Why Cars Don't Get 80 Miles Per Gallo...

Why Cars Don't Get 80 Miles Per Gallon: 4 Reasons

There are 7 comments on the How Stuff Works story from May 2, 2014, titled Why Cars Don't Get 80 Miles Per Gallon: 4 Reasons. In it, How Stuff Works reports that:

The first-generation Honda Insight hybrid, sold from 2000 through 2006, is renowned even today for its ultra-high gas mileage: 52 mpg combined .

Join the discussion below, or Read more at How Stuff Works.

Solarman

La Quinta, CA

#1 May 3, 2014
"Shouldn't the modern equivalent of the Insight, 15 years later, get more like 70 or even 80 miles per gallon?"

Detroit as well as Europe has had small displacement diesel engines for years. It's time to get serious about getting this technology into vehicles as a hybrid drive system. Diesel engines are well proven as the engine of choice for generating power. They can be tuned to a specific RPM range and create the bulk of their power in this range. The other paradigm that needs to be broken is that generators should put out 60HZ power. The military has used 400HZ three phase generator sets for decades. More power, less weight and smaller filtering components adding up to a weight savings per generation system. Get the generation frequency up around 1K to 2K HZ and you can make the generator a little smaller still.

The article also mentions the Corvette, something like, looks pretty but gets poor fuel mileage. Compare the old Corvette to the new Corvette. The new Vets can get somewhere in the 20's for gas mileage, the old ones, well 10MPG was good at that time.

The technology has been available for decades to make that 100 +MPG vehicle. A half liter diesel, that is turbocharged, using the latest ceramic coated piston and cylinders could put out 50H.P.+. Enough to drive the electric hybrid system briskly down the road. How much do you want to pay?
Noitall

Portsmouth, NH

#2 Aug 21, 2014
Diesel motors r heavier than you think
Electrics need light weight
They make lots of low torque but die out up top
Electrics make instant low power
Diesel is still dirty and nasty, ever stepped on diesel and back into your car? It smells forever
Diesels still pollute black particulates
Once they come out with hi comp gas motors
They will make diesel like power , burn cleaner and without turbos and other junk be lighter
Then you will see some big numbers
I thought bmw would go this route to avoid turbos
But they didn't
Solarman

La Quinta, CA

#3 Aug 22, 2014
Noitall wrote:
Diesel motors r heavier than you think
Electrics need light weight
They make lots of low torque but die out up top
Electrics make instant low power
Diesel is still dirty and nasty, ever stepped on diesel and back into your car? It smells forever
Diesels still pollute black particulates
Once they come out with hi comp gas motors
They will make diesel like power , burn cleaner and without turbos and other junk be lighter
Then you will see some big numbers
I thought bmw would go this route to avoid turbos
But they didn't
Wow, how uninformed. Have you stepped in gasoline and back into your car? Diesels have the advantage of performance packages like electronic emissions controls, DPF (diesel particulate filter) and SCR using Urea. The 3.0 liter VM Motori diesel Jeep is using in the Grand Cherokee and RAM 1500 truck weighs about as much as the gas 5.7 liter hemi, it is good for 240 H.P.( 80 H.P. per liter ) and 420 lb-ft of torque. If you look around Ford right now is going smaller with their engine platforms for the gas engines. The F-150 is using a turbocharged 3.5 liter gas engine to replace the small V8 engines of the past. The next mustang upgrade will include a turbocharged 4 cylinder with a rumored output of 300 H.P. Electrics by design have to have either a fairly small battery pack and ICE backup power, most hybrids and the Chevy Volt or a rather large and heavy battery pack, like the TESLA or even the old Chevy EV1 which was originally designed with a 1200 pound lead acid battery pack. All electrics you still have to carry around that battery pack even when it is almost at zero charge.

This is why a diesel in a configuration like the Chevy Volt would be successful. Electric with a diesel engine set to generate maximum power at a specific speed is where diesels excel.
iluvmyVolt

Santa Clara, CA

#4 Aug 25, 2014
My charging cost plus my gasoline cost equate to 125 mpg. Guess that's why the E.P.A. named the Volt the most efficient car that uses gasoline.
Sharptons Savages

Florham Park, NJ

#5 Aug 26, 2014
Me thinks your full of $hit!
liner

Patchogue, NY

#6 Aug 29, 2014
iluvmyVolt wrote:
My charging cost plus my gasoline cost equate to 125 mpg. Guess that's why the E.P.A. named the Volt the most efficient car that uses gasoline.
Probably is, but why aren't they selling? Too expensive maybe?
iluvmyVolt

Santa Clara, CA

#8 Sep 2, 2014
liner wrote:
<quoted text>
Probably is, but why aren't they selling? Too expensive maybe?
No, just uninformed people. I actually still run into people who think the Volt is electric only and needs to be charged again to go more than 40 miles.

Then there is the group that think the Prius and the Volt are the same types of cars. In fact, they are the exact opposites. It takes time to inform people.

The Leaf is losing $800 a month in depreciation because the batteries are failing at a rate that is unacceptable due to not having a thermal management system.

http://gas2.org/2014/06/26/why-are-used-nissa...

My Volt still gets the same range as the day I bought it. Note in the last post I had a 45+ mile range day. Pretty common for me in summer. My son's Volt averages 49 miles in range because he owns one of the more efficient 2013 Volts.

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