WO2016200132A1 - 입자상 물질 센서 및 이를 포함하는 배기가스 정화 시스템 - Google Patents
입자상 물질 센서 및 이를 포함하는 배기가스 정화 시스템 Download PDFInfo
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- WO2016200132A1 WO2016200132A1 PCT/KR2016/006044 KR2016006044W WO2016200132A1 WO 2016200132 A1 WO2016200132 A1 WO 2016200132A1 KR 2016006044 W KR2016006044 W KR 2016006044W WO 2016200132 A1 WO2016200132 A1 WO 2016200132A1
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- electrode
- particulate matter
- electrodes
- area
- exhaust gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
- G01N25/32—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/20—Sensor having heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a particulate matter sensor and an exhaust gas purification system including the same, and more particularly, to a particulate matter sensor and an exhaust gas purification system including the same that can improve detection sensitivity and shorten a response time.
- the most efficient and practical approach to reducing particulate matter is an exhaust gas reduction device using a soot filtration device.
- a particulate matter sensor (PM sensor) is mounted at the rear of the DPF filter, and the particulate matter sensor PM has a resistance method and a total capacitance method.
- Resistive particulate matter sensor (PM sensor) of the above method is a plurality of external electrodes disposed on the surface side by side, the particulate matter is deposited between the external electrodes, the external by the precipitated particulate matter (PM) By forming a current between the electrodes and measuring the change in electrical conductivity of the sensor, it is possible to easily detect particulate matter passing through the exhaust gas particulate filter and exiting downstream.
- the capacitive type is composed of a plurality of external electrodes arranged side by side on the surface, and a plurality of internal electrodes arranged in the up / down direction with a plurality of external electrodes, the area of the particulate matter deposited between the external electrodes And by measuring the capacitance between the external electrode and the internal electrode using the distance between the external electrode and the internal electrode, it is possible to easily detect particulate matter passing through the exhaust gas particulate filter and exiting downstream.
- the response time of the initial current formed between the external electrodes may be determined according to the rate at which particulate matter is deposited between the external electrodes.
- the conventional particulate matter sensor has a problem that the response time of the initial current due to precipitation of particles is very slow because the external electrodes are formed to have a width wider than the width of the external electrodes.
- the plurality of external electrodes are each provided with a capacitive portion for measuring the capacitance between the sensitive portion and the internal electrode on which the particulate matter is deposited, the sensitive portion and the capacitive portion are formed adjacent to each other. Accordingly, when the sensitive portion on which the particulate matter is deposited is exposed to the high temperature exhaust gas, the capacitive portion formed at a position adjacent to the sensitive portion is also affected by the temperature delivered from the exhaust gas.
- a sudden change in dielectric constant occurs in a high temperature environment due to the characteristics of the material.
- a sudden change in dielectric constant occurs around 600 ° C.
- the capacitive part formed at a position adjacent to the sensitive part is also affected by the high temperature, thereby realizing a constant capacitance between the external electrode and the internal electrode due to a sudden change in dielectric constant.
- a problem that is difficult to do is difficult to do.
- the particulate matter sensor applies heat through the heater unit to remove particulate matter deposited on the particulate matter sensor in the refresh process for reuse.
- the temperature of the insulating substrate is increased by the heat applied from the heater unit.
- the temperature of the insulating substrate may be generally raised to more than 650 °C 2200 °C.
- the present invention has been made in view of the above, and an object thereof is to provide a particulate matter sensor and an exhaust gas purification system including the same capable of shortening the response time of the capacitance and improving the detection sensitivity.
- another object of the present invention is to provide a particulate matter sensor and an exhaust gas purification system including the same that can realize a constant capacitance even in a high temperature environment in which the dielectric constant of an insulating substrate is rapidly changed.
- Another object of the present invention is to provide a particulate matter sensor and an exhaust gas purification system which can be used immediately after the refresh process for reuse without waiting time.
- the first electrode unit may include a plurality of edge electrodes arranged to surround the plurality of spaced electrodes and a plurality of extension electrodes extending in parallel in one direction from the edge electrodes, wherein each of the spaced electrodes includes a pair of neighboring electrodes.
- the sensitive unit may be disposed between the extension electrodes or between adjacent extension electrodes and edge electrodes.
- the edge electrode may include a first connection electrode connected to the ends of the plurality of extension electrodes and a second connection electrode extending in parallel with the extension electrode from both ends of the first connection electrode.
- intervals between the extension electrodes disposed adjacent to each other may be formed to be the same.
- the sensitive portion and the capacitive portion may be formed to have a predetermined area, and the second area of the capacitive portion may have a relatively larger area than the first area of the sensitive portion.
- the second area of the capacitive part may be two times or more than the first area of the sensitive part.
