Causes of automobile spontaneous combustion

Question 1: What is the main cause of vehicle spontaneous combustion? Generally, auto-ignition of vehicles is caused by the following reasons:

First, the hidden dangers of inferior modification

In the spontaneous combustion accident caused by line fault, the main reason is "grounding". This phenomenon is mainly due to line aging, overload, short circuit, poor contact or wear "grounding", which will produce very large heat. If the wire quality is not good enough, or there are many inflammable and explosive materials around, it is easy to cause fire and spontaneous combustion accidents. For example, the skin between cable, frame and clip is broken due to vibration and friction; Taillight, brake light wire, etc. Damage due to vibration and friction; When the insulator at the lamp holder installation is loose or damaged due to vibration and connector damage, it will automatically "ground" for a long time when the vehicle is driving or stopping, resulting in high temperature, which will damage the insulation of electrical appliances, switches and wires, further expand the flashover range and expand the high-temperature area, and finally lead to spontaneous combustion fire due to contact with paint, leaked gasoline, flammable materials, etc.

2. Short circuit of wires and appliances

The most common electrical short circuit of wire is that the starter switch is welded due to contact sintering, and the starter magnetic switch cannot be released, which leads to the starter starting time being too long (the safe starting time of the starter is 5s), which leads to the starter heating and fire. In addition, in some single-track vehicles, the insulation of the live wire is damaged "grounding" or the electrical equipment is "grounding", which will cause short circuit, especially in some vehicles that have been used for a long time, and the lines are worn and disordered. The "protector" of the wires in the car is the fuse. Once the wire is short-circuited, a large current will be generated instantly, and the fuse will blow quickly. However, if the fuse is too big, for example, someone tries to replace the standard fuse with copper wire, resulting in the loss of protection function, which may lead to short circuit of the wire and fire.

3. Improper parking position

Because the cars produced at present are generally equipped with three-way catalytic reactors, and the temperature of this device located on the exhaust pipe is very high, generally between 300℃ and 400℃. Once there is combustible under the car at this time, it is easy to be ignited by the three-way catalytic device, which leads to the car's fire and spontaneous combustion.

4. Put dangerous goods in the car

In fact, dangerous goods are not only large tankers, but also lighters, perfumes, mousse and so on in our daily life. If we put these items in the parts of the car that are easily focused by the sun's rays, there is also a certain fire hazard. Therefore, when locking the car, check the inside of the car, don't put these dangerous goods around, and don't put dangerous oil products such as gasoline and diesel.

Verb (abbreviation for verb) leaks electricity.

When the engine is working, the ignition coil temperature is very high, which leads to the softening, aging and cracking of the insulation layer of the high voltage ignition wire. Ignition high-voltage electricity is easy to break through the insulation layer, and it is easy to produce high-voltage electricity leakage, which will lead to the rising temperature of the leakage place, ignite the leaked gasoline such as engine and carburetor, and lead to ignition and combustion.

In addition to the above reasons, in fact, oil leakage, long-distance driving in hot weather, excessive contact resistance,

Mechanical friction, automobile carburetor backfire and other reasons can also lead to vehicle spontaneous combustion.

Question 2: What causes the car to spontaneously ignite? How to prevent it? Causes of spontaneous combustion:

Hot weather is not the cause of spontaneous combustion. In fact, spontaneous combustion is not terrible. As long as you know the reason and pay attention to maintenance at ordinary times, spontaneous combustion can be completely eliminated.

Reason 1 of spontaneous combustion: there is something wrong with the oil circuit, which leads to oil leakage and liquid leakage.

Cause 2 of spontaneous combustion: aging or improper connection of wires causes short circuit or sparks.

The third cause of spontaneous combustion: combustible burning caused by high temperature.

Cause 4 of spontaneous combustion: fire caused by vehicle collision or mechanical failure.

