WO2022105900A1 - Dispositif de détection - Google Patents

Dispositif de détection Download PDF

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Publication number
WO2022105900A1
WO2022105900A1 PCT/CN2021/131940 CN2021131940W WO2022105900A1 WO 2022105900 A1 WO2022105900 A1 WO 2022105900A1 CN 2021131940 W CN2021131940 W CN 2021131940W WO 2022105900 A1 WO2022105900 A1 WO 2022105900A1
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WIPO (PCT)
Prior art keywords
detection device
fuel
exhaust
sulfur
light
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PCT/CN2021/131940
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English (en)
Chinese (zh)
Inventor
赵栋
钱枫
曹红枫
宋同健
孙祥
姜宝龙
崔桐林
祁佳琳
刘涛
石磊
杨栋
张步
喻远艺
解洪兴
何新
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山东鸣川汽车集团有限公司
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Priority claimed from PCT/CN2021/105316 external-priority patent/WO2022105258A1/fr
Application filed by 山东鸣川汽车集团有限公司 filed Critical 山东鸣川汽车集团有限公司
Publication of WO2022105900A1 publication Critical patent/WO2022105900A1/fr

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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
    • G01N15/02—Investigating particle size or size distribution
    • 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

Definitions

  • the invention relates to the field of environmental technology, and in particular, to a fuel detection device.
  • diesel engines need to install complex after-treatment systems, which require diesel engines to use high-quality diesel, especially diesel with low sulfur content.
  • the high sulfur content of diesel oil is the main reason for the failure of diesel engine aftertreatment system. Due to the high sulfur content of diesel, the failure of the diesel engine aftertreatment system will not only bring about the problem of pollution and emission, but also affect the normal operation of the motor vehicle power system, increase the probability of damage and reduce the service life.
  • heavy-duty diesel vehicles with China V emission standards are also facing the same problem. Similar emission standards are implemented in other countries, which also face the challenge of high fuel sulphur content.
  • the exhaust gas treatment system using DOC and molecular sieve SCR requires the use of low-sulfur oil at least below 50ppm, and the exhaust gas treatment system using DPF requires the use of ultra-low-sulfur oil below 10ppm.
  • Sulfur and its derivatives in fuel oil affect exhaust gas treatment systems: Catalyst-containing devices in the exhaust gas treatment system (such as DOC and SCR, especially molecular sieve SCR), exhaust gas recirculation (EGR) and DPF will be sulfated Derivative deposits are "poisoned” or corroded, and the conversion efficiency of SCR decreases, resulting in an increase in NOx emission levels. Moreover, DPF regeneration cannot eliminate sulfate, and the use of high-sulfur fuel oil is likely to cause frequent regeneration and DPF failure. Sulfur in fuel also affects PM emissions, resulting in an increase in PM emissions. The sulfur in the fuel also affects the working life of the engine. The SO 2 and SO 3 generated by the combustion of the sulfur in the fuel will form sulfurous acid and sulfuric acid when the temperature is high when the sulfur in the fuel is burned. It also degrades the lubricating oil when it enters the cylinder walls and crankcase.
  • the inventors have found through a lot of research that due to the basic measurement principle used by the existing fuel sulfur content monitoring technology, the installation method of the equipment, and the current situation of miniaturization of the equipment, the existing vehicle diesel sulfur content monitoring technology has many deficiencies.
  • one of the objectives of the present invention is to improve the detection efficiency of sulfur content in exhaust gas or fuel.
  • a vehicle-mounted automatic fuel quality sensing device such as a low-cost detector, can be installed on the automobile instead of sampling detection at the gas station, thereby achieving high efficiency, A wide range of fuel detection, reducing the harm caused by the use of high-sulfur fuel.
  • the gas sulfur dioxide detection device can be miniaturized by applying an innovative technical solution, and installed on the automobile exhaust device to measure the exhaust gas emitted by the automobile.
  • the sulfur dioxide in the fuel can be obtained by combining with the operating data of the automobile engine.
  • a method for detecting the sulfur content of fuel oil is provided. Most of the sulfur element in automobile fuel is converted into sulfur dioxide gas and discharged out of the car with the exhaust gas after the engine is burned.
  • the light emitted by the beam emitting end is used to illuminate the exhaust gas to be tested, and the optical path formed by the light emitted by the beam emitting end is called the detection light path. After the light is converted into an electrical signal, the sulfur dioxide content in the exhaust is calculated.
  • the beam emitting end can be a laser generator, LED, xenon lamp and other light-emitting devices; the beam receiving end is a device that converts the received optical signal into an electrical signal, and can be a photoelectric conversion element such as a photodiode (PD).
  • PD photodiode
  • a fuel sulfur content detection device including a detector control unit, wherein the detection device is arranged after the exhaust manifold of the engine, and is used to detect the concentration of sulfur dioxide gas in the exhaust gas, and the detector
  • the control unit is configured to collect the parameters of engine intake air flow and fuel injection quantity, and combine with the concentration of sulfur dioxide gas to obtain the sulfur content in the fuel.
  • the detection device is an optical detector, and the optical detector adopts one or a combination of ultraviolet absorption method, infrared absorption method or ultraviolet fluorescence method.
  • some embodiments of the present invention provide a preferred technical solution, using the data of sulfur dioxide content in the exhaust gas and the data of the engine, the data of the engine is the engine displacement, the engine speed, the fuel injection
  • the sulfur content in the fuel can be indirectly obtained by calculating the data such as quantity, intake air volume, intake air temperature, exhaust temperature, intake pressure, exhaust pressure, torque, etc.
  • some embodiments of the present invention provide a preferred technical solution.
  • the treatment methods of engine exhaust include thermal insulation of monitoring devices, dust removal of particulate matter in exhaust, and avoidance of condensation of water vapor in exhaust. These methods can improve the accuracy of the determination of sulfur dioxide in the exhaust gas.