- the sensitive portion and the capacitive portion may be spaced apart from each other via a lead having a predetermined length.
- the entire length of the lead portion connecting the sensitive portion and the capacitive portion may be formed to have a length equal to or longer than the total length of the sensitive portion.
- the capacitor electrode may have an area corresponding to the capacitor.
- the entire area of the sensitive portion may be formed to have a smaller area than the total area of the capacitive portion.
- a dielectric layer may be disposed between the first electrode portion and the second electrode portion.
- the apparatus may further include a temperature sensing unit disposed between the second electrode unit and the heater unit to control the heater unit.
- the insulating substrate may be alumina or ZTA.
- the particulate matter sensor may be mounted to expose the sensitive portion on the side of the exhaust pipe connected to the rear end of the exhaust gas particulate filter of the vehicle.
- the present invention exhaust exhaust manifold; An exhaust gas particulate filter for removing particulates contained in exhaust gas discharged from the exhaust manifold; And the above-described particulate matter sensor installed at an outlet side exhaust pipe connected to the exhaust gas particulate filter to detect particulate matter passing through the exhaust gas particulate filter and exiting downstream.
- the conduction area of the first electrode portion is widened so that the capacitance value between the first electrode portion and the second electrode portion can be amplified.
- the present invention can increase the detection sensitivity of the capacitance measured between the first electrode portion and the second electrode portion by forming a larger area of the capacitance portion of the separation electrode that substantially changes the capacitance of the particulate sensor than the sensitive portion. Can be.
- the capacitance between the first electrode part and the second electrode part is changed because the space between the sensitive part and the extended electrode connected by the particulate matter is disposed between the extending electrodes so as to be widened.
- the response time taken can be shortened.
- the capacitive portion on which particulate matter is deposited and the capacitive portion for sensing the capacitance are spaced apart at predetermined intervals through the lead portion, the capacitive portion does not cause a sudden change in permittivity even when the sensitive portion is exposed to a high temperature environment. Since it can maintain a low temperature, it is possible to realize a constant capacitance without being affected by temperature even in a high temperature environment.
- the present invention can be reused without waiting time because no heat is applied to the side of the spaced part spaced apart even if the sensitive part is heated through the heater to remove particulate matter deposited on the sensitive part.
- FIG. 1 is a view schematically showing a particulate matter sensor according to an embodiment of the present invention
- FIG. 1 is an exploded view of FIG. 1;
- FIG. 3 is an enlarged view of a first electrode part applied to FIG. 1;
- FIG. 4A is a plan view illustrating a first electrode unit applied to FIG. 1;
- 4B is a plan view illustrating a second electrode unit applied to FIG. 1;
- FIG. 5 is a partial cross-sectional view taken from the direction A-A of FIG. 1,
- FIG. 6 is a partial cross-sectional view seen from the direction B-B of FIG. 1,
- FIG. 7 is a schematic view of a particulate matter sensor according to another embodiment of the present invention.
- FIG. 8 is a schematic view for showing the arrangement of the main configuration in FIG.
- FIG. 9 is a plan view showing a first electrode part applied to FIG. 7;
- FIG. 10 is a view illustrating a state in which particulate matter is deposited on the sensitive part of the first electrode part applied to FIG. 7;
- FIG. 11 is a view showing a capacitor portion and a second electrode portion applied to FIG. 7;
- FIG. 12 is a view schematically showing the overall configuration of the exhaust gas purification system of a vehicle diesel engine to which the particulate matter sensor according to the present invention can be applied.
- a turbine 13 may be installed in an exhaust manifold 12 of an engine 11, and a turbocharger interlocked with a turbine 13. As the 14 rotates, compressed air can be passed through the cooler 15 to an intake manifold (not shown), with a portion of the combustion exhaust discharged from the exhaust manifold 12 being reduced to the valve 16 and the cooler. Through the intake manifold (not shown).
- the exhaust pipe 18 connected to the exhaust manifold 12 is provided with a diesel oxidation catalyst (not shown) and an exhaust gas particulate filter 17 to process combustion exhaust gas. That is, unburned hydrocarbons (HC), carbon monoxide (CO) and nitrogen monoxide (NO) may be oxidized while the combustion exhaust gas discharged to the exhaust pipe 18 passes through an upstream diesel oxidation catalyst (not shown). While passing through the exhaust gas particulate filter 17 on the downstream side, particulate matter PM composed of soot particles, soluble organic components (SOF) and inorganic components can be collected.
- HC unburned hydrocarbons
- CO carbon monoxide
- NO nitrogen monoxide
- the diesel oxidation catalyst (not shown) can raise the exhaust temperature by the oxidative combustion of the fuel supplied at the time of forced regeneration of the exhaust gas particulate filter 17, or can oxidize and remove the SOF component in particulate matter.
