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By jackscr
#47282
HI,
Is there any way we can have an adjustable VSS output on the arduino mega based ecus,for things like Electric power steering?
By maisdc
#48524
jackscr wrote:
Fri Dec 25, 2020 12:58 pm
HI,
Is there any way we can have an adjustable VSS output on the arduino mega based ecus,for things like Electric power steering?
Assisted electrical directions do not use vss pulse as information for progressivity, they use speed information through messages on the can network, with specific ID for each vehicle manufacturer / model. Which makes it impossible to decipher each existing vehicle.
By jackscr
#48526
maisdc wrote:
Sun Feb 21, 2021 3:05 pm
jackscr wrote:
Fri Dec 25, 2020 12:58 pm
HI,
Is there any way we can have an adjustable VSS output on the arduino mega based ecus,for things like Electric power steering?
Assisted electrical directions do not use vss pulse as information for progressivity, they use speed information through messages on the can network, with specific ID for each vehicle manufacturer / model. Which makes it impossible to decipher each existing vehicle.
Maybe some of them do for newer vehicles but who cares about those I don't think anyone is using a speeduino in a 2015 vw golf or whatever... I am talking about the most used EPAS in retrofitting and that is the Opel Corsa B / C . and that one uses VSS singal
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By PSIG
#48534
While an existing function might be duplicated and modified for something like EPAS (e.g., VSS > DAC > VVT/Boost Control/etc > PWMout), I would imagine the most flexible and useful could be AUX I/O with added PWM output capability, or just sending the data from Speeduino to GPIO for configured output. 8-) I don't know how messing with AUX would go over with dev's. It was a long road to get them to this point.
By jackscr
#48536
PSIG wrote:
Sun Feb 21, 2021 6:34 pm
While an existing function might be duplicated and modified for something like EPAS (e.g., VSS > DAC > VVT/Boost Control/etc > PWMout), I would imagine the most flexible and useful could be AUX I/O with added PWM output capability, or just sending the data from Speeduino to GPIO for configured output. 8-) I don't know how messing with AUX would go over with dev's. It was a long road to get them to this point.
Yeah no problem ,I mean there are more important things to sort out. I thought I would put it out there as I did not see it requested .
I am managing the vss with a separate arduino nano to convert the signal from a hall sensor on the driveshaft .It is a bit overkill but it was the cheapest / easiest way to get a programmable freq multiplier.
By stum
#48547
I have just put a toyota electric power steering in my sons Suzuki SJ413 play truck. out of a Toyota Corolla. It used the CAN bus for speed. When used with no CAN bus it defaults to about 40% load which works great for us.

If you got your maths right you could just make a multi tooth wheel and feed it directly. As my understanding is the NON abs versions just pickup on the speedo pulses.
By jackscr
#48583
A fixed assistance percentage will not work for me, and yes you are corect about the trigger wheel, but with the arduino I have the option to tune the assistance. The corsa epas has 3 maps based on the vss input. One for low speed(parking) one for mediu speed and one for high speed(highway) but as you can imagine that May not be suitable for every car... A 400hp fwd with diff and slicks is quite a bit different than a 1.1 corsa :lol:

Great, I might buy one now

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