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Old 05-05-2024, 10:10 PM   #1981
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I find myself wondering why governments don’t continually ratchet up fuel economy standards, including on light trucks, and let the auto industry figure out the best way to meet them. Electric, hybrid, smaller, more efficient ICE, whatever it takes to lower emissions without mandating a specific technology.

In previous decades CAFE standards drove significant improvements, albeit with some really crappy vehicles initially.

Is it because with such a massive fleet of ICE vehicles on the road we need to mandate electric to meaningfully reduce average emissions?
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Old 05-06-2024, 12:22 AM   #1982
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Originally Posted by edslunch View Post
I find myself wondering why governments don’t continually ratchet up fuel economy standards, including on light trucks, and let the auto industry figure out the best way to meet them. Electric, hybrid, smaller, more efficient ICE, whatever it takes to lower emissions without mandating a specific technology.

In previous decades CAFE standards drove significant improvements, albeit with some really crappy vehicles initially.

Is it because with such a massive fleet of ICE vehicles on the road we need to mandate electric to meaningfully reduce average emissions?
A few reasons, but the biggest is time. No country could hit their commitments by gradually lowering emissions. If we want to hit below 2 degrees warming, cars will need to be emissions free soon. Gradual tightening of emissions has only lead to bigger cars and flat emissions
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Old 05-06-2024, 01:48 AM   #1983
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Does anyone have an estimate of the energy require to liquefy hydrogen?
the theoretical minimum would in the 3-4 kWh/kg range if memory serves and the best out there now is 6 or so kwh/kg. That's still only 10-20% of the total energy content, but then it takles a lot of energy to keep it there and you hace a lot of loss of hydrogen at every tansfer point and simply through storage as it boils off. The losses added up are huge

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Interesting story on new venture by FuelCell Energy and Toyota Motor North America on Launch of "Tri-gen" production system at the Port of Long Beach. Tri-gen uses biogas to produce renewable electricity, renewable hydrogen, and usable water.
Pretty interesting actually

https://finance.yahoo.com/news/fuelc...113000504.html
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Interesting. I wonder what the source is for the biogas and the deficiency of the process?


This process isn't all that new (see this from 2016: https://www.energy.gov/eere/fuelcell...ation-fountain). Essentially, they buy natural gas made from organic matter in an anaerobic digester (about 2-4x cost of regular natural gas). Then, feed that biogas through a specialized fuel cell that ends up making electricty, hydrogen, heat, and a small amount of water. The thing is, there's very little biogas available today and using it to make hydrogen (in a very expensive way), ship it all over the place just to turn it back into electricity inside the vehicle is both very inefficient and a poor use for something really needed elsewhere. This is another project to try to kickstart a FCEV market by supplying fuel when most other fueling stations have closed. Toyota is desperate for FCEV to happen as they've spent so much money on it.
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Old 05-06-2024, 08:08 AM   #1984
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That's what I was wondering, the source gas seems not easy to get.
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Old 05-06-2024, 09:23 AM   #1985
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That's what I was wondering, the source gas seems not easy to get.
There's a lot of digesters out there, as biogas from fermentation is usually the starting point for all bio fuels. And it's even relatively "cheap" at anywhere from $2-20/MBtu, in fact it's cheaper than natural gas on some places in Europe. The issue is that the cheap stuff is only cheap because it uses easy to digest waste that the waste facilities either offer for free or pay the biogas company to pick up. There's only so much water treatment plant waste close to any digester. You can do it with cellulosic waste like corn stalks for example, but it suddenly becomes waaaay more expensive.
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Old 05-06-2024, 11:17 AM   #1986
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Originally Posted by edslunch View Post
I find myself wondering why governments don’t continually ratchet up fuel economy standards, including on light trucks, and let the auto industry figure out the best way to meet them. Electric, hybrid, smaller, more efficient ICE, whatever it takes to lower emissions without mandating a specific technology.

In previous decades CAFE standards drove significant improvements, albeit with some really crappy vehicles initially.

Is it because with such a massive fleet of ICE vehicles on the road we need to mandate electric to meaningfully reduce average emissions?
I think sometimes the bigger issue isn't technology or physical constraints but marketing. I think some people that roll coal literally love the fact it's basically loud and obnoxious. In the long run, I think PHEV will be the future. I think the Japanese automakers are right on this one. Relying too heavily on a single technology for long term change is creating an issue in the pure EV market.

IMO the long run (and I've thought this for a while before Tesla truly dominated) is a modular vehicle that is comprised of 3-5 primary components (depending on the definition of primary components). After a while IMO people will be able to consider keeping vehicle cockpits and then just upgrading their interface/motors etc. IMO it could revolutionize the repair market. Imagine if you could basically go somewhere, standardize an EV design where the electric motor/battery pack swap within an hour or two, then send the vehicle back. Regardless of what issues you had, you could in theory just address it by swapping it all out. Then the repair company/automaker could on their own time investigate the swapped out components to figure out if they could refurbish, recycle etc. whatever is pulled out. This should have helped the rotting EV issue from before.

TBH, I thought Tesla was going to go in this direction when they first said that their biggest breakthrough in production was basically designing a vehicle that was like a battery pack on a skateboard. I was kinda surprised they discontinued it after a while. I thought if they finished off that modular concept and allowed people to upgrade vehicles to basically the latest and greatest, they'd have continued to dominate the vehicle market for more than a decade.
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Old 05-06-2024, 11:20 AM   #1987
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Gradual tightening of emissions has only lead to bigger cars and flat emissions
This was also do to massive flaws with the vehicle emissions regulations that left trucks as a loophole.
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Old 05-06-2024, 01:20 PM   #1988
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I don't think its marketing. Sure there is an amount of education that needs to be done to get people to understand the EV, but I'm with Fuzz on this one. The obsession of going EV only, and not PHEV first is going to make the transition harder.
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Old 05-06-2024, 06:56 PM   #1989
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I think sometimes the bigger issue isn't technology or physical constraints but marketing. I think some people that roll coal literally love the fact it's basically loud and obnoxious. In the long run, I think PHEV will be the future. I think the Japanese automakers are right on this one. Relying too heavily on a single technology for long term change is creating an issue in the pure EV market.

