Design Of Common Rail Injector Used To Meet The Non-Road Mobile Machinery's Emission Standard (China ?, ?)

At the beginning of the 21 st century,with the development of economy,especially the development of Internet economy,the logistics industry has been growing rapidly,and the car ownership has increased substantially.The emission of automobile pollutants has caused great pressure on the environment.The state has made great efforts to control pollutant emission,which has promoted the leap-forward development of pollutant emission limitation in road locomotive system.The emission limitation of non-road locomotive is slightly lagged behind that of road locomotive system.With the rapid development of agricultural mechanization,a large number of construction machinery are used in infrastructure construction,which promotes the treatment of pollutant emission from off-road locomotive system to be put on the agenda.Combining with my own work,I focused on the research and development of the structure and characteristic parameters of injector in the research and development of non-road high-pressure common rail system.The achievements are as follows:A high-speed electromagnet module is designed by electromagnetic simulation.Under the condition that the response of the electromagnet is less than 300 micros,the problem of magnetic leakage and cooling of the electromagnet is well solved,and the national invention patent is obtained.At the same time,the electromagnet response tooling designed in the development process can be applied to the rapid detection of electromagnet in the production process of injector,which improves the working efficiency and achieves good economic benefits.The key parameters of the hydraulic conversion mechanism are determined by using AmeSim tool to carry out system simulation analysis and test data.On the premise of meeting the performance requirements of the injector,the range of the key parameters is defined,which improves the processing ability of the hydraulic conversion mechanism and the production efficiency.Through finite element analysis and optimization,the structure of the injector is more compact and the material selection of parts is more reasonable,thus reducing the production cost of the injector.Using scientific test methods(such as orthogonal design),through the optimization of test design and test flow,the contribution rate of each characteristic parameter of injector to the performance of injector is quickly and accurately summarized.This makes it possible to rationally optimize the allocation of resources in the production process of injector,and focus on the key factors with high contribution rate,which reduces the input of production equipment and is conducive to engineering application.The developed common rail injector has been put into operation successfully and has entered the market.The new electronic controlled common rail injector has helped many engine factories to upgrade their engine emissions,making their engines meet the requirements of the third and fourth stages of off-road emission.Through this design,a common rail injector has been successfully developed to meet the requirements of the third and fourth stages of non-road regulations.It has accumulated experience for the independent research and development of injectors with higher pressure,and explored a set of rapid technology development process in line with its own.At present,the injector has been successfully used in forklift,tractor and other non-road machinery.The project development work has been successful.