Quote:
General Rules of Emission Analysis
If CO goes up, O2 goes down, and conversely if O2 goes up, CO goes down. Remember, CO readings are an indicator of a rich running engine and O2 readings are an indicator of a lean running engine.
If HC increases as a result of a lean misfire, O2 will also increase
CO2 will decrease in any of the above cases because of an air/fuel imbalance or misfire
An increase in CO does not necessarily mean there will be an increase in HC. Additional HC will only be created at the point where rich misfire begins (3% to 4% CO)
High HC, low CO, and high O2 at same time indicates a misfire due to lean or EGR diluted mixture
High HC, high CO, and high O2 at same time indicates a misfire due to excessively rich mixture.
High HC, Normal to marginally low CO, high O2, indicates a misfire due to a mechanical engine problem or ignition misfire
Normal to marginally high HC, Normal to marginally low CO, and high O2 indicates a misfire due to false air or marginally lean mixture
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http://www.crypton.co.za/Tto%20know/...emissions.html
Ce inteleg eu de aici este ca e posibil sa existe o situatie in care desi senzorul lambda sa indice amestec sarac (el masurand doar nivelul de oxigen!), amestecul de fapt poate sa fie prea bogat (nu se precizeaza daca poate fi vina unui piston sau a intregului ansamblu).
Nu ma prind cum poate fi indicata problema, probabil cu cate un senzor lambda pe evacuarea fiecarui piston ?
Interesant articol, ceaa ce ma duce cu gandul ca langa orice dinamometru serios ar trebui sa existe un analizor de noxe.
Cand sarac e prea bogat... sau cum putem sa ne pacalim cu un wideband lambda