Prevention of spontaneous combustion

Now that we know the cause of spontaneous combustion, it is not difficult to prevent it. As long as you do the following measures, spontaneous combustion will be far away from you.

1. In summer, the oil circuit should be routinely tested 1 ~ 2 times. If there is oil leakage, it must be repaired in time. The two ends of the hose in the oil circuit are most prone to aging and cracking. If it is used for too long, it should be replaced in time according to the advice of the maintenance service station.

2. Make changes to the circuit carefully and try to avoid changes. If you change the circuit, you must go to a regular automobile maintenance service station. The changed circuit is safe under the operation of professionals.

3. After parking, check the car chassis to ensure that there are no flammable materials under the car. Do not put flammable items, such as gas lighters, air fresheners, perfumes, mousses, etc. In the parts of the car that are easily exposed to sunlight, such as the dashboard; Don't put dangerous oil products such as gasoline and diesel in the car.

4. When driving, it should also be noted that when the engine is running, do not pour gasoline into the carburetor; When repairing the gasoline filter, do not burn the oil filter with gasoline; Hanging fire method is not commonly used; Avoid dripping in the oil system; Avoid turning on the ignition switch for a long time after the car stops.

Don't throw unlit cigarette butts in the car. It's best not to smoke in the car to avoid hurting yourself.

6. In summer, the car runs at high temperature for a long time, so you should have more rest in the middle and don't expose the car to the sun for a long time.

7. Equip the car with fire extinguishers according to regulations, and remember to replace them regularly. Fire extinguishers should not be dispensable, but should be familiar with the use of fire extinguishers to avoid being helpless in the event of an accident.

8. interior materials had better choose cars with good fire resistance. Once a fire breaks out, it is not easy to spread.

Experts give preventive advice:

Don't modify the car easily, check the circuit and oil circuit regularly, go to a regular repair shop for normal maintenance and repair, and don't put lighters: gas lighters, fresheners, mosquito killers, etc. on the dashboard. It is easy to explode and cause fire after being heated and expanded, and it is equipped with a fire extinguisher.

B emergency treatment method of spontaneous combustion

Sometimes it's hard to prevent. In case of spontaneous combustion, don't be too nervous. Learn some emergency treatment methods to minimize your own losses.

1. Spontaneous combustion generally has early precursors, such as abnormal sound and odor in the car body. Stop immediately at this time. It's best to park your car in a sheltered place.

2. Find the fire point and be careful not to open the front cover at will. Because air enters the car, it is easy to support combustion, so take the fire extinguisher in your hand and turn it on.

3. After the fire, if there is no fire extinguisher in the car or the fire is too strong to save yourself, you should quickly run out of the car, stand behind the car, send a signal to the car behind you, and call 1 19 to wait for rescue.

4. Keep a small paper cutter at hand. In the event of a car accident or fire, seat belts may become a "killer belt" and become a major obstacle to escape. A knife can save the day.

5. Don't go back to the car to get things after a fire or a lot of smoke, because there are a lot of toxic gases in the smoke, and inhalation may also endanger people's lives.

Spontaneous combustion is not terrible. As long as the locomotive is properly maintained and used and the circuit is not modified at will, spontaneous combustion can be completely avoided. Do you think that spontaneous combustion of cars is less than one tenth of the total number of vehicles?

Some cars look beautiful. Open the cover, it's full of dust. Don't forget that dust can also cause short circuits. ...& gt& gt