- NO2 generated by oxidation of NO can be used as an oxidizing agent of particulate matter deposited on the exhaust gas particulate filter 17 in the subsequent stage to enable continuous oxidation.
- the exhaust gas particulate filter 17 may be formed with a plurality of thin holes penetrating the cell wall partitioning the gas flow path, and may trap particulate matter in the exhaust gas introduced into the exhaust gas particulate filter 17.
- the diesel oxidation catalyst and the exhaust gas particulate filter 17 may be configured as a continuous regenerative diesel particulate filter.
- the exhaust pipe 18 may be provided with a differential pressure sensor 19 to monitor the amount of particulate matter deposited on the diesel particulate filter 17.
- the differential pressure sensor 19 is connected with the upstream side and the downstream side of the exhaust gas particulate filter 17, and can output the signal according to the front-back differential pressure.
- a temperature sensor (not shown) is provided upstream of the diesel oxidation catalyst and upstream and downstream of the exhaust gas particulate filter 17 to monitor the respective exhaust temperatures.
- the control circuit (not shown) monitors the catalytically active state of the diesel oxidation catalyst or the particulate matter trapping state of the diesel particulate filter 17 based on these outputs, and when the particulate matter trapping amount exceeds the allowable amount, the control circuit (for example) performs forced regeneration to recover the particulate matter. Regeneration control for combustion removal can be performed.
- the particulate matter sensor 100 or 200 according to the present invention is installed in the outlet side exhaust pipe 18a connected to the rear end of the exhaust gas particulate filter 17 and passes through the exhaust gas particulate filter 17 and the exhaust pipe to exit downstream. Can be detected.
- Such particulate matter sensors 100 and 200 may include an insulating substrate 110, a first electrode part 120 and 220, a second electrode part 130 and 230, and a heater part 140 as shown in FIGS. 1 and 7. have.
- the insulating substrate 110 may be formed by stacking a plurality of insulating layers along a height direction, and may be formed of an insulator having heat resistance, such as a glass material, a ceramic material, a spinel, or titanium dioxide.
- the first to fifth insulating layers 111, 112, 113, 114, and 115 may be stacked in parallel with each other, and the insulating substrate 110 may be alumina, or ZTA ( zirconia toughened alumina).
- the type and number of stacked layers of the insulating layer for forming the insulating substrate 110 is not limited thereto, and it may be found that the number of layers may be varied according to design conditions.
- the first electrode parts 120 and 220 may be provided to expose at least a portion of one surface of the insulating substrate 110 (see FIGS. 1 and 7).
- the first electrode parts 120 and 220 may include a plurality of spaced apart electrodes 121 and 221, an edge electrode 122, and a plurality of extension electrodes 123.
- the plurality of spacer electrodes 121 and 221 may be spaced apart from each other at regular intervals along the width direction of the insulating substrate 110 so as not to be electrically connected to each other.
- the plurality of spaced apart electrodes 121 and 221 may include a sensitive portion 121a and a capacitor 121b, respectively.
- the sensitive portion 121a and the capacitor 121b may have a predetermined area and may be formed at both end sides of the spaced electrodes 121 and 221, respectively.
- the sensitive portion 121a may be formed in a rectangular shape having a first area
- the capacitive part 121b may be formed in a rectangular shape having a second area.
- the sensitive part 121a may be provided to have a length corresponding to the length of the extension electrode 123, and may be disposed in parallel with the extension electrode 123, and disposed between adjacent extension electrodes 123. Or spaced apart from each other between the extension electrode 123 and the edge electrode 122.
- a deposition space 127 in which particulate matter is accumulated is formed in the space between the extension electrode 123 and the sensitive portion 121a arranged in parallel with each other, and the space between the edge electrode 122 and the sensitive portion 121a. Can be.
- the particulate matter is deposited in the deposition space 127 so that the sensitive portion 121a and the edge electrode 122 or the sensitive portion 121a and the extension electrode 123 that are not electrically connected may be electrically connected to each other. .
- the capacitor part 121b is formed at the other end side of the separation electrodes 121 and 221 and may be electrically connected to each other by particulate matter deposited in the deposition space 127. As a result, the conduction area of the first electrode parts 120 and 220 may be sequentially increased to measure the capacitance changed between the first electrode parts 120 and 220 and the second electrode parts 130 and 230.
- the second area of the capacitor portion 121b is larger than the first area of the sensitive portion 121a. Can be formed.
- the second area of the capacitive portion 121b may be formed to have an area of two times or more than the first area of the sensitive portion 121a, and the width of the capacitive portion 121b is greater than that of the sensitive portion 121a. It may have a width wider than the width.
