Improved processing and performance of GDI injector based on metal injection molding technology

Cheng, Qiang; Zhang, Zhendong; Guo, Hui; Xie, Nailiu

doi:10.3233/jae-131739

Cited by 17 publications

(3 citation statements)

References 11 publications

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“…The effect of the hysteresis on the response time of the magnetic induction relative to the current (the magnetic induction response time) is considered only for the coils with iron cores, such as the coils of MR dampers and solenoid valves. For these coils, after reducing the magnetic induction response time by designing the structures of the coil housing and iron core as the grooved structures or designing the iron core as the comb structure, 17,20 and selecting the iron core materials with high relative magnetic permeability and high resistivity, 4,16,17 the current response time can account for approximately half of the total response time. 17 Thus, shortening the current response time is of great significance in improving the response performances of MR dampers, solenoid valves, and electron guns.…”

Section: Introductionmentioning

confidence: 99%

A voltage waveform design method for shortening current response time of a coil

Dou

Long

Yao

et al. 2023

Circuit Theory & Apps

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SummaryCoils are widely used in magnetorheological dampers, solenoid valves, and electron guns, where a quick response of the magnetic induction to the excitation voltage is needed. To achieve a quick response, the response time of the magnetic induction relative to the current and that of the current relative to the voltage should be shortened as much as possible. The latter is dominant in the total response time and can be shortened by using voltage control with an increased resistance or current control. The current time responses of the Helmholtz coils based on voltage control with an increased resistance and current control are measured. The results indicate that the current response times of the coils based on voltage control with resistances of 23.7 and 162 Ω and current control with a resistance of 23.7 Ω are 235.3, 42.3, and 62.1 μs, respectively. The current time responses of the voltage control are smooth, while those of the current control have large oscillations. Based on Kirchhoff's equilibrium equation, an overshoot voltage waveform design method is proposed to shorten the current response time and eliminate the current oscillations. The experimental results show that the current time response is smooth, and the current response time can be shortened by 91.8%, 54.4%, and 68.9% in comparison with those of the former three control cases. The demonstration experiments of the effect of the different control methods on the electron‐beam scanning path and hot spot distribution show that the scanning path and dwell duration are closer to the expected ones with the proposed method. The proposed method is of great value for improving the damping performance of a magnetorheological damper, the accuracy of the fluid injection of a solenoid valve, and the accuracy of the electron‐beam thermal assessment.

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Section: Introductionmentioning

confidence: 99%

A voltage waveform design method for shortening current response time of a coil

Dou

Long

Yao

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Cheng et al [31,32] and Zhong et al [33] established that the Eddy current loss of the HSV can be reduced and its dynamic response speed can be improved by optimizing the drive strategy. Cheng et al [34] designed an HSV with an Fe-based nano-crystalline soft magnetic alloy using metal injection molding technology, which improved the performance of soft magnetic materials, reduced the Eddy current loss of the HSV, and improved the dynamic response speed. Dai et al [35] and Zhao et al [25,26] found that grooving on the iron core can suppress the Eddy effect to a certain extent and enhance the dynamic response speed of the HSV.…”

Section: Introductionmentioning

confidence: 99%

Eddy Effect and Dynamic Response of High-Speed Solenoid Valve with Composite Iron Core

Liu,

Zhang,

Zhao

et al. 2023

Materials

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To alleviate the Eddy effect of the high-speed solenoid valve (HSV) and improve its dynamic response speed, a novel HSV with a composite iron core is presented. The time-step finite element method is used to establish and verify the numerical simulation of HSV coupling multiple physical fields. Then, the Eddy effect and dynamic response characteristics of the conventional and composite HSVs are further compared and analyzed. The results showed that the Eddy current loss in the main pole was the largest for the conventional HSV, accounting for 72.5% and 64.4% in the actuation and release processes, respectively. It was found that the Eddy effect of the composite HSV was obviously weakened, and the total Eddy current losses in the actuation and release processes were reduced by 58.8% and 38.7%, respectively. Meanwhile, the actuation response time and release response time of the composite HSV were shortened by 15.6% and 18.5%, respectively. In addition, increasing the peak voltage further shortened the actuation response time of the composite HSV, but had no significant effect on the response time of the conventional HSV.

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“…For example, Wang et al [17] used AL-Fe material to prove by experiment that new soft magnetic material could significantly improve the performance of high-speed electromagnetic digital valve. Cheng et al [18] designed the corresponding magnetic circuit based on the application of soft magnetic alloy material. Control rod hydraulic drive mechanism (CRHDM) of Institute of Nuclear and New Energy Technology, Tsinghua University innovates the mechanical structure.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and Static Characteristics of Double Push Rods Electromechanical Converter

Wang

Quan

Luan

et al. 2019

Chin. J. Mech. Eng.

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Due to the influence of material characteristics and winding power, single output electromagnet has limited ability to improve the dynamic characteristic of electro-hydraulic valve. Therefore, an electromechanical converter with double push rods is proposed in this paper, which can simultaneously output two electromagnetic forces, can push or pull the valve core and sleeve according to the current direction and realize rapid operation of load. According to the electromagnetic principle and the magnetic circuit analysis method, the mathematical model and equivalent circuit of the electromechanical converter with double push rods are established. Through the finite element simulation model of the electromechanical converter with double push rods with the same magnetization directions, the changing rules of its magnetic field distribution and force-displacement behaviors are studied and analyzed. According to the analysis results, the electromagnetic mechanical parameters and mechanical structure of the electromechanical converter with double push rods are determined, and the prototype is made. The test platform for the push-pull characteristics of the electromechanical converter with double push rods is built, and its static and dynamic characteristics are tested and analyzed. The results show that the thrust and pull output characteristics of the internal and external push rods are basically consistent with the simulation output, and proportional to the current density of the coil; the push-pull hysteresis of internal and external push rods output force is less than 5%; and the dynamic time response characteristics of the displacement and force are obtained. The hysteresis effect of output force is improved effectively through the H bridge drive control circuit modulated by PWM. Compared with the displacement response of a singlewinding electromagnet with a similar volume, it can effectively improve the dynamic displacement response. Followup work will further optimize the structure of the electromechanical converter and test the corresponding pilot valve. The research results provide a new theory for improving the output characteristics of electro-hydraulic pilot valve and have an extremely high engineering application value and broad application prospect.

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Improved processing and performance of GDI injector based on metal injection molding technology

Cited by 17 publications

References 11 publications

A voltage waveform design method for shortening current response time of a coil

A voltage waveform design method for shortening current response time of a coil

Eddy Effect and Dynamic Response of High-Speed Solenoid Valve with Composite Iron Core

Dynamic and Static Characteristics of Double Push Rods Electromechanical Converter

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