Question 3: Why does the new car spontaneously ignite? There are five main reasons for the analysis. Mr. Lan, who is in charge of car maintenance in a store in Hangzhou, said that the definition of spontaneous combustion is that there is no external fire source, no collision or overturning, and the car fire is caused by system failure or its own reasons. Generally speaking, old cars are prone to spontaneous combustion, especially those that don't pay attention to car maintenance. Line aging is not easy to detect. If you drive too many miles and too fast, it will cause spontaneous combustion. So, why does the new car spontaneously ignite? Teacher Lan's analysis mainly includes the following situations: First, when the oil leakage temperature is high, the connecting tubing of the gasoline filter is deformed by heat, which makes the tightly connected hose loose when the temperature is low, resulting in gasoline leakage. When the mixed gas reaches a certain concentration, an open flame will appear. Second, when the leakage engine is working, the ignition coil temperature is very high, which makes the insulation layer of the high-voltage ignition wire soften, age or crack, which is easy to produce leakage. "In this case, it may be that the coil is actually burning before the car is turned off, but the smoke has not yet started." Third, short circuit Many new car owners will generally install anti-theft devices, change high-end stereos, transform models, and install air conditioners. Because the wiring and plug connection are not professional during installation, the circuit is easy to short-circuit during use, which leads to spontaneous combustion. Fourthly, the automobile carburetor backfires. When the vehicle is running or starting, sometimes the carburetor backfires. V. Production Defects In the process of production and assembly, a car manufacturer's lax control of a certain part of the car may cause defects in the car itself and also lead to spontaneous combustion of the car.

Question 4: What is the cause of auto-ignition? Reason one: the circuit is aging. After a period of use, the wires of the car will age, the external insulation layer will fall off, and the short-circuit performance will be caused by circuit failure or poor wire contact, which will lead to spontaneous combustion.

Preventive measures: check the circuit regularly, and repair the rubber aging and heating phenomenon of the wires in time.

Reason 2: The circuit modification is incorrect. After buying a new car, some car owners often install some things themselves, such as burglar alarms and stereos. Some shop workers are unprofessional, do not analyze the line structure, do not consider the power of the line, casually lead wires, do not add insurance, do not fix wires and so on. These wrong operations will cause danger.

Precautions: Change the circuit as little as possible. If you want to install it, you must go to a shop with serious and responsible work and skilled technology.

Reason 3: If it is not cleaned for a long time, the oil sludge in the engine compartment will hinder the heat dissipation, leading to excessive temperature or heating of the battery terminal contact points due to impurities and oil stains, thus causing combustion.

Precautionary measures: Check frequently and clean the engine compartment or terminal in time if it is found to be dirty.

Reason 4: Oil leakage. Because the oil circuit is mostly made of rubber, rubber will crack when it ages, resulting in gasoline leakage.

Preventive measures: check the oil circuit regularly, and replace it in time when problems are found, so as to keep the whole engine system clean and tidy.

Reason 5: Fire caused by static electricity. Statistics show that the proportion of accidents when women refuel is higher than that of men. Because there is a relatively high proportion of women waiting in the driver's seat when refueling, the driver returns to the seat and rubs the charged seat, which may cause a fire when discharging. At the same time, due to some clothes, seat covers and other reasons, if the static electricity on the car accumulates to a certain extent, a fire will also occur.

Precautions: Pay attention to discharge at ordinary times, such as buying discharge rods, choosing seat covers or wearing pure cotton clothes.

In addition to the vehicle itself, there are some external reasons that cause the vehicle to burn.

Reason 1: Smoking causes burns. It doesn't mean to light the car directly when smoking, but to put the cigarette butt directly in the ashtray after smoking, or put the lighter on the dashboard, which will explode after exposure and cause combustion.

Preventive measures: smoking as little as possible in the car can not only reduce hidden dangers, but also be beneficial to our health. Pay attention to the handling of lighters and cigarette butts after smoking. It should also be noted that canned items such as air fresheners or pesticides may also cause explosions.

Reason 2: improper parking leads to combustion. When parking in summer and autumn, be sure to pay attention to whether there are flammable materials under the car, such as hay and dead branches. After the vehicle runs for a long time, the temperature of the three-way catalytic converter rises, exceeding 300 ~ 400 degrees Celsius. If there are flammable materials under the car, it may cause the car to catch fire.

Precautionary measures: check when parking to ensure that there are no flammable materials under the car.

