Characterization of In-Cylinder Techniques for Thermal Management of Diesel Aftertreatment

Parks, J. E.; Huff, Shean; Kass, Mike; Storey, John

doi:10.4271/2007-01-3997

Cited by 36 publications

(21 citation statements)

References 15 publications

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“…These results are coincident with the trend shown in post-injection efficiency with respect to post-injection timing. This conclusion is also consistent with the work presented by Parks et al [24], who established that the HC oxidation in the catalyst induces more efficient regeneration than the combustion inside the cylinders. It is also interesting to note that some post-injection strategies are not successful to complete the regeneration.…”

Section: Active Regeneration Analysissupporting

confidence: 93%

“…In order to maximise the regeneration efficiency it is typical to combine the post-injection strategies with other engine control actuations, such as to act on the exhaust gas recirculation (EGR) valve, aimed at increasing the exhaust temperature [22] or the closure of the intake throttle valve, limiting the air flow coming into the cylinders in order to achieve richer equivalence ratio mixtures and higher HC concentration during the main combustion event [23]. Parks et al [24] studied the relationship between the exhaust gas temperature and the optimal post-injection timing for the regeneration. They concluded that for low temperature it was necessary to cause an increase of the temperature inside the cylinder during the combustion so that the post-injection had to be performed relatively close to the main injection event to ensure its ignition.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

et al. 2019

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Late fuel post-injections are the most usual strategy to reach high exhaust temperature for the active regeneration of diesel particulate filters. However, it is important to optimise these strategies in order to mitigate their negative effect on the engine fuel consumption. This work aims at understanding the influence of the post-injection parameters, such as its start of injection and its fuel quantity, on the duration of the regeneration event and the fuel consumption along it. For this purpose, a set of computational models are employed to figure out in a holistic way the involved phenomena in the interaction between the engine and the exhaust gas aftertreatment system. Firstly, an engine model is implemented to evaluate the effect of the late fuel post-injection pattern on the gas properties at the exhaust aftertreatment system inlet in different steady-state operating conditions. These are selected to provide representative boundary conditions of the exhaust gas flow concerning dwell time, exhaust temperature and O 2 concentration. In this way, the results are later applied to the analysis of the diesel oxidation catalyst and wall-flow particulate filter responses. The dependence of the diesel particulate filter (DPF) inlet temperature is discussed based on the efficiency of each post-injection strategy to increase the exhaust gas temperature. Next, the influence on the dynamics of the regeneration of the post-injection parameters through the change in gas temperature and O 2 concentration is finally studied distinguishing the pre-heating, maximum reactivity and late soot oxidation stages as well as the required fuel consumption to complete the regeneration process.

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Section: Active Regeneration Analysissupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

et al. 2019

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“…The dual fuel injection concept with port injection of butanol or ethanol and direct injection of diesel has been previously utilized by researchers [19,31,33]. For the post injection, this study did not utilize a close-coupled injection, as in [22,26], but a more remote post injection as in [16,34]. The primary purpose of the remote post injection in the present study was to increase the exhaust gas temperature and to generate reactive species such as hydrogen and it was believed that a close-coupled injection would not be suitable for these purposes.…”

Section: Test Conditionsmentioning

confidence: 98%

A study of the effect of post injection on combustion and emissions with premixing enhanced fueling strategies

Jeftić

Zheng

2015

Applied Energy

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“…Researchers are continuously seeking methods for improving the aftertreatment systems [11][12][13][14][15]. One recent method is to apply VVT on engine systems and increase the aftertreatment inlet exhaust gas temperature [16].…”

Section: Introductionmentioning

confidence: 99%

Effects of application of variable valve timing on the exhaust gas temperature improvement in a low-loaded diesel engine

Başaran

Özsoysal

2017

Applied Thermal Engineering

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Characterization of In-Cylinder Techniques for Thermal Management of Diesel Aftertreatment

Cited by 36 publications

References 15 publications

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

A study of the effect of post injection on combustion and emissions with premixing enhanced fueling strategies

Effects of application of variable valve timing on the exhaust gas temperature improvement in a low-loaded diesel engine

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