WO2012124091A1 - 粒子状物質処理装置 - Google Patents
粒子状物質処理装置 Download PDFInfo
- Publication number
- WO2012124091A1 WO2012124091A1 PCT/JP2011/056300 JP2011056300W WO2012124091A1 WO 2012124091 A1 WO2012124091 A1 WO 2012124091A1 JP 2011056300 W JP2011056300 W JP 2011056300W WO 2012124091 A1 WO2012124091 A1 WO 2012124091A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- current
- fuel ratio
- air
- amount
- Prior art date
Links
- 239000013618 particulate matter Substances 0.000 title claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 55
- 230000002776 aggregation Effects 0.000 claims abstract description 44
- 238000004220 aggregation Methods 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims description 11
- 239000002245 particle Substances 0.000 description 26
- 239000012212 insulator Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 108091006149 Electron carriers Proteins 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- 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
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
- B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
-
- 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, e.g. for catalytic activity
-
- 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, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating parameters, efficiency, etc.
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
-
- 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
-
- 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
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
-
- 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
-
- 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 processing apparatus.
- a technique in which a discharge electrode is provided in an exhaust passage of an internal combustion engine, and corona discharge is generated from the discharge electrode to charge the PM and aggregate the PM (for example, see Patent Document 2).
- a discharge electrode is provided in an exhaust passage of an internal combustion engine, and corona discharge is generated from the discharge electrode to charge the PM and aggregate the PM (for example, see Patent Document 2).
- the number of PM particles can be reduced.
- the particle diameter of PM becomes large, when a filter is provided on the downstream side, PM is easily collected by the filter.
- the current passing through the electrode may be the amount of decrease in the number of PM particles. That is, the greater the amount of PM aggregation, the greater the current through the electrode. For this reason, the amount of PM aggregation can be estimated from the current passing through the electrode.
- electricity also flows through substances other than PM contained in the exhaust. Therefore, if the amount of PM aggregation is estimated based on the current passing through the electrode, there is a possibility that the estimation accuracy is lowered due to substances other than PM contained in the exhaust gas.
- the present invention has been made in view of the above-described problems, and an object thereof is to estimate the amount of PM aggregation with high accuracy.
- the particulate matter processing apparatus is: In the particulate matter processing apparatus that comprises a processing unit in which an electrode is installed in an exhaust passage of an internal combustion engine, and aggregates PM by causing a potential difference between the electrode and the processing unit A power source connected to the electrode for applying a voltage; A current detection device for detecting a current passing through the electrode; An estimation device that estimates an amount of aggregation of PM based on a current detected by the current detection device when a voltage is applied to the electrode by the power source; An air-fuel ratio detection device for detecting or estimating an air-fuel ratio of the exhaust flowing in the exhaust passage; When the air-fuel ratio detected or estimated by the air-fuel ratio detection device is a rich air-fuel ratio, a prohibition device that prohibits estimation by the estimation device; Is provided.
- PM when voltage is applied to the electrode, PM can be charged.
- the charged PM moves toward the inner wall of the processing unit due to the Coulomb force or the flow of exhaust. Since PM that has reached the inner wall of the processing unit emits electrons to the processing unit, electricity flows to the ground side from the electrode. And since PM which emitted the electron aggregates with other PM which exists near, the number of particles can be decreased.
- the PM aggregation amount can be estimated based on the detection current. If the amount of PM aggregation can be estimated, for example, the applied voltage can be controlled to promote PM aggregation.
- the aggregation amount of the PM may be the amount of the PM that has emitted the electrons. Moreover, it is good also as the reduction
- the unburned fuel or the like becomes a carrier, so that current flows through the unburned fuel when a voltage is applied to the electrode.
- This current is detected by a current detection device.
- the air-fuel ratio of the exhaust gas is a rich air-fuel ratio, a large amount of unburned fuel is contained in the exhaust gas, so that the current detected by the current detection device becomes very large.
- the current detected by the current detection device becomes large, so that it is difficult to estimate the amount of PM aggregation. Therefore, when the air-fuel ratio of the exhaust is a rich air-fuel ratio, estimation by the estimation device is prohibited. Thereby, it can suppress that the estimation precision falls about the amount of PM aggregation. Therefore, for example, the voltage applied to the electrodes can be optimized.