Although the fire is ruthless, it doesn't mean that it will burn when it burns. What are the signs before the vehicle spontaneously ignites?

First, there will be a smell, usually the smell of burning rubber, and then there will be black smoke in some places. If this happens, you should pay attention. Be sure to confirm whether the smell and smoke come from the vehicle itself.

Abnormal engine noise is also a precursor to the accident, which may indicate that there is something wrong with the engine, wiring harness or fuel injection mechanism.

Vehicle electrical function failure indicates that electrical equipment or wiring harness is abnormal, so it is best to check it in time.

What should I do under these circumstances?

After discovering the abnormal situation of the vehicle, you must stop and turn off the power supply as soon as possible, check where the problem lies and eliminate the hidden dangers as soon as possible.

If the vehicle does spontaneously ignite, it must be handled calmly. In some cases, it can still be put out in the early stage of the fire. First, pull over immediately. If it is best to park your car in a sheltered place, turn off the fire, turn off the power supply and take out the fire extinguisher. If you find smoke in the engine compartment, don't open the engine compartment cover immediately, because if you do, the fire will expand rapidly because of the large amount of air entering. When you get it, turn on the fire extinguisher and call the police at the first time. Do this only when the fire is very small, otherwise leave the vehicle as soon as possible and call 1 19 to call the police.

After the vehicle burns, the safety of personnel should be ensured first, and in order to protect property, unnecessary casualties should not be caused.

What should I do after spontaneous combustion? If your car has self-ignition insurance. After the vehicle spontaneously ignites, in addition to calling 1 19, you should also call the insurance company to report the case, so as to claim compensation from the insurance company in the future. The claim settlement procedure is basically the same as vehicle collision. What you need to do is to provide the fire identification certificate of the public security fire department. If there is only car damage insurance but no self-ignition insurance, the insurance company will not compensate, because car damage insurance only compensates for combustion caused by external reasons ... >>

Question 5: What is the main cause of spontaneous combustion? Normally, spontaneous combustion is caused by the following reasons: 1. The hidden danger of inferior modification.

2. Short circuit of wires and appliances

3. Improper parking position

4. Put dangerous goods in the car

Verb (abbreviation for verb) leaks electricity.

Question 6: Cause analysis and preventive measures of automobile spontaneous combustion generally include:

1, automobile fuel system leaks.

The fire caused by fuel system leakage is a typical type of spontaneous combustion accident. If transmission oil and steering oil leak into the high-temperature exhaust pipe, it will also cause fire, so this cannot be ignored.

2. Flammable articles are placed in the car.

In addition to spontaneous combustion accidents caused by fuel system and line faults, there are also some links that need attention. For example, at present, many cars in interior materials generally do not have fire protection performance, and once a fire breaks out, it is easy to spread. But many drivers are used to putting disposable lighters on the dashboard, which may lead to the danger of explosion. Some passengers may accidentally leave some flammable items in the car, so there is also the possibility of a small-scale fire.

3. Modify the vehicle line at will.

Without any warning, the car suddenly spontaneously ignited, mostly caused by line failure. In the spontaneous combustion accidents caused by line faults, most of them are caused by arbitrarily changing the line. Many new car buyers like their new cars. It may add anti-theft devices to vehicles, replace them with high-end stereos, improve their appearance, and may also add air conditioners and so on. There is no professional related unit to complete these tasks, which has laid a hidden danger for the occurrence of spontaneous combustion accidents.

The reason is self-evident. If the technical level of relevant technicians is limited, they will never analyze the line layout and specific structure of vehicles, let alone consider calculating the power of different lines, so as to determine where to obtain power more reasonably. Because of this, there are many kinds of wrong maintenance, such as disorderly wiring, unsafe places with heavy loads, and unstable fixed places with easy friction. Once the line is aged, overloaded or worn, the faulty line will generate a lot of heat energy, and coupled with the poor quality of the wire or flammable materials around it, spontaneous combustion accidents will be inevitable.

