Injection Quantity Range Enhancement by Using Current Waveform Control Technique for DI Gasoline Injector

Kusakabe, Ryo; Abe, Motoyuki; Ehara, Hideharu; Ishikawa, Toru; Mayuzumi, Takuya; Miyake, Takao

doi:10.4271/2014-01-1211

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…These equations describe the de-energizing state of solenoids and perform test results satisfactorily. In [13], an injection quantity simulator was developed to investigate the relation between armature and the injection quantity, and it devised a current waveform control technique to reduce the armature bounce, so the linearity of the injection quantity characteristics is improved. In [14], a novel magnetic levitation system using the eddy current repulsion mechanism is proposed, finite-element approach is used for the analysis of the magnetic field, the structure showed a larger repulsive force comparing to the general electromagnetic, and the precision of the control system can be higher.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Force Of High-Speed Solenoid Valve Based On Correlation Analysis

Fei

Liu

et al. 2015

International Journal on Smart Sensing and Intelligent Systems

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High-speed solenoid valve (HSV) is the heart of electronic control fuel system for diesel engines, whose electromagnetic force (EF) determines the dynamic response speed of fuel system. The finite element model of HSV has been established and validated by experiment. Methods of experimental design and correlation analysis have been used for the simulation experiment. The effect laws of six key parameters' interactions on EF under HSV's overall operating conditions have been revealed from the results of the simulation. In addition, three key second-order factors' interaction principles are explained. Results show that under overall operating conditions HSV's EF is influenced not only by its parameters singly, but also parameters' interactions. Index terms: High-speed solenoid valve, electronic control fuel system, experimental design, interaction principles.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Force Of High-Speed Solenoid Valve Based On Correlation Analysis

Fei

Liu

et al. 2015

International Journal on Smart Sensing and Intelligent Systems

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“…When the coil is energized, a magnetic field develops around the coil, which passes through the magnetic core, the external housing, and the armature, 7 as illustrated in Figure 1. This field creates both axial and radial forces within the coil, which tend to compress the coil in the axial direction and expand the coil in the radial direction.…”

Section: Resultsmentioning

confidence: 99%

“…Several methods have been developed to reduce nonlinearity and/or armature bounce, including optimization of the electromagnetic geometry, 5 armature mass reduction, 6 non-rigid coupling of the armature to the needle, 7 and modulation of the current waveform. 7,8 Measurement of motions of the internal components is critical to understanding and improving injectors. The most common measurement of interest is the axial motion, or lift, of the armature and/or valve needle.…”

Section: Introductionmentioning

confidence: 99%

Measurement of needle and armature dynamics in a gasoline direct injector by high-speed neutron imaging

Wissink,

Toops,

Splitter

et al. 2023

International Journal of Engine Research

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In modern spark ignition engines, precise delivery of fuel with gasoline direct injection has become increasingly important in the effort to meet ever stricter efficiency and emissions regulations. Use of multiple small close-coupled injections has become more common in attempt to precisely control fuel distribution in the cylinder, but these strategies are hindered by nonlinear injection effects due to operation in the ballistic region of the solenoid-operated valve and due to armature bounce at the end of injection. Understanding the internal dynamics of the injector is crucial to minimizing and controlling non-linearity and shot-to-shot variation, but the experimental techniques available to date are capable only of tracking the position of either the top of the needle (via laser sensors or by monitoring current and voltage in the solenoid coil) or the bottom of the needle (via transparent nozzles or high-speed x-ray imaging). A complete picture of the axial and radial motion of valve needle has until now remained elusive. In this work, we present high-speed ensemble neutron transmission imaging of an entire 8-hole gasoline direct injector operating at 200 bar, allowing for both visualization and quantification of the actuation dynamics including lift and wobble of the valve ball, oscillation and bending of the valve needle, lift, rocking, and bounce of the armature, compression of the springs, and radial swelling of the solenoid during energization. Because neutrons offer high penetration through the metal injector while also being sensitive to the 1H nuclei in fuel molecules, it is also possible to simultaneously see the fluid dynamics of the injection process, including filling of the sac volume, emanation of the spray through the nozzle holes and into the downstream gas, and the formation and evolution of fuel films on the tip of the injector and the walls of the spray container.

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“…It was proven in [ 13 ] that the use of thermodynamic models and their analysis can be used to improve the efficiency of fuel combustion and the use of energy contained in it. Kusakabe et al [ 14 ] presented a simulation model that takes into account the magnetic resistance of the injector core, nonlinearities in its dynamics, and magnetic force. Based on the simulations, it was found that the observed nonlinearity results from the residual magnetic force.…”

Section: Introductionmentioning

confidence: 99%

Electric Current Waveform of the Injector as a Source of Diagnostic Information

Więcławski

Mączak

Szczurowski

2020

Sensors

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The article discusses the method of evaluation of the fuel injector operation based on the observation of the electric current parameters, which were measured with a current transducer using the Hall effect, during the dosing process. This method relies on comparison of the electric current-related values of the examined injector with the model characteristics, which are representing the properly functioning injector. A model of the fuel injector in the form of the electric current waveform that describes the changes in the electric current and voltage during its work is presented in this article. Complex equations describing the fuel injector model under discussion account for the characteristics of the current variations, with no damage-induced modifications. Due to these, the modeled electric current/voltage waveform mirrors the real conditions. The use of a mathematical model describing the voltage–current phenomena occurring during the injector operation allows determining the actual beginning and duration of the injection. The model can also be used to develop new injector diagnostic methods that can be implemented in the engine controller (ECU).

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Injection Quantity Range Enhancement by Using Current Waveform Control Technique for DI Gasoline Injector

Cited by 5 publications

References 5 publications

Electromagnetic Force Of High-Speed Solenoid Valve Based On Correlation Analysis

Electromagnetic Force Of High-Speed Solenoid Valve Based On Correlation Analysis

Measurement of needle and armature dynamics in a gasoline direct injector by high-speed neutron imaging

Electric Current Waveform of the Injector as a Source of Diagnostic Information

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