32 results about "Automobile emission" patented technology

The invention discloses an urban road mobile source intelligent monitoring method and system based on multi-source data coupling, and relates to the technical field of environment monitoring and intelligent traffic. Utilizing a machine learning algorithm to construct a pollutant emission, carbon emission and energy consumption prediction model; acquiring vehicle inventory data in the city, and calculating the pollutant emission, energy consumption and carbon emission of the whole city; the method comprises the following steps of: constructing a dynamic distribution diagram of automobile emission in a city by using real-time position data of vehicles and urban road network information, introducing an atmospheric diffusion model, simulating pollutant migration by combining urban geographic information and environmental data, comparing and verifying a simulated migration result with actually measured data of a national control site, and optimizing parameters of the atmospheric diffusion model; and storing the result into a real-time database, and displaying the pollutant distribution, emission, energy consumption and carbon emission of the urban road network in real time through a visual interface. According to the invention, the temporal-spatial resolution and prediction precision of data are effectively improved.

An automobile emission detection device disclosed by the present invention comprises a circular plate, a cylindrical sleeve penetrates through the circular plate and is rotatably connected with the circular plate through a fixed shaft, the inner wall of one end of the cylindrical sleeve is rotatably connected with a connecting pipe connected with an automobile exhaust pipe, and rectangular through grooves are symmetrically formed in the two ends of the connecting pipe. The inner walls of the rectangular through grooves are movably connected with first L-shaped rods conducting horizontal reciprocating motion, the ends, away from the connecting pipe, of the first L-shaped rods are fixedly connected with the circular plate, and the ends, away from the circular plate, of the first L-shaped rods are fixedly connected with arc-shaped plates matched with the inner wall of the connecting pipe. Connecting rods are fixedly connected to the opposite faces of the two arc-shaped plates, first cylindrical rods are fixedly connected to the opposite faces of the connecting rods, and a gas detector for detecting automobile exhaust is fixedly connected to one connecting rod. The automobile exhaust filtering device has the advantages that the automobile exhaust is filtered, and the air quality is further improved.

The present invention relates to the technical field of automobile emissions, and provides a method for designing the volume of a carbon canister. The method specifically includes the following steps: S1. Determine the fuel vapor θ generated by the fuel tank where the carbon canister is located per unit time; S2. Determine the ratio of BAX1500 type activated carbon and BAX1100 type activated carbon, and then calculate the volume V<supgt;*< / supgt;<subgt;activated carbon< / subgt; of the activated carbon, that is, the volume of the carbon canister; S3. Based on the aspect ratio of the carbon canister, correct the volume V<supgt;*< / supgt;<subgt;activated carbon< / subgt> of the current carbon canister, and the corrected volume V<subgt;activated carbon< / subgt> of the carbon canister is the final volume of the carbon canister. By optimizing the ratio of BAX1500 type activated carbon and BAX1100 type activated carbon, the present invention makes the use cost of the carbon canister as small as possible under the conditions of meeting the adsorption requirements of the fuel tank and the volume constraint of the carbon canister, and comprehensively considers the performance, volume and use cost of the carbon canister.

The application discloses a kind of carbon tank failure mode mining systems based on big data, the present application relates to automobile emission control technical field, including: three-domain fusion perception layer, for obtaining the multi-source data of carbon tank in the running process, and the multi-source data is uniformly encoded, constructs the three-domain fusion feature space of the physical structure parameter of carbon tank, chemical adsorption characteristic and real-time operation condition.The carbon tank failure mode mining system based on big data, through multistage collaborative screening and evolution type feedback cycle verification framework, without increasing hardware cost, significantly improve the accuracy and early warning capability of carbon tank fault diagnosis, can effectively identify early weak fault characteristics that traditional method is difficult to capture, and accurately predict fault evolution path and remaining useful life.Overall, it realizes the upgrade of carbon tank fault from passive response maintenance to active predictive maintenance, reduces the risk of emission exceeding standard and vehicle operation failure rate caused by carbon tank failure.

