What are the causes of the fire on the tourist bus?

1, fuel system leaks. The most common cause of vehicle fire is fuel system leakage. All kinds of oils in automobiles have the characteristics of flammability, toxicity and corrosiveness, among which fuel oil contains these three characteristics. The temperature of gasoline only needs to exceed 7.2℃ to be quickly ignited, and this kind of combustion happens all the time in moving cars.

2. Electronic system failure. The reason why electronic system failure is listed as the second major cause of vehicle fire is because electronic system failure does occupy a certain proportion in many fire accidents. If the car battery fails, the charging process may lead to hydrogen explosion in the engine compartment. In addition, if the wiring harness connecting the battery is loose, the leaked current will react with droplets and leaked steam in the process of transmitting current from the battery, resulting in fire.

3, all kinds of oil overflow. There are various liquids under the hood of every car-fuel, engine oil, transmission oil, steering oil, brake oil, coolant and so on. When the car is running, the oil on it is circulating, and in the circulating system containing these oils, the sealing of any conduit is problematic, resulting in oil leakage, which may lead to fire. Some of these oil circulation systems only cover the engine compartment, while others flow through the whole vehicle, such as brake oil.

Extended data:

The indirect fire caused by engine overheating is a good case of chain reaction. The car engine itself can't overheat enough to catch fire. But it will make the coolant, engine oil and other liquids in the engine compartment exceed the standard working temperature. Once this happens, these liquids will overflow and spray everywhere in the engine compartment. After contact with other high-temperature parts, there is a high probability of fire.