- an insulating portion that insulates electricity between the processing portion and the exhaust passage;
- a grounding unit for grounding the processing unit;
- the current detection device can detect a current at the grounding unit.
- the current detection device detects a current on the potential reference point side of the electrode.
- the wiring is longer or thicker than the electrode on the ground side.
- charges may be stored on the power supply side of the electrode. Then, if a current is detected on the power supply side with respect to the electrode, even if a strong discharge occurs in the electrode, the current detected by the current detection device rises and falls slowly.
- the wiring can be made relatively short and thin. For this reason, an electric current can be detected more correctly. Moreover, it can suppress that electricity flows other than a grounding part by providing an insulating part. For this reason, an electric current can be detected more correctly.
- the estimation device can estimate that the larger the current detected by the current detection device, the more the amount of PM aggregation.
- the PM aggregation amount is correlated with the detection current, it can be estimated that the PM aggregation amount increases as the detected current increases.
- the air-fuel ratio of the exhaust gas becomes a rich air-fuel ratio, the current increases due to the influence of unburned fuel.
- the amount of PM aggregation is estimated to be large although the amount of PM aggregation is small.
- the estimation accuracy can be improved by prohibiting estimation by the estimation device.
- the amount of PM aggregation can be estimated with high accuracy.
- FIG. 1 is a diagram illustrating a schematic configuration of a particulate matter processing apparatus 1 according to the present embodiment.
- the particulate matter processing apparatus 1 is provided in an exhaust passage 2 of a spark ignition type gasoline engine.
- the particulate matter treatment apparatus 1 includes a housing 3 whose both ends are connected to an exhaust passage 2.
- the material of the housing 3 is a stainless steel material.
- the housing 3 is formed in a hollow cylindrical shape having a diameter larger than that of the exhaust passage 2. Both ends of the housing 3 are formed in a tapered shape in which the cross-sectional area decreases as the distance from the end increases. In FIG. 1, the exhaust flows through the exhaust passage 2 in the direction of the arrow and flows into the housing 3. For this reason, the housing 3 may be a part of the exhaust passage 2.
- the exhaust passage 2 and the housing 3 are connected via an insulating portion 4.
- the insulating part 4 is made of an electrical insulator.
- the insulating portion 4 is sandwiched between a flange 21 formed at the end of the exhaust passage 2 and a flange 31 formed at the end of the housing 3.
- the exhaust passage 2 and the housing 3 are fastened by bolts and nuts, for example.
- these bolts and nuts are also insulated so that electricity does not flow through these bolts and nuts. In this way, electricity is prevented from flowing between the exhaust passage 2 and the housing 3.
- An electrode 5 is attached to the housing 3.
- the electrode 5 penetrates the side surface of the housing 3, extends from the side surface of the housing 3 toward the central axis of the housing 3, bends in the vicinity of the central axis, and upstream of the flow of exhaust gas, and is parallel to the central axis It extends toward the upstream side of the exhaust flow. Further, it bends further to the side surface side of the housing 3 on the upstream side, passes through the side surface of the housing 3 and communicates with the outside.
- the insulator 5 and 55 which consist of an electrical insulator are provided in the electrode 5 so that electricity may not flow between the electrode 5 and the housing 3.
- the insulator portions 51 and 55 are located between the electrode 5 and the housing 3, and have a function of insulating electricity and fixing the electrode 5 to the housing 3.
- the electrode 5 is connected to the power source 6 via the power source side electric wire 52.
- the power source 6 can energize the electrode 5 and change the applied voltage.
- the power source 6 is connected to the control device 7 and the battery 8 through electric wires.
- the control device 7 controls the voltage that the power source 6 applies to the electrode 5.
- the power supply 6 is connected to a ground wire 54 for connection to a potential reference point.
- the power source 6 is grounded by the ground wire 54.
- the other end of the electrode 5 is connected to the ground wire 54 through a short-circuit wire 56.
- a switch 57 for opening and closing the circuit is provided in the middle of the short-circuit wire 56.
- the switch 57 is turned on while a voltage is applied by the power source 6, electricity flows through the short-circuited wire 56.
- the temperature of the electrode 5 rises.
- the power supply side electric wire 52 is connected to the downstream side insulator 51 and the short-circuited wire 56 is connected to the upstream side insulator 55, but instead, the downstream side insulator 51 is connected.
- the short-circuited wire 56 may be connected to the power supply side electric wire 52 and the upstream side insulator portion 55 may be connected.
