How does spontaneous combustion of a car occur? What causes spontaneous combustion in a car?

The cause of spontaneous combustion of automobiles is the aging of the circuit, the aging of the oil circuit, the lack of oil in the lubricating oil system or improper modification. The following is a detailed description of the causes of spontaneous combustion in automobiles: Circuit aging:

The engine compartment of a car is filled with various electronic components and wires. If the wire sheath is damaged due to aging, resulting in leakage and short circuit, it is easy to cause open flames and cause spontaneous combustion of the vehicle. Oil circuit aging:

Due to insufficient ventilation, high temperature exposure, and heat generated by the work of various components, the temperature of the engine compartment is too high. If an oil leak occurs due to aging damage, it is easy to cause spontaneous combustion of the car. Lack of oil in the lubricating oil system:

If the engine's lubricating oil system is short of oil, the surface of the parts will be heated by rubbing against each other, igniting combustibles through heat conduction or radiation, and eventually causing a fire. However, this is more common in trucks. Improper modification:

Many car owners like to add various components to their cars, such as xenon, fog lights, reversing radar, etc. However, due to the non-standard and unprofessional modification, the wiring is chaotic and the interface is unstable, leaving hidden dangers for the spontaneous combustion of the vehicle.

Usually the spontaneous combustion of vehicles is caused by the following reasons:

1. In the spontaneous combustion accident caused by line failure, the main reason is "tie-up". This phenomenon is mainly due to the problem of line aging, overload, short circuit, poor contact or wear and tear, and the "tie-in" can generate very large heat. If the quality of the wire is not good enough, or there are many flammable and explosive items around, it is easy to cause spontaneous combustion accidents.

For example, the skin is broken due to vibration friction between the cable, the frame and the wire clamp; Tail lights, brake lights, wires, etc. are broken due to vibration and friction; The installation of the lamp holder is loose and damaged due to vibration and damage to the connectors, which will cause the vehicle to "catch the iron" and jump over for a long time when the vehicle is driving or parking, resulting in high temperature, causing insulation damage of electrical appliances, switches and wires, and then increasing the scope of the flashover, expanding the high temperature area, and finally leading to spontaneous combustion and fire in contact with paint, leaked gasoline, flammable materials, etc.;

2. The most common electrical short circuit of wire short circuit is that the starter switch is welded due to contact sintering, and the starter magnetic switch cannot be released, resulting in the starter starting for a long time (the safe start time of the starter is 5s), resulting in the starter heating **. In addition, in some single-wire cars, the insulator of the live wire is damaged and the "tie iron" or the electrical "tie iron" will cause short circuits, especially for some vehicles that have been used for a long time, the lines are dilapidated and the lines are arranged in a chaotic manner. The "protector" of the wires on the car is the fuse, and once the wire is short-circuited and a large current is generated instantaneously, the fuse will be quickly blown out.

However, if the fuse is too large, for example, someone tries to replace the standard fuse with copper wire, resulting in the loss of protection function, it may cause a short circuit in the wire and cause a fire;

3. Because the cars produced now are generally equipped with three-way catalytic reactors, and the temperature of this device located on the exhaust pipe is very high, the general temperature is 300 to 400, so once there are flammable materials at the bottom of the car at this time, it will be easy to be ignited by the three-way catalytic device, which will lead to spontaneous combustion of the vehicle.

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1. Installing electrical appliances and modifying wirings on automobiles, due to the mistakes of installers or brutal construction, resulting in short circuits in wires and leading to disasters.

2. Due to the aging of vehicle electrical components and circuits, users do not pay attention to inspection and maintenance, and it is easy to cause short circuit and fire.

3. The aging of the engine fuel pipeline and the improper replacement of oil pipes and other parts cause fuel leakage. When encountering short circuits in wires and open flames caused by aging electrical appliances, it is easy to ignite gasoline and cause fire.

4. The fire of the car caused by the quality of the new car should be said to be a very rare phenomenon. The level of manufacturing is constantly improving, and this kind of misfire situation is becoming less and less.

Under normal circumstances, car fires and spontaneous combustion are basically caused by:

"Grounding" generates a lot of heat, which affects spontaneous combustion caused by contact with paint, leaking gasoline, flammable materials, etc.

2.Short circuit of wires and electrical appliances: The most common electrical short circuit of wires is that the starter switch is welded due to contact sintering, and the starter switch cannot be released, resulting in the starter heating **;

3.Improper parking position: because most of the cars currently produced are basically equipped with three-way catalytic reactors, and the temperature of this device located on the exhaust pipe is very high, most of the temperatures are basically between 300 -400, so once there are flammable substances under the car at this time, it is easy to be ignited by the three-way catalytic device, affecting the ignition and spontaneous combustion of the car;

4.Place dangerous goods in the car: lighters, perfumes, mousse, etc. In our daily lives, there are also dangerous goods that constitute infiltration car fires. If we place these items in a place where sunlight can easily focus in the car, there will also be a necessary risk of fire.

5.Leakage: When the engine is working, the temperature of the ignition coil is very high, which softens, ages and cracks the insulation layer of the high-voltage ignition wire, and the ignition high-voltage electricity is easy to break through the insulation layer, which is easy to cause high-voltage electric leakage, causing the temperature of the leakage to rise, igniting the leakage gasoline of the engine and carburetor, and affecting the ignition of the ignition.

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With the progress of society, the development of automobiles is changing with each passing day. Nowadays, almost every household has a private car, which brings convenience to travel, but also brings many hidden dangers. For example, spontaneous combustion of cars is frequent in summer.

According to statistics, automobiles account for more than 40% of vehicles in spontaneous combustion accidents, of which 70% are spontaneous combustion while driving.

Causes of spontaneous combustion of cars.

1. Short circuit. There are complex circuits and electronic components around the engine compartment of a car. As the car comes to life, circuits and electronic components can fall off due to long-term high temperatures, resulting in short circuits and leakage currents, which can eventually lead to fires and disasters.

2. Aging of the battery.

Nowadays, there are different quality new energy vehicles in the domestic market, and some pay attention to battery testing in order to reduce costs, which will lead to poor battery quality. In addition, as the service life ages, the battery will eventually get out of control in hot weather environments, resulting in increased heat generation and fires.

3.There are flammable debris in the car.

The car is an almost hermetically sealed environment. In addition, the weather is hot in summer, and the heat in the car cannot be dissipated. At this time, if there are flammable materials in the car, it is easy to cause disasters.

A harbinger of spontaneous combustion of a car.

1.The meter light does not light up. A short circuit in the line will directly cause the meter light to not light up.

2.The engine was smoking. When the engine emits abnormal black smoke and the smell is unpleasant, we need to check it in time, which is likely to lead to spontaneous combustion.

3.Starting the car is difficult, and the journey is bumpy.

How to save yourself from spontaneous combustion of a car?

When we find that the car is smoking, we first need to deal with it calmly, park the car in a safe area, and then turn off the engine and turn off the power.

Subsequently, the occupants of the car were quickly evacuated, and the fire extinguisher carried in the car was subsequently removed.

If the fire is small, extinguish it with a fire extinguisher in time. Otherwise, if the fire is strong, evacuate to a safe area in time and then call 119.

The key to preventing spontaneous combustion of automobiles is to solve the problem in time during daily maintenance.

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