Variable Weight Coefficient Optimization of Gearshift Actuator With Direct-Driving Automated Transmission

Yu, Xiao; Li, Bo; Zhang, Tiezhu; Tan, Cao; Hu, Yan

doi:10.1109/access.2019.2963708

Cited by 16 publications

(11 citation statements)

References 22 publications

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“…This prototype is pull-open type. The moving-coil electromagnetic linear actuator 25,27,28 is taken as the driver and the mushroom-type poppet plastic valve is taken as the executing component. The plastic valve is chosen here for its better closure reliability than metal valve.…”

Section: Model and Research Methodsmentioning

confidence: 99%

Influence of injection valve opening manner and injection timing on mixing effect of direct injection compressed natural gas–fueled engine

Wang

Zhang

Bei

et al. 2020

International Journal of Engine Research

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In order to improve the control precision of in-cylinder mixing and combustion process, and to avoid the engine power drop because of the port fuel injection mode, it becomes a tendency to inject gas fuel into cylinder directly, with the help of the high-pressure gas-fueled injection device. However, considering that the mixing speed of gas fuel with air is usually slower than that of gasoline or diesel, the gas fuel direct injection mode tends to cause poor mixing performance and insufficient combustion in engine. Based on this situation, in-cylinder mixing process of direct injection gas–fueled engine is taken as the research object in this article. The three-dimensional transient computational fluid dynamics model of the injection and mixing process in gas-fueled direct injection engine is established to analyze the effects of the poppet valve opening manner and injection timing on the in-cylinder mixing homogeneity. The results indicate that delaying the injection timing can improve the wall impact strength and help to form a tumble flow in the cylinder. The stronger wall impact and tumble flow can reverse the natural diffusion law and greatly improve the in-cylinder mixing effect. Under the same injection timing conditions, although the pull-open valve has a larger injection penetration distance, the in-cylinder mixing effect is still worse than the push-open one. This is because, for the push-open valve, the fuel jet will be around the slope of the valve, which is beneficial to improve the mixing effect.

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Section: Model and Research Methodsmentioning

confidence: 99%

Influence of injection valve opening manner and injection timing on mixing effect of direct injection compressed natural gas–fueled engine

Wang

Zhang

Bei

et al. 2020

International Journal of Engine Research

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“…Eqns. (18) and (19) are fundamental for magnetic modelling and are considered generalizations of Ampere's and Gauss's laws, respectively [13].…”

Section: Finite Element Methodsmentioning

confidence: 99%

“…The magnitudes present in Maxwell's Eqns. (18) and (19) are the magnetic field H (A/m); magnetic induction B (T); the current surface density J (A/m 2 ); electrical induction D (C/m 2 ).…”

Section: Finite Element Methodsmentioning

confidence: 99%

“…A basic flowchart of the PSO is illustrated in Figure 4. Therefore, as presented by Lobato et al [16,18], it is noted that the PSO comprises an extremely simple concept, since it only needs primitive mathematical operators for its implementation. This is advantageous because it generates a low-cost computational process, both in terms of memory and speed.…”

Section: Particle Swarm Optimizationmentioning

confidence: 99%

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Optimal Coil Design of an Electromagnetic Actuator Using Particle Swarm Optimization

Chiarello¹,

Malagoli²

2020

JESA

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This paper aims to reduce the heating of the electromagnetic actuators of a magnetic bearing. The electrical current of the coils was above normal, so the need for a new coil design to reduce heating due to high currents. In this scenario, the proposed methodology allows minimizing copper losses using Particle Swarm Optimization, so that the best result of the design parameters will be used in the construction of the new coil for the actuator. For the development of this work, it was decided to use a computational tool for public use, FEMM (Finite Element Method Magnetics) to simulate the electromagnetic device. In the simulations, the densities of magnetic fluxes in the core and in the air gap are shown, as well as the energies, electromagnetic forces and losses in the copper of the electromagnetic actuator winding. Finally, an optimal model of the actuator is obtained through the use of optimization techniques. Therefore, the results obtained demonstrate that the proposed methodology is configured as an interesting strategy for the purpose of this work.

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“…Its performance affects the energy utilization efficiency of the FPEG. Many researchers have been working on the design of the linear motor for an FPEG [5][6][7]. Wang [8] proposed and designed a three-phase moving-magnet Electronics 2020, 9, 621 3 of 11 linear motor for the application of an FPEG.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Loss Analysis of a Linear Motor System Designed for a Free-Piston Engine Generator

Yang

et al. 2020

Electronics

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A free-piston engine generator is a new type of power generating device, which has the advantages of high efficiency and simple structure. In this paper, a linear motor system composed of a moving-coil linear motor with axial magnetized magnets and a H-bridge pulse-width modulation (PWM) rectifier is designed for portable free-piston engine generators. Based on the finite-element model of the motor and physical model of the rectifier, the combined electromagnetic model is presented and then validated by the prototype-tested results. The electromagnetic processes of the linear motor system are simulated. The electromagnetic losses during the standard working cycle are analyzed. Under the rated reciprocating frequency of 50 Hz and the rated reciprocating stroke of 36 mm, the mechanical-to-electrical energy conversion efficiency of 86.3% can be obtained by the linear motor system, which meets the requirement of portable free-piston engine generators.Electronics 2020, 9, 621 2 of 11 mover assembly moves down from the TTC to BTC driving by the combustion pressure.During the stable running, the linear motor works in generating mode all the time. The electromotive force (EMF) in the coil of the motor is quasi-sine wave, and the generating current in the coil is controlled as standard sine wave by the rectifier, and the electrical energy will be stored in the battery in the form of direct current. During the starting of the device, the linear motor must work briefly in motoring mode to start the motion of the piston-mover assembly.

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Variable Weight Coefficient Optimization of Gearshift Actuator With Direct-Driving Automated Transmission

Cited by 16 publications

References 22 publications

Influence of injection valve opening manner and injection timing on mixing effect of direct injection compressed natural gas–fueled engine

Influence of injection valve opening manner and injection timing on mixing effect of direct injection compressed natural gas–fueled engine

Optimal Coil Design of an Electromagnetic Actuator Using Particle Swarm Optimization

Electromagnetic Loss Analysis of a Linear Motor System Designed for a Free-Piston Engine Generator

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