The invention relates to the technical field of oil quality analysis, and particularly discloses an oil quality analysis method based on automobile emission data, which comprises the following steps: S1, setting a driving state, acquiring emission data of standard fuel oil, and establishing a standard data set; s2, the vehicle driving process is divided into time periods before and after refueling, the speed of the time periods after refueling is monitored in real time, a change curve is generated, and the standard total emission amount and the oil quality coefficient are obtained according to the standard data set; s3, same speed monitoring and emission amount calculation are carried out in the previous time period, and a first coefficient is obtained; meanwhile, measuring the post-period emission amount, and calculating a second coefficient; s4, combining the two coefficients to obtain an actual oil product coefficient, and comparing the actual oil product coefficient with a standard oil product quality coefficient so as to judge whether the oil product has a quality problem or not; the fuel oil quality is effectively monitored and guaranteed, and the method has important significance on vehicle performance maintenance, emission control and environmental protection.

The invention discloses a dew point control method and system for an exhaust gas sensor and a vehicle, and relates to the technical field of automobile emission control. The method provided by the invention comprises the following steps: when the internal combustion engine enters a shutdown stage from an operation stage, selectively executing a control action based on a dew point passing state of an exhaust gas sensor before shutdown: if the dew point passing state is not completed, determining a heat compensation value for subsequent heating; if the dew point passing is completed, shutdown heating is carried out on the sensor in the shutdown stage for heat preservation, physical parameters indicating the condensation risk are monitored, and when the parameters meet reset conditions, the dew point passing state is reset to be uncompleted. By introducing the dynamic control logic combining heat compensation, shutdown heat preservation and risk reset across the start-stop cycle, the waste gas sensor can be effectively prevented from being damaged due to condensation under various working conditions, the reliability of the emission system is remarkably improved, and the service life of the sensor is remarkably prolonged.

The application discloses a full-temperature emission prediction method and device, relates to the technical field of automobile emission, and comprises the following steps: obtaining each pollutant emission test data of each vehicle of the same family as a test vehicle under different environmental temperatures, so as to generate full-temperature emission curves of each pollutant of each vehicle; after normalization processing of the full-temperature emission curves of each vehicle under each pollutant at a preselected environmental temperature, the full-temperature emission curves are collected to construct a full-temperature emission prediction model of each pollutant; inputting the pollutant emission test data of the test vehicle at the preselected environmental temperature into the full-temperature emission prediction model of the pollutant, and outputting the maximum emission value and the minimum emission value of the pollutant under other environmental temperatures; when the maximum emission value under any environmental temperature is less than or equal to an emission limit value, it is judged that the emission is qualified; and when the minimum emission value under any environmental temperature is greater than the emission limit value, it is judged that the emission is unqualified. According to the application, the test frequency can be reduced, and the test cost can be reduced.

The invention relates to a plateau light automobile emission data analysis and research method, which comprises the following steps of collecting emission data of a light automobile in a plateau environment, cleaning the collected data, and combining meteorological data of a plateau area with the emission data to form a comprehensive data set; a machine learning algorithm is adopted to research an influence mechanism of plateau environment factors on emission characteristics, and key influence factors are identified; based on the comprehensive data set, utilizing clustering analysis and association rule mining technologies to identify a typical emission mode of the lightweight car in the plateau environment; according to an emission characteristic analysis result, improving a traditional emission prediction model, introducing a plateau environment factor as an input variable, and constructing an emission prediction model suitable for the plateau environment; the model is trained and verified by using actual measurement data in a plateau environment, model parameters are adjusted, the adaptability of the model in different plateau areas and different vehicle types is evaluated, and the generalization ability of the model is ensured.

The utility model discloses a stainless steel connecting pipe for the emission test of a lightweight car, which comprises an emission mechanism, a connecting mechanism and an antiskid mechanism, the emission mechanism comprises a pipe body, a first emission groove is arranged in the pipe body, one end of the pipe body is fixedly connected with an expansion cylinder, a second emission groove is arranged in the expansion cylinder, and the expansion cylinder is fixedly connected with the connecting mechanism. The other end of the pipe body is fixedly connected with a conical pipe, and a third discharging groove is formed in the conical pipe. According to the stainless steel connecting pipe for the emission test of the light-duty car, the emission mechanism is arranged, and the port of the expanding cylinder at the left side end is connected with a pipeline of tail gas collecting and analyzing equipment by utilizing the connecting mechanism, so that the pipe body, the expanding cylinder and the conical pipe in the stainless steel connecting pipe for the emission test of the light-duty car are all made of stainless steel; normal connection of the automobile exhaust pipe and the tail gas collecting and analyzing equipment can be guaranteed, particulate matter cannot be generated in a high-temperature environment, the problem that particulate matter is generated in the connecting pipe in the high-temperature environment can be solved, and the accuracy of an automobile emission test is improved.

