Transient measuring method for injection rate of each nozzle hole based on spray momentum flux

Luo, Fei; Cui, Huifeng; Dong, Shaofeng

doi:10.1016/j.fuel.2014.02.011

Cited by 34 publications

(21 citation statements)

References 30 publications

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“…Therefore, a diesel engine that is equipped with a highpressure common rail system has the potential to achieve the optimized design goals of high-efficiency combustion and ultralow emission [1][2][3][4][5]. The common rail injector is one of the high-pressure common rail system's critical components, with a direct influence on the cycle fuel injection quantity fluctuation, gas-liquid two-phase flow characteristics of highpressure fuel in the nozzle, fuel atomization characteristics in the cylinder, and air-fuel mixture quality [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Electromagnetic Models of High‐Speed Solenoid Valve for Common Rail Injector

Zhao

Fan

Liu

et al. 2017

Mathematical Problems in Engineering

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A novel formula easily applied with high precision is proposed in this paper to fit the -curve of soft magnetic materials, and it is validated by comparison with predicted and experimental results. It can accurately describe the nonlinear magnetization process and magnetic saturation characteristics of soft magnetic materials. Based on the electromagnetic transient coupling principle, an electromagnetic mathematical model of a high-speed solenoid valve (HSV) is developed in Fortran language that takes the saturation phenomena of the electromagnetic force into consideration. The accuracy of the model is validated by the comparison of the simulated and experimental static electromagnetic forces. Through experiment, it is concluded that the increase of the drive current is conducive to improving the electromagnetic energy conversion efficiency of the HSV at a low drive current, but it has little effect at a high drive current. Through simulation, it is discovered that the electromagnetic energy conversion characteristics of the HSV are affected by the drive current and the total reluctance, consisting of the gap reluctance and the reluctance of the iron core and armature soft magnetic materials. These two influence factors, within the scope of the different drive currents, have different contribution rates to the electromagnetic energy conversion efficiency.

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Section: Introductionmentioning

confidence: 99%

Investigation on Electromagnetic Models of High‐Speed Solenoid Valve for Common Rail Injector

Zhao

Fan

Liu

et al. 2017

Mathematical Problems in Engineering

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show abstract

“…1) used for measuring the transient spray momentum flux of each nozzle hole [22], a P-type multi-hole microsac injector with the opening pressure of 20 MPa were used in the experimental set up, the basic injector parameters obtained from the manufaturer's drawing are as follows: the number of holes is 5, the hole diameter is 0.2 mm, the hole length is 0.8 mm, the inclination angle is shown in Fig. 2, the inlet rounding of each hole is 0.15 lm and the k-factor of the each hole is 0.…”

Section: Numerical Simulations Of Injection Rate Of Each Nozzle Holementioning

confidence: 99%

“…According to reference [22], spray force, spray momentum and injection rate have the following relationships:…”

Section: Numerical Simulations Of Injection Rate Of Each Nozzle Holementioning

confidence: 99%

Numerical simulation of injection rate of each nozzle hole of multi-hole diesel injector

Deng

Cui

et al. 2016

Applied Thermal Engineering

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“…Injection rates were calculated by measuring the spray impact forces of each hole based on the spray momentum flux while the fuel injection pressures of injector were measured by calibrated piezoelectric sensor [9].…”

Section: Experimental Set-upmentioning

confidence: 99%

“…This corresponds to the injection rate shown in Figure 4, which is the result of the discrepancies in flow characteristics of each nozzle hole due to layout parameters [13]. In order to further understand the consistency among diesel nozzle holes under various working conditions, an evaluating parameter, C n , (non-uniform coefficient of cyclical fuel injection quantities among nozzle holes) is defined [9]. It is the maximum difference of the fuel 02016-p.5 injection quantity within each hole divided by the mean value of the fuel injection quantity of each hole.…”

Section: Variation Of the Cycle Fuel Injection Quantitiesmentioning

confidence: 99%

A Study on the Influence of Fuel Pipe on Fuel Injection Characteristics of Each Nozzle Hole in Diesel Injector

Luo

Wang

Xue

et al. 2016

MATEC Web of Conferences

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Abstract. The inner diameter of high pressure fuel pipe has a significant effect on the fuel injection process and the performance of a diesel engine. The spray impact force of each nozzle hole of a conventional injection system of pump-line-nozzle for diesel engine (based on the spray momentum flux) and the injection pressure (on a fuel injection pump test rig) were measured. With varying fuel injection quantities and pump speed, the effects of the inner diameter of the high pressure fuel pipe on fuel injection process and the fuel injection characteristics of each nozzle hole were analyzed. It was noted from experimental results that the fuel injection pressure changes with variations in the inner diameter of the high pressure fuel pipe and also the injection duration gradually increases with increase in the inner diameter. .At low injection pump speed, even with the same geometric fuel deliver rate, the injection duration also increases gradually. Due to throttling effect and reduction in injection pressure, the fuel injection quantities of the injection nozzle were relatively minimal when the inner diameters of the high pressure fuel pipe were respectively small and large. The optimum injection pipe inner diameter for the right quantity for fuel injection falls between the two cases (between small and large). In addition, the injection rate of each nozzle hole increases with the decrease in angle between the needle axis and each of the nozzle hole axis. The fuel injection quantity of each nozzle hole increases while their relative difference decreases with increasing pump speed.

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Transient measuring method for injection rate of each nozzle hole based on spray momentum flux

Cited by 34 publications

References 30 publications

Investigation on Electromagnetic Models of High‐Speed Solenoid Valve for Common Rail Injector

Investigation on Electromagnetic Models of High‐Speed Solenoid Valve for Common Rail Injector

Numerical simulation of injection rate of each nozzle hole of multi-hole diesel injector

A Study on the Influence of Fuel Pipe on Fuel Injection Characteristics of Each Nozzle Hole in Diesel Injector

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