  • a technical solution involved in the present invention is characterized in that, under vehicle-mounted conditions, the sulfur dioxide in the exhaust gas is detected by an optical gas sulfur dioxide detection device, and the sulfur content in the liquid fuel is indirectly detected.
  • Optical gas sulfur dioxide detection devices use optical means, so the response is fast, the volume is small and the cost is low.
  • the optical means does not directly contact the test sample, it does not damage the test sample, does not need to use other auxiliary gases/liquids, and does not directly contact the test sample, which brings the characteristics of long life, no corrosion and high temperature resistance.
  • Embodiment 1 A detection device, comprising a detector control unit, wherein the detection device is arranged on or after an exhaust manifold of an engine to detect the concentration of sulfur dioxide gas in the exhaust gas, and the detector control unit is configured In order to collect the parameters of engine intake air flow and fuel injection quantity, and combine the sulfur dioxide gas concentration, determine the sulfur content in the fuel oil.
  • Embodiment 2 The detection device according to Embodiment 1-1, wherein the detection device is an optical detector, and the optical detector is one or a combination of an ultraviolet absorption type, an infrared absorption type, or an ultraviolet fluorescence type .
  • Embodiment 3 The detection device according to Embodiment 1-2, wherein the detection device comprises a beam emitting end and a beam receiving end, and the beam emitting ends and the beam receiving ends are centrally/distributedly arranged in a row.
  • the light beam transmitting end is operable to establish a detection light path
  • the detection light path is arranged in a monitoring cavity
  • the exhaust gas passes through the monitoring cavity
  • the light beam receiving end is configured to receive light from the detection light path .
  • Embodiment 4 The detection device of Embodiments 1-3, wherein the detection device comprises a beam transmitting end operable to establish a detection optical path, and a beam receiving end, the beam receiving end being configured to receive fluorescence from the monitoring area.
  • Embodiment 5 The detection device of Embodiments 1-4, wherein the detection device is disposed between the oxidation catalytic converter and the exhaust manifold.
  • Embodiment 6 The detection device according to Embodiment 1-5, wherein a reflection member is provided in the detection cavity to reflect the light emitted by the light beam emitting end to the light beam receiving end.
  • Embodiment 7 The detection device of Embodiments 1-6, wherein the reflecting member is configured to achieve a number of light reflections of 1-10 times.
  • Embodiment 8 The detection device according to Embodiments 1-7, wherein the reflection component is a total reflection mirror.
  • Embodiment 9 The detection device of Embodiments 1-8, wherein the detector control unit is configured to: start the calculation of the concentration of sulfur in the fuel according to a preset rule, and the preset rule is: When the engine is in a stable condition, the calculation of the sulfur element concentration in the fuel is started.
  • Embodiment 10 The detection device of Embodiments 1-9, wherein the steady state is an idle speed state or a steady state state.
  • Embodiment 11 The detection device of embodiments 1-10, wherein the detection device further comprises a particulate trap, and,
  • the detector control unit is configured to: according to the preset rule, determine whether to perform the calculation of the sulfur element concentration in the fuel, the preset rule further includes: when the particulate trap is in an active regeneration state, not to perform Calculation of sulfur element concentration in fuel oil.
  • Embodiment 12 The detection apparatus of Embodiments 1-11, wherein the detector control unit is configured to: calculate the sulfur content in the fuel oil according to the following formula:
  • Embodiment 13 The detection device of Embodiments 1-12, wherein the detector control unit is configured to: volume concentration of sulfur dioxide, intake mass flow rate based on intake position of the oxidizing catalytic converter , fuel injection mass flow rate, sulfur element molar mass, and gas molar mass at the intake position to determine the sulfur content in the fuel oil; the sulfur content in the fuel oil is the fuel sulfur element mass concentration.
  • Embodiment 14 The detection apparatus of Embodiments 1-13, wherein the detector control unit is configured to: calculate the sulfur content in the fuel oil according to the following formula:
  • Embodiment 15 The detection device according to claims 1-14, wherein the light beam emitting end further comprises a laser generator, a xenon lamp or an LED light source, and the light beam receiving end is configured to receive the light from the light beam via the first lens group. light or fluorescence.
  • Embodiment 16 The detection device of claims 1-15, wherein the detection device further comprises a temperature sensor, the detector control unit is connected to the temperature sensor, and the detector control unit obtains temperature sensor measurements The gas temperature data is used to compensate/correct the sulfur dioxide gas concentration data.
  • Embodiment 17 The detection device of claims 1-16, wherein the detector control unit is configured to determine the concentration of one or more of sulfur dioxide, nitrogen dioxide, nitric oxide, carbon monoxide, carbon dioxide .
  • Embodiment 18 The detection device according to claims 1-17, wherein the laser generator and the LED light source are optically coupled to the second lens group through an aspheric lens and an optical fiber.
  • Embodiment 19 The detection device according to claims 1-18, wherein the first lens group at the light beam receiving end further comprises two groups of superimposed sub-magnifying lenses.
  • Embodiment 20 The detection device of claims 1-19, further comprising heating means operable to heat the base, the beam emitting aperture, and the beam receiving aperture to remove accumulated dust.
  • Embodiment 21 The detection device of claims 1-20, wherein the heating device is a ceramic heating ring or a resistive heating ring.
  • Embodiment 22 The detection device according to Embodiment 1-21, wherein the beam emitting end and the beam receiving end are integrated in a casing, and a temperature insulating component made of a heat insulating material is arranged inside the casing .
  • Embodiment 23 The detection device according to Embodiments 1-22, wherein a heat shield ring is provided at the joint portion of the housing and the base.
  • Embodiment 24 The detection device of Embodiments 1-23, wherein the heat shield ring is made of a ceramic material.
  • Embodiment 25 The detection device of Embodiments 1-22, wherein the interior of the housing is filled with insulating material.