- a ground side electric wire 53 is connected to the housing 3, and the housing 3 is grounded via the ground side electric wire 53.
- the ground side electric wire 53 is provided with a detection device 9 that detects a current passing through the ground side electric wire 53.
- the detection device 9 detects a current by measuring a potential difference between both ends of a resistor provided in the middle of the ground-side electric wire 53.
- the detection device 9 is connected to the control device 7 via an electric wire. Then, the current detected by the detection device 9 is input to the control device 7.
- the detection device 9 corresponds to the current detection device in the present invention.
- Accelerator opening sensor 71, crank position sensor 72, temperature sensor 73, air flow meter 74, and air-fuel ratio sensor 75 are connected to control device 7.
- the accelerator opening sensor 71 outputs an electrical signal corresponding to the amount of depression of the accelerator pedal by the driver of the vehicle on which the internal combustion engine is mounted, and detects the engine load.
- the crank position sensor 72 detects the engine speed.
- the temperature sensor 73 detects the temperature of the internal combustion engine by detecting the temperature of the cooling water of the internal combustion engine or the temperature of the lubricating oil.
- the air flow meter 74 detects the intake air amount of the internal combustion engine.
- the air-fuel ratio sensor 75 is attached to the exhaust passage 2 upstream of the housing 3 and detects the air-fuel ratio of the exhaust flowing through the exhaust passage 2. In this embodiment, the air-fuel ratio sensor 75 corresponds to the air-fuel ratio detection device in the present invention. Further, the air-fuel ratio of the exhaust gas may be estimated from the operating state of the internal combustion engine.
- a switch 57 is connected to the control device 7 via an electric wire, and the control device 7 performs ON / OFF operation of the switch 57.
- the control device 7 performs ON / OFF operation of the switch 57.
- electrons are emitted from the electrode 5 by applying a negative DC high voltage from the power source 6 to the electrode 5 when the switch 57 is OFF. That is, electrons are emitted from the electrode 5 by making the potential of the electrode 5 lower than that of the housing 3.
- the electrons in the exhaust gas can be negatively charged by the electrons. Negatively charged PM moves due to Coulomb force and gas flow. When the PM reaches the housing 3, the electrons that have negatively charged the PM are emitted to the housing 3.
- the PM that has released electrons to the housing 3 aggregates to increase the particle size.
- the number of PM particles is reduced due to aggregation of PM. That is, by applying a voltage to the electrode 5, the particle diameter of PM can be increased and the number of PM particles can be reduced.
- the amount of PM aggregation is correlated with the number of electrons emitted from the PM to the housing 3. Therefore, if the relationship between the detection current and the amount of PM aggregation is obtained in advance through experiments or the like, the amount of PM aggregation can be estimated based on the detection current. Note that it is estimated that the larger the detected current, the greater the amount of PM aggregation. Then, it is possible to determine whether or not the applied voltage is appropriate by estimating the PM aggregation amount. Further, the applied voltage can be controlled based on the PM aggregation amount.
- the estimation accuracy of the PM aggregation amount may be lowered. That is, when the detected current increases due to an increase in unburned fuel, it may be estimated that the amount of PM aggregation has increased.
- the estimation of the PM aggregation amount is prohibited. Note that control based on the amount of PM aggregation may be prohibited.
- the insulating portion 4 since the insulating portion 4 is provided, it is possible to prevent electricity from passing through the exhaust passage 2. Therefore, the current passing through the housing 3 via the deposits on the electrode 5, the PM floating in the exhaust, and the unburned fuel is detected by the detection device 9. Further, by detecting the current in the ground side electric wire 53, the current detection accuracy can be increased. In general, the power supply side electric wire 52 is longer or thicker than the ground side electric wire 53. Then, if a current is detected in the power supply side electric wire 52, the rise and fall of the detected current with respect to the actual current change becomes slow. For this reason, there exists a possibility that the detection accuracy of an electric current may become low.
- the wiring can be made relatively short and thin. For this reason, the response to the actual change in current is higher when the current is detected in the ground-side electric wire 53. Therefore, the current can be detected more accurately by detecting the current in the ground side electric wire 53.
- FIG. 2 is a flowchart showing a flow for estimating the amount of PM aggregation according to the present embodiment. This routine is repeatedly executed by the control device 7 every predetermined time.
