General Car Discussion

Discussion in 'Automotive' started by HadACoolName, Mar 6, 2015.

  1. bussin.buses

    bussin.buses
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    Well, I like 'em all. I don't know if I could pick a favorite.
     
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  2. default0.0player

    default0.0player
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  3. Rainvest

    Rainvest
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    yes my friend this is what obd 2 and google is for.

    inb4 all the “MY GRANBSON GREYSON DUSNT NO HOW TO A TUNE A CARB ON A LAWNMOWER,,,ALEXA CALL GREYSON TO FIX MY WIFI”
     
  4. bussin.buses

    bussin.buses
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  5. bussin.buses

    bussin.buses
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  6. Rainvest

    Rainvest
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    steal the kei trucks and drive them in boat shoes like me (they suck and have no power)
     
  7. bussin.buses

    bussin.buses
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    I'd rather not.

    I don't want kei trucks, anyways. I'd much rather have a '70s full-size truck.
     
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  8. bussin.buses

    bussin.buses
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    Nostalgic much?
    The style of this broadcast just makes me want to go back in time, to the good ol' days.
     
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  9. bussin.buses

    bussin.buses
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  10. GearHead1

    GearHead1
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    upload_2024-1-25_8-55-1.png
    I'm really liking the new Santa Fe. A lot of the new Kia-Hyundai models have way too much styling and won't age well but this is good.
     
  11. SmokeyDokey

    SmokeyDokey
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    As soon as I saw that rear, I could only think 'G-Class' (especially with no rear tire). Similar idea with the low lights + the way the tailgate has that bend in the middle (although it's much closer to straight with the G-Class).
    image_5_20_23_at_12_33_am_483ca358084cb608d48cbbb19d3be8d3fe443c28.jpg
     
  12. GearHead1

    GearHead1
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    The front us so range rover I love it so much, ahhhh upload_2024-1-25_15-51-24.png
    I really wish the Tahoe/Suburban were retro like this
     
  13. SmokeyDokey

    SmokeyDokey
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    All I see is Ford Flex (but improved slightly).
    341913.jpg
     
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  14. GearHead1

    GearHead1
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    Eh yeah I guess it's more that the whole thing gives me Disco vibes
     
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  15. ARES IV

    ARES IV
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    Battery Development 1991 - 2023


    BatteryDevelopment1991-2023.png


    The curve that gives big oil nightmares.
     
  16. combatwombat96

    combatwombat96
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    interesting...

    However it seems that battery fires seem to be ever more present despite what that graph show about quality; Now that maybe could be due there just plain outright being significantly more electrical car out and about, or is it there being more media focus on the phenomenon, or is it despite good battery's being available more and more companys are choosing cheaply made battery's over quality ones...

    What would be your answer to such questions?
     
  17. Koichiro Iketani

    Koichiro Iketani
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    Probably a combination of all three
     
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  18. default0.0player

    default0.0player
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    This is super scary
    I guess the use of tin foil hat(over the car) is no longer a conspiracy theory.
    BAN FORCED UPDATE! BAN CONNECTED CARS!
     
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  19. Mikah 01

    Mikah 01
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    At least autopilot isn't used on heavy duty Vehicles , except the Tesla semi truck , but it isn't released, so no need to fear



    M'y biggest fear is autopilot on a bulldozer , or worse...a killdozer
     
  20. ARES IV

    ARES IV
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    Its complex:

    The fire risk of an combustion engine vehicle comes from the unavoidable need to have highly flammable fuel pretty close to very hot parts like the engine block and the exhaust system. Modern performance and emission control technology only increases the risk, as the quest for ever higher efficiency leads to more thermal load on individual parts and most exhaust cleaning technologies require high operating temperatures. This makes the exhaust system a serious danger for fire should the vehicle be parked above anything flammable. While heat shields exist, they have limits and also tend to degrade with time, so the older a vehicle is, the higher the risk of it starting to burn due to fuel leaks, heat shield damage and exhaust cleaning system issues.

    We had a fire that burned over 30 cars in my region last year. The reason? A vehicle that parked on the same dry grass all week without issues parked on the same dry grass on thursday..... right after the ECU run a diesel particulate regeneration cycle. (Burning the sooth with raised exhaust temperature which is achieved by basically burning diesel fuel in the exhaust system before it). As a result, the exhaust system was much hotter than usual which proved to be enough to ignite the grass, leading to a major fire that destroyed over 30 vehicles.