  • Embodiment 26 The detection device according to embodiments 1-25, wherein the heat insulating material comprises a mixture of aerogel pads, aerogel powder, ceramic powder, polytetrafluoroethylene, PEEK, and POM glass fiber mixture. one or more.
  • Embodiment 27 The detection device according to Embodiments 1-26, further comprising a communication module and an OBD module, wherein the detection device, the communication module, and the OBD module are respectively connected to the detector control unit.
  • Embodiment 28 The detection device according to Embodiments 1-27, wherein the data transmitted by the communication module and the data platform through one or more communication protocols includes monitoring data, location information, time information, and vehicle operation information data.
  • Embodiment 29 The detection apparatus according to Embodiments 1-28, wherein the communication module is configured to receive an instruction issued by the data platform for adjusting the operation of the detection apparatus.
  • Embodiment 30 The detection apparatus of Embodiments 1-29, wherein the communication module is configured to transmit data to the data platform at a transmission frequency of seconds or minutes.
  • Embodiment 31 The detection device according to Embodiment 1-30, wherein the OBD module is configured to collect operation information of the vehicle, wherein the operation information of the vehicle includes engine speed, engine torque, accelerator position, One or more of intake air flow, exhaust temperature, DPF temperature, location, time, and the vehicle operation information is transmitted to the detector control unit through the data interface.
  • the OBD module is configured to collect operation information of the vehicle, wherein the operation information of the vehicle includes engine speed, engine torque, accelerator position, One or more of intake air flow, exhaust temperature, DPF temperature, location, time, and the vehicle operation information is transmitted to the detector control unit through the data interface.
  • Embodiment 32 The detection device according to Embodiments 1-31, wherein the detector control unit is configured to control the operation state of the detection device, including the on-off state of the detection device, the calibration trigger condition, the sampling frequency.
  • Embodiment 33 A motor vehicle, comprising an exhaust passage, an oxidation-type catalytic converter, and the detection device of any one of claims 1-32, wherein the detection device is mounted on the side of the exhaust passage. On the wall, the detection device runs through the wall of the exhaust passage and faces the inside of the exhaust pipe;
  • the exhaust passage includes an exhaust pipe or an exhaust manifold.
  • Embodiment 34 A motor boat, wherein the detection device of any one of claims 1-32 is fitted.
  • Embodiment 35 A boiler smoke exhaust device, wherein the detection device according to any one of claims 1-32 is equipped.
  • the detection device has the characteristics of being independent and miniaturized, so it can generally be directly installed on the exhaust device to directly measure the exhaust device in the working state, so it can enable the realization of the sulfur content in the fuel.
  • vehicle-mounted dynamic monitoring If supplemented by some on-board electronic equipment, the results of dynamic monitoring are reported to the driver in real time, etc., the real-time monitoring of fuel sulfur content can be realized. If the monitoring results of sulfur content are transmitted to the monitoring server through some on-board communication means, the server can realize online monitoring and management of fuel sulfur content of vehicles. The same can also be applied to other scenarios other than vehicles that require real-time/online monitoring of the sulfur content in fuel.
  • the vehicle is equipped with a real-time fuel sulfur content detection device and an alarm device, which can prompt the driver in time after high-sulfur fuel is used, thereby reducing damage to the motor vehicle after-treatment facility and engine.
  • the real-time fuel sulfur content detection device combined with the data platform can realize the recording and tracing of fuel quality, and achieve functions such as vehicle condition assessment, damage liability definition, insurance claim settlement, and management and law enforcement.
  • Figure 1 is a schematic diagram of the basic structure of the detection device
  • Figure 2 is a schematic diagram of forward scattering and back scattering
  • Figure 3 is a schematic diagram of a 90° embodiment
  • Figure 4 is a schematic diagram of the data platform
  • Figure 5 is the installation angle on the horizontal exhaust pipe
  • Figure 9 is the installation direction on the horizontal exhaust pipe
  • Figure 7 is the installation position on the horizontal exhaust pipe
  • Figure 8 is the installation position on the vertical exhaust pipe
  • FIG. 9 is a schematic diagram of the monitoring area setting with a diversion structure
  • Figure 10 is a schematic diagram of the detection device arranged on the device with DOC discharge
  • Figure 11 is a schematic diagram of the detection device arranged on the discharge device with DOC, SCR
  • Figure 12 is a schematic diagram of the detection device arranged on the exhaust device with DOC, DPF, SCR
  • Figure 13 is a schematic diagram of the detection device arranged on the exhaust device with DOC, DPF, SCR
  • Figure 15 is a schematic diagram of the detection device for measuring sulfur dioxide by fluorescence method
  • Figure 16 is a schematic diagram of a sulfur dioxide detection device that measures one reflection by absorption method
  • Figure 17 is a schematic diagram of a sulfur dioxide detection device that measures two reflections by absorption method
  • Figure 18 is a schematic diagram of a sulfur dioxide detection device with a filter component after 7 reflections measured by absorption method
  • Figure 19 is a schematic diagram of the arrangement of the detection device, the DOC, and the exhaust manifold
  • 50-detection device 200-beam transmitting end; 210-fiber; 230-transmitting light path; 240-transmitting hole; 250-transmitting light; 300-beam receiving end; 310-receiving hole; 320-receiving light; 330-lens; 400-exhaust channel; 410-exhaust channel wall; 420-uniform flue gas; 430-uniform flue gas; 500-target monitoring fluid; 600-detector control unit; 610-positioning module; 620- OBD module; 630-communication module; 652-exhaust manifold; 710-data platform; 720-environmental monitoring system; 730-user terminal; 350-reflection structure; 450-exhaust pipe; 460-filter part.
  • Oxidation Catalytic Converter Installed in the exhaust system of diesel vehicles, through catalytic oxidation reaction, it can reduce the emission of carbon monoxide, total hydrocarbons and soluble organic matter in particulate matter and other pollutants in exhaust after treatment. device.
