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Automobiles

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Everything posted by Automobiles

  1. I noticed that when on battery only mode the heater would not send hot air even though the temperature selector was all the way up to HI Ugh.... I had to set up a service appointment today to get it looked at. Hopefully it is under warranty. I was reading that it could be something as simple as a blown fuse. (crossing my fingers)
  2. Mountain mode either maintains the current battery state if it's over 50%, or regenerates it back to 50%. Regenerating it back to 50% is a very inefficient use of the ICE as a generator, so Mountain Mode is by far best used when you already have 50+% left.In Hold mode, it will allow the battery to support the ICE when accelerating up to about 2.5% of the battery charge; this means it'll get you up to speed reasonably well in most circumstances without the ICE having to work too hard.In Mountain mode, it will do the same, but with a buffer that's more like 5%.This means in normal driving without long hills, you won't notice any real difference between Mountain and Hold modes.However, on longer hills such as on the motorways and A-roads in Devon/Cornwall, the Lake District, etc., the 2.5% of the Hold mode is very quickly depleted and the ICE then has to rev hard to keep the car going at normal speed; revving hard = inefficiency remember. In Mountain mode, the extra buffer size means that the ICE doesn't have to work so hard, and it's therefore more efficient.An extreme example of this would be some of the really long motorway hills where the ICE simply can't maintain 70mph - it's only an 86ps 1.4 dragging a 1.8 tonne car after all - and at that point in Hold mode the car will lose speed. In Mountain mode it will be able to keep going for longer, hopefully to the top of the hill Mountain mode doesn't really mean "Going up a 1 in 4 hill", it means "Going up long hills at high speed".So... basically I believe Mountain mode is best used on trips where there are long hills at high speed, in which case turn it on when you have 50% of the battery left, then when you get within about 15-20 miles of your destination, switch back to pure EV (Normal) mode. If you've got much less than 50% left, or the hills aren't that long, stick with Hold mode.I noticed significantly lower revs and more battery push using Mountain mode than using Hold mode when going to/from Cornwall at 70mph. - Richard G
  3. The DeLorean was a great looking car. It looked like it should have eaten up the road. It was dreadfully under-powered. It had a non-turbo 2.7 litre Puegot engine with an ass-whooping 130 HP. The car was brushed aluminum which preserved finger and hand prints like a champ. ZZZzzz… x 2.
  4. (the one in the picture may have a modded engine) but even with their biggest engine, it wouldn’t get to 60 MPH in less than 8.1 secondsÂ… ZZZzzzÂ…
  5. \ This could be Ford's worst ever Is this the worst "muscle car" ever built?
  6. I suspect they are already getting cheaper ... especially for those who buy the used electric cars already out there.
  7. Mean Gene gets the Chevrolet Volt on the rack to look at more than itÂ’s propulsion system and learns about the unique construction of balancing low weight with production costs . . . Â
  8. 4:22, Bad News Racing and also Wait4me performance can hack the Volt so the speed limit is more like 120MPH 7:37, the battery is not that limited in cold weather, as long as it is heated with wall power before your trip. Yes if it's something like 0F or colder and the pack is also that cold it might not work well and will need the engine, but otherwise if heated with wall power before your trip, engine is not necessarily needed. The engine being on in cold weather is known as ERDTT (Engine Running Due To Temperature). For 2011 and 2012 Volts it comes on at 25 F or colder. 2013 and newer Volt you can configure it for either 35F or 15F. The purpose of the engine coming on is NOT to heat the battery, since it can't, engine coolant does not heat the battery. Rather the engine comes on to heat the cabin, which is annoying if you want to save gas by just having the seat warmers on but leaving the vent heat off. You can bypass ERDTT by replacing the climate control ambient air temperature sensor with a fixed resistor, by the front grille. This tricks the car into thinking it is warmer than it really is. If it's super cold out, below -10F for instance and it hasn't been plugged in so it can't keep the battery warm from shore power, you may really need the engine as there just isn't enough energy / low enough resistance in the pack to provide adequate acceleration and self-heating, but it may be able to do it. I don't know.
  9. It looks like the guidance lines were removed from the backup camera in 2013 and later models. The reason being patent royalty costs.
  10. Is this an EV? Will it leave you stranded in the middle of nowhere if it runs out of juice? How safe is it? These are the sorts of questions we'll answer. Check out Chevrolet's Extended Range Electric Vehicle, achieving awards in both innovation and safety, and leading America another step away from its dependence on petroleum.
  11. GM has designed an excellent battery that shows no degradation even after years of daily use.
  12. It doesn't need a CVT because the electric motor just changes speed continually.
  13. DC-to-AC conversion is not that lossy. 99.5% efficiency is typical and that 0.5% loss is made-up by the greater propulsion efficiency of an AC motor
  14. Higher voltage is much more efficient, requiring smaller cables and producing less heat. It is also easier on the batteries to deliver high voltage at low amps than the other way around. Using AC allows the use of brushless motors which are more reliable and powerful. It also allows easier control of timing on the electric motor.
  15. This animation depicts the function of the Chevrolet Volt's Electric Drive in detail for General Motors. VO courtesy of General Motors. Â
  16. See how the Chevrolet Volt is made at GM's Detroit-Hamtramck plant. Â Â

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