- the capacitance formed between the capacitor portion 121b and the second electrode portions 130 and 230 increases, and the detection sensitivity of the capacitance can be increased.
- the edge electrode 122 may have a substantially rectangular frame shape and may be arranged to surround the plurality of spaced apart electrodes 121 and 221, and one side thereof may be disposed on one surface of the insulating substrate 110 through the lead unit 129. It may be electrically connected to the first electrical connection terminal 161.
- the edge electrode 122 may include a first connection electrode 122a to which an end of the extension electrode 123 is connected, and a length direction of the insulating substrate 110 from both ends of the first connection electrode 122a. It may include a pair of second connection electrode 122b extending along, and the pair of second connection electrode 122b may be connected to each other through a third connection electrode 122c having a predetermined length. .
- the first electrical connection terminal 161 may be disposed on the same surface as the first electrode portions 120 and 220.
- the extension electrodes 123 may be provided in plural, and may be spaced apart in parallel along the width direction of the insulating substrate 110 at predetermined intervals.
- the plurality of extension electrodes 123 may be electrically connected to the edge electrodes 122 by extending inwardly from the edge electrodes 122.
- the plurality of extension electrodes 123 may extend a predetermined length from the first connection electrode 122a in a direction parallel to the second connection electrode 122b, and are substantially the same as the sensitive part 121a. It may have a length.
- the plurality of spaced apart electrodes 121 and 221 may be provided with the sensitive unit 121a between the extension electrodes 123 neighboring each other or between the extension electrodes 123 and the second connection electrode 122b adjacent to each other. May be arranged to be located.
- deposition spaces 127 in which particulate matter may be deposited may be formed between the extension electrode 123 and the sensitive portion 121a and between the edge electrode 122 and the sensitive portion 121a.
- the particulate matter P is deposited in the deposition spaces 127 so that the second connection electrode 122b and the sensitive portion 121a which are adjacent to each other extend to each other.
- the electrode 123 and the sensitive portion 121a may be electrically connected to each other by the particulate matter.
- the particulate matter is sequentially deposited from the first space among the deposition spaces 127 so that the plurality of sensitive portions 121a may be sequentially connected to the edge electrode 122 or the extension electrode 123. Can be. Accordingly, the capacitance between the plurality of capacitor parts 121a and the second electrode parts 130 and 230 may be sequentially increased.
- the width of the sensitive portion 121a is formed to be smaller than the width of the capacitor 121b, and the sensitive portion 121a is disposed between the extension electrodes 123 adjacent to each other.
- the deposition space 127 in which particulate matter may accumulate between the sensitive portion 121a and the extension electrode 123 may be increased, and the area of the deposition space 127 in which particulate matter is accumulated may be increased. It can be narrowly formed. Accordingly, the response time for changing the capacitance between the capacitor 121b and the capacitor electrode 131 of the second electrode 130 and 230 is shortened after the separation electrodes 121 and 221 are electrically connected to the edge electrode 122. Can be.
- the second electrode parts 130 and 230 may be spaced apart from each other in parallel with the first electrode parts 120 and 220 in the insulating substrate 110.
- the second electrode parts 130 and 230 may include a plurality of capacitor electrodes 131 corresponding to the capacitor part 121b, and the plurality of capacitor electrodes 131 may be the plurality of spaced apart electrodes 121 and 221. ) May be disposed at positions corresponding to each other with the capacitive portion 121b (see FIGS. 2 and 8).
- the plurality of capacitor electrodes 131 may be electrically connected to each other (see FIGS. 4B and 11), and one side of the second electrode parts 130 and 230 may be connected to the insulating substrate 110 through the lead part 132. It extends along the longitudinal direction of the) may be electrically connected to the second electrical connection terminal 162 disposed on one surface of the insulating substrate 110 through the via holes (171, 172, 271) (see FIGS. 2 and 8).
- only one end of the plurality of capacitor electrodes 131 may be electrically connected to each other (see FIG. 4B), and both ends may be electrically connected to each other (see FIG. 11).
- the second electrical connection terminal 162 may be disposed on the same plane as the first electrical connection terminal 161 and the first electrical connection terminal 161 along the width direction of the insulating substrate 110. Can be arranged side by side.
- the second electrode parts 130 and 230 may be disposed inside the insulating substrate 110 as shown in FIGS. 2 and 8, and a plurality of capacitor electrodes 131 are disposed in the separation electrodes 121 and 221. It may be provided so as to have an area corresponding to each of the capacitive portion 121b.
- the plurality of capacitor electrodes 131 may be disposed directly below the capacitor portion 121b so as to correspond to each other with the capacitor portion 121b formed in each of the separation electrodes 121 and 221.
