But it is no accident that the U.S. Department of Energy and other organizations are focusing most of their research on diesel and HCCI engines.
Looks like the DOE and others agree with me - Diesel is the technology that we need to invest in for the short term goals.
Just look at it this way - what powers the majority of our transportation system? Diesel trucks and trains. Making them even a little more efficient will garner great gains.
Willy Nelson has circumstantial evidence posted that show a 40% increase in efficiency when you switch to BioDiesel (5 mpg to 7 mpg) (Willie Nelson's Biodiesel). A 40% increase in fuel efficiency would be a huge savings for the transportation sector.
Last year, we averaged 382.4 million gallons of fuel a day. At the current average price of $3.00 a gallon, we are spending in the range of $1,152 milllion a day on fuel. Over 60% of that is spent by the transportation sector. So, they are spending $690 million a day on fuel. Cut that 40% and we get over $270 million a DAY saved. That's $98.5 billion a year in savings. We could pay for the biofuel refineries in one year, just off of the savings.
Close on the horizon is the HCCI engine - a next generation diesel engine that is even cleaner and more efficient then standard diesel engines.