The Dynamics of Pump-Line-Nozzle Fuel Injection Systems

Strunk, Richard D.

doi:10.4271/911818

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…Strunk [10] showed how the design variables may in#uence the performance of a pump}line}nozzle injection system and provided guidelines for its tuning. These results were based on a simpli"ed mathematical model for the hydraulic circuit of the systems.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Dynamic Responses of an Automotive Fuel Rail System, Part I: Injector

Qin

Stottler

et al. 2001

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 99%

Modelling of Dynamic Responses of an Automotive Fuel Rail System, Part I: Injector

Qin

Stottler

et al. 2001

Journal of Sound and Vibration

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“…The collapse of these bubbles will generate high pressure waves propagating through the pipe, which will lower the performance of the system, produce vibration and noise, and even cause damage to the pipe and valve surfaces [6]. Many researchers [4,9,10] have attempted to simulate the transient wave propagation in the pumpline-nozzle system, which is widely used in diesel engine. But they didn't consider the possible formation of cavitation and its effect on the transient flows.…”

Section: Introductionmentioning

confidence: 99%

Direct Calculations of Cavitating Flows in Fuel Delivery Pipe by the Space-Time CE/SE Method

Qin¹,

Yu²,

Lai³

1999

SAE Technical Paper Series

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In this paper, we report direct calculations of cavitating pipe flows by the method of Space-Time Conservation Element and Solution Element, or the CE/SE method for short. The tenet of the CE/SE method is treating space and time as one entity, and the calculation of flow properties is based on the local and global space-time flux conservation. As a contrast to the modern upwind schemes, no Riemann solver is used, thus the logic of the present scheme for cavitating flows is much simpler. Two numerical examples are reported in this paper: (1) a hydraulic shock problem, and (2) a cavitating pipe flow. For the hydraulic shock problem, we demonstrate the capability of the CE/SE method for capturing contact discontinuities in cavitating fluids. For the pipe flows, a two-phase homogeneous equilibrium cavitation model is employed. In both cases, numerical results compared favorably with the experimental data and analytical solution.

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Potential of the Synthetic Fuel Oxymethylene Ether (OME) for the Usage in a Single-Cylinder Non-Road Diesel Engine: Thermodynamics and Emissions

Zacherl

Wopper

Schwanzer³

et al. 2022

Energies

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Non-road sectors, such as agriculture and construction machinery, require high energy densities and flexibility in use, which is why diesel engines are mainly used. The use of climate-neutral fuels, produced from renewable energies, such as Oxymethylene Ether (OME) as a diesel substitute, can significantly reduce CO2 and pollutant emissions in these sectors. In addition to CO2 neutrality, OME also offers improved combustion characteristics compared to diesel fuel, eliminating the soot–NOx trade-off and thus enabling new opportunities in engine design and calibration. In this paper, the combustion of pure OME on a close-to-production, single-cylinder non-road diesel engine with a pump–line–nozzle injection system is analyzed. A variation of the center of combustion at constant power output was performed for diesel and OME at different operating points. Two injectors were investigated with OME. A study on ignition delay and a detailed thermodynamic analysis was carried out. In addition, the exhaust emissions CO, NOx, VOC, as well as particulate-matter, -number and -size distributions were measured. With OME, a significantly shorter ignition delay as well as a shortened combustion duration could be observed, despite a longer injection duration. In addition, the maximum injection pressure increases. VOC and CO emissions are reduced. Particulate matter was reduced by more than 99% and particle number (>10 nm) was reduced by multiple orders of magnitude. The median of the particle size distribution shifts from 60 to 85 nm (diesel) into a diameter range of sub 23 nm (OME). A significant reduction of NOx emissions with OME enables new degrees of freedom in engine calibration and an efficiency advantage without hardware adaption.

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The Dynamics of Pump-Line-Nozzle Fuel Injection Systems

Cited by 4 publications

References 10 publications

Modelling of Dynamic Responses of an Automotive Fuel Rail System, Part I: Injector

Modelling of Dynamic Responses of an Automotive Fuel Rail System, Part I: Injector

Direct Calculations of Cavitating Flows in Fuel Delivery Pipe by the Space-Time CE/SE Method

Potential of the Synthetic Fuel Oxymethylene Ether (OME) for the Usage in a Single-Cylinder Non-Road Diesel Engine: Thermodynamics and Emissions

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