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Old 09-27-2019, 09:27 AM   #377 (permalink)
Bicycle Bob
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Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,570

Appliance White - '93 Geo Metro 4-Dr. Auto
Last 3: 42.35 mpg (US)

Stealth RV - '91 Chevy Sprint Base
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Quote:
Originally Posted by JSH View Post
<snip> While the public talks about miles per gallon the standards are in grams of CO2 per mile (or KM, or HP-Hour, etc) It isn't the volume of fuel going into the tank that matters it is the weight of the carbon coming out of the exhaust. Burning a gallon of gasoline creates 8.8 kg of CO2. Burning a gallon of diesel creates 10.1 kg of CO2. A gallon of diesel produces 15% more CO2 than a gallon of gasoline because diesel is more energy dense than gasoline. When regulatory bodies around the world started regulating g/km of CO2 they took away the advantage that diesel cars have by burning more energy dense fuel.

I hope that helps clear up the confusion.
The main advantage of diesel is that it can run at a higher compression, and achieve higher carnot numbers.
Not having a throttle plate is not necessarily an advantage. It could also be replaced by a windmill. I'd really like to see an Eaton electric supercharger used as a generator as well. The numbers on my envelope are quite encouraging.
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