Tesla’s cars are not especially energy efficient:
https://cleantechnica.com/2018/06/30/what-are-the-most-effic...
Changes to Models S and X allow them to travel longer without larger batteries
61–70 of 521 posts
Re: Changes to Models S and X allow them to travel longer without larger batteries
#62This "continuous deployment" for cars must be a logistical nightmare. To do repairs for a given vehicle, keeping track of what parts are backward compatible would be challenging. What if it's a compatibility breaking change? Then keeping inventory for older cars would become problematic. Unless they do design with maximum compatibility. Then it gets interesting as upgrades are possible. While B.EV cars maintenance is…
Is it any worse than what other manufacturers deal with? The 2019 Honda Accord shares some parts with the 2018 Honda Accord which shares some parts with the 2017 model... when something breaks in my Honda the first question is "do they still make/use this part or did they change it in newer models?"
Re: Changes to Models S and X allow them to travel longer without larger batteries
#63Earlier quoted context omitted.
I'd bet that the TPMS (tire pressure monitor/sensor) in the wheels is an off the shelf component purchased from a top-10 supplier in the automotive industry, and the problem was as simple as not having the TPMS programmed for the car. This is the same problem you can encounter if you replace all four TPMS in most any medium to high end car manufactured after about 2006, and the tire shop forgets to use their handheld…
This sort of complexity is why I like pre smog era cars
Ehh, I never want to go back to the days of points and carbs.
Re: Changes to Models S and X allow them to travel longer without larger batteries
#64This "continuous deployment" for cars must be a logistical nightmare. To do repairs for a given vehicle, keeping track of what parts are backward compatible would be challenging. What if it's a compatibility breaking change? Then keeping inventory for older cars would become problematic. Unless they do design with maximum compatibility. Then it gets interesting as upgrades are possible. While B.EV cars maintenance is…
Is it any worse than what other manufacturers deal with? The 2019 Honda Accord shares some parts with the 2018 Honda Accord which shares some parts with the 2017 model... when something breaks in my Honda the first question is "do they still make/use this part or did they change it in newer models?"
Gee, I hope they have some kind of system to track that. Maybe software even?
Re: Changes to Models S and X allow them to travel longer without larger batteries
#65Earlier quoted context omitted.
It's a permanent magnet motor. It's an IPM design so some amount of the torque comes from reluctance, but the majority of the efficiency is from the permanent magnets providing the field rather than having to burn energy through the induction motor's copper bars to provide it.
Which is interesting. I wonder what the math looks like, since induction motors (without the heavy magnets) tend to be lighter. I can see why they'd avoid a rotor-coiled motor, since that comes with lifetime constraints.
As I understand it, the permanent magnet motor is more efficient at low fractions of maximum torque/power output. So, when cruising, the rear motor will be powered down. When accelerating heavily, the rear motor can kick in.
Re: Changes to Models S and X allow them to travel longer without larger batteries
#66Earlier quoted context omitted.
Is it any worse than what other manufacturers deal with? The 2019 Honda Accord shares some parts with the 2018 Honda Accord which shares some parts with the 2017 model... when something breaks in my Honda the first question is "do they still make/use this part or did they change it in newer models?"
Gee, I hope they have some kind of system to track that. Maybe software even?
I find it hard to imagine they wouldn't
Re: Changes to Models S and X allow them to travel longer without larger batteries
#67For metric folks, this equates to nearly 600km. That's about as much as I want to drive in the space of a single day. Conceivably however, automated driving could mean doing longer distances. And at a cost much less than an airfare - just a lot more in time.
Actually they're quoting 660km on https://www.tesla.com/en_AU/models/design#battery
Re: Changes to Models S and X allow them to travel longer without larger batteries
#68Earlier quoted context omitted.
I'd bet that the TPMS (tire pressure monitor/sensor) in the wheels is an off the shelf component purchased from a top-10 supplier in the automotive industry, and the problem was as simple as not having the TPMS programmed for the car. This is the same problem you can encounter if you replace all four TPMS in most any medium to high end car manufactured after about 2006, and the tire shop forgets to use their handheld…
This sort of complexity is why I like pre smog era cars
Aren't those the cars that made the smog tho?
Re: Changes to Models S and X allow them to travel longer without larger batteries
#69So it sounds like the range increase is for new cars? (Other comments made it sound like a software update to existing cars)
I still wish there was more focus on range over acceleration, obviously electric motors don't suffer from general efficiency impact as ICEs do (an ICE with superior acceleration seems to take an efficiency hit at all speeds), but how much of that "faster acceleration" impacts efficiency over the course of driving a few hundred miles.
Re: Changes to Models S and X allow them to travel longer without larger batteries
#70Earlier quoted context omitted.
Rivian has yet to make a single Truck. It is vaporware until they have more than just numbers.
Are Tesla owners really this sensitive? I mean they do have prototypes out there, it's not like they're making up what the mileage is, they clearly have demoed that it works, it's just about producing the vehicles now.
> it's just about producing the vehicles now.
That is the hardest part, and all that matters. Anyone can make one concept car. Not everyone can make hundreds of thousands of them per year.