- step S101 the operating state of the internal combustion engine is acquired. For example, values necessary for subsequent processing such as engine speed, engine load, and exhaust air-fuel ratio are read.
- the engine speed is detected by a crank position sensor 72, and the engine load is detected by an accelerator opening sensor 71.
- the air-fuel ratio of the exhaust is detected by an air-fuel ratio sensor 75.
- the air-fuel ratio of the exhaust gas can also be estimated from the engine speed, the engine load, the temperature of the internal combustion engine, and the like.
- the temperature sensor 73 detects the temperature of the internal combustion engine (for example, the temperature of the lubricating oil or the temperature of the cooling water).
- step S102 the voltage applied to the electrode 5 is calculated.
- the applied voltage is set according to the estimated number of PM particles (number / cm 3 ).
- the number of PM particles is the number of PM particles discharged from the internal combustion engine, and is the number of PM particles before flowing into the housing 3. Since the number of PM particles is correlated with the engine speed, the engine load, and the temperature of the internal combustion engine (for example, the temperature of the lubricating oil or the temperature of the cooling water), the number of PM particles is calculated based on these values.
- a plurality of maps for calculating the number of PM particles may be stored according to the temperature of the internal combustion engine from the engine speed and the engine load, and the number of PM particles may be calculated based on the map.
- a sensor for detecting the number of PM particles may be attached to the exhaust passage 2 upstream of the housing 3, and the number of PM particles may be detected by the sensor.
- the applied voltage is calculated based on the number of PM particles and the exhaust gas amount (g / sec) of the internal combustion engine. This relationship may be obtained in advance by experiments or the like and mapped. Since the exhaust gas amount of the internal combustion engine has a correlation with the intake air amount of the internal combustion engine, it can be obtained based on the intake air amount detected by the air flow meter 74.
- the applied voltage may be a value such that the reduction rate of the number of PM particles becomes a predetermined value (for example, 40%).
- the applied voltage may be a predetermined value that is determined in advance.
- step S103 the current is detected. This current is a value detected by the detection device 9.
- step S104 it is determined whether the air-fuel ratio of the exhaust gas acquired in step S101 is a rich air-fuel ratio. In this step, it is determined whether or not the exhaust gas contains a large amount of unburned fuel.
- step S104 If an affirmative determination is made in step S104, the process proceeds to step S105, and if a negative determination is made, the process proceeds to step S106.
- step S105 estimation of the amount of PM aggregation is prohibited. That is, the estimation is prohibited because an accurate determination cannot be made due to the influence of unburned fuel.
- the control device 7 that processes step S105 corresponds to the prohibition device in the present invention.
- step S106 estimation of the amount of PM aggregation is permitted. Then, the PM aggregation amount is estimated based on the detected current, and the applied voltage is controlled as necessary.