The invention provides an automobile portable emission testing system, belongs to the technical field of automobile exhaust testing, and solves the technical problems that an existing emission testing system is large in size, not portable, low in testing efficiency, poor in vehicle adaptability and the like. Comprising a mounting bearing frame, a wireless communication module, a cloud server, a system controller and an OBD adapter, the system controller and the OBD adapter are placed in a compartment, a plurality of folding supporting wheels are arranged on the lower side of the mounting bearing frame, a plurality of positioning locking sliding seats are arranged on the front side of the mounting bearing frame, trailer connecting pieces are arranged on the positioning locking sliding seats, and an environment monitoring mechanism is arranged on the mounting bearing frame. A plurality of auxiliary connecting pieces are arranged on the front side of the upper end of the mounting bearing frame, a tail gas detection module is arranged on the rear side of the upper end of the mounting bearing frame, a tail gas collection mechanism is arranged on the front side of the lower end of the mounting bearing frame, and a tail gas flow evaluation mechanism is arranged on the rear side of the lower end of the mounting bearing frame. The system adopts an integrated framework, is highly integrated and portable, is high in vehicle adaptability, and can stably and efficiently carry out emission test evaluation.

1. Name of the product in this design: Teaching aid (automobile emission). 2. Purpose of this design: As an educational tool to demonstrate vehicle emissions. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. The bottom surface of this product is a part that is not easily seen or cannot be seen during use, so the bottom view is omitted. 6. Design 1 is designated as the basic design.

The application relates to the field of automobile emission control technology, in particular to a desulfurization method, equipment, vehicle and medium of an SCR system, which comprises the following steps: in the process of vehicle driving, when it is determined that the conversion efficiency of nitrogen oxides of a selective catalytic reduction (SCR) system is not greater than an efficiency threshold value, the urea injection amount is judged; if the urea injection amount is not greater than a urea injection threshold value under the current engine working condition, at least one regeneration is carried out through a particulate matter trap. Through the method, the phenomenon of "sulfur poisoning" can be accurately diagnosed, and the problem that the conversion efficiency of the SCR system cannot be improved after regeneration is avoided.

The invention relates to the technical field of automobile emission testing, in particular to a performance evaluation method and device for a particulate matter trap, a vehicle and a storage medium, and the method comprises the steps: obtaining the state of a vehicle-mounted diagnostic system fault indicator lamp of a current to-be-tested vehicle; if the vehicle-mounted diagnosis system fault indicating lamp state is in an off state, sampling tail gas of the current to-be-tested vehicle for multiple times based on preset particle emission testing equipment to obtain multiple sampling results; and calculating an arithmetic mean value of the plurality of sampling results, and obtaining a performance evaluation result of the particulate matter trap of the current to-be-tested vehicle according to an interval in which the arithmetic mean value is located. Therefore, the problems of inaccurate performance evaluation of the particulate matter trap and the like caused by low test precision and tedious test process of a test method in related technologies are solved, and the performance of the vehicle-mounted particulate matter trap is accurately and efficiently evaluated under the condition that the particulate matter trap is not disassembled.

The utility model provides an automobile tail pipe transition device for automobile exhaust emission testing and an automobile exhaust emission testing system, and belongs to the technical field of automobile exhaust detection. The automobile tail pipe transition device for the automobile exhaust emission test comprises a metal transition pipe, a first sealing rubber pipe and a second sealing rubber pipe, one end of the metal transition pipe is an air inlet end, and the other end is an exhaust end; the air inlet end is connected with one end of the first sealing rubber pipe; and the exhaust end is connected with one end of the second sealing rubber pipe. Compared with a traditional silica gel transition connecting pipe, the transition pipe made of the metal material has the advantages that the problems of volatilization, decomposition, bubbling, carbonization and the like at high temperature are solved, additional gas and particulate matter are prevented from entering an emission analyzer, and therefore the accuracy of automobile emission test results is remarkably improved.

