The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

Desantes, J.M.; Benajes, Jesús; Molina, Santiago; Gonzalez, Cesar

doi:10.1016/j.applthermaleng.2004.05.003

Cited by 73 publications

(34 citation statements)

References 15 publications

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“…Desantes et al [7], [8] show influence of fuel injection characteristics on emission characteristics and parameters of combustion in one-cylinder engine. Weiser, in his doctorate thesis [9] presents results of direct measurements on 9-cylinder medium-speed engine, and Cooper [10] presents emission characteristics from chosen ships.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine with Fuel Injector Malfunctions

Kowalski¹

2016

Polish Maritime Research

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Section: Introductionmentioning

confidence: 99%

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine with Fuel Injector Malfunctions

Kowalski¹

2016

Polish Maritime Research

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“…First, the effects of injection rate shaping on the combustion and emissions characteristics are investigated. Injection rate shaping provides appropriate mixing conditions of fuel and air for increased efficiency and emissions reduction while injection pressure and duration are maintained [42][43][44]. Figure 8 shows the simulation result of combustion and emissions characteristics when implementing injection rate shaping and the varying the opening rate of the injector needle to change the injection rate.…”

Section: Numerical Analysis On the Effect Of Injection Rate Shaping Omentioning

confidence: 99%

Numerical Analysis of the Combustion and Emission Characteristics of Diesel Engines with Multiple Injection Strategies Using a Modified 2-D Flamelet Model

et al. 2017

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Abstract:The multiple injection strategy has been widely used in diesel engines to reduce engine noise, NO x and soot formation. Fuel injection developments such as the common-rail and piezo-actuator system provide more precise control of the injection quantity and time under higher injection pressures. As various injection strategies become accessible, it is important to understand the interaction of each fuel stream and following combustion process under the multiple injection strategy. To investigate these complex processes quantitatively, numerical analysis using CFD is a good alternative to overcome the limitation of experiments. A modified 2-D flamelet model is further developed from previous work to model multi-fuel streams with higher accuracy. The model was validated under various engine operating conditions and captures the combustion and emissions characteristics as well as several parametric variations. The model is expected to be used to suggest advanced injection strategies in engine development processes.

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“…Depending on the combustion strategy and engine demand, tuning the rate shape profile to yield a slower initial rate can reduce heat release rate and ultimately reduce NOx emissions [10]. "Boot-like" injection rate shapes have been shown to reduce NOx as well [11]. However, when short combustion times are required, a square rate shape represented as the 100% rate shape in Figure 12, can be achieved [9].…”

Section: Roi Experimentsmentioning

confidence: 99%

Comparison of JP-8 Sprays from a Hydraulically Actuated Electronically Controlled Unit Injector and a Common Rail Injector

Kurman¹,

Tess²,

Bravo³

et al. 2015

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)October 2015 SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTESReprinted from ABSTRACTJP-8 sprays from a hydraulically actuated electronically controlled unit injector (HEUI) and a common rail injector (CRIN) were investigated to compare the effects of the fuel delivery system on the spray behavior of the fuel. The fuel pressurization method between injectors is fundamentally different. The HEUI system utilizes engine oil to pressurize the fuel, whereas, the CRIN system pressurizes the fuel directly. To explore the different injection methods, rate of injection (ROI) experiments were initially conducted to measure shot-to-shot fuel quantity and rate of injection of both injector types. During the ROI experiments with the HEUI, the oil temperature and pressure was varied from 45°C to 90°C and 142-200 bar, respectively. In addition, the dwell time and rate shape of the HEUI was investigated to determine effects on injected fuel mass and rate of injection. Non-reacting spray experiments were performed in a high temperature (900 K), high pressure (60 bar) flow chamber to investigate the transient liquid penetration lengths of both injection systems. Ambient conditions of the flow chamber were chosen to represent typical conditions found in a compression-ignition engine and fuel injection pressures were 850, 1000, and 1200 bar. Results showed that an increase in oil temperature for the HEUI will increase the injected fuel mass. The CRIN injector system showed 4 times more precise control of injected fuel mass compared to the HEUI, and the CRIN showed less variations in the hydraulic delay. Comparing the plume to plume transient spray behavior of the two systems showed that more variations were present with the HEUI injector. However, the overall transient liquid penetration behavior was similar for both injection systems. Results of this study can be used to optimize the design of engines using JP-8 with hydraulic fuel injectors, thus improving fuel efficiency and power output. SUBJECT TERMSHEUI, JP-8, in...

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The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

Cited by 73 publications

References 15 publications

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine with Fuel Injector Malfunctions

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine with Fuel Injector Malfunctions

Numerical Analysis of the Combustion and Emission Characteristics of Diesel Engines with Multiple Injection Strategies Using a Modified 2-D Flamelet Model

Comparison of JP-8 Sprays from a Hydraulically Actuated Electronically Controlled Unit Injector and a Common Rail Injector

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