- the plurality of capacitor parts 121b and the plurality of capacitor electrodes 131 may be arranged side by side in the longitudinal direction on the insulating substrate 110, and may be arranged to correspond to each other in the width direction of the insulating substrate 110. have.
- each of the capacitor electrodes 131 may be provided to have approximately the same area as the capacitor portion 121b corresponding to each other (see FIG. 11), and may have the same length as the sum of the capacitor portion 121b and the sensitive portion 121a. It may be provided to have a length (see FIGS. 4A and 4B).
- the plurality of capacitor electrodes 131 may have an area that is at least equal to or larger than that of the corresponding capacitor portion 121b.
- a dielectric layer 160 having a dielectric constant may be disposed between the first electrode portions 120 and 220 and the second electrode portions 130 and 230 disposed in the up and down directions along the height direction of the insulating substrate 110 ( See FIG. 2).
- the dielectric layer 160 may allow the first electrode portions 120 and 220 to achieve smooth capacitance between the capacitor portions 121b of the spaced electrodes 121 and 221 and the capacitor electrodes 131 of the second electrode portions 130 and 230.
- the capacitor 121b may be disposed between the capacitor 121b and the capacitor electrodes 131 of the second electrode 130 and 230, and may be made of a ceramic material.
- first electrode parts 120 and 220 and the second electrode parts 130 and 230 which are applied to the particulate matter sensors 100 and 200 of the present invention are not limited to the above-described structure, but may be changed in various shapes.
- the heater 140 is for heating the sensitive part 121a, and may be disposed inside the insulating substrate 110, and may be disposed to be positioned below the first electrode parts 120 and 220. have. At this time, both ends of the heater unit 140 are electrically connected to each other through the third electrical connection terminal 163, the ground terminal 165, and the via holes 173, 173, 272 and 273 provided on the lower surface of the insulating substrate 110. Can be connected.
- the heater unit 140 heats the sensitive unit 121a, the particulate matter deposited in the deposition space 127 may be removed.
- the heater 140 may be made of a material that does not easily oxidize at a high temperature. This is because the exhaust gas is at a high temperature of about 300 ° C. or more, and a high temperature of about 600 ° C. or more occurs when the heater part 140 is heated, and thus, when a general metal is used as the heater part, it is highly likely to be oxidized by high temperature.
- the sensitive portion 121a and the capacitive portion 121b may be spaced apart from each other by a predetermined interval (see FIG. 9).
- the separation electrode 221 may have a form in which the sensitive portions 121a and the capacitor portions 121b formed at both end sides thereof are connected by a lead portion 121c having a predetermined length.
- the capacitive portion 121b may be spaced apart from the sensitive portion 121a by an interval equal to the entire length of the sensitive portion 121a or corresponding to a longer length than the entire length of the sensitive portion 121a. have.
- the total length L2 of the lead portion 121c has a length substantially equal to the total length L1 of the sensitive portion 121a or longer than the total length of the sensitive portion 121a. It may be provided.
- the capacitive part 121b for measuring the change in capacitance can be maintained at a predetermined distance from the sensitive part 121a exposed to a high temperature environment, a constant capacitance can be realized without being affected by temperature. To make it work.
- the sensitive part 121a plays a role of widening the area where the first electrode part 220 is connected through the particulate matter deposited in the deposition space 127, even when exposed to a high temperature environment. It is not affected.
- the capacitance part 121b for measuring the change in capacitance between the first electrode part 220 and the second electrode part 230 is constant at or below a predetermined temperature depending on the material used for the insulating substrate 110. Although the capacitance is realized, at a high temperature above a predetermined temperature, a change in the dielectric constant occurs rapidly, making it difficult to accurately measure the change in capacitance.
- the insulating substrate 110 is made of a ceramic material
- a sudden change in dielectric constant occurs around 600 ° C. due to the characteristics of the material.
- the capacitance portion 121b is formed at a position adjacent to the sensitive portion 121a, since the capacitance portion 121b is unable to implement a constant capacitance due to the influence of temperature, accurate measurement in a high temperature environment of a predetermined temperature or more. This difficulty causes limitations in use.
- the capacitive portion 121b is spaced apart from the sensitive portion 121a by a predetermined distance through the lead portion 121c, such that a sudden change in dielectric constant due to high temperature is achieved. This prevents constant capacitance even in high temperature environments.
- the temperature of the capacitor part 121b can be maintained at a lower temperature than the temperature of the sensitive part 121a. The wait time for reuse is unnecessary.
- the capacitive part 121b and the lead part 121c may be covered by a separate insulating layer 128 so that the capacitive part 121b and the lead part 121c may be insulated without being exposed to the outside.
- the particulate matter sensor 200 may be further provided with a temperature sensing unit 150 to measure the temperature of the insulating substrate 110 or the sensitive portion 121a ( See FIG. 7).
