help with this term

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rc079 - 19 Apr 2007 01:14 GMT

hi maybe this topic doesn't go here but anyway i does anybody know what
does "warm up oxidation catalytic converter" means? i'm trying what it
exactly is but i don't find nothing, i know it has something to do whit
catalytic converter but what it exactly is? is it the same as three way
catalytic converter? i hope anyone can answer something thanks

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rc079

http://www.automotiveforums.com

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MasterBlaster - 19 Apr 2007 01:46 GMT

> hi maybe this topic doesn't go here but anyway i does anybody know what
> does "warm up oxidation catalytic converter" means? i'm trying what it
> exactly is but i don't find nothing, i know it has something to do whit
> catalytic converter but what it exactly is? is it the same as three way
> catalytic converter? i hope anyone can answer something thanks

Sound like MAYBE it's a "pre-converter", or "light-off" converter.
It takes a while for the main converter to get up to operating temperature,
so car makers put a smaller converter as close to the engine as they can,
to help heat up the exhaust, and "light-off" the main converter sooner.

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Tegger - 19 Apr 2007 01:55 GMT

mx.nodomain.com:

It is not the same as a three-way cat.

Exactly where did you see this term?

Right now it sounds like a "pre-cat", one that deals only with hydrocarbons
and carbon monoxide, but not nitric oxide.

A three-way cat would handle all of HC, CO and NO.

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Tegger

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