Chevrolet Volt: The high-tech car that will save Michigan?

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On 25/05/2010 5:54 AM, C. E. White wrote:


From what I understand the Volt cannot do a maximum speed over 65 mph unless it is using batteries. So once the batteries are toast, knock it down to 45 or 50.
Second farce with the Volt, and long term owners will find out is that the batteries should be viewed as consumables. In three years if they perform to 15% of their stated "new" capabilties you might be doing good.
Someone mentioned the other day the gas engine will not charge the batteries. Ooops. Taht makes it unsafe on the freeway.
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The volt is not an electric vehicle. http://en.wikipedia.org/wiki/Chevrolet_Volt
There are a number of hybrid variations.
Hybrids can be parallel or serial. Parallel then both engines can operate directly on the wheels. Serial only uses the electrical engine on the wheels but has an engine to create electricity. Then you have plug in variations of both and then you can load the batteries from the outside.
True electrics do not have a second engine.
There are advantages of both types depending on your needs.
A true electric can be built to be completely different than conventional cars.
Hybrids have a lot of drawbacks from old technologies but as an interim solution they can have their benefits.
The old car companies do not want to build true electrics because they are cheaper to build, lasts longer and are easier to maintain.
Unfortunately the production capacities of true electrics are very very limited and it may take a long long time before they become common and useful.
The technology is ready but the production is not.
Another issue is that old car companies do not have the technology needed, they need a new set of skilled labor.
The maintenance people for old cars do not have the skilles needed either to work on true electrics.
They may not even have the skills needed for the hybrids either.
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On 24/05/2010 9:36 AM, C. E. White wrote:

It doesn't really, but is subsidized by the taxpayers.
Do you mean the Volt can't charge it's batteries? OMG.. LMAO.

It will be cheaper than the Prius a for every Volt sold the taxpayer will cough up the difference. GM, they keep on sucking.
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Once again our friend Canuck is telling us the sky is falling LOL

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It is for GM.
We are back into depression/recession mode, although I submit we never left it because Obama hasn't fixed the causes yet.
On 24/05/2010 2:52 PM, Mike Hunter wrote:

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Once again our friend Canuck57 is telling us the sky is falling LOL

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Kind of, it is speculated that the Volt will switch from charge depleting to charge sustaining mode at some certain percent state of charge. Ideally what this means is that if you are cruising flat and level on the interstate using 15kW the engine will be producing about 15kW+ whatever is required to overcome the generator losses. As you climb hills the battery discharges some and as you descend hills it recharges some but overall its SOC remains the same.
If it were truely able to charge the battery pack ala: 1. run on battery till depletion, 2. run engine and recharge battery to full while driving, repeat. imagine what would happen if you got home or to your destination just as the engine was completing a recharge cycle, there would be no "room" left for any cheaper grid power charging plus the fact that on say an 800 mile drive you would have about 10 full cycles of the battery instead of 1 full cycle plus the minor variations while driving. Also imagine how much the engine would cool off during each 40 mile off cycle, It would have to partially warm back up at the start of each recharge cycle thus not only would the battery be under heavier cycle load but the engine would be subjected to more thermal cycling as well.

The true cost VS Prius would have to be higher. For the Prius series/parallel design using the PSD and 2 motor/generators MG1 is about 1/5th the power rating of MG2. If you look up how the PSD works you will see that this is because most of the engine torque goes directly to the wheels via the mechanical route (the parallel part) while some goes to the wheels via the electrical route (MG1-inverter-MG2, the series route)
With a design like the volt the electrical (series) route is the only path for engine power hence both the generator and motor have to be bigger. The generator has to be sized to match the full engine output and the motor has to be sized for the full acceleration requirements of the vehicle.
This is even before you consider the size difference of the HV battery.
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