Influencing Parameters on the Microwave-Based Soot Load Determination of Diesel Particulate Filters

Feulner, Markus; Seufert, Florian; Müller, Andréas; Hagen, Gunter; Moos, Ralf

doi:10.1007/s11244-016-0626-7

Cited by 12 publications

(17 citation statements)

References 14 publications

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“…The test procedure is depicted in Figure 2 . In contrast to previous works on microwave-based DPF monitoring, where a constant particle concentration was present in the exhaust [ 3 , 6 ], here, different operation points (①–⑦) with a distinct soot emission rate were achieved by varying several engine parameters. This leads to different soot loading rates of the filter within the test.…”

Section: Methodsmentioning

confidence: 99%

“…This technique has been introduced by several groups and is considered very promising [ 3 , 4 , 5 ]. In our own previous studies, the microwave-based filter monitoring was tested under constant engine operation conditions [ 3 , 6 ]. Recently, Sappok et al showed that the microwave-based system is also suitable for applications under non-steady operation conditions [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Different Methods for Soot Sensing and Filter Monitoring in Diesel Exhausts

Feulner

Hagen

Hottner

et al. 2017

Sensors

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Due to increasingly tighter emission limits for diesel and gasoline engines, especially concerning particulate matter emissions, particulate filters are becoming indispensable devices for exhaust gas after treatment. Thereby, for an efficient engine and filter control strategy and a cost-efficient filter design, reliable technologies to determine the soot load of the filters and to measure particulate matter concentrations in the exhaust gas during vehicle operation are highly needed. In this study, different approaches for soot sensing are compared. Measurements were conducted on a dynamometer diesel engine test bench with a diesel particulate filter (DPF). The DPF was monitored by a relatively new microwave-based approach. Simultaneously, a resistive type soot sensor and a Pegasor soot sensing device as a reference system measured the soot concentration exhaust upstream of the DPF. By changing engine parameters, different engine out soot emission rates were set. It was found that the microwave-based signal may not only indicate directly the filter loading, but by a time derivative, the engine out soot emission rate can be deduced. Furthermore, by integrating the measured particulate mass in the exhaust, the soot load of the filter can be determined. In summary, all systems coincide well within certain boundaries and the filter itself can act as a soot sensor.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Study of Different Methods for Soot Sensing and Filter Monitoring in Diesel Exhausts

Feulner

Hagen

Hottner

et al. 2017

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…A design model of microwave based regeneration system is developed as shown in figure 2. Microwave radiations produced by Vector Network Analyzers (VNA) were used by Feulner et al, for determining the soot loading in the DPF [69]. Electromagnetic filed is impressed to the filter housing which acts as resonator through one or two ports.…”

Section: ′ + ′' = (5)mentioning

confidence: 99%

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Kurien¹

2019

Journal of Thermal Engineering

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The toxic nature of exhaust gases released by these engines has led to environmental concerns, affecting its sustainability. The exhaust emission from diesel engine includes carbon monoxide, nitrates, hydrocarbons and particulate matter. Soot particles contained in the particulate matter is also found to be carcinogenic in nature and also leads to various lung diseases. Diesel oxidation catalysis system involves oxidation of hydrocarbons, nitrates and soluble organic fraction. Diesel particulate filtration blocks the soot particles with the help of alternately plugged diesel particulate filter with porous walls. The regeneration of accumulated soot is one of the major challenges faced by automotive industries for effective implementation of diesel particulate filtration system. A detailed review on the challenges faced in the implementation of emission control techniques has been carried out in this study and it has been explored from the results of literature study that microwave based regeneration technique would be an effective technique. This paper provides a platform for understanding the working principle of post treatment emission control techniques and also on the role of regeneration in effective operation of Diesel Particulate Filter.

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“…There are already strategies to distinguish between soot and ash loading [21]. Important noise factors are soot humidity and temperature [22]. Unlike systems that are designed for TWC, where an operation in the resonance mode is envisaged, mostly transmission measurements are conducted [23].…”

Section: (3) Particulate Filtersmentioning

confidence: 99%

Sensing Catalytic Converters and Filters at Work Using Radio Frequencies

et al. 2018

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The state of catalysts and filters plays a key role in automotive exhaust gas aftertreatment. The soot or ash loading of particulate filters (GPF or DPF), the oxygen loading of three-way catalysts (TWC), the amount of stored ammonia in SCR catalysts, or the NOx loading degree in NOx storage catalysts (NSC) are important parameters. Today, they are determined indirectly based on models that are calibrated by gas or pressure sensors in the exhaust pipe. This contribution overviews a novel approach that determines directly the state of the devices by a radio frequency based technique. For that purpose, the housing of the devices serves as a cavity resonator. As “sensing” element, one or two simple antennas are mounted in the catalyst canning. This contactless-obtained information correlates very well with the catalyst or filter state.

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Influencing Parameters on the Microwave-Based Soot Load Determination of Diesel Particulate Filters

Cited by 12 publications

References 14 publications

Comparative Study of Different Methods for Soot Sensing and Filter Monitoring in Diesel Exhausts

Comparative Study of Different Methods for Soot Sensing and Filter Monitoring in Diesel Exhausts

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Sensing Catalytic Converters and Filters at Work Using Radio Frequencies

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