  • the beam emission end is a light source component, and the light emitted by it can be used to illuminate the target monitoring fluid.
  • the beam receiving end is a component that receives absorbed light and fluorescence from the target monitoring fluid, which can convert the received light into electrical signals.
  • Target monitoring fluid is a fluid containing a target monitoring substance, and the target monitoring substance includes particles, particulate matter, gas and other substances, and the gas substance can be SO 2 , NO X and the like.
  • Exhaust channel a closed or semi-closed structure, which can accommodate the target monitoring fluid. It can be a tubular structure with openings at one end/two ends, or a tubular structure with openings at multiple ends.
  • the exhaust device includes exhaust passages and after-treatment facilities.
  • After-treatment facilities include DOC, SCR, and DPF.
  • the exhaust passage includes exhaust pipes, exhaust manifolds, and the like.
  • the monitoring cavity can be a structure independent of the exhaust device, a part of the exhaust device, or a structure arranged inside the exhaust device.
  • the observation area is the range of the target monitoring fluid that the receiving hole can observe.
  • the monitoring area is the area in the observation area where the beam irradiating the target monitoring fluid overlaps the observation area.
  • the optical path angle is the angle between the transmitting optical path and the receiving optical path.
  • Concentration critical layer The interface with the largest concentration change rate of the target monitoring substance in the target detection fluid is the concentration critical layer.
  • Zero boundary area when the target monitoring fluid flows, the area where the concentration of the target monitoring substance formed at the edge of the fluid tends to zero.
  • Zero-boundary effect In the zero-boundary area, the concentration of the target monitoring material tends to zero, and the interference of the target monitoring material in the area to scattering tends to zero.
  • the emission light path is the cavity through which the light emitted by the emission end of the beam passes through before irradiating into the exhaust channel
  • the receiving light path is the cavity through which the scattered light passes before irradiating the beam receiving end.
  • the receiving optical path is the path through which the scattered light enters the receiving end of the beam.
  • Exhaust manifold The exhaust manifold is connected to the cylinder block of the engine, and the exhaust of each cylinder is concentrated and introduced into the exhaust manifold with different pipelines.
  • the detection device detects the exhaust gas after the exhaust gas is concentrated by the exhaust manifold.
  • the sulfur content of vehicle fuel is fed back in real time by monitoring sulfur dioxide (SO 2 ) in the exhaust gas.
  • SO 2 sulfur dioxide
  • the detection device 50 includes a beam emitting end 200 , a beam receiving end 300 , a driving circuit, and a detector control unit 600 .
  • the beam emitting end 200 emits light to illuminate the exhaust gas to be tested
  • the beam receiving end 300 receives the light passing through the exhaust gas to be tested
  • the beam receiving end 300 converts the received light into electrical signals.
  • the detector control unit 600 collects data of the engine, such as engine displacement, engine speed, fuel injection amount, intake air amount, intake air temperature, exhaust temperature, intake pressure, exhaust pressure, torque and other data.
  • the detector control unit 600 obtains the sulfur dioxide concentration in the exhaust gas according to the electrical signal collected by the beam receiving end 300 and the power of the beam transmitting end 200, and calculates the sulfur content concentration in the fuel in combination with the data of the engine.
  • the sulfur element in diesel mainly exists in the form of thiophene compounds, and after combustion in the engine, sulfur dioxide (SO 2 ) is generated.
  • SO 2 sulfur dioxide
  • the sulfur content in the fuel is deduced.
  • Process and optimize the monitoring data by collecting the operating parameters of the vehicle: after the SO 2 concentration is measured, it is necessary to combine the data of the vehicle OBD, such as the air intake of the engine, engine speed, temperature, fuel injection amount, etc., to comprehensively calculate the fuel Sulfur content in.
  • OBD the data of the vehicle OBD, such as the air intake of the engine, engine speed, temperature, fuel injection amount, etc.
  • fuel sulfur content often refers to the concentration of sulfur in fuel.
  • the beam emitting end 200 can be a light-emitting device such as a laser generator, an LED, a xenon lamp, the light emitted by the beam emitting end 200 can be ultraviolet, visible light, and infrared rays;
  • the beam receiving end 300 is a device that converts the received optical signal into an electrical signal, It can be a photoelectric conversion element such as a photodiode (PD), and the light beam receiving end 300 can receive ultraviolet light, visible light, and infrared light.
  • PD photodiode
  • the detection device 50 is arranged on the exhaust device, and the exhaust device includes an exhaust passage and after-treatment facilities, and the after-treatment facilities include DOC, SCR, DPF, and the like.
  • the detection device 50 is arranged on the exhaust passage, and the exhaust passage includes an exhaust pipe and an exhaust manifold.
  • the treatment of other impurities in the exhaust gas can effectively increase the monitoring concentration of sulfur dioxide in the exhaust gas.
  • the treatment methods include increasing the design of filter equipment to use heat insulation, reducing the occurrence of water vapor condensation, and removing water.
  • the detection device 50 includes a beam emitting end 200 , a beam receiving end 300 , a driving circuit, and a detector control unit 600 .
  • the sulfur dioxide detector is installed after the engine exhaust manifold 652.
  • the beam emitting end 200 emits light to illuminate the exhaust gas to be measured
  • the beam receiving end 300 receives the light passing through the exhaust gas to be measured.
  • the substance to be tested in the gas absorbs light of a specific wavelength in the light
  • the light beam receiving end 300 converts the received light into an electrical signal, and calculates the sulfur content in the fuel oil.
  • the beam emitting end 200 can be an ultraviolet light source, and the ultraviolet beam emitting end 200 can be a light-emitting diode.
  • the beam emitting end 200 is connected to a collimator, and the beam emitting end 200 can be filtered to eliminate stray light interference.
