Wheel Speed Sensor Resolution
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TECH Regular
Joined: Dec 2020
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From: Ohio
Wheel Speed Sensor Resolution Howdy y'all,
Made a bracket to bolt in a wheel speed sensor to my front wheels to be able to run traction control
Made it so wheel speed sensor picks up one the inner ring of bolts (5), or the outer ring that holds the rotor (8)
Does anyone know of minimum resolution to accurately run traction control from front and rear wheel speed differences?
Made a bracket to bolt in a wheel speed sensor to my front wheels to be able to run traction control
Made it so wheel speed sensor picks up one the inner ring of bolts (5), or the outer ring that holds the rotor (8)
Does anyone know of minimum resolution to accurately run traction control from front and rear wheel speed differences?
Thread Starter
TECH Regular
Joined: Dec 2020
Posts: 423
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From: Ohio
That is brilliant, may I see a picture?
And what would happen if I ran 5 or 8 as appose to making or getting something off the shelf to work with a higher resolution like 20+?
I was planning on only using it 10~15 mph +
And what would happen if I ran 5 or 8 as appose to making or getting something off the shelf to work with a higher resolution like 20+?
I was planning on only using it 10~15 mph +
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Joined: Dec 2004
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From: Florida
i couldnt find a picture so ill have to take another next time im out in the shop.
the resolution can be debatable. if you get really high resolution the computer can see it fine but can it control your power fast enough? it will end up spending a lot of time waiting for the next ignition event to retard or cut. thats where running real high rpm can help too, you can make power changes quicker.
<trigger warning, ev talk>
one of the things that fascinated me about the tesla plaid i had was how fast it could control power delivery. i suspect it was controlling the motors at kz kind of update rates* and could see slip extremely quickly. it was fast enough even in the rain at wot you could feel it working to stay stuck, but it felt like it was doing it with only a few degrees of wheel slip at a time. a gas/ice engine simply cant change its power output that fast regardless of how many teeth you have on your wheels.
*this made me curious so i briefly looked at some vesc (bldc controller used in electric skateboards and similar stuff) info and they seem to be in the 100s of hz ranges of control.
the resolution can be debatable. if you get really high resolution the computer can see it fine but can it control your power fast enough? it will end up spending a lot of time waiting for the next ignition event to retard or cut. thats where running real high rpm can help too, you can make power changes quicker.
<trigger warning, ev talk>
one of the things that fascinated me about the tesla plaid i had was how fast it could control power delivery. i suspect it was controlling the motors at kz kind of update rates* and could see slip extremely quickly. it was fast enough even in the rain at wot you could feel it working to stay stuck, but it felt like it was doing it with only a few degrees of wheel slip at a time. a gas/ice engine simply cant change its power output that fast regardless of how many teeth you have on your wheels.
*this made me curious so i briefly looked at some vesc (bldc controller used in electric skateboards and similar stuff) info and they seem to be in the 100s of hz ranges of control.
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Joined: Dec 2004
Posts: 2,177
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From: Florida
another fun note i just thought of. i recently got my driveshaft sensor working correctly so i spent an hour or so playing with the haltech pid traction control using front right wheel sensor compared to driveshaft. it was a little rainy that day and i was driving around the perimeter of my property which is mostly grass. when i turned left it didnt care but when i turned right it would cut ignition. i had the settings aggressive but i thought it was an interesting/noteable occurrence. i havent had time to revisit and continue to tune it.
Thread Starter
TECH Regular
Joined: Dec 2020
Posts: 423
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From: Ohio
What style differential do you use?
That is interesting indeed, I'll have to check mine out when I get mine set up
Still winter and non driving conditions here. And I still don't have the car set up and ready yet
But excited for first start
That is interesting indeed, I'll have to check mine out when I get mine set up
Still winter and non driving conditions here. And I still don't have the car set up and ready yet
But excited for first start