The invention relates to the technical field of automobile emission testing, in particular to a flowing type braking particulate matter measuring system and method based on an inertia test bed method, and the method comprises the steps that a cooling air conditioning system provides filtered cooling air; the brake test cabin is provided with a brake, the brake test cabin is arranged on the inertia test bench, and the inertia test bench drives the brake to rotate; the brake test cabin is communicated with the cooling air conditioning system through a pipeline to form a measuring pipeline; a wind speed sensor is arranged at the inlet of the brake test cabin to measure the wind speed at the inlet of the brake test cabin; the measuring pipeline is provided with a monitoring unit for monitoring environment information of the measuring pipeline, and the particulate matter sampling and analyzing equipment is used for collecting brake wear particulate matters and sample gas in the measuring pipeline and analyzing the quantity and the quality of the brake wear particulate matters. According to the scheme, flow type braking particulate matter measurement is carried out, the test authenticity can be improved, external interference is avoided, the aerosol mixing uniformity is guaranteed, and the measurement accuracy is improved.

The invention relates to the field of automobile emission detection, in particular to a loading monitoring method and system for a motor vehicle pollutant emission detection dynamometer, and the method comprises the steps: determining an eddy current machine of the motor vehicle emission detection dynamometer, and collecting a plurality of working currents of the eddy current machine under a preset calibration working condition through a non-contact collection device according to a monitoring instruction; obtaining an initial current value and a corresponding initial loading force, constructing an initial current loading force according to the initial current value and the corresponding initial loading force, querying a loading force corresponding to each working current, and constructing a plurality of groups of working current loading force pairs; constructing a current loading force relation model based on the multiple groups of working current loading force pairs and the initial current loading force pairs, and obtaining a real-time loading force curve of the to-be-detected motor vehicle; and acquiring the rated load force of the preset network platform and the actually measured load force corresponding to the real-time load force curve, comparing to obtain a result, and verifying whether the pollutant emission of the to-be-detected motor vehicle is compliant or not. According to the invention, the reliability of motor vehicle pollutant emission inspection is improved.

The utility model relates to the technical field of automobile emission, in particular to a particle catcher shell which comprises a first shell body and a second shell body, the first shell body and the second shell body are symmetrical, a particle catcher body is embedded between the first shell body and the second shell body in a matched mode, and a fastening assembly is arranged between the first shell body and the second shell body. The sides, close to the particle catcher body, of the first shell and the second shell are each provided with a plurality of exhaust channels, ceramic filter elements are embedded into the exhaust channels in a matched mode, filter channels are formed in the ceramic filter elements in a penetrating mode, and a plurality of honeycomb filter holes are formed in the outer walls of the ceramic filter elements in a penetrating mode.

The present application belongs to the field of automobile and engine emission test technology, and specifically relates to a method for weighing filter paper for sampling particulate matter in automobile emission test, first inputting the number of test filter papers, the environmental control monitoring module maintains the monitoring of the temperature, humidity and pressure of the weighing environment, controlling the filter paper weighing module to drop the filter paper to the lifting tray for weighing 3 times, the vessel cover opening and closing mechanism opens and closes the vessel, the lifting tray puts the filter paper into the vessel, the data management and processing module records the data, and the vessel is transported to the waiting area; after the test, the vessel is transported to the static area and the waiting area in turn; then the vessel cover opening and closing mechanism pours the filter paper in the waiting area into the lifting tray for weighing, and then puts the test filter paper from the lifting tray into a covered waste box, and the idle vessel is transported to the storage area, and the host control module checks and exports the final data. The present application standardizes the management of covered vessels, saves filter paper weighing time, reduces personnel calculation errors and weighing environmental pollution, improves the accuracy and reliability of filter paper weight data, and speeds up detection efficiency.

The invention relates to an anti-cheating method and system for vehicle emission detection, and relates to the technical field of vehicle emission detection.The method comprises the steps that when a vehicle is in an implicit state, terminal resistance and a first waveform of a CAN bus are collected; injecting a micro-current into the CAN bus, and collecting the voltage to ground of an H pin, the voltage to ground of an L pin and a second waveform of the CAN bus; a bus terminal resistor is disconnected, a pulse signal is injected into the CAN bus, and a reflection waveform is collected; respectively comparing the terminal resistance, the H voltage to ground, the L voltage to ground and the reflection waveform with respective set standards, and comparing the first waveform with the second waveform; and if the terminal resistance, the H voltage to ground, the L voltage to ground and the reflection waveform do not conform to respective set standards and the second waveform has signal attenuation and distortion compared with the first waveform, judging that a cheating device module exists. By measuring and comparing relevant parameters, the difference between the to-be-measured vehicle data and the normal vehicle data is observed, the operation is simple, convenient and rapid, and the time cost is saved.

