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M1 DBW - Throttle Pedal Voltage Filter

PostPosted: Sat Apr 27, 2024 5:42 pm
by Exigeman
Hi
We have been chasing a "lurching/kangarooing" issue at 2-3K with timing and fuelling but cannot overcome it.
Setting the Throttle Pedal Main Voltage filter to 40ms improves it and setting to 80ms completely solves it.
I understand this setting is not ideal ? What issue can be introduced ?
Is this an fault probably with the sensor itself at that pedal position (Bosch cylindrical type) or can something else influence this ?
Many thanks

Re: M1 DBW - Throttle Pedal Voltage Filter

PostPosted: Mon Apr 29, 2024 10:39 am
by Stephen Dean
Hi,

Do you have any logging showing this occuring?

Re: M1 DBW - Throttle Pedal Voltage Filter

PostPosted: Fri May 17, 2024 10:52 pm
by Exigeman
Thanks Stephen for the answers on the filter .. now another question following that.

Current setup has one pot decreasing in voltage while the other increases, which I understand is the correct setup.
However the increasing channel is not returning the same voltage as the decreasing and that is creating the tracking error as I cannot get full travel on the pot.
I have checked my two spare pots and they both have same characteristic, so is it ok to switch the output around and have both channels decreasing ?

Re: M1 DBW - Throttle Pedal Voltage Filter

PostPosted: Sat May 18, 2024 6:37 pm
by Exigeman
Solved by adjusting the pedal stops and getting enough voltage to avoid errors

Re: M1 DBW - Throttle Pedal Voltage Filter

PostPosted: Mon May 20, 2024 10:38 am
by Stephen Dean
Hi,

There is no requirement for the channels to be opposing, a fair number of OEM DBW pedals and Servos have the channels as both rising, sometimes with an offset between the two, or with a different slope between the Main and the Tracking.