CN105298608A - Diagnostic method and device for particulate matter discharging for novel external automotive diesel engine - Google Patents
Diagnostic method and device for particulate matter discharging for novel external automotive diesel engine Download PDFInfo
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- CN105298608A CN105298608A CN201510818430.9A CN201510818430A CN105298608A CN 105298608 A CN105298608 A CN 105298608A CN 201510818430 A CN201510818430 A CN 201510818430A CN 105298608 A CN105298608 A CN 105298608A
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- diesel engine
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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
- 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
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Abstract
The invention discloses a diagnostic method and device for particulate matter discharging for a novel external automotive diesel engine. The device comprises a control unit (DCU) and a sensor unit connected with the DCU. The sensor unit is used for collecting current values and comprises an ionization electrode and a signal electrode. The ionization electrode is partly wrapped with a high-temperature-resistant insulating ceramic tube. The high-temperature-resistant insulating ceramic tube is partly wrapped with insulating seal gum and is partly wrapped with a common insulating ceramic tube. An ionization area is formed by the common ceramic tube, the ionization electrode and a grounding shielding shell. The ionization area is communicated with a sampling channel through an inlet of the ionization area and is communicated with the atmosphere through a hole communicated with the atmosphere, and the sampling channel is communicated with an exhaust pipe through an exhaust sampling opening. According to the diagnostic method and device for particulate matter discharging for the novel external automotive diesel engine, the influences of the severe environment in the exhaust pipe of the diesel engine are avoided, the structure is simple, precision is high, the measuring range is large, and particulate discharging can be effectively diagnosed and measured.
Description
Technical field
The present invention relates to the granular material discharged pollution control technology field of diesel motor exhaust, particularly relate to the granular material discharged diagnostic method of a kind of Novel external diesel engine for automobile and device.
Background technique
Diesel engine has the features such as excellent power performance and the economy performance because of it and is used widely, but its tail gas pollution problem caused is day by day serious.The major pollutants of diesel emission have 2 kinds: nitrogen oxide (NOX) and particulate matter (PM).The particulate matter of diesel emission is the significant contributor of Particulate Pollution thing in atmosphere environment.Not only cause atmospheric pollution, but also because carcinogen can be sucked in a large number, health is worked the mischief.For this reason, various countries have all formulated strict Abgasgesetz, to limit the discharge of particulate matter.
At present, for the discharge of reduction diesel particulate, two kinds of modes are had: emission controls by improving combustion and external purification.Emission controls by improving combustion is the discharge realizing reducing diesel particulate by technology such as adjustment oil injection time, multi-injection etc. in engine combustion process; External purification utilizes the diesel particulate catcher (DieselParticulateFilter, DPF) be connected on outlet pipe to collect the particulate matter in being vented.No matter be emission controls by improving combustion or external purification (DPF after-treatment system), all need the granular material discharged numerical value of Diagnosis of Diesel whether to reach the emission standard of respective stage.
At present, the granular material discharged diagnostic form of research both at home and abroad has: electrochemical method, particulate matter thermophoresis characteristic and resistance characteristic, particulate matter optical characteristics etc.And the sampling of all devices and measure portion are all be directly installed in outlet pipe substantially, innerly usually adopt Venturi principle to form gas-particle flow to move.But the actual environment of Diesel Engine Exhaust Pipe is that temperature is high, flow velocity large, particle size tiny (major part is 20 ~ 30 ran), and be almost turbulent flow, particulate matter motion is very complicated.Therefore, measuring range can be caused little, and precision is low.
Therefore, in order to the discharge that the rugged environment in Diesel Engine Exhaust Pipe and efficient diagnosis can be avoided to measure particulate matter, need to take the granular material discharged diagnostic method of a kind of Novel external diesel engine for automobile and device.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art, and the granular material discharged diagnostic method of a kind of Novel external diesel engine for automobile and device are provided.
For realizing object of the present invention, the invention discloses the granular material discharged diagnosis apparatus of a kind of Novel external diesel engine for automobile, it is characterized in that, the sensor unit comprising control unit (DCU) and be connected with DCU, described sensor unit is for gathering current value, it comprises ionization pole and pickup electrode, described ionization pole portion envelops has high-temperature insulation stoneware pipe, described high-temperature insulation stoneware pipe portion envelops has electric insulating sealant and portion envelops to have common insulating ceramics pipe, described conventional ceramic pipe, ionization pole and earth shield shell form ionized region, described ionized region is communicated with sampling channel by ionized region entrance, the hole communicated by air is communicated with air, described sampling channel is communicated with outlet pipe by exhaust thief hatch.
Wherein, described ionization pole built-in thermoelectric resistance and the even thermometric line of K.
