• Fire Science and Engineering
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• v.31 no.1
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• pp.89-97
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• 2017

This study analyzed the case of diesel car fires that occurred while driving in a tunnel 5 days after maintenance at a car service center. The results of the investigation and analysis found that a large amount of white foreign matter adhered to the inside of the exhaust port and the insulating plate above the DPF (diesel particulate filter) installed in the middle of the exhaust pipe was melted and lost. In particular, the metal floor of the car above the DPF was molten and pierced, and the rubber mat placed on the metal floor was burnt. Moreover, while the exhaust pipe in front of the DPF showed no overheating mark, such a mark was observed in the exhaust pipe from the DPF to the exhaust port. Because these findings may appear only when the DPF is overheated and ignited, this car fire is believed to have been caused by internal overheating of the DPF. The car fire investigation of this study suggests that if white foreign matter is found in the inside of the exhaust port during a fire cause investigation of a diesel car, the cause of the fire should be determined by removing the DPF and examining the internal damage of the DPF.

• Transactions of the Korean Society of Automotive Engineers
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• v.24 no.5
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• pp.556-565
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• 2016

As a result of the enforced control of emission, many devices, including the diesel particulate filter, have been installed in diesel cars to reduce the emission of particulate matters. In this study, a car fire case has been investigated and analyzed. A car fire broke out after the vehicle traveled a distance of 1.4 km from a car service center. The car was provided with DPF cleaning when the DPF warning light came on. After being dismantled in the engine room, the car's engine and gearbox were investigated. The findings showed that the rear part of the DPF metal case was melted and punctured, while the honeycomb filter of the DPF was damaged. The car fire was caused by an overheated DPF associated with inaccurate maintenance practice. Therefore, the responsibility of the fire rested on the car service center that performed the DPF cleaning.

• Fire Science and Engineering
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• v.32 no.1
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• pp.99-107
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• 2018

Diesel cars employ a diesel particulate filter (DPF) to reduce the discharge of fine dust. However, cases of fires caused by DPFs have been reported in diesel cars. In this study, I examined the regulation of exhaust gas and exhaust gas recirculation in diesel cars. Then, I analyzed cases of car fires caused by DPFs, their characteristics, car fire factors related to DPFs and preventive measures, and their consideration in investigations of the causes of fires. Finally, regarding car fire investigations, this study proposed a process of proving that fires are caused by DPFs.

• Fire Science and Engineering
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• v.26 no.4
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• pp.70-76
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• 2012

This paper deal with vehicle fire caused by damage of diesel particulate filter (DPF) on diesel passenger vehicles. In order to reduce particulate matters included exhaust gases, a DPF in the exhaust system were installed diesel vehicles. A DPF was broken by excessively trapped particulate matters, regeneration error with a malfunction of ECU and defect of suction system such as swirl valve. If the DPF was broken, hot exhaust gases was released to the bottom of vehicle and released hot exhaust gases lead to occur the fire through combustible materials around the exhaust system. When a fire happened in the diesel vehicle caused by damage of DPF, silicate inorganic compounds were attached to the exhaust ventilation pipe and muffler. The silicate inorganic compounds were created by DPF combustion consisting of raw material ceramics. If the silicate inorganic compounds attached to the tail pipe in the diesel passenger vehicles, its fire cause will be assumed damage of DPF.

• Journal of the Korean Applied Science and Technology
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• v.11 no.1
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• pp.45-52
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• 1994

For the purpose of producing emulsified fire proofing agent for synthetic fibers, 2,3-dibromopropylmonoamido orthophosphate[DP-AOP] and bis(2,3-dibromopropyl)monoamidoorthophosphate[$(DP)_{2}AOP$] were synthesized, and their structures were identified by instrumental analysis, respectively. Using three kinds of emulsifiers, O/W emulsified fire proofing agents, DPF and DPDPF, were obtained corresponding to DP-AOP and $(DP)_{2}-AOP$, respectively. Various synthetic textiles were fire-retardant treated by prepared DPF and DPDPF, and fire retardancy and tearing strength of the resulting products were tested. The results showed that as the concentration of fire proofing agents increased, fire retardancy increased, but the tearing strength much decreased, where the tendencies of DPDPF were deeper than those of DPF. But, since the fire retardancy appeared favorable in the range of $10{\sim}20wt%$ of DPDPF, DPDPF is proven to be a fire proofing agent useful for various synthetic textiles.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.689-695
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• 2018

This paper presents the means of controlling the regeneration of a diesel particulate filter (DPF) that is mounted on tactical vehicles to satisfy exhaust gas standards. The DPF captures particulate matter in the exhaust gas and combusts the captured particulate matter. This process is regeneration, which is essential to the normal performance of the DPF. Bad regeneration causes degradation of vehicle performance; worse, it can lead to a vehicle fire. DPF regeneration is performed by control logic. If the regeneration control logic does not properly reflect the operating characteristics of the vehicle, DPF regeneration may not occur. Consequently, it is very important to ensure the DPF operates properly by reflecting the operating characteristics of the tactical vehicle. This study analyzes the operational characteristics of a tactical vehicle and the DPF, and adds proper DPF regeneration control logic. Additionally, this study is intended to simultaneously improve the additional problems that may occur from operating under the added regeneration control logic.