- the control device 7 that processes step S106 corresponds to the estimation device according to the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electrochemistry (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
電極が設置される処理部を内燃機関の排気通路に備え、電極と処理部とに電位差を生じさせることでPMを凝集させる粒子状物質処理装置において、
前記電極に接続され電圧を印加する電源と、
前記電極を通る電流を検出する電流検出装置と、
前記電源により前記電極に電圧を印加したときに前記電流検出装置により検出される電流に基づいてPMの凝集量を推定する推定装置と、
前記排気通路流れる排気の空燃比を検出または推定する空燃比検出装置と、
前記空燃比検出装置により検出または推定される空燃比がリッチ空燃比の場合には、前記推定装置による推定を禁止する禁止装置と、
を備える。
前記処理部を接地させる接地部と、
を備え、
前記電流検出装置は、前記接地部にて電流を検出することができる。
図1は、本実施例に係る粒子状物質処理装置1の概略構成を示す図である。粒子状物質処理装置1は、火花点火式のガソリン機関の排気通路2に設けられる。
2 排気通路
3 ハウジング
4 絶縁部
5 電極
6 電源
7 制御装置
8 バッテリ
9 検出装置
21 フランジ
31 フランジ
51 碍子部
52 電源側電線
53 接地側電線
54 接地電線
55 碍子部
56 短絡電線
57 スイッチ
71 アクセル開度センサ
72 クランクポジションセンサ
73 温度センサ
74 エアフローメータ
75 空燃比センサ
Claims (3)
- 電極が設置される処理部を内燃機関の排気通路に備え、電極と処理部とに電位差を生じさせることでPMを凝集させる粒子状物質処理装置において、
前記電極に接続され電圧を印加する電源と、
前記電極を通る電流を検出する電流検出装置と、
前記電源により前記電極に電圧を印加したときに前記電流検出装置により検出される電流に基づいてPMの凝集量を推定する推定装置と、
前記排気通路流れる排気の空燃比を検出または推定する空燃比検出装置と、
前記空燃比検出装置により検出または推定される空燃比がリッチ空燃比の場合には、前記推定装置による推定を禁止する禁止装置と、
を備える粒子状物質処理装置。 - 前記処理部と前記排気通路との間で電気を絶縁する絶縁部と、
前記処理部を接地させる接地部と、
を備え、
前記電流検出装置は、前記接地部にて電流を検出する請求項1に記載の粒子状物質処理装置。 - 前記推定装置は、前記電流検出装置により検出される電流が大きいほど、PMの凝集量が多いと推定する請求項1または2に記載の粒子状物質処理装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/056300 WO2012124091A1 (ja) | 2011-03-16 | 2011-03-16 | 粒子状物質処理装置 |
JP2012528583A JP5333675B2 (ja) | 2011-03-16 | 2011-03-16 | 粒子状物質処理装置 |
EP11849895.5A EP2687687B8 (en) | 2011-03-16 | 2011-03-16 | Particulate matter processing apparatus |
US13/519,021 US9128026B2 (en) | 2011-03-16 | 2011-03-16 | Particulate matter processing apparatus |
CN201180005065.XA CN103443411B (zh) | 2011-03-16 | 2011-03-16 | 粒子状物质处理装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/056300 WO2012124091A1 (ja) | 2011-03-16 | 2011-03-16 | 粒子状物質処理装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012124091A1 true WO2012124091A1 (ja) | 2012-09-20 |
Family
ID=46830219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/056300 WO2012124091A1 (ja) | 2011-03-16 | 2011-03-16 | 粒子状物質処理装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9128026B2 (ja) |
EP (1) | EP2687687B8 (ja) |
JP (1) | JP5333675B2 (ja) |
CN (1) | CN103443411B (ja) |
WO (1) | WO2012124091A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012193696A (ja) * | 2011-03-17 | 2012-10-11 | Toyota Motor Corp | 粒子状物質処理装置 |
JP2019122940A (ja) * | 2018-01-18 | 2019-07-25 | トヨタ自動車株式会社 | 電気集塵装置 |
CN112594881A (zh) * | 2020-12-11 | 2021-04-02 | 珠海格力电器股份有限公司 | 控制空气净化器的方法及装置、处理器、电子装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012124090A1 (ja) * | 2011-03-16 | 2012-09-20 | トヨタ自動車株式会社 | 粒子状物質処理装置 |
JP5655652B2 (ja) * | 2011-03-17 | 2015-01-21 | トヨタ自動車株式会社 | 粒子状物質処理装置 |
JP6228018B2 (ja) * | 2014-01-10 | 2017-11-08 | 株式会社Soken | 粒子状物質検出素子、粒子状物質検出センサ並びに粒子状物質検出素子の製造方法 |
JP2016090439A (ja) * | 2014-11-06 | 2016-05-23 | 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及び粒子状物質検出センサ |
JP6425993B2 (ja) * | 2014-12-23 | 2018-11-21 | 株式会社Soken | 粒子状物質検出素子 |
CN111068451B (zh) * | 2019-12-13 | 2023-07-14 | 华电电力科学研究院有限公司 | 一种温湿调控细颗粒物高效脱除的装置及方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006046281A (ja) * | 2004-08-09 | 2006-02-16 | Denso Corp | 内燃機関の排気微粒子検出装置 |
JP2006105081A (ja) | 2004-10-08 | 2006-04-20 | Denso Corp | 排気浄化装置 |
JP2006194116A (ja) | 2005-01-12 | 2006-07-27 | Denso Corp | 内燃機関排気浄化装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3794909A (en) * | 1971-12-08 | 1974-02-26 | Ikor Inc | Apparatus for and method of sensing particulate matter |
