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本帖最后由 paulwood 于 2023-4-2 22:40 编辑
祖传老军医 发表于 2023-3-31 22:08 
电车护法首先会告诉你，油车也会烧，其次会告诉你，你看人不是逃出来了吗，如果像林志颖一样人受伤了，他会 ...
电动汽车实际上着火可能性最低。每 10 万辆电动汽车，就有 25.1 辆起火。对于相同数量的内燃机汽车，有 1,529.9 起火。
混合动力汽车无疑是最常起火的汽车（既有高压电池，又有燃油）。售出的 100,000 辆混合动力汽车中有 3,474.5 辆起火。这是使用内燃机的汽车数量的两倍多。
A major insurance company in the United States recently conducted a study. Electric cars, according to the study, are in fact the least likely to catch fire. 25.1 out of every 100,000 electric vehicles sold caught fire. For the same number of combustion engine cars, 1,529.9 caught fire.
However, hybrid cars are certainly the ones that catch fire the most often. 3,474.5 out of 100,000 hybrid cars sold caught fire. This is more than double the number of cars using internal combustion engines.
https://belux.edmo.eu/fact-check ... ustion-engine-cars/
着火的起因就能看出来，有些起火的部件电动车上没有。
1) Fuel system leaks
A leak in your car's fuel system is the most common cause of a fire, after all, petrol will ignite from a spark at just 7.2 degrees celsius, while at 257 degrees it will ignite by itself. This combustion process happens all the time inside the cylinders of your car, but when it happens outside, you have a problem, so a leak anywhere in the fuel system (that essentially runs the length of the car) can be catastrophic.
Aged and perished fuel lines or any broken parts should be picked up by regular maintenance, while if you ever smell petrol in or around your car, get it checked immediately.
But it is not just fuel lines - engine oil, brake fluid, transmission fluid and power steering fluid are also flammable to one degree or another, so anything that contains fluid should be regularly checked.
2) Electrical system faults
Petrol bursts into flames easily with a spark, and electricity is always eager to supply that spark, so it is no surprise that electrical faults are another very common cause of car fires.
But it is not just sparks igniting petrol that can cause a fire risk - battery charging cycles can also cause explosive hydrogen to build up under the car's bonnet, yet another fire risk. This is admittedly rare, but it can happen.
Again, keeping your car in top condition with regular maintenance is your best defence here, and if you notice any loose or frayed wires, getting them checked is immediately is always recommended.
Hybrid and electric vehicles throw yet another wrinkle into the combustible equation, with modern high-capacity battery packs required to power an EV burning fiercely (and repeatedly) if punctured and ignited.
Early in 2012 a number of Chevrolet Volts (briefly sold here as a Holden) caught fire during crash testing, with GM determining that leaking coolant interacting with damaged batteries caused the blazes.
Tesla is investigating the recent Model S fire in China, but has yet to determine a cause.
3) Overheating engines
Because they essentially run via a system of controlled explosions, engines get hot, which is why cars have cooling systems to stop them from getting catastrophically hot.
But, again, cooling systems can and do fail. Yet again, regular maintenance and checks are your best friend here, but things can spontaneously go wrong.
Never ignore a warning light on the dash and if your car has a temperature gauge, always pull over and stop if it suddenly goes up.
EVs aren't immune from cooling woes either, as they have even more complex cooling systems to keep battery temperatures under control, but again, regular maintenance and paying attention to any warnings from the car are essential.
Keeping your car (or truck) in top shape is your best defense against unexpected fires.
SUPPLIED
Keeping your car (or truck) in top shape is your best defense against unexpected fires.
4) Overheating catalytic converters
One of the hottest parts of your car - the exhaust system - runs the entire length of the vehicle and one of the hottest parts of that is the catalytic converter, an easily overlooked source of potential fiery trouble.
Simply put, catalytic converters convert harmful pollutants into less harmful emissions, but require high temperatures to work properly.
A catalytic converter can overheat if it is working too hard to burn off more exhaust pollutants than it was designed to process. In other words, if the car's engine isn't operating efficiently and it doesn't burn the fuel properly, then a lot of extra stuff ends up in the exhaust system.
The catalytic converter then has to work extra hard to do its job, which makes it even hotter than usual. A catalytic converter usually operates between 650 to 870 degrees Celsius, but an overworked one can easily get up to more than 1,000 degrees.
Again, regular maintenance and paying attention to warning lights or chimes is essential to prevent this.
5) Design flaws
Cars are incredibly complex machines, so it is inevitable that sometimes unexpected design flaws sneak through, despite the billions of dollars car companies sink into developing them.
Sometimes a design flaw can be rectified by a simple software update (either at a dealership or, increasingly commonly, over the air via wi-fi) or it may require a recall to fit improved parts.
A design flaw rarely ever cases a fire by itself, however, more commonly they simply make a fire more likely if a failure should occur. |
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发表于 2023-3-31 06:38:09
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