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[BI] Tesla's semi truck can be driven around 'like a sports car' - Page 15

post #141 of 334
Quote:
Originally Posted by PostalTwinkie View Post

On a larger commercial EV there isn't much at all to maintain as the fleet owner/operator. In terms of fluids you will have coolant for the battery I am sure but that will require minimal work as it will be a closed system. No transmission, no differentials, no torque converter, and none of the associated work. Depending on the brake technology used there may be some brake related fluid needs, unless the motors do the braking.
Nearly every production EV - future and present have differentials, axles and a reducing gearbox. Every vehicle will have friction brakes no matter what. At low speeds, regenerative braking losses efficiency, and to hold a vehicle still using the motors is neither safe or efficient. An electrical fault will result in the vehicle rolling.
Quote:
Each wheel hub assembly will likely have its own electric motor with only associated power and data lines running to it from the battery, thus the reason for being able to get rid of all the previously mentioned systems. In this configuration it may be possible to, as mentioned above, use the engine configuration for braking - paired with air-brakes maybe.
Hub motors are impractical and add too much unsprung weight. There's a reason why the Model S does not use hub motors.

EV Trucks will still have the same air-brake systems that need inspections, the battery packs will need inspections and maintenance, the motor gearboxes will need maintenance, the motor and battery cooling systems will need maintenance, the HV cables running everywhere will need maintenance.
post #142 of 334
Quote:
Originally Posted by AmericanLoco View Post

Nearly every production EV - future and present have differentials, axles and a reducing gearbox. Every vehicle will have friction brakes no matter what. At low speeds, regenerative braking losses efficiency, and to hold a vehicle still using the motors is neither safe or efficient. An electrical fault will result in the vehicle rolling.
Hub motors are impractical and add too much unsprung weight. There's a reason why the Model S does not use hub motors.

EV Trucks will still have the same air-brake systems that need inspections, the battery packs will need inspections and maintenance, the motor gearboxes will need maintenance, the motor and battery cooling systems will need maintenance, the HV cables running everywhere will need maintenance.

Again, your argument is based off of what is right now while everyone else here is still discussing the future....

thumb.gif

The reason the Model S doesn't have motors in each hub is because we don't have the technology to scale it down small enough to that size. There are already large scale construction/commercial vehicles that have motors in their hubs.

Future technology is just going to continue to scale down and further integrate.
    
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post #143 of 334

Till production semi-truck accelerate faster than your regular gas sport cars... dam

 
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post #144 of 334
Quote:
Originally Posted by djriful View Post

Till production semi-truck accelerate faster than your regular gas sport cars... dam

Well......I mean...


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post #145 of 334
Quote:
Originally Posted by Lady Fitzgerald View Post

Did you read any of the linked articles? Truck owners wouldn't own and maintain the batteries; they would rent them and just swap them out when discharged. The swaps wouldn't take any more time than refueling with diesel, maybe even less. The truck owners wouldn't have to build their own charging stations or do their own testing and PMs.

Any fleet owner that replaced an entire fleet at once would have to be nuts; even more so if it is with brand new technology. There is no point in replacing perfectly good rolling stock so adoption of the new trucks would be gradual. It would be quite a while before in ground tanks would have to be dug up since adoption wouldn't be simultaneously across the board.

Seriously you need to stop with this. Literally every post you ask this same stupid question as though that proves anything. They're not even articles, they're basically just a collection of Musk quotes and Tweets about what he "says" these vehicles are going to be capable of. Its not like the articles are actually challenging any of his claims or there is any kind of independent testing of these vehicles so stop acting like all the questions or issues that people are bringing up in this thread are answered satisfactorily in these "articles". They're not.

Seriously, its like taking a press release from AMD about an upcoming product where they boast about how amazing its going to be and just assuming that everything they say is going to be 100% accurate. Even if they are not lying per se, they aren't fielding pointed questions or telling the whole truth either, and more often than not the actual product we end up with is not exactly what they claimed in the beginning. Musk certainly isn't going to say anything that could possibly put his ideas in any sort of negative light.
post #146 of 334
Thread Starter 
Quote:
Originally Posted by Lady Fitzgerald View Post

The slower you go, the less braking power you can get from regenerative braking. It's the same as engine braking; there is a limit to how much you can get and, the slower you go, the less braking you can get; you can't use engine braking to bring a vehicle to a complete stop, for example, unless you don't mind taking a mile to do so.

Tesla's regen brake cuts out at about 10km/h.

That is very slow. Not as fast as you think it needs to be.

Cool video this guy gained 12km of range while going down 13km of hill thumb.gif
post #147 of 334
Thread Starter 
Quote:
Originally Posted by Majin SSJ Eric View Post

Seriously you need to stop with this. Literally every post you ask this same stupid question as though that proves anything. They're not even articles, they're basically just a collection of Musk quotes and Tweets about what he "says" these vehicles are going to be capable of. Its not like the articles are actually challenging any of his claims or there is any kind of independent testing of these vehicles so stop acting like all the questions or issues that people are bringing up in this thread are answered satisfactorily in these "articles". They're not.