Therefore, when installing a modified vehicle, you must go to a professional place with a certain scale and good reputation, and you can't leave an opportunity for future fires because of greed or other reasons.

4. Choose the wrong parking place

In addition, when some cars start again after a long period of parking, the vehicles will spontaneously ignite. After inspection, it was confirmed that the cause of the accident was a short circuit caused by partial damage to the line, and the murderer was actually a mouse. This kind of thing may sound funny, but it also warns users. When parking, you should also consider the parking place a little. Never park your car near flammable materials.

5. Lack of proper maintenance

Auto spontaneous combustion is mostly caused by human factors, and more often, users don't go to regular repair shops for normal maintenance and repair. In the process of daily car use, we should strictly follow the requirements in the vehicle manual. Users should pay more attention to inspection at ordinary times to prevent problems before they happen.

Some details should also be paid attention to. Generally, smoke will be generated when the vehicle is driving, but it is invisible in front of the vehicle. This requires you to stop immediately after you smell the smell or see the smoke through the window and rearview mirror. If you need to start work, be careful not to get burned. Once out of danger, experts suggest not to panic, should flee the scene as soon as possible, and call the police in time.

Although the occurrence of automobile spontaneous combustion is unpredictable, it is completely avoidable. As long as users can stick to the regular repair shop for normal maintenance of vehicles, develop good driving habits and take some positive measures to leave no living space for fire hazards, people will not be afraid of the threat of spontaneous combustion.

Question 7: What is the cause of auto-ignition? The external factors leading to spontaneous combustion are mainly high temperature and severe impact. Under normal circumstances, car owners should not put flammable and explosive articles such as lighters and perfumes above the dashboard or in the storage compartment of the center console. Especially in midsummer, the temperature in the carriage can reach 50℃~60℃, and lighters and perfumes are easy to detonate under sunlight, leading to spontaneous combustion. In addition, when parking in summer, be careful not to stop on the ground with weeds and waste paper piles. The hot exhaust pipe may ignite weeds or waste paper, causing the car to spontaneously ignite.

The reasons for the spontaneous combustion of the car itself are: improper vehicle maintenance and unauthorized wiring, which easily lead to spontaneous combustion. If the gasoline pipe is not tightly packed or aged and not replaced, it will easily cause spontaneous combustion when it leaks. Generally, it appears in cars with long age and poor condition. Arbitrary modification may also cause spontaneous combustion. For example, car owners refit stereos, install anti-theft devices, anti-theft locks, and install alarms, all of which are commonplace. It may be that the refitting personnel are not familiar with the line conditions, which leads to the short circuit of the vehicle line or the excessive power of the fuse, laying a hidden danger for spontaneous combustion. This means that the new car may also bury the hidden danger of spontaneous combustion.