The present application discloses an optimization method, device, equipment and storage medium for an automobile emission control system. The method calculates the steady-state error of the vehicle's front oxygen sensor and the rear oxygen voltage deviation of the rear oxygen sensor based on the target rear oxygen voltage and the actual rear oxygen voltage, and when the numerical states of the rear oxygen voltage deviation and the steady-state error are the same, the vehicle's rear oxygen self-learning function is called to determine the correction strategy of the front oxygen sensor based on the steady-state error, and then the parameters of the front oxygen sensor are corrected in the correction direction indicated by the correction strategy and according to the correction amplitude indicated by the correction strategy, so as to optimize the vehicle's emission control system. Wherein, the numerical state is a positive numerical state or a negative numerical state, and the front oxygen sensor exists in the vehicle's emission control system. The embodiment of the present application can accurately correct the parameter offset of the front oxygen sensor, thereby achieving precise optimization of the emission control system in the vehicle.

An automobile emission detection task generation, execution and error-proofing system and device, and a storage medium, comprising: an SCF system configured to generate a production plan with an emission detection task according to received marketing demand information; the MOM system is used for receiving the detection parameters, sent by the BOM system, of the vehicle type to be detected, marking a target vehicle in the received production plan with the emission detection task, recording the marked target vehicle information and generating the marked production plan with the emission detection task; and the equipment control system is used for acquiring an emission detection result according to the detection parameters of the to-be-detected vehicle type of the target vehicle in the received marked production plan with the emission detection task after scanning, so that the MOM system performs leakage-proof verification according to the emission detection result and the marked target vehicle information. The technical problem that compliance risks exist due to the fact that a manual mode is adopted in the prior art is solved.

The utility model discloses a hot end system product assembly with a back pressure self-adaptive adjusting and flow mixing function, and belongs to the technical field of automobile emission hot end products. One ends of the four exhaust manifolds are dispersed and connected with the air inlet flange, the other ends of the four exhaust manifolds are gathered and connected with the front end cone of the catalyst assembly through the connecting flange assembly, a communicating hole is formed in the connecting position of the front end cone and the exhaust manifolds, a flow guide valve is installed on the communicating hole, and an oxygen sensor installation base is arranged on the front end cone. According to the utility model, a clamshell type structure commonly used in the industry is innovatively optimized into an independent four-exhaust-pipe design, so that the problem that the performance of an engine is reduced due to mixed flow is fundamentally avoided. A backpressure self-adaptive adjusting mixed flow blade valve structure is originally introduced at the front end cone gathering position. The structure has the following advantages that the airflow concentration phenomenon can be effectively dispersed, the opening and closing amount can be automatically adjusted through airflow pressure, and airflow distribution can be intelligently adjusted and controlled.

The present invention discloses a method for detecting three-way catalytic converters of gasoline vehicles based on secondary catalysis of exhaust gas. During the whole vehicle emission detection process of gasoline vehicles, a small amount of exhaust gas is diverted from the exhaust tail pipe outlet of the vehicle, and the diverted exhaust gas is heated by an electric heater, and then subjected to secondary catalysis by a reference catalyst, and the exhaust gas composition and concentration after the secondary catalysis are detected by emission analysis equipment. If the exhaust gas emissions after the secondary catalysis still do not meet the emission regulatory limit requirements, it is determined that the original exhaust conditions of the engine do not meet the working requirements of the catalyst. The present invention can identify whether the excessive emissions of the whole vehicle are caused by the three-way catalytic converter. The method is simple and the detection efficiency is high, which provides technical method support for the implementation of the automobile emission inspection and maintenance (IM) system. The present invention is also suitable for secondary detection of exhaust gas of vehicles burning alternative fuels such as CNG and LPG.

The invention discloses an automobile emission monitoring method and system based on multi-source emission data fusion, and relates to the technical field of motor vehicle exhaust emission monitoring, and the method comprises the steps: carrying out the multi-source data fusion according to the road surface data, meteorological data, driving state and engine operation state of historical vehicles, and then constructing an emission simulation model; the model outputs a qualified value range of each exhaust gas content in the exhaust emission amount; the actual measurement value of each gas content in the tail gas emission amount under the current actual condition is collected in real time, and is compared with the qualified value range of each exhaust gas content in the tail gas emission amount output according to the emission simulation model for analysis, whether each exhaust gas content is qualified is judged, and if an unqualified or abnormal item exists, the tail gas emission amount is judged to be qualified. Labeling the text description and converting the text description into a structured text description; according to the method, an emission system causal graph is constructed, corresponding abnormal reasons are positioned in the emission system causal graph according to structured text description, potential faults possibly existing in the vehicle are analyzed, the monitoring accuracy is improved, and the system false alarm rate is reduced.

