Mileage for Extended Range Mach-E Models Revealed in EPA Emissions Certifications

[Nak]

but bursts are typically very short and therefore a small percent of total miles traveled is spent accelerating hard.

You are clearly not having enough fun!

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[Nak]

dbsb3233, Do you have efficiency data on the electric motor Ford uses? In my work on electrified off-highway heavy equipment, the sweet spot on the e-motor efficiency curve can be higher RPM than most might believe. Be careful you don't apply 100 years of ICE/Trans experience to electrified/no trans powertrains.

I think this comes from the Porsche Taycan having a two speed transmission which most assume to be the reason it has better efficiency at 80 mph than single speed EVs. This assumption may be in error of course.

It's my guess that gearing on many EVs is based on optimizing efficiency on the EPA test cycle. I'd think--and this is just a guess--that dbsb3233 is correct in his belief that taller gearing might increase highway range, albeit at the expense of around town range. Most people don't really care about the latter, but the EPA testing does. The only way reasonably easy way to know for sure would be to mount taller tires on one of two otherwise identical Mach-e's and do a side by side efficiency test at freeway speeds.

 

[efisher]

Nothing personal, I know you're just a cog in the machine, but Ford is doing a really poor job of launching the Mach E, and that includes communicating.

I understand that Ford is a big, old, tired, lethargic bureaucracy, but seriously, the Communications Dept BS really needs to stop.

Ford's offer to "share" and spoon feed us some information "later this month" is really inadequate. How about some honesty and transparency instead of watered down corporate-speak?

We've all just witnessed what happens when a slow moving company thinks they can control and restrict the flow of information on some rigid corporate timeline without any regard for what's happening in real time.

Kudos to Ford for insulting and pissing off what should be your most loyal Mach E brand ambassadors!

I really do not agree with any of your arguments. (But I would not mind getting a surprise coffee mug in the mail. ?)

 

[dbsb3233]

dbsb3233, Do you have efficiency data on the electric motor Ford uses? In my work on electrified off-highway heavy equipment, the sweet spot on the e-motor efficiency curve can be higher RPM than most might believe. Be careful you don't apply 100 years of ICE/Trans experience to electrified/no trans powertrains. Many of the "rules of thumb" have been turned on their heads with EV's. It is possible that the peak efficiency of the powertrain can be achieved at 70 mph, then offset by air drag, so the over-the-road mi/kWh may not be very different at 65, 70, 75 mph. The measurements I have done on my Kona indicate that the penalty for high speed is not as much as I would expect based on V-squared equation for drag, for example. Aggressive acceleration does have its penalty, but bursts are typically very short and therefore a small percent of total miles traveled is spent accelerating hard.

No, I've just read that in multiple articles on the subject. And I actually meant relative to ICE. While ICE tends to hold it's MPG efficiency at higher speeds (actually improving up to around 70 MPH), BEVs usually lose efficiency, rather significantly at 70+ MPH.

 

[dbsb3233]

That's not all bad. We found our new favorite restaurant at the coast because it had a free charger. It can all be part of your mindset. Is the trip a chore, or an adventure? You're part of something new; take advantage of that. We planned a trip to Northern Vancouver Island this summer--postponed until next summer because of Covid--where there are mountains and no Tesla superchargers. That's part of the fun. 10 years from now road tripping in an EV will be just as bland as ICE road trips are now. Enjoy the adventure and the sense of helping to bring something new into the world.

It'll be more of a challenge, for sure. Challenges can be fun.

Of course, all the places we'll be forced to stop in a BEV we can easily stop at in an ICE if we wanted to, so I wouldn't suggest it's any sort of bonus on road trips. It's definitely a drawback to have to stop more often, for longer time, not be able to go as many places, not be able to change plans on the fly as easily, and not pick hotels we'd otherwise prefer.

But that also doesn't mean we can't live with those limitations. We'll see how we like it on the first road trip. Easy for us to go either way since we'll have a Mach-E and an Escape sitting in the garage to choose between. Either way though, the Mach-E will be great around home, which is most of our miles.

 

[DBC]

No, I've just read that in multiple articles on the subject. And I actually meant relative to ICE. While ICE tends to hold it's MPG efficiency at higher speeds (actually improving up to around 70 MPH), BEVs usually lose efficiency, rather significantly at 70+ MPH.

You're confusing drive train efficiency with MPGe. The point being made is that drive train efficiency could be higher at 70 MPH than at 50 MPH (I doubt it is BTW) and the MPGe would be lower at 70 MPH because the "drag of drag" increased faster than the increase in efficiency. In this regard, if an electric drive train is 80% efficient at 20 MPH, there isn't a lot of headroom to become more efficient at higher speeds.

 

[Woeo]

“exit this way”
or
“Why so negative?”

”...this is the biggest vibrator I’ve ever been in.”

 

[Shayne]

No, I've just read that in multiple articles on the subject. And I actually meant relative to ICE. While ICE tends to hold it's MPG efficiency at higher speeds (actually improving up to around 70 MPH), BEVs usually lose efficiency, rather significantly at 70+ MPH.

Moral of the story; slow down old man. Take in the sights and cruise in quite comfort. Sounds better than a escape.

 

[dbsb3233]

You're confusing drive train efficiency with MPGe. The point being made is that drive train efficiency could be higher at 70 MPH than at 50 MPH (I doubt it is BTW) and the MPGe would be lower at 70 MPH because the "drag of drag" increased faster than the increase in efficiency. In this regard, if an electric drive train is 80% efficient at 20 MPH, there isn't a lot of headroom to become more efficient at higher speeds.

Whatever we want to call it, BEVs usually lose efficiency (translating to range) at high speeds at a much higher rate than ICE. Which matters because 300 miles of BEV range isn't anywhere close to 300 miles at 70+ MPH. That's the only reason this is even an issue.

And it's why most BEVs are shaped like airplane wings rather than SUVs and other popular shapes, to maximize aerodynamics and squeeze every extra mile out of their limited ranges. While ICE vehicles don't need to do that as much because they don't drop off nearly as much at high speeds.

 

[dbsb3233]

Moral of the story; slow down old man. Take in the sights and cruise in quite comfort. Sounds better than a escape.

I prefer to leave it up to each person to decide which compromises and trade-offs they're willing to make and which they aren't. I know in our case, out fully-loaded Escape Titanium is pretty nice too, so it's not like a dramatic upgrade to drive the MME. But there will be some cool new tech. That's probably the biggest plus. And of course around home, the home charging is a big plus. On the road though, it's a much tougher call because there's a lot of drawbacks that require compromise.

Pros and cons both ways. But it's great to have that choice, which we'll make based on our preferences (not because someone else tells us we need to, thank you very much).

 

[Bookworm214]

Does this report say what size wheels and tires are used during testing?
Engineering Explained

 

[kdryden99]

Another reason to switch to EV, was at a client's office today when i looked out the window and saw this about an hour ago

 

[kdryden99]

who cares about EPA range if i can avoid this

 

[SteveUk]

who cares about EPA range if i can avoid this

Yeah i've had enough of petrol/gas stations. Too much hassle

 

[dbsb3233]

who cares about EPA range if i can avoid this

Car fires can happen whether ICE or EV. But they're also extremely rare in both. Not really something I worry about either way.

In a relative sense, I'm more concerned about drunk drivers and txters.

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