Structural Design and Fuel Injection Characteristic Analysis of High Pressure Common Rail Injector Driven by Giant Magnetostrictive Material
Aiming at the problems of low injection rate,wide injection pulse and slow response rate of existing fuel injectors,a design scheme of high pressure common rail injectors driven by giant magnetic force was proposed.This paper briefly describes the overall design and working principle of the high pressure common rail injector,and a mathematical model is established on the basis of J iles-Atherton hysteresis model and hydraulic transmission theory.COMSOL is used to establish the simulation model of the driving part,and the output displacement and stress characteristics are analyzed.AMESim is used to establish the overall model of the injector,and the injection rate is analyzed.A test platform was built to verify the effectiveness of the design scheme of the high pressure common rail injector driven by giant magnetic force.The results show that when the coil current is 3.6 A,the maximum output displacement of the giant magnetostrictive rod can reach 52 μm.Under the pressure of 160 MPa,the minimum pulse width of oil injection is reduced from 1ms to 0.15 ms,and the pulse width-oil injection has a good linearity regardless of the length of the pulse width.The research results show that the proposed design scheme is feasible,which lays a theoretical and technical foundation for developing a high performance high pressure common rail injector.
万方数据
维普