- the temperature sensing unit 150 may be disposed between the sensitive unit 121a and the heater unit 140 in the insulating substrate 110.
- Both ends of the temperature sensing unit 150 may be electrically connected to the heater 140 and the fourth electrical connection terminal 164 through the via holes 274 and 275, respectively.
- one end of both ends of the temperature sensing unit 150 may be electrically connected to the heater 140 through a via hole 275 connected to the heater 140.
- the other end of the 150 may be electrically connected to the fourth electrical connection terminal 164 formed on the lower surface of the insulating substrate 110 through the via hole 274.
- the fourth electrical connection terminal 164 formed on the lower surface of the insulating substrate 110 is not electrically connected to the third electrical connection terminal 163 and the ground terminal 165.
- control circuit (not shown) of the vehicle compares the measured value of the temperature measured by the temperature sensing unit 150 with the temperature measured by the temperature sensor (not shown) installed in the vehicle to provide the sensitive unit 121a.
- the heater 140 to be heated may be controlled.
- the installation area of the temperature sensing unit 150 may be formed to be the same as or smaller than the area of the heater unit 140 to be located within the installation area of the heater unit 140.
- the particulate matter sensors 100 and 200 having the above-described configuration may be installed at the outlet side exhaust pipe 18a connected to the rear end of the exhaust gas particulate filter 17 of the vehicle, and the sensitive portion 121a may be exhaust gas. Can be mounted to be exposed.
- the particulate matter P1 flowing through the exhaust gas particulate filter (17 in FIG. 12) to the outlet side exhaust pipe 18a is adjacent to the particulate matter sensors 100 and 200 mounted on one side of the outlet side exhaust pipe 18a. Passed by.
- the particulate matter P1 may be deposited on the space 127 formed between the sensitive portion 121a of the spaced apart electrodes 121 and 221 and the extension electrodes 123. .
- the sensitive part 121a and the extension electrode 123 may be electrically connected to each other by the particulate matter deposited in the space 127. Accordingly, the conduction area of the sensitive portion 121a through which electricity flows is widened, and the capacitive portion 121b formed integrally with the sensitive portion 121a is electrically connected to each other so that the spaced apart electrodes 121 and 221 and the second electrode portion ( The capacitance between 130 and 230 is changed.
- the capacitance between the capacitor 121b and the second electrode parts 130 and 230 may be measured by Equation 1 below.
- Equation 1 W is the area of the capacitor 121b of the spaced electrode electrically connected to the edge electrode, and t is the distance between the capacitor 121b and the second electrode 130, 230, so that the first electrode portion ( The capacitance between the 120 and 220 and the second electrode parts 130 and 230 may be measured.
- the second area of the capacitor 121b among the spaced electrodes 121 and 221 may have a larger area than the second area of the sensitive part 121a.
- the particulate matter sensor 100 or 200 has an area in which the capacitance can be measured when one sensitive portion 121a is electrically connected to the edge electrode 122. This corresponds to the area of the capacitor 121b as well as the area. Accordingly, the capacitance between the separation electrodes 121 and 221 and the second electrode portions 130 and 230 may be increased by only connecting the sensitive portion 121a to the edge electrode 122 in the separation electrodes 121 and 221. .
- the area of the capacitor 121b for changing the capacitance between the capacitor electrode 131 is larger than the area of the sensitive part 121a.
- the response time for changing the capacitance between the electrodes 121 and 221 and the capacitive electrode 131 can be shortened, thereby increasing the change in capacitance.
- the area of the sensitive portion 121a is smaller than that of the capacitor 121b, and the sensitive portion 121a is an extension electrode of the edge electrode 122.
- the capacitance between the spaced electrodes 121 and 221 and the capacitive electrodes 130 and 230 is changed because the contact between the sensitive portion 121a and the edge electrode 122 connected by the particulate material is increased by being disposed between the 123.
- the response time taken can be shortened.
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Claims (15)
- 절연기판;상기 절연 기판의 일면에 형성되며, 테두리전극 및 상기 테두리전극에 전기적으로 연결되지 않는 복수 개의 이격전극을 포함하는 제1전극부;상기 절연기판의 내부에 상기 제1전극부와 간격을 두고 이격배치되며, 상기 제1전극부와의 정전용량을 측정할 수 있도록 서로 전기적으로 연결된 복수 개의 용량전극을 포함하는 제2전극부; 및상기 절연기판의 내부에 배치되어 상기 감응부에 퇴적된 입자상 물질을 제거하기 위한 열을 제공하는 히터부;를 포함하고,상기 이격전극은 입자상 물질이 퇴적되는 감응부와, 정전용량을 측정하기 위한 용량부를 포함하며,입자상 물질의 퇴적시 상기 이격전극과 테두리전극이 서로 전기적으로 연결되어 상기 제1전극부와 제2전극부 사이의 정전 용량을 측정하는 입자상 물질 센서.