  • the beam emitting end 200 emits The wavelength range is 180nm-300nm, the preferred wavelength range is 180nm-250nm, 200-230nm, 280-310nm, 200nm-300nm, 260-330nm, and the preferred wavelengths are 210nm, 213nm, 220nm, 290nm, 300nm.
  • 200 can be a deuterium lamp, an LED light source.
  • a filter is connected to the front of the beam receiving end 300, and the beam receiving end 300 may be an ultraviolet photodetector.
  • the wavelength range received by the beam receiving end 300 is 180-380nm, and the preferred wavelength ranges are 200nm-350nm, 210-230nm, 280nm-340nm, 280nm-650nm, 250nm-680nm, 290nm-300nm.
  • the narrow-band coating technology can be applied to make the light beam receiving end 300 receive light with a set wavelength.
  • the infrared beam emitting end 200 can be an infrared light source, and the infrared beam emitting end 200 can be a light-emitting diode.
  • the beam emitting end 200 is connected to a collimator, and the beam emitting end 200 can be filtered to eliminate stray light interference.
  • the beam emitting end 200 emits
  • the wavelength can be 3.6 ⁇ m-4.1 ⁇ m, 7.1 ⁇ m-7.5 ⁇ m, 6 ⁇ m-10 ⁇ m, 6.82 ⁇ m-9 ⁇ m, 1000-2000nm, 2300nm-2800nm, 3800nm-4200nm, preferably the wavelength range is 1100nm-1200nm, 1300nm-1400nm ,1550nm-1650nm, 2400nm-2500nm, 2460nm, 4000nm-4100nm, 4020nm.
  • the infrared beam emitting end 200 may be a broad-spectrum light source or an infrared blackbody light source.
  • the beam receiving end 300 may be an infrared pyroelectric detector.
  • a filter is connected to the front of the beam receiving end 300, and the beam receiving end 300 may be an infrared photodetector.
  • the detector control unit 600 collects data of the engine, such as engine displacement, engine speed, fuel injection amount, intake air amount, intake air temperature, exhaust temperature, intake pressure, exhaust pressure, torque and other data.
  • the detector control unit 600 calculates the electrical signal collected by the beam receiving end 300 to obtain the concentration of sulfur dioxide in the exhaust gas, and combines the data of the engine to obtain the concentration of sulfur content in the fuel.
  • the fluorescence analysis method is applied, and the detection device 50 includes a beam emitting end 200 , a beam receiving end 300 , a driving circuit, and a detector control unit 600 .
  • the light beam emitting end 200 emits light to illuminate the exhaust gas to be tested
  • the substance to be tested in the exhaust gas to be tested absorbs the light of a specific wavelength in the light and is excited
  • the substance to be tested is excited and radiates light to the outside
  • the beam receiving end 300 converts the radiated light into an electrical signal, and calculates the sulfur content in the fuel.
  • the beam emitting end 200 can be an ultraviolet light source, and the ultraviolet light source can be a light-emitting diode.
  • a collimator can be connected to the light source, and narrow-band filtering can also be performed on the light source to eliminate stray light interference.
  • the wavelength of the light source can be 160nm-300nm, preferably 240nm , 250nm, 260nm; a filter is connected to the front of the beam receiving end 300, and the beam receiving end 300 can be an ultraviolet photodetector.
  • a filter can be set in front of the beam receiving end 300 to filter out other unwanted stray light and only allow the excited fluorescence band to pass through. 390nm.
  • the car bus/OBD By connecting with the car bus/OBD, read the relevant operating data from the car bus, such as engine intake, engine speed, temperature, fuel injection and other information, and comprehensively calculate the sulfur content in the fuel.
  • the sulfur element in diesel mainly exists in the form of thiophene compounds, and after combustion in the engine, sulfur dioxide (SO 2 ) is generated.
  • SO 2 sulfur dioxide
  • the sulfur content in the fuel is deduced.
  • a calculation method for calculating the sulfur content in the fuel oil by the sulfur dioxide concentration of the exhaust gas is provided.
  • the mass of sulfur injected into the engine fuel should be equal to the mass of sulfur discharged from the exhaust.
  • the molar flow of element sulfur injected into the engine fuel should be equal to the molar flow of sulfur discharged from the exhaust. The efficiency of converting the sulfur element in the fuel into sulfur dioxide can be calculated more accurately by introducing the engine into the optimized scheme.
  • Sulfur mass in fuel oil Sulfur mass in exhaust gas
  • Fuel sulfur content Indicates the content of sulfur in the fuel, which can be either mass concentration or volume concentration
  • exhaust sulfur content Indicates the concentration of sulfur in the exhaust, which can be a mass concentration unit or a volume concentration unit
  • the concentration of exhaust sulfur dioxide Represents the concentration of sulfur dioxide in the exhaust, which can be a mass concentration unit or a volume concentration unit
  • the fuel injection flow r fuel which represents the flow of fuel injected into the engine when the engine is running, can be the fuel injection mass flow rm fuel , or is the fuel injection volume flow rv fuel
  • the fuel injection quantity m fuel represents how much fuel is injected to the engine within a certain period of time; the time t ; It can be the volume flow qv in ;
  • the intake air temperature T in which represents the temperature of the gas inhaled by the engine;
  • the exhaust flow q e which represents the flow of the exhaust gas after the engine is combusted, which can be
  • the calculation method of sulfur element mass in fuel oil is:
  • the calculation method of sulfur element mass in exhaust gas is:
  • the sulfur content in fuel oil is calculated as:
  • the sulfur content in the fuel can be obtained.
  • the sulfur content in the fuel is proportional to the concentration of sulfur dioxide gas in the exhaust gas and the exhaust gas flow; it is inversely proportional to the fuel injection amount and the conversion rate.
  • the unit needs to be unified in the application process. If mass concentration is used, other parameters need to be matched according to mass concentration; if volume concentration is used, other parameters need to be matched according to volume concentration, and ideal gas state equation and temperature parameters will be introduced for matching when volume concentration is used.
