Determine 3 groups of causes of vehicle fire

Users of vehicles are not properly used, the structure of electric short-circuiting and fuel systems is 3 main reasons causing a series of fire and explosion phenomenon over the past time.

Ministry of Science and Technology yesterday collaborated with a number of ministries to organize scientific conferences, report the results of determining the causes and solutions of fire and explosion prevention and fighting.

The project is chaired by Vietnam Register Department in coordination with the key Laboratory of Oil Refining and Petrochemical Technology - Ministry of Industry and Trade, Institute of Motive Engineering - Hanoi University of Science and Technology, Research and Design Center Experimental repair - University of Transport and Implementation from June 2012 to November 2012.

After nearly 6 months, the research team conducted a thorough investigation and analysis from motorcycle and fuel structure to vehicle users to determine the cause of fire and explosion for cars and motorcycles.

However, managers and scientists still have not found the main cause of vehicle fires, but they offer three groups of causes, including poor quality fuel, electrical systems and a sense of vehicle users.

Mr. Nguyen Van Phuong, Vietnam Register Department said that the user consciousness
Used in vehicle maintenance, vehicle inspection is not always one
causes of vehicle explosion in recent years. (Photo: Huong Thu)

Quality of fuel and additives

Affirming that the main fuel standard is not the cause of fire and explosion of motorbikes, but Dr. Vu Thi Thu Ha, Laboratory of key refining and petrochemical technology points out that fuel is mixed with The purpose of commercial fraud by abusing additives RON - octane in gasoline such as gasoline phase A83, naphtha condensat to cheat into A92, A95 can cause a lot of impact on the engine.

The group of Dr. Ha researched on 40 samples from the circulation models on the market, the model of fire engines and gas stations that the vehicle owners bought and samples sent by customers. Through analysis, the team found many samples including indirect indicators related to RON such as oxygen, iron, manganese, benzene with many times higher than the permitted standard.

According to Dr. Ha, the use of some additive RON additives in blending fuel leads to additives that exceed standards, or have other ingredients with common additives that are easy to make metamorphic fuel. From there, expand or destroy details with polymer materials; creating non-beneficial intermediates such as polymer films jamming gasoline pumps, nozzles; Metal oxides damage spark plugs, catalytic converters, and form FeS compounds that ignite themselves.

Dr. Ha warns, most of the fuel-saving solutions and tablets are not as effective as the advertising."People who use solutions or pellets economically, which contain arbitrary iron or manganese compounds, can increase the amount of fuel that makes FeS compounds increase the risk of fire ," Ha said.

Power system

For motorbikes, due to variety of vehicles, in order to be convenient in the research process, the research group divided into two types of vehicles with old design and new designed cars. Scientists focused on electrical systems, fuel systems, cooling and cooling systems, which are all sources of fire.

According to Dr. Pham Huu Tuyen, Institute of Dynamic Mechanics, Hanoi University of Science and Technology, electric systems on motorcycles often use chassis as cathode, so when the conductor with positive voltage is open or broken, touching the chassis or entering a cool wire will cause electric shock. When short-circuiting, a high-current current causes a melting and burning of the insulating shell to create a fire source.

In addition, the system leads to leaking fuel that causes the vehicle to explode when it comes to heat (fire or electric spark). Fuel leakage occurs when the pipeline from the fuel tank to the carburetor is opened.

In addition, the cooling system cools when damaged, resulting in too high engine temperature and auxiliary systems, rapid aging or melting, even burning of plastic parts and electrical wires, causing electric shock.

'Surveys at 52 automobile and motorbike repair, maintenance facilities throughout the country also show that many cases of vehicle fire are mainly due to electric shock, of which cars account for 41.72% and motorbikes are 35, 28% , 'Mr. Tuyen cited.

The main reason leading to the explosion of vehicles
Last time has not been determined. (Photo: Nguyen Hung)

Vehicle users are not correct

Within 6 months, the research, survey and investigation team related to vehicle explosion in some assembly, repair and maintenance facilities showed that the cause of vehicle fire could be added by these places. equipment not according to the manufacturer's design, maintenance or improper repair or use of spare parts is not guaranteed to lead to electric shock.

The project also conducts surveys and surveys according to questionnaires and interviews with motor vehicle users. Report of Master Nguyen Van Phuong, Vietnam Register Department shows that only 8% of motorbike users and 30% of car users are interested in reading user manuals, 65% of people using motorcycles Preliminary examination of the status before departure; 80% of car users and nearly 90% of motorbike users are also subjective when entering the area with flammable substances.

Facing the above situation, the project team recommended users to use vehicles with routine care and maintenance of vehicles; do not arbitrarily change the structure of the vehicle; do not arbitrarily use floating fuel or pellets on the market.

'This is just the initial result, we will continue the research process to find out the exact cause of the fire and explosion' , Mr. Trinh Ngoc Giao, chairman of the project said.

In the coming time, the group will focus on researching the effects of fuel additives, assessing the ability to cause fire from parts in the vehicle, assessing the impact of structures and materials on the ability of fire and explosion convenient.

Research results of the thesis are reported to the Government and a scientific basis for proposing and proposing the application of technical solutions and management to prevent fire and explosion effectively for cars and motorcycles.