Analysis of Particulate Matter Sensor Signals

Bender, Dieter; Jones, James C. Peyton; Harshbarger, Daniel

doi:10.4271/2012-01-0871

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…In order to remove the frequency noises, the values of instantaneous filtration efficiencies are low-pass filtered. [31][32][33] Figure 4 shows an example of an off-cycle behavior of the resistive soot sensor obtained by the accumulation rate method during a test run of a vehicle mounted with a 3.0 L, V6 common-rail diesel engine. 32 The bottom plot in the figure shows the vehicle speed profile which comprises three driving patterns of an urban, highway, and interstate roads.…”

Section: Accumulation Rate Methodsmentioning

confidence: 99%

“…There are various approaches to predict the soot concentration from the resistive soot sensor signal. 6,[31][32][33] The approaches could be classified as the accumulation rate method or the accumulation time method. 34 Figure 3.…”

Section: Resistive Soot Sensormentioning

confidence: 99%

“…The accumulation rate method calculates with an algorithm the instantaneous DPF efficiency from the temporal variation of the sensor resistance and ECU variables. 31 This method performs the calculation in two steps: conversion of the sensor resistance to the deposited soot mass and conversion of the soot mass to the post-DPF soot concentration. The measured voltage is filtered to remove a high-frequency noise and is converted to the sensor resistance R ( t ).…”

Section: Cumulative Soot Sensormentioning

confidence: 99%

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A review of soot sensors considered for on-board diagnostics application

Kamimoto

2016

International Journal of Engine Research

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If emissions control systems and engine control devices experience a failure, the engine system may malfunction causing exhaust emissions to exceed the standard levels of the regulated emissions. Thus, the functional status of each of all primary control devices needs to be monitored for detecting possible failures, so that the proper action can be taken to warn the vehicle operator. This article reviews a soot sensor currently developed for on-board diagnostics to monitor a diesel particulate filter and detect the failure. Original equipment manufacturers have selected a resistive soot sensor for the on-board diagnostics application because of its commercial feasibility in terms of functionality and cost. The sensor accumulates soot particles in exhaust gas on the sensing element. Structure, design, and function of the cumulative sensor including the signal processing techniques are described. Since the sensor signal contains noises and fluctuations, the post-diesel particulate filter soot concentration is repeatedly measured over 100 times and averaged in order to ensure the measurement accuracy, so that the diesel particulate filter failures can be detected. In addition to the resistive soot sensor, this article reviews the status of currently developed continuous soot sensors such as an electrostatic sensor, an electrical charging sensor, and a radio frequency-based sensor. These sensors have major issues of packaging and cost to be resolved prior to application to production vehicles. This review article is based primarily on scientific literatures most of which were published a few years ago, but the development of new soot sensor concepts has been continuing in the industry. Three new soot sensor concepts all of which are under development are also reported.

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Section: Accumulation Rate Methodsmentioning

confidence: 99%

Section: Resistive Soot Sensormentioning

confidence: 99%

Section: Cumulative Soot Sensormentioning

confidence: 99%

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A review of soot sensors considered for on-board diagnostics application

Kamimoto

2016

International Journal of Engine Research

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“…The diesel engine has been in a state of constant development for the past 50 years, or more, because of its ability to provide reliable power for many applications, at a more efficient level than the gasoline fueled SI engines. [5,16]. As PM is deposited on the electrodes, an electrical contact forms between them, and the resistance between electrodes begins to decrease.…”

Section: Discussionmentioning

confidence: 99%

“…Delphi has begun the development of a downstream PM sensor that uses technology similar to that of Bosch Lambda sensors [5], where the collecting sensing element is based existing multi-layer ceramic sensor technology. According to Ochs et al [5] and Bender et al [16], the sensing element is composed of two inter-digitated comb-like electrodes (IDE) with an infinite electrical resistance, an internal heater, and a temperature measuring element.…”

Section: Introductionmentioning

confidence: 99%