Multidimensional Modeling of Direct Injection Diesel Engine with Split Multiple Stage Fuel Injections

Hiwase, Subhash Deo; Moorthy, S.; Dumpa, Mahendra; Metkar, Rajesh M.

doi:10.1016/j.proeng.2013.01.095

Cited by 18 publications

(8 citation statements)

References 6 publications

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“…Engines are designed to treat average diesel fuel according to the standards (Zöldy 2020). Fuel injection during one engine cycle is split into 2…7 parts to maintain the desired burn rate and through this engine performance and raw emission (Hiwase et al 2013;Agarwal et al 2013). This flexibility in injection timing, pressure and length (Jurić et al 2019) could only be achieved with the appearance of CR injection systems, which separate pressure generation from fuel metering (Stumpp, Ricco 1996).…”

Section: Introductionmentioning

confidence: 99%

Effects of Boundary Conditions on a Bosch-Type Injection Rate Meter

Vass

Zöldy

2021

Transport

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Spread and evolution of Common Rail (CR) injection systems enable to influence injection events more efficiently than ever, while injection mass flow rate during an injection event crucially affects the combustion process. A measurement device based on the work of Bosch was set up, and measurements were made with different boundary conditions to explore the capabilities of the measurement system and to validate a detailed model of a CR injector. The main finding of this research work is, that orifice size had no noticeable effect on the measured injection rate traces, while it was stated in the original work that a small orifice is needed to terminate the measuring tube to maintain stable measurement conditions. Moreover, the backpressure level in the measuring system has a significant effect on the measured injection traces. If pressure in the measuring tube is low, gradient at the injection rate rise is lower, while if the pressure is comparable with that of a combustion chamber maximal compression pressure, measurement of higher doses is unaccomplishable due to the long pressure decrease time in the measuring tube after the end of the injection. Based on the results of the investigation, it can be stated that the Bosch-type injection rate measurement method does not give back the exact injection rate shape, a supplementing method would be necessary to calculate real nozzle flow rate.

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Section: Introductionmentioning

confidence: 99%

Effects of Boundary Conditions on a Bosch-Type Injection Rate Meter

Vass

Zöldy

2021

Transport

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“…Despite the efforts made by original equipment manufacturers (OEMs) to optimize the internal combustion engine (ICE) operation, there is still much to do in terms of performance optimization. In the last years, efforts have been mainly focused on the reduction of N O x and soot emissions by means of different injection strategies, 1 high-pressure fuel injection systems, 2 multiple injections, 3 high boost pressure, 4 exhaust gas recirculation (EGR), 5,6 variable valve timing, 7,8 high swirl ratios (SR), 9–11 and new clean fuels. 12,13 However, the impossibility to overcome the regulation only managing internal processes has led to the widespread use of aftertreatment systems such as diesel particulate filter (DPF) to cut down soot emissions and lean NO x trap (LNT) or selective catalytic reduction (SCR) to reduce N O x emissions, giving room to the other main engine issue, that is, engine fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the efforts made by OEMs to optimize the ICE operation, there is still much to do in terms of performance optimization. In the last years, the efforts have been mainly focused on the reduction of N O X and soot emissions by means of different injection strategies [1], high pressure fuel injection systems [2], multiple injections [3], high boost pressure [4], exhaust gases recirculation (EGR) [5,6], variable valve timing [7,8], high swirl [9,10,11] and tumble ratios [12,13] and new clean fuels [14,15]. However, the impossibility to overcome the regulation only managing internal processes, has led to the generalization of aftertreatment systems [16], giving room to the other main engine issue: engine fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

Application of a zero-dimensional model to assess the effect of swirl on indicated efficiency

Broatch

Martín

García

et al. 2018

International Journal of Engine Research

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Increasing internal combustion engine efficiency continues being one of the main goals of engine research. To achieve this objective, different engine strategies are being developed continuously. However, the assessment of these techniques is not straightforward due to their influence on various intermediate phenomena inherent to the combustion process, which finally result in indicated efficiency trade-offs. During this work, a new methodology to assess these intermediate imperfections on gross indicated efficiency using a zero-dimensional model is developed. This methodology is applied to a swirl parametric study, where it has been concluded that the heat transfer and the rate of heat release are the single relevant changing phenomena. Results show that heat transfer always increases with swirl affecting negatively gross indicated efficiency (around −0.5%), while the impact of combustion velocity is not monotonous. It is enhanced up to a certain swirl ratio (it changes with engine speed) at low engine speed (resulting in an increment of +1.7% in gross indicated efficiency), but it is slowed down at high engine speed with the consequent worsening of gross indicated efficiency (−0.8%).

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“…The current diesel engines are mostly equipped with advanced high pressure common rail fuel injection system and electronic system, through which the fuel injection strategy can be accurately controlled, and even multiple injections can be achieved [7,8]. The in-cylinder combustion process can be improved through the optimization of fuel injection strategy, and the engine noise caused by combustion can be reduced accordingly [9].…”

Section: Introductionmentioning

confidence: 99%