Sentences with phrase «stoichiometric air fuel»
Petrol engines presently employ three - way catalytic converters that offer NOx reduction rates as high as99 per cent, but this performance is possible only at the stoichiometric air fuel ratio.
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the problem is that the stoichiometric ratio (efficiency ratio) for (fossil) gasoline is 14.7 parts air to 1 part fuel.
When this happens, the air / fuel mixture becomes outside of what is ideal, and perhaps outside of what is even stoichiometric.
Don't forget that under stoichiometric conditions (which all engine manufacturers strive to run at), the air: fuel ratio is quite high (14:1).
Theoretically, a stoichiometric mixture has just enough air to completely burn the available fuel.
As conventional catalytic converters require a stoichiometric fuel - air mixture (lambda = 1), but stratified charge operation uses high excess air (lambda > 1), the CLS 350 CGI is equipped with two NOx storage - type catalytic converters.
This not only helps to suppress catalyst deterioration, but also expands driving range at the optimum, stoichiometric air - fuel ratio.