SEARCH BLOG: MPG
The Nancy and Harry Show has decided that a nice even... well, no... odd number of 35 mpg for trucks sounds like a good mandate for 2020. Well good for Nancy and Harry!
Now let's look at what we have and what has to change.Let's presume that Nancy and Harry are not going to nitpick and if a vehicle puts gasoline in its tank and gets 35 mpg, it passes the test. Now if E85 is substituted, the actual mileage would probably be:
(35 x .15) + (35 x .65 x .85) = 24.6 mpgThat's because ethanol contains significantly less energy per gallon than gasoline.
So we have to presume that mandating 36 billion gallons of ethanol has nothing to do with better mileage... plus there is the added smog problem and from what we'll produce that 36 billion gallons... all of our corn crop?What kind of technologies will get us to 35 mpg... real 35 mpg?
We know that diesel engines can improve mileage up to 30% or so over gasoline. And hybrid diesel/electric would improve that somewhat more... let's guess up to 35-40% over gasoline. Of course, there might be a little more expense involved.If a truck now gets 17 mpg average [combined city/highway], then a 40% improvement is not enough... it would need a 100%+ improvement which an electric/diesel hybrid can't deliver. So these trucks are out!
If a truck now gets 24 mpg average [combined city/highway], then a 40% improvement almost gets there... so let's take a leap of faith and say that the physics of the situation tells us that an electric/diesel hybrid could reach the holy grail mileage. These trucks would make it.
Oooops! Sorry, none are available.Well, these compact trucks might make it with some tweaks... perhaps by making them smaller. Of course, they might not be good for anything at that point.
How about solar panels in the pickup bed? Of course, that means you couldn't actually put anything into the pickup bed. But since the trucks will be too small to haul anything anyway, why not?So, if you are applauding the Nancy and Harry Show, is it because you think this should be the design of future trucks?
Or is it because you haven't done the math and physics? Nancy? Harry?
I know, I know. Then a miracle happens!..