Experimental Study and Numerical Interpretation on the Temperature Field of DPF during Active Regeneration with Hydrocarbon Injection

Tong, Dehui; Zhang, Jun; Wang, Guoyang; Yang, Bo; Cai, Kaiyuan; Liu, Shiyu; Abdalla, Aniseh Ahmed Atef; Shuai, Shijin

doi:10.4271/2018-01-1257

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…The soot mass can also decrease (ii) if the exhaust gas temperatures are high enough to cause a passive regeneration (also referred as "spontaneous") (Bai et al, 2016). Active regeneration (Tong et al, 2018) is triggered by raising the exhaust gas temperature using fuel post-injection. If current driving conditions (i.e.…”

Section: Case Study Backgroundmentioning

confidence: 99%

A Reliability Inspired Strategy for Intelligent Performance Management With Predictive Driver Behaviour: A Case Study for a Diesel Particulate Filter

et al. 2021

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The increase availability of operational data from the fleets of cars in the field offers opportunities to deploy machine learning to identify patterns of driver behaviour. This provides contextual intelligence insight that can be used to design strategies for online optimisation of the vehicle performance, including compliance with stringent legislation. This paper illustrates this approach with a case study for a Diesel Particulate Filter, where machine learning deployed to real world automotive data is used in conjunction with a reliability inspired performance modelling paradigm to design a strategy to enhance operational performance based on predictive driver behaviour. The model-in-the-loop simulation of the proposed strategy on a fleet of vehicles showed significant improvement compared to the base strategy, demonstrating the value of the approach.

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Section: Case Study Backgroundmentioning

confidence: 99%

A Reliability Inspired Strategy for Intelligent Performance Management With Predictive Driver Behaviour: A Case Study for a Diesel Particulate Filter

et al. 2021

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“…Regarding the effect of soot loading quantity, experiment results show that the internal peak temperature and maximum temperature gradient of DPF are positively correlated with the initial soot loading quantity, and negatively correlated with the exhaust mass flow rate [9]. Especially when the engine is running under drop-to-idle conditions, the influence of the soot loading quantity on the regeneration temperature performance is particularly prominent [10,11].…”

Section: Introductionmentioning

confidence: 98%

Impact Factors Analysis of Diesel Particulate Filter Regeneration Performance Based on Model and Test

et al. 2021

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In the application of DPFs (diesel particulate filters), temperature prediction and control technology during the regeneration phase has always been a great challenge, which directly affects the safety and performance of diesel vehicles. In this study, based on theoretical analysis and sample gas bench test results, a one-dimensional simulation model is built with GT-POWER software. The effects of soot loading quantity and oxygen concentration on regeneration temperature performance are studied. Simulation results show that, when the soot loading quantity exceeds 46 g (12.7 g/L), the maximum temperature inside DPF during the regeneration phase would be higher than 800 °C, and the risk of burning crack would be high. When the oxygen concentration in the exhaust gas is low (lower than 7%), the fuel injected into exhaust gas fails to give off enough heat, and the exhaust gas temperature fails to reach the target regeneration temperature, hydrocarbon emission could be found from the DPF outlet position; when the oxygen concentration in the exhaust gas reaches 7% or above, the DPF inlet temperature could reach the target temperature, accompanied by less hydrocarbon emission. Combined with the simulation results, engine test bench validation was carried out. The results show that the simulation results and test results agree well.

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“…Ash accumulation in the DPF would affect the DPF performance and also deteriorate the engine fuel economy. 14 While the performance and characteristics of the DPFs with no ash have been well studied, 15–18 few studies emphasized the lubricant-derived ash effects on DPF performance. Among the few studies, several studies focused on the ash effects on DPF pressure drop behaviors.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of lubricant-derived ash effects on diesel particulate filter performance

Zhang

Wong

et al. 2019

International Journal of Engine Research

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Diesel particulate filters are indispensable for diesel engines to meet the increasingly stringent emission regulations. A large amount of ash would accumulate in the diesel particulate filter over time, which would significantly affect the diesel particulate filter performance. In this work, the lubricant-derived ash effects on diesel particulate filter pressure drop, diesel particulate filter filtration performance, diesel particulate filter temperature field during active regeneration, and diesel particulate filter downstream emissions during active regeneration were studied on an engine test bench. The test results show that the ash accumulated in the diesel particulate filter would decrease the diesel particulate filter pressure drop due to the “membrane effect” when the diesel particulate filter ash loading is lower than about 10 g/L, beyond which the diesel particulate filter pressure drop would be increased due to the reduction of diesel particulate filter effective volume. The ash loaded in the diesel particulate filter could significantly improve the diesel particulate filter filtration efficiency because it would fill the pores of diesel particulate filter wall. The diesel particulate filter peak temperature during active regeneration is consistent with the diesel particulate filter initial actual soot loading density prior to regeneration at various diesel particulate filter ash loading levels, while the diesel particulate filter maximum temperature gradient would increase with the diesel particulate filter ash loading increase, whether the diesel particulate filter is regenerated at the same soot loading level or the same diesel particulate filter pressure drop level. The ash accumulation in the diesel particulate filter shows little effects on diesel particulate filter downstream CO, total hydrocarbons, N2O emissions, and NO2/NO x ratio during active regeneration. However, a small amount of SO2 emissions was observed when the diesel particulate filter ash loading is higher than 10 g/L. The ash accumulated in the diesel particulate filter would increase the diesel particulate filter downstream sub-23 nm particle emissions but decrease larger particle emissions during active regeneration.

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Experimental Study and Numerical Interpretation on the Temperature Field of DPF during Active Regeneration with Hydrocarbon Injection

Cited by 11 publications

References 12 publications

A Reliability Inspired Strategy for Intelligent Performance Management With Predictive Driver Behaviour: A Case Study for a Diesel Particulate Filter

A Reliability Inspired Strategy for Intelligent Performance Management With Predictive Driver Behaviour: A Case Study for a Diesel Particulate Filter

Impact Factors Analysis of Diesel Particulate Filter Regeneration Performance Based on Model and Test

Experimental study of lubricant-derived ash effects on diesel particulate filter performance

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