JPS60171447A (ja) * | 1984-02-17 | 1985-09-04 | Hitachi Ltd | 空燃比検出方法 |
CN85106165B (zh) * | 1985-08-15 | 1988-06-15 | 株式会社日立制作所 | 探测空-燃比的装置和方法 |
JP4276474B2 (ja) * | 2003-06-04 | 2009-06-10 | 日野自動車株式会社 | 排気浄化装置 |
JP2008019853A (ja) * | 2006-06-16 | 2008-01-31 | Denso Corp | 内燃機関の排気処理装置 |
JP4645563B2 (ja) * | 2006-09-12 | 2011-03-09 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム |
US20080105567A1 (en) * | 2006-11-08 | 2008-05-08 | Honda Motor Co., Ltd. | Sensing device and method |
JP4973992B2 (ja) * | 2007-07-11 | 2012-07-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2009030567A (ja) * | 2007-07-30 | 2009-02-12 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP5760547B2 (ja) * | 2011-03-17 | 2015-08-12 | トヨタ自動車株式会社 | 粒子状物質処理装置 |
JP5655652B2 (ja) * | 2011-03-17 | 2015-01-21 | トヨタ自動車株式会社 | 粒子状物質処理装置 |
-
2011
- 2011-03-16 US US13/519,021 patent/US9128026B2/en not_active Expired - Fee Related
- 2011-03-16 CN CN201180005065.XA patent/CN103443411B/zh not_active Expired - Fee Related
- 2011-03-16 JP JP2012528583A patent/JP5333675B2/ja not_active Expired - Fee Related
- 2011-03-16 WO PCT/JP2011/056300 patent/WO2012124091A1/ja active Application Filing
- 2011-03-16 EP EP11849895.5A patent/EP2687687B8/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006046281A (ja) * | 2004-08-09 | 2006-02-16 | Denso Corp | 内燃機関の排気微粒子検出装置 |
JP2006105081A (ja) | 2004-10-08 | 2006-04-20 | Denso Corp | 排気浄化装置 |
JP2006194116A (ja) | 2005-01-12 | 2006-07-27 | Denso Corp | 内燃機関排気浄化装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2687687A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012193696A (ja) * | 2011-03-17 | 2012-10-11 | Toyota Motor Corp | 粒子状物質処理装置 |
JP2019122940A (ja) * | 2018-01-18 | 2019-07-25 | トヨタ自動車株式会社 | 電気集塵装置 |
US11459922B2 (en) | 2018-01-18 | 2022-10-04 | Toyota Jidosha Kabushiki Kaisha | Electric dust collecting apparatus |
CN112594881A (zh) * | 2020-12-11 | 2021-04-02 | 珠海格力电器股份有限公司 | 控制空气净化器的方法及装置、处理器、电子装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2687687A4 (en) | 2014-12-17 |
EP2687687B8 (en) | 2017-09-13 |
US9128026B2 (en) | 2015-09-08 |
EP2687687A1 (en) | 2014-01-22 |
JP5333675B2 (ja) | 2013-11-06 |
EP2687687B1 (en) | 2016-11-16 |
CN103443411A (zh) | 2013-12-11 |
US20140007650A1 (en) | 2014-01-09 |
CN103443411B (zh) | 2015-11-25 |
JPWO2012124091A1 (ja) | 2014-07-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5333675B2 (ja) | 粒子状物質処理装置 | |
JP5590216B2 (ja) | 粒子状物質処理装置 | |
JP5477326B2 (ja) | 粒子状物質処理装置 | |
US9284869B2 (en) | Particulate matter processing apparatus | |
JP5691760B2 (ja) | 粒子状物質処理装置 | |
WO2012124088A1 (ja) | 粒子状物質処理装置 | |
JP5655652B2 (ja) | 粒子状物質処理装置 | |
JP5760547B2 (ja) | 粒子状物質処理装置 | |
JP2012219770A (ja) | 粒子状物質処理装置 | |
JP5590217B2 (ja) | 粒子状物質処理装置 | |
JP5796314B2 (ja) | 粒子状物質処理装置 | |
JP2012219733A (ja) | 粒子状物質処理装置 | |
JP2012219677A (ja) | 粒子状物質処理装置 | |
JP2012219674A (ja) | 粒子状物質処理装置 | |
JP5760548B2 (ja) | 粒子状物質処理装置 | |
JP2012219679A (ja) | 粒子状物質処理装置 | |
JP2012219669A (ja) | 粒子状物質処理装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2012528583 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13519021 Country of ref document: US |
|
REEP | Request for entry into the european phase |
Ref document number: 2011849895 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011849895 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11849895 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |