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Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob #5347377 02/11/20 05:42 PM
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wemay Offline OP
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Great video



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Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347405 02/11/20 06:04 PM
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paulri Offline
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Can someone explain his first argument to me?

I see he is saying that the energy contained in a gallon of gas, is equivalent to the energy contained in 13 times that gallon jug's volume, in li-ion batteries. But is this apples to apples? these batteries are going to be recharged. Over the lifetime of the car, I'm sure that these batteries will expend a massive amount of energy, equivalent to many many many gallons of gasoline. It makes no sense to talk of a rechargeable battery's energy production, for one cycle of charge/discharge.

His argument about weight impresses me even less. I am aware that my highlander is heavier, because of its battery (not sure what kind it is). But it is helping me convert breaking power into energy that will improve my MPG, so I'm still ahead of the game, compared to the same vehicle w/o the hybrid tech. So he can crunch all the numbers he wants, but I'm not sure his case is proven.

Or have I missed his points?

Last edited by paulri; 02/11/20 06:04 PM.

2005 Toyota Sienna LE; 171,000 miles
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Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347410 02/11/20 06:10 PM
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skyactiv Offline
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What about swapping the battery at a gas, I mean battery station like large warehouses do in forklifts?


Wife: 15' Audi A4 quattro 6 speed manual
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The rude guy that points out reality


Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: skyactiv] #5347424 02/11/20 06:33 PM
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y_p_w Offline
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Originally Posted by skyactiv
What about swapping the battery at a gas, I mean battery station like large warehouses do in forklifts?

Not sure how practical that is. It's not like swapping out a FuelRod.

Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347428 02/11/20 06:37 PM
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Lou_Boyle Offline
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His argument is really hosed up because he is arguing energy density on a heat basis. If all you are doing is heating the car interior - fine. But on a mechanical work output basis the gasoline can only be converted to mechanical energy at 35-40% efficiency by the absolute best gasoline engines, whereas electric motor efficiency is easily twice that. Then we get into the possibility of electric energy recover from braking during city driving and the "usable" energy from gasoline takes another ding. I'm NOT an EV evangelist, but this guy is comparing apples to bowling balls.

Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347441 02/11/20 06:48 PM
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Rmay635703 Offline
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As of late he seems to be beating dead and decomposing horses

Sort of like the EV pickup going up a mountain pulling a 40’ trailer 85mph
60 minutes of verbal diarrhea he spouted.

Maybe he gets more subs by creating drama where there is none?

In any event His content as Of late seems to be following an agenda as opposed to things of actual interest. Quality has gone downward here.

Maybe next he will explore how much energy is released if we burn the lithium in the battery?

Or he could explore this concept
https://ecomodder.com/forum/showthread.php/thoughts-using-electric-unicycles-35348.html
It’s about as valid

Last edited by Rmay635703; 02/11/20 06:54 PM.
Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347452 02/11/20 06:59 PM
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samven Offline
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You need to think of your battery pack as a tank just like a gas tank. But full or empty it weights the same. So your full tank would be the same as having a 2 gallon tank in a car even with the inefficiencies. When you plug in you fill the tank when you go to the gas station you fill the tank the difference is one take 30 sec the other take multiples of hours. But the car with the gas still weights less. The other thing that I did not see pointed out and that no one seems to mention is the real gorilla in the room. Imagine for a min that everyone went out tomorrow and traded their gas car for an electric. Also imagine there are enough charging stations to accommodate them, how many brown out and black out do you think you would suffer through in the first week, how many new nuclear power plants do you want in your city or coal fired power plants. Considering there are already large areas of the country that suffer brown outs when everyone turns on their AC and rolling blackout to conserve power and avoid crashing the grid and no one has built a new nuclear plant in years. For now electric cars are a boutique item with unimagined consequences.

Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347482 02/11/20 07:29 PM
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vw7674 Offline
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The battery pack is pretty much two sub-average weight people travelling with you.
Everywhere.
And the brake regen, most people drive a loop. to destination(s) & home, so every hill you regen on is another load you just put on the pack.
Barring breakthrough battery tech that's always three years away, it's a wash at the end of the day.

Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347503 02/11/20 07:49 PM
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KrisZ Offline
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Not sure where some of you are getting that he's wrong. Energy density and volume are legitimate engineering concerns when it comes to packaging the batteries inside the vehicle. It has nothing do to with recharging. Same as the gas tank, whether empty or full, it takes up the same amount of space, but batteries need to take up a lot more volume. Batteries also weight the same full or empty. Weight is a very big problem to overcome for batteries.

Last edited by KrisZ; 02/11/20 07:53 PM.

2015 Grand Caravan 3.6L - 35k miles.
2006 Mazda 3 2.0L - 186k miles
Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347506 02/11/20 07:53 PM
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He's also comparing that to 1 gallon of gas where as the average car holds 12-20 gallons of gas. If you are low on gas, you can just pull up to a pump, fill up, and go. You can't do that so easily with electric. Like he mentioned at the end, people are lazy.

Last edited by RDY4WAR; 02/11/20 07:54 PM.

"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: RDY4WAR] #5347510 02/11/20 07:55 PM
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KrisZ Offline
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Originally Posted by RDY4WAR
He's also comparing that to 1 gallon of gas where as the average car holds 12-20 gallons of gas. If you are low on gas, you can just pull up to a pump, fill up, and go. You can't do that so easily with electric. Like he mentioned at the end, people are lazy.


If he wanted to compare what 20 gallons worth of gas looks like as a battery, he would run out of room pretty quickly in his garage LOL


2015 Grand Caravan 3.6L - 35k miles.
2006 Mazda 3 2.0L - 186k miles
Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: KrisZ] #5347532 02/11/20 08:17 PM
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Rmay635703 Offline
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Originally Posted by KrisZ
Not sure where some of you are getting that he's wrong. Energy density and volume are legitimate engineering concerns when it comes to packaging the batteries inside the vehicle. It has nothing do to with recharging.

Weight is a very big problem to overcome for batteries.


If you don’t think he is wrong, I guess you also must believe your Ford F-350 should be getting 100mpg and it’s an engineering problem that it doesn’t.

How he frames his argument is wrong, context is ignored.
So the physical portion of what he says is accurate, his conclusions are exaggerated and
I find his recent content about as useful as an Episode of Sesame Street.

He drones on digging in about the same simple tired point unearthing nothing new, restating a problem as more of an issue than it really is.

Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347536 02/11/20 08:23 PM
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Snagglefoot Offline
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I always like the electric car discussions. Firstly, people will charge at home. If they will are away from home and they need to use a charger they will learn to charge only to 80% cutting the time necessary. We now have a sea to sea charging system on the Trans Canada highway in Canada. That’s a lot of coffee and donuts at Timmies. laugh

Last edited by Snagglefoot; 02/11/20 08:25 PM.

If you want the job done right......do it yourself.
Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: RDY4WAR] #5347562 02/11/20 08:56 PM
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JeffKeryk Online Content
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Originally Posted by RDY4WAR
He's also comparing that to 1 gallon of gas where as the average car holds 12-20 gallons of gas. If you are low on gas, you can just pull up to a pump, fill up, and go. You can't do that so easily with electric. Like he mentioned at the end, people are lazy.

Our Model 3 starts the day with a full tank every day.
I never knew how great that was until I experienced it.
It allows for real lazy, I tell ya.

Last edited by JeffKeryk; 02/11/20 09:00 PM.

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Re: Engineering Explained video: Why Gas Engines Are Far From Dead - Biggest EV Prob [Re: wemay] #5347570 02/11/20 09:03 PM
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Dinoburner Offline
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Those of us ho travel in cold hilly mountanous areas will most likely wait until the electrics are better sorted out.


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