GEAR SHIFT CUT

Discussion and Support for MoTeC's M1 series ECUs

GEAR SHIFT CUT

Postby dr350 on Wed May 07, 2025 9:39 am

Hello, we are experiencing issues calibrating the ignition cut during gear shifting on our Motec M142 ECU. We have a load cell in the link between the gear lever and the gearbox (attached photo of M1 calibration). The problem is that the data does not consistently indicate when the ignition cutoff is activated, resulting in variable force readings. This makes it difficult to determine the correct timing for the gear shift.

We are recording the gear, gear shift, shift lever force, and ignition cut status channels at 20 Hz. Would it be possible to add the ignition and gear position sensor channels to the existing channels at the same 20 Hz frequency? What additional channels and sampling frequency would be recommended to analyze and diagnose the issue of inconsistent ignition cut activation during gear shifting?

We're probably doing something wrong.

Other questions:

What effect does the estimated gear shift have with a gear sensor installed? We have all the gear ratio data loaded.

What effect would setting different gear tolerance values ​​have on this problem? What would be the most logical values ​​to start with?

Thanks, best regards!!
Attachments
lever.jpg
LEVER FORCE SENSOR SETUP
lever.jpg (59.46 KiB) Viewed 128 times
data.jpg
DATA
data.jpg (206.29 KiB) Viewed 128 times
dr350
 
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Re: GEAR SHIFT CUT

Postby Stephen Dean on Wed May 07, 2025 12:55 pm

Hi,

When you talk about adding channels, are you meaning in the Time Graph, or the Logging?

We really need to see logging of the issue, rather than screen shots.
Stephen Dean
MoTeC Research Centre Melbourne, Australia
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Re: GEAR SHIFT CUT

Postby dr350 on Wed May 07, 2025 8:44 pm

Thank you very much for the response.

Regarding the channels, I meant editing the datalog, adding channels if they're not listed, or grouping the necessary channels on the same frequency.

Attached the data files.

https://1drv.ms/f/c/450d38319a16998a/Es ... w?e=0YudJK

Thanks,best regards!
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Re: GEAR SHIFT CUT

Postby Stephen Dean on Thu May 08, 2025 1:03 pm

Hi,

The first thing that you should do is upgrade to the latest version of the GPR-DI Firmware, you are running a very old version that has had a lot of updates done to it since release, including in the Gear Shift functionality.
Stephen Dean
MoTeC Research Centre Melbourne, Australia
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Re: GEAR SHIFT CUT

Postby dr350 on Fri May 09, 2025 9:35 pm

Hi

Thank you very much for your response.
I understand. I've always wanted to do it, but I've been very wary and afraid of updating the firmware. What precautions should I take? Is it possible I need to configure other parameters. Is there a tutorial,pdf,etc? Do I need another license?

Thanks,Best regards!
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