- 제 1항에 있어서,상기 제1전극부는 상기 복수 개의 이격전극을 둘러싸도록 배치되는 테두리전극 및 상기 테두리전극으로부터 일방향으로 평행하게 연장되는 복수 개의 연장전극을 포함하며,상기 각각의 이격전극은 서로 이웃하는 한 쌍의 연장전극 사이 또는 서로 이웃하는 연장전극과 테두리전극 사이에 상기 감응부가 배치되는 입자상 물질 센서.
- 제 2항에 있어서,상기 테두리전극은 상기 복수 개의 연장전극의 단부가 연결되는 제1연결전극 및 상기 제1연결전극의 양단부로부터 상기 연장전극과 평행하게 연장되는 제2연결전극을 포함하는 입자상 물질 센서.
- 제 2항에 있어서,서로 이웃하게 배치되는 연장전극 사이의 간격은 서로 동일하게 형성되는 입자상 물질 센서.
- 제 1항에 있어서,상기 감응부 및 용량부는 소정의 면적을 갖도록 형성되고, 상기 용량부의 제2면적은 상기 감응부의 제1면적보다 상대적으로 넓은 면적을 갖는 입자상 물질 센서.
- 제 5항에 있어서,상기 용량부의 제2면적은 상기 감응부의 제1면적의 2배 이상인 입자상 물질 센서.
- 제 1항에 있어서,상기 감응부 및 용량부는 소정의 길이를 갖는 리드부를 매개로 서로 이격배치되는 입자상 물질 센서.
- 제 7항에 있어서,상기 감응부 및 용량부를 연결하는 리드부의 전체길이는 상기 감응부의 전체길이와 동일하거나 더 긴 길이를 갖도록 형성되는 입자상 물질 센서.
- 제 1항에 있어서,상기 용량전극은 상기 용량부와 대응되는 면적을 갖는 입자상 물질 센서.
- 제 1항에 있어서,상기 감응부의 전체면적은 상기 용량부의 전체면적보다 좁은 면적을 갖도록 형성되는 입자상 물질 센서.
- 제 1 항에 있어서,상기 제1전극부 및 상기 제2전극부 사이에는 유전층이 배치되는 입자상 물질 센서.
- 제 1항에 있어서,상기 제2전극부와 상기 히터부 사이에 배치되어 상기 히터부를 제어하는 온도 감지부를 더 포함하는 입자상 물질 센서.
- 제 1항에 있어서,상기 절연기판은 알루미나 또는 ZTA인 입자상 물질 센서.
- 제 7항에 있어서,상기 입자상 물질 센서는 차량의 배기가스 미립자 필터의 후단에 연결되는 배기관 측에 상기 감응부가 노출되도록 장착되는 입자상 물질 센서.
- 배기 매니폴드;상기 배기 매니폴드에서 배출되는 배기가스에 포함된 미립자들을 제거하기 위한 배기가스 미립자 필터; 및상기 배기가스 미립자 필터를 통과하여 하류 측으로 빠져나가는 입자상 물질을 검출할 수 있도록 상기 배기가스 미립자 필터에 연결되는 유출측 배기관에 설치되는 청구항 제 1항 내지 제 14항 중 어느 한 항에 기재된 입자상 물질 센서;를 포함하는 배기가스 정화 시스템.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201680032968.XA CN107709967B (zh) | 2015-06-09 | 2016-06-08 | 粒子状物质传感器及包括其的废气净化系统 |
| US15/735,162 US10801389B2 (en) | 2015-06-09 | 2016-06-08 | Particulate matter sensor and exhaust gas purification system having the same |
| JP2017564536A JP6466002B2 (ja) | 2015-06-09 | 2016-06-08 | 粒子状物質センサ及びこれを含む排気ガス浄化システム |
| DE112016002629.3T DE112016002629B4 (de) | 2015-06-09 | 2016-06-08 | Partikelsensor und Abgasreinigungssystem mit demselben |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150081397A KR101683467B1 (ko) | 2015-06-09 | 2015-06-09 | 입자상 물질 센서 및 그를 이용한 배기가스 정화 시스템 |
| KR10-2015-0081397 | 2015-06-09 | ||
| KR10-2016-0039712 | 2016-03-31 | ||
| KR1020160039712A KR101991265B1 (ko) | 2016-03-31 | 2016-03-31 | 입자상 물질 센서 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016200132A1 true WO2016200132A1 (ko) | 2016-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2016/006044 Ceased WO2016200132A1 (ko) | 2015-06-09 | 2016-06-08 | 입자상 물질 센서 및 이를 포함하는 배기가스 정화 시스템 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10801389B2 (ko) |
| JP (1) | JP6466002B2 (ko) |
| CN (1) | CN107709967B (ko) |
| DE (1) | DE112016002629B4 (ko) |
| WO (1) | WO2016200132A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD953183S1 (en) | 2019-11-01 | 2022-05-31 | Nvent Services Gmbh | Fuel sensor |
| WO2022144829A1 (ko) * | 2020-12-30 | 2022-07-07 | 주식회사 헬릭스랩 | 반도체 제조 장비 배관용 커패시턴스 센서 |
