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American Emissions Regs

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datalas:

--- Quote from: "Eeyore" ---
Nah, I blame the States, Europe was guilty of only following suit.  :wink:

--- End quote ---


No change there then :(

Range Rover Blues:
Oh and IIRC it was brought about by the simple rule that is a car has a means to detect the fuel/air ratio then the engine must be tuned to run stoichiometric (try saying that after too much happy-juice).

Funny then how even cat-equiped cars run rich at idle and at more than 70% wide open throttle, which IIRC was the criticism of lean burn at the time.

Eeyore:
It's getting 'em to run rich that's the secret to the modern Cat. I can't remember the chemical exchanges (not my field) but modern engine strategies have a real hard time keeping the rich/lean thing going without burning the cat out.

At leats with modern cars the heat-up time for the cat has been greatly reduced (which don't half help with that 'eggy' smell!  :lol:  ).

Cheers
 8)
Eeyore

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