  • a calculation method for calculating the sulfur content in the fuel oil by the exhaust sulfur dioxide concentration is provided. Based on the sulfur dioxide volume concentration, intake mass flow, fuel injection mass flow, sulfur element molar mass, and gas molar mass at the intake position of the oxidizing catalytic converter at the intake position, the sulfur content in the fuel oil is obtained; the sulfur content in the fuel oil is obtained; is the mass concentration of fuel sulfur.
  • Fuel injection mass flow r mfuel ; fuel sulfur mass concentration (ppm) Intake mass flow qmin ; sulfur element molar mass M S ; exhaust gas molar mass Me ; conversion rate K SO2 of fuel sulfur into exhaust sulfur dioxide; exhaust sulfur dioxide volume concentration (ppmv)
  • the sulfur content in fuel oil is calculated as:
  • the sulfur content (ppm) in the fuel is proportional to the sulfur dioxide volume concentration (ppmv) in the exhaust, proportional to the sum of the fuel injection mass flow and the intake air flow, and inversely proportional to the fuel injection mass flow.
  • setting preset conditions to determine whether to calculate the sulfur content can make the calculated data more reliable and accurate.
  • a preset condition is that the engine is in a stable operating condition, and the fuel sulfur content or exhaust sulfur dioxide concentration is calculated, and the stable operating condition may be an idle speed operating condition or a steady state operating condition (WHSC).
  • WHSC steady state operating condition
  • a preset condition is that no calculation of fuel sulfur content or exhaust sulfur dioxide concentration is performed when the particulate filter is in active regeneration.
  • a preset condition is that when the engine load is in the range of 5%-80%, the fuel sulfur content or the exhaust sulfur dioxide concentration is calculated.
  • a preset condition is that when the temperature of the oxidizing catalytic converter is within the range of ⁇ 30% of the recommended operating temperature, the collected particulate matter data is used to calculate the fuel sulfur content.
  • a preset condition is that when the temperature of the oxidizing catalytic converter is not within the recommended operating temperature, the calculation of fuel sulfur content or exhaust sulfur dioxide concentration is not performed.
  • a preset condition is that when the engine speed exceeds or falls below the set value, the calculation of fuel sulfur content or exhaust sulfur dioxide concentration is not performed. If the engine speed is greater than 80%, 90% of the maximum speed, or lower than the recommended idle speed, the particulate matter data is invalid.
  • a preset condition is that when the engine torque exceeds or falls below the set value, the calculation of fuel sulfur content or exhaust sulfur dioxide concentration is not performed. If the engine speed is greater than 80%, 90% of the maximum torque, or lower than 10% of the maximum torque, the particulate matter data is invalid.
  • a calibration method of the detection device 50 uses the known sulfur content of fuel oil, and takes the engine operating condition and the change of the detection value of the detection device 50 under the corresponding working conditions as the input quantity, and obtains the change of the detection value of the detection device 50 under multiple engine operating conditions and the difference.
  • the correspondence between the sulfur content of the fuel oil is known. Replacing fuels with different sulfur contents to obtain multiple sets of corresponding relationships between the changes of the detection value of the detection device 50 and the sulfur content of the fuel oil under multiple sets of working conditions.
  • the change in the detected value may be a difference value, a ratio value, or the like.
  • the detector control unit 600 stores the corresponding relationship, and the detector collects the engine operating conditions and the detection value of the detection device 50, and can calculate the sulfur content of the fuel used according to the stored corresponding relationship.
  • a calibration method of the detection device 50 uses an accurate sulfur dioxide detection instrument to obtain accurate sulfur dioxide readings at the intake position of the oxidation catalytic converter.
  • the accurate sulfur dioxide reading is used to compare with the sulfur dioxide value calculated by the detector control unit 600, and a calibration factor is obtained.
  • the detector control unit 600 stores the calibration coefficient, and applies the calibration coefficient to calibrate the calculated sulfur dioxide value during operation.
  • a thermal insulation component made of thermal insulation material may be arranged inside the housing and filled with thermal insulation material to protect the beam emitting end 200 and the probe from being affected by temperature.
  • a temperature insulation structure can be added to the connection part between the shell and the base, such as a temperature insulation ring made of ceramic material to protect the beam emitting end 200 and the probe; the material of the base and other related parts can also be made of temperature-resistant and temperature-resistant materials.
  • a preferred thermal insulation method is to increase the distance between the beam emitting end 200 and the probe and (exhaust pipe), and reduce the influence of temperature on the beam emitting end 200 and the probe.
  • the outer shell uses a metal thin shell, and the thickness of the metal thin shell is 1-3mm, which reduces the area where the metal can conduct heat.
  • a temperature insulating component made of heat insulating material is arranged inside the casing, or filled with heat insulating material, so as to protect the beam emitting end 200 and the probe from being affected by temperature.
  • the inside of the metal shell is filled with thermal insulation material, and the components of the optical path are directly fixed to the inside of the ceramic.
  • the detection device 50 also includes a temperature sensor, the temperature sensor measures the temperature of the gas, and the detector control unit 600 is connected to the temperature sensor. Since the sulfur dioxide gas has a tendency to reduce the absorption ratio at different temperatures, adding the temperature sensor can be based on the temperature of the measured gas. Changes compensate the measured value.
  • a detection device 50 is provided.
  • the light beam emitting end 200 of the detection device 50 can emit light with various wavelengths.
  • the manner of emitting different wavelengths may be that multiple beam emitting ends 200 emit light of various desired wavelengths, or one beam emitting end 200 may emit light of various desired wavelengths through light splitting.
  • the detection device 50 can obtain the concentrations of sulfur dioxide, nitrogen dioxide, nitrogen monoxide, carbon monoxide, carbon dioxide and other gases.