Correspondingly, present invention also offers the granular material discharged diagnostic method of a kind of Novel external diesel engine for automobile, described method uses device as claimed in claim 1, comprises the steps:
Under the pressure difference effect of step 1. engine exhaust between outlet pipe and ambient air, enter sampling channel by the thief hatch of measuring device;
Particulate matter during step 2. is vented enters the electrostatic ionized region of measuring device by measuring hole and charged, thus static discharge current is reduced, and the current value of this reduction is gathered by ECU (Electrical Control Unit) (DCU) by pickup electrode;
Current value is inquired about corresponding particle concentration value to the ratio of initial drain and exports by step 3. in the MAP of having demarcated.
Wherein, described method also comprises the steps: the thermal resistor electrified regulation that ionization pole is built-in, and temperature can reach 600-800 degree, makes Deposited particulate matter be oxidized to carbon dioxide by heat conduction and thermal radiation, the self-cleaning function of implement device.
Wherein, described method also comprises the steps: that described device, because communicating in real time with ambient air, can realize without the zero point calibration function under exhaust particulate condition before each diesel-oil vehicle starts.
Compared with prior art, the invention has the beneficial effects as follows: the impact avoiding the rugged environment in Diesel Engine Exhaust Pipe, structure is simple, precision is high, and measuring range is large, can measure granular material discharged by efficient diagnosis, automatically can also mark zero point and automatically cleaning in addition.
Accompanying drawing explanation
Figure 1 shows that structural representation of the present invention;
Figure 2 shows that sensor unit structure schematic diagram of the present invention;
In figure: 1-ionization pole, 2-high-temperature insulation stoneware pipe, 3-pickup electrode, 4-electric insulating sealant, the common insulating ceramics pipe of 5-, 6-earth shield shell, 7-is vented thief hatch, 8-sampling channel, the hole that 9-air communicates, 10-ionized region, 11-ionized region entrance, 12-outlet pipe, 13-control unit (DCU).
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Should be noted that, " connection " described in the application and the word for expressing " connection ", as " being connected ", " being connected " etc., it both can refer to a certain parts with another parts and directly be connected, and also can refer to a certain parts and was connected with another parts by miscellaneous part.
As Fig. 1, shown in Fig. 2, the granular material discharged diagnosis apparatus of a kind of Novel external diesel engine for automobile is provided in the embodiment of the present invention, the sensor unit comprising control unit (DCU) 13 and be connected with DCU, described sensor unit is for gathering current value, it comprises ionization pole 1 and pickup electrode 3, described ionization pole portion envelops has high-temperature insulation stoneware pipe 2, described high-temperature insulation stoneware pipe 2 portion envelops has electric insulating sealant 4 and portion envelops to have common insulating ceramics pipe 5, described conventional ceramic pipe 5, ionization pole 1 and earth shield shell 6 form ionized region 10, described ionized region 10 is communicated with sampling channel 8 by ionized region entrance 11, the hole 9 communicated by air is communicated with air, described sampling channel 8 is communicated with outlet pipe 12 by exhaust thief hatch 7.
In a preferred embodiment, described ionization pole 1 built-in thermoelectric resistance and the even thermometric line of K.
Correspondingly, present invention also offers the granular material discharged diagnostic method of a kind of Novel external diesel engine for automobile, the method uses above-mentioned device, during use, under the pressure difference effect of engine exhaust between outlet pipe 12 with ambient air (hole 9 that air communicates), enter sampling channel 8 by the exhaust thief hatch 7 of measuring device; Particulate matter in exhaust flow velocity in passage reduces gradually, utilizes the interaction of particulate matter-particulate matter and particulate matter-collide with sampling channel 8 inwall of ground connection simultaneously, makes it self-contained electric charge and eliminate; Then particulate matter enters the electrostatic ionized region 10 of measuring device by ionized region entrance 9 and charged, thus static discharge current is reduced, the current value of this reduction is gathered by ECU (Electrical Control Unit) (DCU) 13 by pickup electrode 3, then it is inquired about corresponding particle concentration value to the ratio of initial drain and export in the MAP of having demarcated.
In a preferred embodiment, after measuring device work certain hour, its ionization pole 1 and pickup electrode 3 can deposit one deck particulate matter, in order to ensure measuring accuracy and normal work, the thermal resistor electrified regulation that ionization pole 3 is built-in, temperature is monitored by the even thermometric line of K can reach 600-800 degree, makes Deposited particulate matter be oxidized to carbon dioxide by heat conduction and thermal radiation, the self-cleaning function of implement device.
