Experimental Investigation on Three Different Ceramic Substrate Materials for a Diesel Particulate Filter

Andreata, Maurizio; Millo, Federico; Mallamo, Fabio; Mercuri, Davide; Pozzi, Chiara

doi:10.4271/2013-24-0160

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Therefore, Equation (1) through (3) indicate that the soot oxidation rate is primarily determined by the current carbon-loading level in the DPF and the regeneration temperature: the higher the oxidation rate is, the more heat is released from the reaction per unit time; the peak temperature and maximum temperature gradient also increase within the DPF. According to the literature [25,30], the peak temperature within the DPF during active regeneration is linearly correlated with the maximum temperature gradient. Therefore, by analyzing the peak temperature within the DPF, the risk of DPF failure caused by uncontrolled regeneration during the active regeneration of the DPF can be fully evaluated, and the safe regeneration temperature can be determined.…”

Section: Dpf Safe Regeneration Temperaturementioning

confidence: 99%

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Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

Sun

Liu

et al. 2022

Processes

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The ignition temperature of a diesel oxidation catalyst (DOC) and the internal temperature-field distribution of the diesel particulate filter (DPF) during active regeneration are investigated during an engine bench test in this study. Based on the dropped to idle (DTI) test, a test method is developed to determine the safe regeneration temperature of the DPF. The results show that when the inlet temperature of the DOC is more than 240 °C, the DOC begins ignition and reaches the target temperature of 600 °C set for active regeneration of DPF; when the inlet exhaust temperature of the DOC is between 240 and 280 °C, a higher injection rate is required to reduce the secondary pollution of HC and thus make the DPF reach the set target temperature as soon as possible. The active regeneration process of the DPF is divided into three stages. During ignition, the temperature of the DPF inlet and outlet increases rapidly and successively. The internal and outlet temperatures of DPF during regeneration are approximately 50 °C higher than the inlet temperature. At the end of regeneration, the DPF inlet to outlet temperature drops rapidly. A feed-forward design and feedback algorithm are used to verify the change in the target regeneration temperature. The overshoot of the DPF control strategy was less than 3%, and the steady-state temperature control error was less than 20 °C. The results of this study provide a basis for the safe control of DPFs’ active regeneration temperatures.

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Section: Dpf Safe Regeneration Temperaturementioning

confidence: 99%

“…Therefore, effective management and reliable control of the temperature during DPF active regeneration, to reduce the risk of DPF failure, is particularly complex and thus requires systematic research and integrated development [23][24][25][26][27]. In this paper, the extreme working conditions of the DPF are simulated.…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

Sun

Liu

et al. 2022

Processes

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“…In the first step of the research activity [28], the three different substrates were characterized over the NEDC to evaluate the impact of the different substrate material properties on engine back pressure and thus on fuel consumption. For each component three NEDC tests were run a chassis dyno measuring CO 2 emissions: the first test was executed with an empty DPF, the second and the third ones with 8 g/L and 11 g/L soot loadings respectively.…”

Section: Experimental Investigation Of Exhaust Back Pressure and Fuelmentioning

confidence: 99%

Impact on vehicle fuel economy of the soot loading on diesel particulate filters made of different substrate materials

Millo

Andreata

Rafigh

et al. 2015

Energy

Self Cite

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“…The use of a diesel particulate filter for PM reduction in the after-treatment system has become essential in light-duty diesel vehicles after implementation of the Euro-4 emission regulation (2004), and DPFs are now used in all diesel vehicles (DPF: more than 90% PM reduction) [ 6 ]. In the case of PM, it is completely dependent on the DPF system.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Resistive PM Sensors for Onboard Diagnostics of Diesel Particulate Filter Failure

Lee

Jeong

2022

Sensors

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In accordance with the recently reinforced exhaust regulations and onboard diagnostics regulations, it is essential to adopt diesel particulate filter systems in diesel vehicles; a sensor that directly measures particulate matter (PM) in exhaust gas is installed to precisely monitor diesel particulate filter (DPF) failure. Because the reduction of particulate matter in the diesel particulate filter system is greatly influenced by the physical wall structure of the substrate, the presence or absence of damage to the substrate wall (cracks or local melting, etc.) determines the reliability of normal DPF operation. Therefore, an onboard diagnostics sensor for particle matter is being developed with a focus on monitoring damage to the DPF wall. In this study, as a sensor for determining damage to the substrate wall, an accumulation-type sensor whose resistance changes as soot particles are deposited between two electrodes was fabricated. The sensor characteristics were investigated by changing the gap between the sensor electrodes, sensor cap shape, and electrode bias voltage to improve resistive soot sensor sensitivity and response. From the signal characteristics of various sensor configurations, a combination sensor with improved signal stability and response time is manufactured, and they were compared with the characteristics of commercially available sensors in the engine-simulated NEDC mode in terms of the degree of DPF crack. As a result of transient mode, PM monitoring cycle was improved by 1.2~1.5 times during the same vehicle driving time compared to the existing commercial sensor.

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Experimental Investigation on Three Different Ceramic Substrate Materials for a Diesel Particulate Filter

Cited by 9 publications

References 13 publications

Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

Impact on vehicle fuel economy of the soot loading on diesel particulate filters made of different substrate materials

Characteristics of Resistive PM Sensors for Onboard Diagnostics of Diesel Particulate Filter Failure

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