Mass flow rate control of solenoid-based injectors

Abstract

This paper presents a mass flow rate control method for solenoid-based injectors in open-loop, that is, without physical sensor feedback. Measuring the mass flow rate in injectors is important because the performance of the injector determines fuel consumption and emissions. While it is possible to perform this control using different types of sensors, this would increase the cost and reduce the reliability. With this study, it was aimed to control the mass flow rate of solenoid-based injectors using continuous switching control to regulate the injector’s needle displacement without using sensors. For this purpose, a solenoid-actuated injector prototype was created. Model-based estimators were used to determine the states of the injector, while a super-twisting sliding mode controller was used to track the desired mass flow rate references. The results of the experiments showed that tracking for sinusoidal, triangular, and square trajectories yielded a mass flow rate percent error of less than 1.06. The proposed open-loop control algorithm can be used to track different mass flow rate references in internal combustion engines.

Optimization Design of DC Electromagnet Coil Considering the Power Consumption and Cost

“…Aiming at the switching electromagnet, the power supply usually adopts the constant voltage source [21,22], so the excitation current I in the coil can be expressed as follows: $$$$ I=\frac{U}{R_t}=\frac{U}{J\left(1+{\alpha}_d{t}_d\right)} $$$$ where U is the excitation voltage of constant voltage source, and J is the constant.…”

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

“…As an automatic control component, the high-speed solenoid valve (HSV) has been widely used in hydraulic and pneumatic fields because of its simple structure, fast response speed, low price, and high reliability [1][2][3][4][5]. Such applications include the fuel quantity control of the electronic fuel injection system [6][7][8][9][10][11], the pressure adjustment of the automobile brake system [12][13][14], the process control of material processing [15,16], etc. Faster dynamic response speeds of HSVs can realize the more accurate adjustment of flow and pressure of the controlled system [17,18].…”