Seriously, its like taking a press release from AMD about an upcoming product where they boast about how amazing its going to be and just assuming that everything they say is going to be 100% accurate. Even if they are not lying per se, they aren't fielding pointed questions or telling the whole truth either, and more often than not the actual product we end up with is not exactly what they claimed in the beginning. Musk certainly isn't going to say anything that could possibly put his ideas in any sort of negative light.


Mind telling me what are article is? rolleyes.gif

Nothing more credible that getting the source from the source. So I am not sure what you are trying to say... Oh we are talking about Evs so we should be negative.
post #148 of 334
Oh good lord.....

I could quote everyone but.... it would be a long messy post....

@FritzGerald -
Quote:
I never said that a truck owner wouldn't still have to maintain his vehicle and its components.

Actually, you said EXACTLY that......
Quote:
The truck owners wouldn't have to do their own testing and PMs
Quote:
You are assuming DOT regs would be exactly the same as they are now for the new technology.

Quote:
On a larger commercial EV there isn't much at all to maintain as the fleet owner/operator.

Uhg..... DOT regulations state that ALL components must be PM'ed.

Want the list? https://www.fmcsa.dot.gov/sites/fmcsa.dot.gov/files/docs/part-396form6.pdf

Steering, Suspension, ANY engine parts (electric or not) Safety devices, Windshield wipers and the squirters are on the list also, Windshield cannot have anything larger than a quarter size ding, The tires, Safety restraints (seat belts), Brakes, Air systems (Most tractors are air brakes), the Air pump, the 5th wheel..... On and On and On......

Why would you people think that because it's all electric that PMs wouldn't matter. The batteries and all the wiring is included in PMs.

The ONLY person I've read a post from that makes any sense is from Majin SSJ Eric. And thank you for that. I will +1 rep

EDIT:

A good PM list

http://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1562&context=extension_curall

Have a nice day people. I'm out of this thread.

Be well take care and go ahead thinking that all electric is going to make PMs and DOTs just go away.....
Edited by ShrimpBrime - 4/30/17 at 8:02pm
post #149 of 334
Thread Starter 
Quote:
Originally Posted by ShrimpBrime View Post

Oh good lord.....

I could quote everyone but.... it would be a long messy post....

@FritzGerald -
Actually, you said EXACTLY that......


Uhg..... DOT regulations state that ALL components must be PM'ed.

Want the list? https://www.fmcsa.dot.gov/sites/fmcsa.dot.gov/files/docs/part-396form6.pdf

Steering, Suspension, ANY engine parts (electric or not) Safety devices, Windshield wipers and the squirters are on the list also, Windshield cannot have anything larger than a quarter size ding, The tires, Safety restraints (seat belts), Brakes, Air systems (Most tractors are air brakes), the Air pump, the 5th wheel..... On and On and On......

Why would you people think that because it's all electric that PMs wouldn't matter. The batteries and all the wiring is included in PMs.

The ONLY person I've read a post from that makes any sense is from Majin SSJ Eric. And thank you for that. I will +1 rep

Your posts make no sense... All you menti9ned has nothing to do with EV and differences with ICE pros and cons. What is your point really?
post #150 of 334
Quote:
Originally Posted by budgetgamer120 View Post

Quote:
Originally Posted by ShrimpBrime View Post

Oh good lord.....

I could quote everyone but.... it would be a long messy post....

@FritzGerald -
Actually, you said EXACTLY that......


Uhg..... DOT regulations state that ALL components must be PM'ed.

Want the list? https://www.fmcsa.dot.gov/sites/fmcsa.dot.gov/files/docs/part-396form6.pdf

Steering, Suspension, ANY engine parts (electric or not) Safety devices, Windshield wipers and the squirters are on the list also, Windshield cannot have anything larger than a quarter size ding, The tires, Safety restraints (seat belts), Brakes, Air systems (Most tractors are air brakes), the Air pump, the 5th wheel..... On and On and On......

Why would you people think that because it's all electric that PMs wouldn't matter. The batteries and all the wiring is included in PMs.

The ONLY person I've read a post from that makes any sense is from Majin SSJ Eric. And thank you for that. I will +1 rep

Your posts make no sense... All you menti9ned has nothing to do with EV and differences with ICE pros and cons. What is your point really?
Quote:
Quote:
I never said that a truck owner wouldn't still have to maintain his vehicle and its components.

Actually, you said EXACTLY that......
Quote:
The truck owners wouldn't have to do their own testing and PMs
Quote:
You are assuming DOT regs would be exactly the same as they are now for the new technology.

Quote:
On a larger commercial EV there isn't much at all to maintain as the fleet owner/operator.
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