IMO the long run (and I've thought this for a while before Tesla truly dominated) is a modular vehicle that is comprised of 3-5 primary components (depending on the definition of primary components). After a while IMO people will be able to consider keeping vehicle cockpits and then just upgrading their interface/motors etc. IMO it could revolutionize the repair market. Imagine if you could basically go somewhere, standardize an EV design where the electric motor/battery pack swap within an hour or two, then send the vehicle back. Regardless of what issues you had, you could in theory just address it by swapping it all out. Then the repair company/automaker could on their own time investigate the swapped out components to figure out if they could refurbish, recycle etc. whatever is pulled out. This should have helped the rotting EV issue from before.

TBH, I thought Tesla was going to go in this direction when they first said that their biggest breakthrough in production was basically designing a vehicle that was like a battery pack on a skateboard. I was kinda surprised they discontinued it after a while. I thought if they finished off that modular concept and allowed people to upgrade vehicles to basically the latest and greatest, they'd have continued to dominate the vehicle market for more than a decade.
I was hoping that GM would go down the "skateboard" route in the early 2000s when they introduced the Autonomy platform although it was fuel cell and not battery.
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Old 05-09-2024, 01:57 PM   #1990
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I don't think its marketing. Sure there is an amount of education that needs to be done to get people to understand the EV, but I'm with Fuzz on this one. The obsession of going EV only, and not PHEV first is going to make the transition harder.
PHEVs are allowed in the current laws requiring all electrified cars by 2035.

Here's the thing - by 2035, PHEVs will be the expensive option to be used only where BEVs literally cannot work.
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Old 05-10-2024, 02:02 PM   #1991
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PHEVs are allowed in the current laws requiring all electrified cars by 2035.



Here's the thing - by 2035, PHEVs will be the expensive option to be used only where BEVs literally cannot work.
I actually think it may be sooner than that.

In China, EVs are almost at purchase price parity with no incentives. Their cars have way more to offer from a technology standpoint too and prices are plummeting. Again, that may just be China, but they manufacture both kinds of cars and are able to make EVs cheaper
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Old 05-10-2024, 06:49 PM   #1992
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I actually think it may be sooner than that.

In China, EVs are almost at purchase price parity with no incentives. Their cars have way more to offer from a technology standpoint too and prices are plummeting. Again, that may just be China, but they manufacture both kinds of cars and are able to make EVs cheaper
Isn't the major incentive in China that EV aren't taxed at purchase whereas ICE vehicles are taxed based on displacement?
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Old 05-10-2024, 06:51 PM   #1993
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Isn't the major incentive in China that EV aren't taxed at purchase whereas ICE vehicles are taxed based on displacement?
Yes, but they're approaching the point where they're at parity regardless of incentives
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Old 05-10-2024, 07:07 PM   #1994
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Yes, but they're approaching the point where they're at parity regardless of incentives
What’s the average car weight they sell. Essentially EVs save more by being lighter than ICE engines so a culture of smaller vehicles will hit price parity before larger vehicles and larger vehicles will benefit more than PHEVs.
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Old 05-10-2024, 10:39 PM   #1995
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What’s the average car weight they sell. Essentially EVs save more by being lighter than ICE engines so a culture of smaller vehicles will hit price parity before larger vehicles and larger vehicles will benefit more than PHEVs.
I'm confused what you mean. EV's are generally heavier than ICE due to the batteries. Regardless, purchase price parity before incentives is right over the horizon. Maybe even this year

And I wouldn't really say "culture of small cars" so much. One of the fastest growing segments is luxury minivans

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Old 05-29-2024, 08:48 PM   #1996
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Amazing innovation from China's BYD with their new PHEV technology. Non-stop on one charge and a full tank of gas from Miami to New York.

https://twitter.com/user/status/1795656955379208631

https://twitter.com/user/status/1795740569916015093

https://twitter.com/user/status/1795517007804485788
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Old 05-29-2024, 11:19 PM   #1997
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I don't know if I'd call it revolutionary since it's been done already a number of times. But it makes sense; smallest engine that makes sense to generate enough electricity to run at whatever speed and have an electric only powertrain. I bet the engine only makes like 50hp. I wonder what size battery it has.
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Old 05-30-2024, 10:10 AM   #1998
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No idea on battery size. I know it has a 70 L tank, which is unnecessary. No one needs to go 2400km on a tank. But 2.9L per 100km is pretty outstanding. I use about 4.8L per 100km in my non plug in hybrid, but it is essentially two propulsion engines instead of one, which doesn't really make a lot of sense.
Really interesting.
When you say it's been done numerous times, are you referring to a proof of concept or a consumer product?
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Old 05-30-2024, 10:45 AM   #1999
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I think the current Mitsubishi Outlander does it (serial hybrid I think is what they're called). Though I think it has a clutch to engage the ICE engine to the drivetrain under certain conditions still so I guess it's borderline? The Volt was like that too. I think the BMW i3 had a model like that too.

The newest Dodge RAM hybrid will be like that.. the engine connects only to a generator, there's no mechanical linkage to the wheels.
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Old 05-30-2024, 12:19 PM   #2000
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The Chinese EVs look really impressive. No surprise that was part of the driver for the US raising their EV import tarriff to 100%.
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