Anybody know the chemical reaction that will involve urea ?
I was under the impression that emissions testing at 50K miles is mandatory, and that 120K is voluntary for Fed tier II bin 5. Not positive though. I had not heard of the 'car stops if maintanence not performed' urea canister solution, but it makes a lot of sense, as long as it can not be easily bypassed.
Comparing CARB, Euro, and US Federal Emissions standards is a pain, mostly because the US uses pollutant/distance, while Euro is pollutant/fuel.
Here are some numbers that help to figure it out. First, Euro III and IV, CARB, and Fed Tier II bin 5:
To get an idea what 2008 Euro V will require,
EURO V is the emission standard for cars that will be introduced in the EU in 2008 that limits car emissions to 2 g/kWh of NOx and 0.02 g/kWh of PM (Particle Matter).
EURO IV is the emission standard for cars that will be introduced in the EU in 2005 that limits car emissions to 3.5 g/kWh of NOx and 0.02 g/kWh of PM (Particle Matter).
These numbers are in gr/kWh, but you can apply ratios to the graph above. As you can see, Euro V Nox is still 4.5x greater than Tier II Bin 5; and since PM did not change, Euro V PM is 4x greater than Tier II Bin 5. AFAIK, PM is easier for the diesel manufacturers to clean up than Nox.
R2-E2, 2G Prius.
Highway/City/Husband/Wife MPG:
56.5, as of 12/2005, 26K miles
Jac Nasser, Ford President: "We are planning to launch a hybrid version of
this car [P2000] within this year [1998]. We will also make FCEV available in
2004."
Re: GM Greens Up Saturn Image with "Mild Hybrids"