  • the required wavelength can be adjusted according to the substance to be detected, such as nitrogen oxides (nitrogen monoxide, nitrogen dioxide), sulfur dioxide, carbon dioxide, carbon monoxide and other substances corresponding to the absorption wavelength, so that the detection device 50 can detect a variety of gases.
  • Receiving it can take a single receiver to receive the light absorbed by the gas to be measured. Different light absorbed by the gas to be measured can also be received by multiple receivers. Another method for the detection device 50 to detect multiple gases is to use the ultraviolet differential absorption method for monitoring.
  • a detection device 50 is provided.
  • the detection device 50 further includes a reflection part, the reflection part is arranged in the detection cavity, and the reflection part reflects the light emitted by the light beam emitting end 200 to the light beam receiving end 300.
  • the reflecting component reflects 1-15 times and 1-10 times the light emitted by the light beam emitting end 200 .
  • a preferred reflecting member may be a total reflection mirror. Setting up a reflector can achieve a long optical path in a small volume, and the experimental gas can fully contact the light in a limited space, improving the sensitivity of the device.
  • a preferred reflective component is coated with a high temperature, low loss coating. A preferred coating covers the surface of the quartz substrate.
  • a preferred coating has a reflection efficiency of more than 90% in the ultraviolet wavelength range of 230nm-320nm.
  • a preferred coating has a reflection efficiency of more than 95% in the 290nm ultraviolet band.
  • the mirror can be connected to a heating device to remove dust such as particulate matter from the exhaust.
  • the detection device 50 includes a particulate filter component, and the particulate filter component is arranged before the detection area, that is, upstream of the incoming gas direction of the detection area, to filter out the particulate matter in the gas, so that the detection of sulfur dioxide is more accurate.
  • the inventor found that since the existence of PM and some flue gas is relatively short-lived, and the influence amplitude can be clearly distinguished, the influence caused by PM can be filtered out through signal processing, such as signal differential processing through PM concentration data, and SO 2 can be extracted. content information.
  • the detection device 50 is provided with a heating device 160 on the base 100.
  • the heating device 160 is turned on, or the heating device 160 is manually turned on to prevent condensed water. generation.
  • the heating device 160 may be a ceramic heating ring, a resistive heating ring, or the like.
  • the generation of condensed water can also be reduced by increasing the exhaust ventilation rate.
  • a thermal insulation layer is arranged outside the monitoring chamber to reduce the heat of the exhaust gas from diffusing outward, and to maintain the temperature of the exhaust gas to reduce the generation of condensed water.
  • the inventor found that by applying an innovative technical solution, without extracting gas from the exhaust channel, the exhaust channel is directly used as a monitoring cavity, and a monitoring device can be formed inside the monitoring cavity.
  • the regional method realizes the monitoring of the target monitoring fluid pollutants, which can greatly reduce the complexity of the system and is conducive to the miniaturization of the equipment.
  • the application of this technical concept and related technical solutions can also realize that the monitoring instrument is set outside the exhaust pipe, and the main monitoring device is not in contact with the high-temperature and high-pollution exhaust gas, which can effectively reduce the high temperature and high pollution caused by the monitoring instrument. Impact.
  • the detection device 50 includes a beam receiving end 300 , a beam transmitting end 200 , and a base 100 .
  • One end of the base 100 is provided with a transmitting hole 240 and a receiving hole 310 , a transmitting light path 230 and a receiving light path 340 are arranged inside the base 100 , and the other end of the base 100 is connected to the device casing.
  • the light emitted by the beam emission end 200 passes through the emission light path 230 and the emission hole 240 in turn, and is irradiated into the exhaust channel 400 into the observation area.
  • the three-dimensional space (overlapping area) where the beam and the observation area meet is the monitoring area of the detector. .
  • the light beam enters the exhaust channel 400 to generate absorption or excitation fluorescence effect, and the light absorbed by the substance to be tested or the fluorescence generated after the substance to be tested is excited is irradiated to the beam receiving end 300 through the receiving hole 310 and the receiving light path 340 . , as shown in Figure 1 or Figure 2.
  • the monitoring area is located in the exhaust channel 400, which can be the exhaust duct of motor vehicles, construction machinery, and motor boats; it can also be a flue gas duct such as an exhaust duct of cooking oil fume, and an exhaust duct of a boiler.
  • An optical collimator can also be connected to the front of the beam emitting end 200 , and the light emitted by the beam emitting end 200 passes through the optical collimator to form parallel light, and then passes through the emitting light path 230 and the emitting hole 240 in sequence, and then irradiates the exhaust channel 400 .
  • the optical collimator used in the beam emitting end 200 has an optical coupling efficiency of ⁇ 75%, which can reduce the power of the light source of the beam emitting end 200.
  • the low-power light source has higher temperature resistance, working life and stability, which can improve the detection device 50. reliability and longevity.
  • the lens 330 that can be used by the optical collimator includes a Fresnel lens, a self-focusing lens Glens, Clens, etc.; a lens group can also be used to collimate the light emitted by the light source.
  • the lens group and optical device used for the light beam emitting end 200 may also be referred to as the second lens group.
  • the front part of the beam emitting end 200 can also be connected with an optical collimator and an optical fiber 210 in sequence. After the light emitted by the beam emitting end 200 passes through the optical collimator to form parallel light, it is conducted through the optical fiber 210 and enters the emission light path 230, and is transmitted through the optical fiber 210.
  • the holes 240 are irradiated into the intake and exhaust passages 400 .
  • the front of the beam receiving end 300 is provided with a lens 330 or a lens group, the scattered light enters the receiving light path 340 through the receiving hole 310 , and is converged by the lens 330 to be irradiated on the beam receiving end 300 .
  • An optical fiber 210 and a lens 330 may also be arranged in sequence at the front of the beam receiving end 300.
  • the scattered light enters the receiving light path 340 through the receiving hole 310, and is condensed by the lens 330 to illuminate the optical fiber 210.
