted.

[JaniK]

Why are we still saying to the leaf motor that we are pressing the brake pedal while driving?

In the 0x1D4: Brakepedalpressed =1

Also if there is same torque limit both ways, will it mess with the regen?

From Leaf OEM display, regen goes to about 28kW in B mode:

2014 leaf gen2 display for motor power kW

[tom91]

Why are we still saying to the leaf motor that we are pressing the brake pedal while driving?

In the 0x1D4: Brakepedalpressed =1

No idea it seems to have no impact on the inverter.

Also if there is same torque limit both ways, will it mess with the regen?

Yes this is why its now removed in the vehicle testing branch and will be added into a release upcoming.

[tom91]

Fix implemented in the release now to remove the reverse limiter sent over CAN to the Leaf inverter.

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