Hydraulic Characterization of Solenoid-actuated Injectors for Diesel Engine Common Rail Systems

Ferrari, Alessandro; Mittica, Antonio; Paolicelli, Federica; Pizzo, Pietro

doi:10.1016/j.egypro.2016.11.111

Cited by 31 publications

(8 citation statements)

References 6 publications

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“…This shows that the closing delay of the injector is shorter at high injection pressure and when the excitation duration is shorter. The observed trend was similar to that of solenoid-actuated diesel common rail injectors as reported by Ferrari et al [26]. This is because it takes time for the electrical energy from the control unit to overcome the resistance of the injector's closing spring.…”

Section: Hydraulic Delaysupporting

confidence: 87%

Hydraulic characterization of high-pressure gasoline multi-hole injector

Mohan

Sim

et al. 2018

Flow Measurement and Instrumentation

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Section: Hydraulic Delaysupporting

confidence: 87%

Hydraulic characterization of high-pressure gasoline multi-hole injector

Mohan

Sim

et al. 2018

Flow Measurement and Instrumentation

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“…In order to better model the upper part of the injection rate regarding the large injection events (ET=1ms), the high-pressure pump and the high pressure line upstream the common rail have to be modelled as well. This solution would require a lot of efforts, so a good approximation that take into account the pressure oscillations generated by the injection system can be the implementation of the pressure time evolution instead of the constant pressure value [41]. On the other hand, the main purpose of the work is to provide independence from the experimental conditions from which the model has been validated, enabling it to work in a wider range of inlet conditions.…”

Section: Variable Inlet Pressurementioning

confidence: 99%

“…This solution would require a lot of efforts, so a good approximation that takes into account the pressure oscillations generated by the injection system can be the implementation of the pressure–time evolution instead of the constant pressure value. 41 Figure 12(a) shows a typical pressure–time evolution during the single-injection event. Hence, a better fit in the stationary part of the injection rate, compared with the first approach curve, can be obtained without losing accuracy in the opening and closing phases as expected (Figure 12(b)).…”

Section: Model Validationmentioning

confidence: 99%

One-dimensional modeling of the interaction between close-coupled injection events for a ballistic solenoid injector

Payri

Morena

Pagano

et al. 2018

International Journal of Engine Research

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In the current paper, an investigation of a solenoid common-rail injector has been carried out to understand the hydraulic interactions between close-coupled injections events. For this purpose, a one-dimensional model of the injector was developed on GT-Suite software. The geometrical and hydraulic characteristics of the internal elements of the injector, needed to construct the model, were obtained by means of different custom-made experimental tools. The dynamic behavior of the injector was characterized using an EVI Rate of Injection meter. The hydraulic results from the model show a good alignment with the experiments for single injections, and a varied degree of success for multiple injections. Once the model was validated, it has been used to understand the injector performance under multiple injection strategies. The mass of a second injection has shown to highly depend on the electrical dwell time, especially at low values, mostly due to the dynamic pressure behavior in the needle seat. The critical dwell time, defined as the minimum electrical dwell time needed to obtain two independent injection events, has been numerically obtained on a wide range of operating conditions and correlated to injection pressure and energizing time of the first injection. Finally, the increase in the needle opening velocity of the second injection compared to the single-injection case has been analyzed for close-coupled injection events.

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“…Recent technologies have been developed to reduce fuel consumption and include engine downsizing [1], alternative fuels [2], innovative combustion concepts [3,4], advanced high-pressure injection systems [5][6][7][8][9][10], model-based control [11][12][13][14][15], advanced aftertreatment systems [16], kinetic and thermal energy recovery [17], vehicle lightweight [18], electrification of the powertrain [19], and vehicle connectivity [20].…”

Section: Introductionmentioning

confidence: 99%

Implementation and Assessment of a Model-Based Controller of Torque and Nitrogen Oxide Emissions in an 11 L Heavy-Duty Diesel Engine

Cococcetta¹,

Finesso

Hardy³

et al. 2019

Energies

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A previously developed model-based controller of torque and nitrogen oxides emissions has been implemented and assessed on a heavy-duty 11 L FPT prototype Cursor 11 diesel engine. The implementation has been realized by means of a rapid prototyping device, which has allowed the standard functions of the engine control unit to be by-passed. The activity was carried out within the IMPERIUM H2020 EU Project, which is aimed at reducing the consumption of fuel and urea in heavy-duty trucks up to 20%, while maintaining the compliance with the legal emission limits. In particular, the developed controller is able to achieve desired targets of brake mean effective pressure (BMEP) (or brake torque) and engine-out nitrogen oxides emissions. To this aim, the controller adjusts the fuel quantity and the start of injection of the main pulse in real-time. The controller is based on a previously developed low-throughput combustion model, which estimates the heat release rate, the in-cylinder pressure, the BMEP (or torque) and the engine-out nitrogen oxide emissions. The controller has been assessed at both steady-state and transient operations, through rapid prototyping tests at the engine test bench and on the road.

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Hydraulic Characterization of Solenoid-actuated Injectors for Diesel Engine Common Rail Systems

Cited by 31 publications

References 6 publications

Hydraulic characterization of high-pressure gasoline multi-hole injector

Hydraulic characterization of high-pressure gasoline multi-hole injector

One-dimensional modeling of the interaction between close-coupled injection events for a ballistic solenoid injector

Implementation and Assessment of a Model-Based Controller of Torque and Nitrogen Oxide Emissions in an 11 L Heavy-Duty Diesel Engine

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