V8 Ignition

[lee9966]

Interesting to learn about the different sensor types.

What method does the sensor for automotive anti-lock brakes use? It too reads a toothed gear.

Thanks, Lee

 

[Noitoen]

Here's a 1/4" pickup I use in a industrial project
http://pt.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=0304172

 

[Lakc]

Interesting to learn about the different sensor types.

What method does the sensor for automotive anti-lock brakes use? It too reads a toothed gear.

Thanks, Lee

Origionally, they used a voltage generating pickup, like old electronic ignitions. Then they moved to hall sensors triggered from the gap. Lately, yet another option, as a cost saving measure, they use thin magnet rings with alternating N/S poles like brushless electrical motors use. At least those are the ones I am currently familiar with.

 

[jpeter]

That's not a hall sensor, it's a pickup coil. They are used in diesel engines to check the speed for the governor

Check out this link for hall effect gear sensors.
http://www.allegromicro.com/en/Products/Categories/Sensors/ats.asp

I think coil, reluctor, pickups were used in early electronic distributors. The reluctor pickup is kinda large for use in a really small distributor. Remember it's a coil and as such requires some wraps of wire and a core. No doubt though they'd work. Autos used them for a long time.

 

[jpeter]

Hey, wanna see my 1 inch distributor sparkn'? Here's a youtube link.
[ame]http://www.youtube.com/watch?v=SBem_o_GqTA[/ame]