THEORETICAL FOUNDATIONS AND PRACTICE OF DIAGNOSTICS OF ENVIRONMENTALLY-FIRE HAZARDOUS EMERGENCY MODES OF OPERATION OF ROAD TRANSPORT CATALYTIC SYSTEMS

World of transport and technological machines Pub Date : 1900-01-01 DOI:10.33979/2073-7432-2023-2(80)-1-74-80

Lozhkin Vladimir Nikolaevich

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Abstract

A kinetic model of the processes of chain oxidative reactions in automotive catalytic converters and PM2.5 soot particle filters of a honeycomb block design has been developed. Calculations according to the model confirmed the emergency modes of operation of converters, uncontrolled heat growth of more than 261683 kJ/h and, as a consequence, the oxidation temperatures of CO, CH, soot with melting and destruction of catalyst carrier matrices. It is shown that the causes of extreme neutralization modes can be malfunctions of electronic catalytic systems, increased sulfur content in fuel and oil, corrosion of fuel equipment parts, overheating of the engine and turbocharger. It is shown that the emergency heating of the converter is associated with an increase in the risk of car fire. An original method for monitoring the environmental-fire hazardous modes of operation of catalytic converters based on the modernization of the standard diagnostic procedure in accordance with GOST 33997-2016 (TR TS 018/2011) is proposed.

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道路运输催化系统环境火灾危险应急模式诊断的理论基础与实践

建立了汽车催化转化器和蜂窝式PM2.5烟尘颗粒过滤器的链式氧化反应动力学模型。根据该模型的计算证实了转炉的紧急运行模式，即超过261683 kJ/h的不可控热增长，以及CO、CH、煤烟的氧化温度随着催化剂载体矩阵的熔化和破坏而升高。结果表明，极端中和模式的原因可能是电子催化系统故障、燃料和机油中硫含量增加、燃料设备部件腐蚀、发动机和涡轮增压器过热。结果表明，转炉紧急加热与汽车火灾风险的增加有关。根据GOST 33997-2016 (TR TS 018/2011)的标准诊断程序现代化，提出了一种监测催化转化器环境-火灾危险操作模式的原始方法。

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World of transport and technological machines

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