Development of the Particulate Matter Sensor for Diesel Engine

Kim, Dong Gu; Yang, Sang‐Hyeok; Kim, Hyun Soo

doi:10.1007/s12239-019-0035-6

Cited by 4 publications

(2 citation statements)

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“…However, many difficulties are encountered in the practical application of these methods onboard a vehicle, such as device complexity and harsh installation environments in terms of vibration and temperature, and these technologies involve optical access, high impedance, low current, or high time-resolution, which drives increased complexity and presents new durability challenges [ 19 ]. In contrast, the accumulation-type sensors, such as (i) electrical resistance-type [ 20 , 21 , 22 ] and (ii) charge storage-type [ 23 ] sensors, have relatively simple structures and are suitable for use as onboard sensors in vehicles. Moreover, their reliability is high even in harsh environments, such as exhaust pipes, and their manufacturing costs are low.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

“…Moreover, their reliability is high even in harsh environments, such as exhaust pipes, and their manufacturing costs are low. For these reasons, accumulation-type sensors have been commercialized and installed in many diesel vehicles (electric resistance sensor—Bosch, Delphi sensors) [ 21 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%