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| US20090217737A1 (en) * | 2005-11-08 | 2009-09-03 | Robert Bosch Gmbh | Sensor Element for Gas Sensors and Method for Operating Same |
| JP2010190615A (ja) * | 2009-02-16 | 2010-09-02 | Honda Motor Co Ltd | 粒子状物質検出装置 |
| JP2012037373A (ja) * | 2010-08-06 | 2012-02-23 | Denso Corp | センサ制御装置 |
| JP2012127907A (ja) * | 2010-12-17 | 2012-07-05 | Nippon Soken Inc | 粒子状物質検出センサ |
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| US6634210B1 (en) * | 2002-04-17 | 2003-10-21 | Delphi Technologies, Inc. | Particulate sensor system |
| DE10353860B4 (de) * | 2003-11-18 | 2023-03-30 | Robert Bosch Gmbh | Sensor zum Erfassen von Partikeln in einem Gasstrom, sowie Verfahren zu seiner Herstellung |
| KR20060076922A (ko) * | 2004-12-29 | 2006-07-05 | 엘지전자 주식회사 | 박막 가스 센서 및 그 제조 방법 |
| JP3897798B2 (ja) * | 2005-06-08 | 2007-03-28 | 日新電機株式会社 | 排ガス浄化方法及び排ガス浄化装置 |
| US8225640B2 (en) * | 2008-12-11 | 2012-07-24 | Delphi Technologies, Inc. | Soot sensor and method for sensing soot |
| JP2011089791A (ja) | 2009-10-20 | 2011-05-06 | Honda Motor Co Ltd | 粒子状物質検出装置 |
| JP2012012960A (ja) | 2010-06-29 | 2012-01-19 | Nippon Soken Inc | 粒子状物質検出センサ |
| JP5240679B2 (ja) | 2011-01-20 | 2013-07-17 | 株式会社デンソー | 検出装置 |
| JP5874195B2 (ja) * | 2011-05-20 | 2016-03-02 | いすゞ自動車株式会社 | 粒子状物質センサ |
| JP5864368B2 (ja) * | 2012-06-22 | 2016-02-17 | 株式会社日本自動車部品総合研究所 | 粒子状物質検出素子並びにその製造方法 |
| KR101593670B1 (ko) | 2014-10-17 | 2016-02-17 | 주식회사 아모텍 | 입자상 물질 센서 및 그를 이용한 배기가스 정화 시스템 |
-
2016
- 2016-06-08 WO PCT/KR2016/006044 patent/WO2016200132A1/ko not_active Ceased
- 2016-06-08 JP JP2017564536A patent/JP6466002B2/ja active Active
- 2016-06-08 CN CN201680032968.XA patent/CN107709967B/zh active Active
- 2016-06-08 DE DE112016002629.3T patent/DE112016002629B4/de active Active
- 2016-06-08 US US15/735,162 patent/US10801389B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090217737A1 (en) * | 2005-11-08 | 2009-09-03 | Robert Bosch Gmbh | Sensor Element for Gas Sensors and Method for Operating Same |
| JP2010190615A (ja) * | 2009-02-16 | 2010-09-02 | Honda Motor Co Ltd | 粒子状物質検出装置 |
| JP2012037373A (ja) * | 2010-08-06 | 2012-02-23 | Denso Corp | センサ制御装置 |
| JP2012127907A (ja) * | 2010-12-17 | 2012-07-05 | Nippon Soken Inc | 粒子状物質検出センサ |
| JP2013231627A (ja) * | 2012-04-27 | 2013-11-14 | Nippon Soken Inc | 粒子状物質検出素子とその製造方法、並びに、粒子状物質検出センサ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107709967A (zh) | 2018-02-16 |
| US20180355779A1 (en) | 2018-12-13 |
| DE112016002629B4 (de) | 2020-10-08 |
| JP6466002B2 (ja) | 2019-02-06 |
| DE112016002629T5 (de) | 2018-02-22 |
| CN107709967B (zh) | 2021-04-27 |
| JP2018525608A (ja) | 2018-09-06 |
| US10801389B2 (en) | 2020-10-13 |
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