Question 8: Why do cars spontaneously ignite? What is the cause of frequent spontaneous combustion accidents caused by continuous high temperature? Recently, there have been several auto-ignition accidents in Dalian, and buses, trucks and taxis have frequently become the protagonists of auto-ignition accidents. Professionals say that circuit fires are mostly the main cause of spontaneous combustion accidents. In order to avoid auto-ignition accidents, drivers are advised to pay more attention to the maintenance of vehicles on weekdays to ensure the effectiveness of fire extinguishers on board. If the vehicle spontaneously ignites, it will be hot for several days, leading to frequent spontaneous combustion accidents. Recently, there have been several auto-ignition accidents in Dalian, and buses, trucks and taxis have frequently become the protagonists of auto-ignition accidents. Professionals say that circuit fires are mostly the main cause of spontaneous combustion accidents. In order to avoid auto-ignition accidents, drivers are advised to pay more attention to the maintenance of vehicles on weekdays to ensure the effectiveness of fire extinguishers on board. In case of vehicle spontaneous combustion, turn off the engine and power supply in time, and do your best to rescue and call the police. 1 Old vehicles are prone to spontaneous combustion accidents. According to reports, old vehicles are most prone to spontaneous combustion accidents. Buses, trucks and taxis are easy to become the protagonists of spontaneous combustion accidents. Master Zhu, the old driver, said that hot weather is only one of the reasons for the spontaneous combustion of vehicles. The long running time of vehicles, lack of regular maintenance, and the oil circuit are prone to problems, which are the main causes of spontaneous combustion accidents. Taking freight vehicles as an example, they run for a long time during the day and are often overloaded, and tires and vehicle chassis are prone to problems. Oil leakage from the chassis of large trucks is very common. When encountering the external cause of high temperature weather, spontaneous combustion accidents are prone to occur. 3883 1 Relatively speaking, the probability of spontaneous combustion accidents in private cars is not very high. On the one hand, private car owners maintain their vehicles in time, on the other hand, private cars rarely drive on the road for a long time, so spontaneous combustion accidents are rare. 2 circuit fires are mostly caused by spontaneous combustion accidents. Zhang Zhiwei, a technician of an auto repair shop in Dalian, said that the common faults of automobile circuits mainly include: open circuit, short circuit and electrical equipment damage. In spontaneous combustion accidents, automobile circuit fires account for a large proportion of spontaneous combustion events. Among them, the aging of circuit lines and the high load of automobile circuits are the reasons. In addition, the installation of electrical appliances and the modification of lines are also important reasons for short circuit and spontaneous combustion. First, because the ignition coil temperature is very high when the engine is working, it is easy to soften, age and crack the insulation layer of the high-voltage ignition wire, and the ignition high-voltage electricity is easy to break through the insulation layer, resulting in high-voltage electricity leakage, short circuit and spontaneous combustion; Secondly, there are more and more electronic control technologies in modern automobiles, and the application of automobile intelligence greatly increases the corresponding power consumption of automobile electronics. The load space of the circuit system on the automobile is limited, and the microcomputer, electronic components and various sensor circuit systems of the automobile are easy to be damaged. Because a large number of additional electronic devices are added to the car, it may also increase the burden of the car circuit, which may lead to spontaneous combustion fire. 3 it is not advisable to open the chassis rashly when the vehicle spontaneously ignites, and smell burning in the car. It may be that the vehicle spontaneously ignited. What should I do? Master Zhu reminded us to turn off the fire and power first. Then try to feel whether the cover is hot or not. If it's hot and you don't have fire control facilities at hand, don't open the box cover rashly, because the fire may not start when you smell burning at first. If the box cover is opened and there is no fire extinguisher at hand, the fire will expand rapidly, which is not conducive to rescue. In this case, it is recommended that the owner call the police quickly. Many drivers think that they have a fire extinguisher in their car, which can be put out when the car catches fire, but it is not. Professionals say that fire extinguishers can only be used to put out primary fires. If you want to remember the effect, you must seize the opportunity. When you find the smell and smoke in the car, you should immediately put out the fire with a fire extinguisher, otherwise you will save it after seeing an open flame. Even if you use a large-sized fire extinguisher, it will become a "drop in the bucket." Fire fighting depends on the timing, not the size of the fire extinguisher itself. When the weather is hot, the probability of vehicle spontaneous combustion doubles. The Traffic Management Bureau of the Ministry of Public Security reminds drivers: 1. Check the car regularly and maintain it diligently to prevent spontaneous combustion caused by oil circuit failure, oil leakage and air leakage. 2. Do not put lighters, perfumes, air fresheners, mosquito killers, mousse and other items in the car. This kind of goods can easily cause explosion and fire when heated and expanded. 3. Try to choose a cool place when parking to avoid sun exposure.

Question 9: Why do cars spontaneously ignite? Which lines are aging? Keywords harsh environment, man-made destruction, random modification, accident,