Thursday, April 28, 2011

Why Emissions Standards need to be Milage Weighted

Current vehicle emissions standards measure "parts per million" of tailgate exhaust.  That makes sense when you first think about it.  But then when you consider that something like 60% of the rest of the world's automobile sales are in small diesel engines, while in the US it is much less than 10% the response often is - "thats because we have tougher emissions standards" that keep very many of these engines from being approved in the U.S by the EPA, including cars like the 50mpg Subaru Legacy diesel...

The reality is that we have "dumber" emissions standards, and this is why.

The measurement ultimately is based on the "rate of burn".  So, if the "rate of burn" is extended..  meaning 1 gallon's rate of burn, rather than giving you 20 miles of passage, gives you 40 miles of passage, the actual "emissions per mile" is reduced by half.  In the case of small diesels, they may put out 20% more Parts per million, so 120% total emissions, but yield, on average nearly twice the milage per gallon.  So this would mean that the emissions per mile would still be reduced by, approximately, 40% per mile.

Despite this, the 20% increase in "PPM-volumetric measures" rather than "work measured"  emissions keeps Americans burning twice the volume of fuel per mile travelled and actually keeping our "emissions" in both green house gases, and overall particulate volumes 40% higher than the rest of the world per mile travelled in our automobiles.

I will update this with more "specifics" of these equations soon.

Wednesday, April 27, 2011

2 Mpg on a Dually for $12...

This week I decided that I did not need the "dual" in my dodge Dually unless I am pulling a trailer so I asked that the inner rear wheels (left and right) be pulled off during a tire rotation.

Right out of the box I am getting 2mpg better and it might get to 3mpg.  This is 60-90 miles extra on a tank of Gas!  Way cool!