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Open Roads Forum  >  Tech Issues

 > Just an observation and wondering

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Horsedoc

Dixie --- N. Georgia

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Posted: 06/21/21 02:26pm Link  |  Quote  |  Print  |  Notify Moderator

I have driven the Toyota Prius when they first came on the market years ago. I liked it and it ran fine with no problems, even in the summer.
If, there is nothing (NO engine) but an electric motor to make these new electric cars go, what powers the A/C and on these days here in the South with 90 percent humidity and 90 degrees?
I guess I am just old school and don't understand how this kind of setup could be of value for anything other than driving to the market and back.

ScottG

Bothell Wa.

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Posted: 06/21/21 02:28pm Link  |  Quote  |  Print  |  Notify Moderator

It (AC) runs on an electric motor.

wanderingaimlessly

Buggs Island lake

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Posted: 06/21/21 02:45pm Link  |  Quote  |  Print  |  Notify Moderator

The same battery that motorvates you from point A to point B, but in the summer, they better be closer together, with fewer traffic standstills.

lryrob9301

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Posted: 06/21/21 02:58pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingaimlessly wrote:

The same battery that motorvates you from point A to point B, but in the summer, they better be closer together, with fewer traffic standstills.


Correct, in hot or cold weather your mileage between recharges will decrease by about 50%. Just one of the things they don't tell you in the advertising, like for every 10mph you drive over 35mph your recharge mileage decreases by 8%. So when you drive 65mph your recharge mileage is decreased by 24% from the advertised optimum mileage between recharges.


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Old-Biscuit

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Posted: 06/21/21 03:26pm Link  |  Quote  |  Print  |  Notify Moderator

DC Compressor for A/C Unit

DC Heater Element/grid for Heat


Is it time for your medication or mine?


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Lwiddis

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Posted: 06/21/21 03:35pm Link  |  Quote  |  Print  |  Notify Moderator

Just like current Chevy 1500 truck power steering…electricity. See a pattern here?


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jdc1

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Posted: 06/21/21 06:57pm Link  |  Quote  |  Print  |  Notify Moderator

News on the EV front! Long Beach California charges its city buses by....picking up passengers. Wireless technology has improved so much, charging is as simple as pulling up and..that's it. Just like a smart phone (not mine) or watch, you can charge effortlessly. The charging system is embedded in the road. This will become more widespread soon....mostly in metropolitan ares, of course.

DrewE

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Posted: 06/21/21 07:53pm Link  |  Quote  |  Print  |  Notify Moderator

jdc1 wrote:

News on the EV front! Long Beach California charges its city buses by....picking up passengers. Wireless technology has improved so much, charging is as simple as pulling up and..that's it. Just like a smart phone (not mine) or watch, you can charge effortlessly. The charging system is embedded in the road. This will become more widespread soon....mostly in metropolitan ares, of course.


It's highly doubtful that it will become too widespread. Inductive charging is significantly less efficient than a direct electrical connection (especially at the distances the bus is from the pavement, and the imprecision in its stopping), and having a big enough electromagnet there to supply a usable amount of charge very quickly starts to make things look and act like an induction range or MRI machine. I bet the majority of the charging for the busses still happens at the depot during off hours.

Wireless charging makes a lot more sense for razors, toothbrushes, cell phones, and similar low power devices.





time2roll

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Posted: 06/21/21 08:15pm Link  |  Quote  |  Print  |  Notify Moderator

Horsedoc wrote:

I have driven the Toyota Prius when they first came on the market years ago. I liked it and it ran fine with no problems, even in the summer.
If, there is nothing (NO engine) but an electric motor to make these new electric cars go, what powers the A/C and on these days here in the South with 90 percent humidity and 90 degrees?
I guess I am just old school and don't understand how this kind of setup could be of value for anything other than driving to the market and back.
Separate electric motor drives the A/C. In many EVs the cooling system also serves as a heat pump when needed. The A/C with a separate motor is more efficient as the compressor can be driven at the correct speed instead of up and down at the engine speed. The cooling system in most EVs also cools the battery when needed. The cooling system works quite well using about 5% of the range in hot conditions. EV can be pre-cooled or pre-heated before you drive using utility power if connected. Even inside your closed garage.


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ktmrfs

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Posted: 06/21/21 08:37pm Link  |  Quote  |  Print  |  Notify Moderator

even in non hybrids electric power steering, and even AC, brake booster, water pump etc. are becoming common. reduces engine drag, only operates when needed, improves fuel economy. No reason to run the power steering when stopped, and less assist is needed at higher speeds,

On our acura mdx hybrid everything typically driven off the serpentine belt is GONE, all now electric.


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