  • the optical fiber 210 conducts the converged scattered light to the beam on the receiving end 300.
  • the lens 330 disposed at the front of the light beam receiving end 300 or the type of lens 330 used by the lens group may be a convex lens, a Fourier lens, or the like.
  • an optical device such as a lens 330 or a lens group
  • the scattered light enters the receiving light path 340 through the receiving hole 310 , and is converged by the lens group to illuminate the beam receiving end 300 .
  • Other optical devices can also be added to the front of the beam receiving end 300, such as an optical fiber 210 and a lens 330 or a lens group arranged in sequence, and the scattered light enters the receiving light path 340 through the receiving hole 310, and is converged by the lens 330 or the lens group to illuminate the optical fiber 210
  • the optical fiber 210 conducts the converged scattered light to the light beam receiving end 300 .
  • the lens group for receiving the converging scattered light is also called the first lens group.
  • Equipping the vehicle with the on-board fuel sulfur content monitoring device combined with the data platform can realize the complete monitoring of the fuel used by the vehicle.
  • they can trace the fuel quality of their vehicles, and provide support in terms of vehicle condition assessment, damage liability definition, and insurance claims. Relevant data can also be provided to relevant regulatory authorities to support law enforcement.
  • Monitoring on-board fuel can provide real-time feedback on the sulfur content in the fuel. When the sulfur content exceeds the acceptable range of the aftertreatment device, an alarm can be issued or emergency measures can be taken to reduce the damage caused to the aftertreatment facility and engine of the vehicle. damage. At the same time reduce pollutant emissions from motor vehicles.
  • the detection device 50 includes a detector control unit 600 , a communication module, and an OBD module 620 , the detection device 50 includes a beam receiving end 300 , a beam transmitting end 200 , a base 100 , and a transmitting hole is provided at one end of the base 100 240.
  • the receiving hole 310, the base 100 has a transmitting light path 230 and a receiving light path 340 inside, and the other end of the base 100 is connected to the device casing.
  • the beam receiving end 300 and the beam transmitting end 200 are integrated and packaged in the casing.
  • the detection device 50 has an information transmission function.
  • the communication module uses the communication between the detection device 50 and the data platform 710 to upload monitoring data, location information, time information, vehicle operation information and other data, and can also receive the adjustment detection device issued by the data platform 710. 50 instructions to run.
  • the communication module 630 can transmit the monitored data, location data and time information to the data platform 710 wirelessly.
  • the communication module 630 uses data transmission methods and data platforms 710 such as GPRS, 4G, 5G, Bluetooth, WIFI, and the Internet of Things.
  • the communication module 630 can also check the SIM for network data transmission.
  • the communication module 630 may transmit data to the data platform 710 at intervals of seconds and minutes.
  • the detector control unit 600 is connected to the vehicle power supply, supplies power to the detection device 50 , the communication module 630 , and the OBD module 620 , and controls and processes data among the detection device 50 , the communication module 630 , and the OBD module 620 .
  • the detector control unit 600 may have a positioning function or a data interface with the positioning module 610 , and the positioning function or the positioning module may record the vehicle space-time information in real time using positioning technologies such as GPS and Beidou.
  • the OBD module 620 is connected to the vehicle bus and exchanges data.
  • the OBD module 620 can collect vehicle operation information, such as engine speed, engine torque, accelerator position, intake air flow, exhaust temperature, DPF temperature, position, time and other information data, and transmitted to the detector control unit 600 through the data interface.
  • the data platform 710 can receive the data returned by the detection device 50, and the data platform 710 stores and processes the data.
  • the data platform 710 detects the data returned by the device 50, as well as other data that may be collected. Using these data, the data platform 710 can comprehensively process the data, and generate data presentation methods such as data lists, data rankings, and visual maps. These generated processing results such as the generated data list, data ranking, and visual map can be sent to the user terminal 730 through the network, and the user can query and use them according to their needs.
  • the data platform 710 can also detect the operation of the device 50, such as turning on and off the detecting device 50, adjusting the parameters of the detecting device 50, etc., as shown in FIG. 4 .

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  • Chemical & Material Sciences (AREA)
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  • Physics & Mathematics (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract

L'invention concerne un dispositif de détection de carburant, comprenant un détecteur de dioxyde de soufre et une unité de commande de détecteur (600). Le détecteur de dioxyde de soufre est disposé derrière un collecteur d'échappement de moteur (652) et est configuré pour mesurer la concentration de dioxyde de soufre gazeux dans le gaz d'échappement; l'unité de commande de détecteur (600) est configuré pour collecter la quantité de flux d'air admission du moteur et les paramètres de quantité d'injection de carburant, et en combinaison avec la concentration du dioxyde de soufre gazeux, obtenir la teneur en soufre dans le carburant. Par conséquent, la teneur en soufre dans un corps lipidique peut être efficacement obtenue. La présente invention concerne également un véhicule automobile.
PCT/CN2021/131940 2020-11-21 2021-11-19 Dispositif de détection WO2022105900A1 (fr)

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CN202011315734.0 2020-11-21
CN202011315734 2020-11-21
CNPCT/CN2021/091313 2021-04-30
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CNPCT/CN2021/091318 2021-04-30
CN2021091316 2021-04-30
CNPCT/CN2021/091316 2021-04-30
CN2021091313 2021-04-30
CNPCT/CN2021/105314 2021-07-08
CNPCT/CN2021/105315 2021-07-08
CNPCT/CN2021/105316 2021-07-08
PCT/CN2021/105316 WO2022105258A1 (fr) 2020-11-21 2021-07-08 Procédé de surveillance de l'environnement
PCT/CN2021/105314 WO2022105256A1 (fr) 2020-11-21 2021-07-08 Dispositif de surveillance d'environnement
PCT/CN2021/105315 WO2022105257A1 (fr) 2020-11-21 2021-07-08 Appareil de surveillance de gaz d'échappement

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