    The fire risk of an battery electric vehicle meanwhile comes almost exclusively from the battery system as the higher overall efficiency of transforming electric energy into movement leads to much lower waste heat and as such does not tend to have any surfaces hot enough to ignite anything flammable touching the vehicle/being close to it.

    All batteries use chemical processes to store and to output electric energy. The batteries with the highest energy density use materials that oxidize = burn when exposed to air which is of course an significant drawback both overall and especially for a mobile application where the risk of an accident also comes with the risk of damaging the armor arround the battery. This also makes such fires difficult to extinguish as the battery will autoignite even after being fully cooled down the moment air reaches an cell that is not sealed anymore.

    Decades of experience with fuel tanks and an armored shield arround the battery of such EVs tend to reduce that risk to an acceptable level, chances are that an crash severe enough to damage the battery enough to cause a fire is so severe in the first place, that nobody inside the car is still alive by the time the flames spread. Not that anyone want to test that of course, but then the cruel truth is, that heavily crashed ICE vehicles at times also burn, when the fuel tank is ruptured and fuel reaches hot parts.

    The advance in overall energy density however allows to use less energy dense, but much safer battery chemicals while still maintaining a reasonable range. Those chemicals avoid the

    - ignites on air contact

    issue which means that once a burning EV wreck has been cooled down, it wont start burning again on its own. They also tend to have a higher cycle durability which means that they will have a longer lifetime. Most analysts assume that those battery chemicals will be the mainstream battery chemical of choice within 5 years.


    Still and to come back to your question, for at least the foreseeable future difficult to extinguish EV fires are going to be a reality but a reality that most fire departments should be quite capable of handling once they got proper training and equipment. And while some EVs will still require additional effort to contain in a safe state, I dont really see it an big issue.

    Most cars never burn, they end up in a scrapyard after many years of service. And in the grand scheme of things, the added ressource and environmental costs of a burned down EV are going to to still much lower than the fuel that would have been burned by combustion engine vehicles.



    One should maybe not compare a Battery Management System made by the cheapest bidder for an expected lifetime of less than 2 years with an BMS made for a high voltage battery that costs thousand of euros and is supposed to last 20 years ;-)

    One might also assume that the fail save in such an system would avoid unsave or very battery damaging operations in the first place. Cannot properly charge anymore? Deny all charging. The BMS in a car is also a seperate part of the hundreds or even thousands of single battery cells so it can be replaced without touching the battery in principle.

    With EV still being the brand new thing and manufacturers being - rightfully - afraid of being the first one to be known for unreliable battery systems, most batteries and battery systems tend to be overengineered. The harsh cost cutting will come later when they assume they can get away with it.

    I cannot confirm your experience with LEDs... I use LED tubes like that

    LEDTUBE.jpg

    and they operate whenever my computer is running. My computer has in excess of 30000 operating hours and those LEDs, besides being over 7 years old run perfectly fine.

    The thing that kills most LED light bulb is not the LED itself, but the electronics powering it. For classical light bulbs replaced by LED light bulb, the issue - similar to fluorescent energy saving lamps - is that the electronics are above the still heat emitting lamp and as such tend to get fried over time, greatly reducing lifetime.

    If you design them with proper cooling, they casually last decades. While my roof lights (white LED tubes) dont run nearly as much as my coloured ambient light LED tubes, they are still working perfectly fine after 7 years of moving in.



    Quality in that graph is used as the term for energy density first and foremost. To achieve higher energy density two primary factors contribute to ever raising capacity:

    - Better battery chemicals and technology - more capacity for a single cell
    - better packacking = fitting more cells into the same amount of room.


    EVs are still rare enough to make a battery fire an news worthy thing. Nobody bats en eye when a combustion engine vehicles start to burn, something that you can hear every 2 weeks here in the local traffic radio.

    EVs are about to become mainstream and they are also getting cheaper, so I would estimate the peak of battery fires (and premature failures) to be between 2030 and 2040.

    Because by then EV will be so mainstream, that the cost cutters will take over and squeeze out as much quality as they can without the car dying inside the warranty period. Then they will have found the treshold and from then on, quality will be stable/slightly improving with better technology.

    PS: Cost cutters destroyed the pretty reliabe Ford Sigma Engine in the quest for ever more material savings. They removed more and more material from the engine block with every new revision... until it was finally to much and many of those engines died rather prematurely at 30000 - 50000 km..... Ford realized the mistake and quickly went back to produce the revision before it, but many buyer would find little consolation in that, because they were forced to pay most of the damage.


    https://en.wikipedia.org/wiki/Ford_Sigma_engine
     
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