TPS failures - better designs?

[David Cooley]

As I reply to myself while brainstorming!
How about an optical encoder with analog output... LED and Phototransistor 
with a disk between them that has a gradually denser optical 
characteristic?  as it rotates, it becomes darker (or lighter) and the 
output is a 0-5V signal....


At 09:25 PM 12/1/1999 -0500, you wrote:
>I don't see how a hall effect device could be used as a TPS.  It senses 
>the presence or absence of a magnetic field...  If it was to count pulses 
>as the throttle shaft was rotated to determine position, that may work, 
>until someone started the vehicle with their foot on the accelerator so it 
>thought it was at zero when it was at 50%...
>
>
>At 01:19 PM 12/2/1999 +1100, you wrote:
>>Dear EFI gurus,
>>
>>I was at the wreckers (bone yard?) yesterday. Seems
>>that the Throttle Position Sensor is a common point
>>of failure. Being a novice when it comes to GM EFI
>>hardware, I figured that a better design than a simple
>>pot (potentiometer, or "variable resistor") was in
>>order. Having recently played with a Hall Effect sensor,
>>for ignition pickup, I also figured that a simple TPS,
>>both reliable and robust, could be done cheaply and
>>easily with just such a Hall Effect device.
>>
>>As we all know, "there's nothing new under the sun"...
>>So, here's the EFI content:
>>
>>   Are there any Hall effect TPS sensors around?
>>
>>Or, perhaps a better question is:
>>
>>   Are there more reliable TP sensors than simple pots?
>>
>>TIA,
>>--
>>Peter Gargano
>
>===========================================================
>David Cooley N5XMT Internet: N5XMT at bellsouth.net
>Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
>We are Borg... Prepare to be assimilated!
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>

===========================================================
David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
We are Borg... Prepare to be assimilated!
===========================================================