Potential and Challenges of a 3000 Bar Common-Rail Injection System Considering Engine Behavior and Emission Level

Wloka, J.; Pflaum, S.; Wachtmeister, Georg

doi:10.4271/2010-01-1131

Cited by 43 publications

(16 citation statements)

References 4 publications

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“…Given the trends in the automotive industry, today it is necessary to have a resource of about 500 thousand km. It gives to designer the task of increasing the reliability of the most vulnerable elements of the diesel injectors: friction pairs, injector cone seat, nozzle holes and injector nozzle tip [1][2][3][4][5].…”

Section: Analysis Of Referencesmentioning

confidence: 99%

Modeling Of Hydrodynamic Processes in Diesel Injector Nozzle

Wróblewski¹

2019

mech

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Section: Analysis Of Referencesmentioning

confidence: 99%

Modeling Of Hydrodynamic Processes in Diesel Injector Nozzle

Wróblewski¹

2019

mech

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“…As will be shown in this paper, and by others [2,3], Euro VI NOx emissions can be achieved through in-cylinder means alone with only particulate aftertreatment, but this approach has not been adopted by vehicle manufactures to date due to the impact of such a strategy on the engine boost system and fuel consumption.…”

mentioning

confidence: 91%

The Benefits of High Injection Pressure on Future Heavy Duty Engine Performance

Morgan¹,

Banks²,

Auld³

et al. 2015

SAE Technical Paper Series

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Diesel fuel injection pressures have increased steadily on heavy duty engines over the last twenty years and pressures as high as 300MPa are now possible. This was driven by the need to control toxic exhaust emissions, in particular particulate emissions using advanced in-cylinder combustion strategies. With the introduction of efficient aftertreatment systems for both particulate and NOx emissions control there is less demand for in-cylinder emissions control especially considering the drive for improved fuel economy. In this paper we consider the benefit of high fuel injection pressure for a number of emissions control strategies with different balances of in-cylinder and exhaust aftertreatment emissions control. A test program was undertaken on a single cylinder heavy duty research engine installed at the University of Brighton, in collaboration with Ricardo. The engine was fitted with the Delphi F2E fuel injection system capable of 330MPa injection pressure and multiple fuel injections. The engine intake system was configured to give independent control of the intake pressure and EGR rates, achieving rates of up to 50% at high engine loads. The benefit of high injection pressure was investigated under a number of strategies for achieving Euro VI emissions levels. The trade-off of controlling NOx emissions using EGR rate and aftertreatment on engine performance and Total Cost of Ownership (TCO) was investigated. Finally, the benefit of a simple split injection strategy at high rail pressure was studied.

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“…Johnson et al [10] studied the injection rate and spray characteristics of a diesel injector in the range of 2000-3000 bar. Wloka et al [11] combined internal nozzle flow simulations with single-cylinder engine testing, showing that these injection pressure levels combined with a proper nozzle geometry design can lead to soot emissions reduction. Mohan et al [12] confirmed through multi-cylinder engine testing that the use of ultra-high injection pressures could help to reduce soot emissions, and also engine efficiency and CO/HC emissions.…”

Section: Introductionmentioning

confidence: 98%

Study of new prototype pintle injectors for diesel engine application

Payri

Morena

Battiston

et al. 2016

Energy Conversion and Management

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a b s t r a c tA new prototype common rail injector featuring a complete new nozzle design concept was exhaustively characterized both from the hydraulic and spray formation point of view. A commercial injection rate meter together with a spray momentum test rig were used to determine the flow characteristics at the nozzle exit. A novel high pressure and high temperature chamber (up to 15 MPa and 1000 K) was used to determine liquid length and vapor penetration. Using these tools, three different pintle nozzle designs, with specific features in the outlet section, were studied. The test matrix included a sweep of injection pressure up to 2000 bar and a sweep of ambient temperature up to 950 K. The results obtained show that pintle nozzles offer great potential in terms of fuel mass flux controlled by variable nozzle geometry. Effects in the hydraulic measurements and spray images due to the variable geometry were observed and characterized.

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Potential and Challenges of a 3000 Bar Common-Rail Injection System Considering Engine Behavior and Emission Level

Cited by 43 publications

References 4 publications

Modeling Of Hydrodynamic Processes in Diesel Injector Nozzle

Modeling Of Hydrodynamic Processes in Diesel Injector Nozzle

The Benefits of High Injection Pressure on Future Heavy Duty Engine Performance

Study of new prototype pintle injectors for diesel engine application

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