In a preferred embodiment, before each diesel-oil vehicle starts, measuring device, because communicating in real time with ambient air (hole 9 that air communicates), can realize without the zero point calibration function under exhaust particulate condition that (initial drain ensures that measured value effectively and stable accuracy.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the granular material discharged diagnosis apparatus of Novel external diesel engine for automobile, it is characterized in that, the sensor unit comprising control unit (DCU) and be connected with DCU, described sensor unit is for gathering current value, it comprises ionization pole and pickup electrode, described ionization pole portion envelops has high-temperature insulation stoneware pipe, described high-temperature insulation stoneware pipe portion envelops has electric insulating sealant and portion envelops to have common insulating ceramics pipe, described conventional ceramic pipe, ionization pole and earth shield shell form ionized region, described ionized region is communicated with sampling channel by ionized region entrance, the hole communicated by air is communicated with air, described sampling channel is communicated with outlet pipe by exhaust thief hatch.
2. the granular material discharged diagnosis apparatus of Novel external diesel engine for automobile according to claim 1, is characterized in that, described ionization pole built-in thermoelectric resistance and the even thermometric line of K.
3. the granular material discharged diagnostic method of Novel external diesel engine for automobile, is characterized in that, described method uses device as claimed in claim 1, comprises the steps:
Under the pressure difference effect of step 1. engine exhaust between outlet pipe and ambient air, enter sampling channel by the thief hatch of measuring device;
Particulate matter during step 2. is vented enters the electrostatic ionized region of measuring device by measuring hole and charged, thus static discharge current is reduced, and the current value of this reduction is gathered by ECU (Electrical Control Unit) (DCU) by pickup electrode;
Current value is inquired about corresponding particle concentration value to the ratio of initial drain and exports by step 3. in the MAP of having demarcated.
4. the granular material discharged diagnostic method of Novel external diesel engine for automobile according to claim 3, it is characterized in that, described method also comprises the steps: the thermal resistor electrified regulation that ionization pole is built-in, temperature can reach 600-800 degree, Deposited particulate matter is made to be oxidized to carbon dioxide by heat conduction and thermal radiation, the self-cleaning function of implement device.
5. the granular material discharged diagnostic method of Novel external diesel engine for automobile according to claim 3, it is characterized in that, described method also comprises the steps: before each diesel-oil vehicle starts, described device, because communicating in real time with ambient air, can realize without the zero point calibration function under exhaust particulate condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818430.9A CN105298608A (en) | 2015-11-23 | 2015-11-23 | Diagnostic method and device for particulate matter discharging for novel external automotive diesel engine |
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| CN201510818430.9A CN105298608A (en) | 2015-11-23 | 2015-11-23 | Diagnostic method and device for particulate matter discharging for novel external automotive diesel engine |
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| CN105298608A true CN105298608A (en) | 2016-02-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327334A (en) * | 2016-08-15 | 2017-11-07 | 河南职业技术学院 | A kind of motor vehicle exhaust emission fault diagnosis system |
| WO2018019757A1 (en) * | 2016-07-26 | 2018-02-01 | Continental Automotive Gmbh | Particle sensor with a deflection element |
| WO2018019759A1 (en) * | 2016-07-26 | 2018-02-01 | Continental Automotive Gmbh | Particle sensor with a protection element against soiling |
| CN111344548A (en) * | 2017-09-06 | 2020-06-26 | 维特思科科技有限责任公司 | Particulate sensor for internal combustion engine |
| CN111537412A (en) * | 2020-05-08 | 2020-08-14 | 重庆超力高科技股份有限公司 | Emission monitoring device, system and method |
| DE102016201343B4 (en) | 2016-01-29 | 2023-09-21 | Emisense Technologies Llc | Sensor for a motor vehicle and method for producing a sensor for a motor vehicle |
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| CN205117468U (en) * | 2015-11-23 | 2016-03-30 | 中国人民解放军军事交通学院 | Novel external diesel engine for automobile particulate matter discharges diagnosis device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016201343B4 (en) | 2016-01-29 | 2023-09-21 | Emisense Technologies Llc | Sensor for a motor vehicle and method for producing a sensor for a motor vehicle |
| WO2018019757A1 (en) * | 2016-07-26 | 2018-02-01 | Continental Automotive Gmbh | Particle sensor with a deflection element |
| WO2018019759A1 (en) * | 2016-07-26 | 2018-02-01 | Continental Automotive Gmbh | Particle sensor with a protection element against soiling |
| DE102016213641B4 (en) | 2016-07-26 | 2023-03-30 | Emisense Technologies Llc | Particle sensor with deflection element |
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| CN111537412A (en) * | 2020-05-08 | 2020-08-14 | 重庆超力高科技股份有限公司 | Emission monitoring device, system and method |
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