The hottest key technology research of diesel engi

2022-10-23
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China has made major breakthroughs in the research of key technologies of diesel engines in succession

China has made major breakthroughs in the research of key technologies of diesel engines in succession

recent China Construction machinery information

Guide: according to the Ministry of science and technology, recently, China has made major breakthroughs in the research of key technologies of diesel engines in succession. The key technology research project of high-pressure common rail heavy-duty diesel engine supported by the National 863 program has achieved phased results. The project designs and develops a high-pressure common rail pump with an injection pressure of 180 MPa, which meets the requirements of

according to the Ministry of science and technology, recently, China has made major breakthroughs in the research of key technologies of diesel engines

the project "Research on Key Technologies of high pressure common rail heavy-duty diesel engine" supported by the National 863 program has achieved phased results. The subject designs and develops a high-pressure common rail pump with an injection pressure of 180 MPa, and a common rail pipe that meets the requirements. The performance test is carried out on the cold towing test-bed, and the bench test verification is carried out on the engine, which lays a good technical foundation for the development of key components and key technology research of the high-pressure common rail fuel system

at the same time, the subject developed 32-bit MCU hardware and basic software based on multi-core, completed a+ sample bench and three high tests, and achieved good control effect; CDPF (diesel particulate filter with catalytic coating) regeneration catalyst coating has been developed to meet the purification control of THC (total hydrocarbon) and CO (carbon monoxide) in the regeneration stage. Molecular sieve SCR (selective catalytic reduction) suitable for combination with CDPF system has been developed and small batch production has been realized; The research of VNT (variable nozzle turbocharger) supercharging system technology, two-stage supercharging technology and the control and regulation strategy of the turbocharger system for EGR (exhaust gas recirculation) technology are studied, and the installation application is realized

the successful implementation of the project "Research on Key Technologies of diesel engine post-treatment meeting Euro VI emission standards" supported by the 863 plan of the 12th Five Year Plan is a groundbreaking achievement in the research on Key Technologies of diesel engine post-treatment system, which fills the main intellectual property rights of the safety module, electrical module, rotation module, electromechanical coil framework, slide rail and other modules that are generally used in household appliances with self-engineering plastics There are gaps in the integrated technology and products of diesel engine exhaust pollutants after treatment that meet the euro VI emission standard, and good social and economic benefits have been achieved

according to the research plan, based on the full investigation of diesel engine post-treatment technology at home and abroad, and based on the study of DOC (oxidation catalytic converter), SCR (selective catalytic reduction) and soot combustion reaction mechanism, the research and development of DOC, SCR and CDPF (diesel particulate filter with catalytic coating) catalyst coating have been completed, a catalyst scheme meeting the target performance has been formed, and the scale-up production and performance verification of DOC and SCR have been completed. In terms of carrier production, through raw material screening and process optimization, the research and development of 13 inch large carrier and particle trap carrier have been partially completed, breaking the monopoly of imported products

the phased results of the project show that the post-processing system functions with independent intellectual property rights. 6: untrained workers should not be close to the experimental machine when operating. The performance of the experimental machine has partially caught up with or reached the level of foreign similar advanced products, filling the domestic gap and breaking the passive situation of long-term dependence on technology or product imports, And successfully implemented the national "first set" and other policies, combined demonstration application with industrialization, made beneficial exploration for the promotion and application of independent innovative products, practiced the collaborative innovation mode of "production, learning, research and application", and improved China's comprehensive strength in this technology

in addition, the "research and development of energy-saving, environment-friendly and efficient car diesel engine" project supported by the 863 plan of the 12th Five Year Plan has made major breakthroughs. The project adopts technologies such as high-pressure common rail, variable nozzle supercharger, cooled exhaust gas recirculation and active regeneration of particle trap, and greatly improves the power and economy of the diesel engine by optimizing the combustion chamber design, optimizing the engine structural design, reducing the engine friction resistance and other methods; By adopting multiple injection, advanced post-treatment system control and other methods, the emission of pollutants and the vibration and noise of the engine are greatly reduced

the test results show that the engine developed by the project has a power rise of 57.5 kW/L, a torque rise of 175 nm/L, and the engine performance is up to or better than that of similar foreign products, reaching the world's advanced level made by others such as metal lithium and butyl lithium, filling the domestic gap, and making technical preparations for promoting the diesel process of domestic passenger cars and reducing the average fuel consumption of passenger cars. The calculation results show that the fuel consumption of the whole vehicle matching the engine can be 15% lower than the national fuel consumption standard in the third stage, and the emission reaches the national five level, which has made outstanding contributions to the realization of the energy conservation and emission reduction goals of the automotive industry

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