The present application relates to the technical field of automobile emission detection, and particularly relates to a hydrocarbon mass testing method and a methanol fuel automobile carbon canister emission testing method. The present application connects the atmospheric port of the carbon canister to a micro closed chamber, continuously measures the total hydrocarbon in the closed chamber using FID, and synchronously measures the methanol concentration in the same gas using FTIR. Based on the measurement results of FID and FTIR, the signal separation of non-methanol hydrocarbons and methanol is realized, the problem that the FID response is inaccurate and the alcohol and hydrocarbon emissions cannot be distinguished in the prior art is solved, and the accuracy and reliability of the methanol fuel automobile evaporation pollutant emission testing are improved.

The invention relates to the technical field of automobile emission testing, in particular to a test cycle construction method, device and equipment for brake emission of a heavy duty vehicle and a medium, and the method comprises the steps: obtaining a target vehicle type of a to-be-tested heavy duty vehicle; determining an initial deceleration threshold curve of the to-be-tested heavy duty vehicle based on the target vehicle model; acquiring actual operation data of the heavy duty vehicle of the target vehicle model under actual road operation conditions, and calculating probability distribution of braking characteristic parameters of the heavy duty vehicle to be tested according to the initial deceleration threshold curve and the actual operation data of the target vehicle model; and according to the probability distribution, determining a plurality of target travel intervals from the sample operation data of the heavy vehicle of the target vehicle type, and according to the plurality of target travel intervals, generating a test cycle of brake emission of the to-be-tested heavy vehicle. Therefore, the problems that the brake emission test cycle of the heavy-duty vehicle cannot reflect the actual brake emission of the vehicle, the test accuracy is low and the like in the related technology are solved.

The utility model discloses a special tool for a lifting lug of an automobile silencer, and belongs to the technical field of whole automobile test. The lead screw supporting plate and the baffle are oppositely fixed to the two ends of the base to form a U-shaped structure, the lead screw is rotationally installed on the lead screw supporting plate, one end of the lead screw faces the baffle, a hexagonal nut is arranged at the other end of the lead screw, and the lead screw is matched with the baffle to detach the automobile silencer from the automobile silencer fixing lifting hook. According to the utility model, the problems that the labor intensity of a dismounting operator for mounting the silencer on the vehicle is high and multiple operators are required to cooperate for operation before the national sixth finished automobile emission experiment is carried out, the danger that the operation space is narrow and the operator is bumped and hurt is avoided, the rubber lifting lug of the silencer is prevented from being damaged by violent dismounting, and the working efficiency is improved. The mechanism provided by the utility model completely realizes independent and safe operation by one operator, is simple in structure and easy to operate, is convenient to mount and dismount, reduces the labor intensity, greatly improves the test efficiency, and is good in reliability and strong in universality.

The invention relates to the technical field of automobile emission monitoring sensors, in particular to a low-carbon emission automobile intake particulate matter on-line monitoring sensor with a self-cleaning function, which comprises a probe assembly, a signal transmission line, an intake signal analysis assembly and a connecting plug. The probe assembly is combined with an alloy insertion core through a ceramic chip, self-cleaning of an optical window is achieved through heating of a platinum resistor, and the temperature is accurately controlled through a fuzzy PID algorithm. The front end of the probe is nested with a nano-zirconia sleeve porcelain rod, so that heat transfer is blocked, and the optical fiber performance is protected. The sensor mounting base is in threaded connection with the probe assembly, thereby facilitating disassembly and cleaning. Through the structure optimization and heating control technology, the pollution problem of the optical window is solved, the stability of the sensor in a high-temperature environment is improved, and the service life of the sensor in the high-temperature environment is prolonged.

The invention discloses an automobile emission pollutant analysis and detection device, and relates to the technical field of automobile exhaust detection, and the automobile emission pollutant analysis and detection device comprises a detector body; the side, away from the detector body, of the first conveying pipe is fixedly connected with a dilution assembly, the dilution assembly comprises a first connecting block, the first connecting block is fixedly connected with the first conveying pipe, the side, away from the first conveying pipe, of the first connecting block is fixedly connected with a uniform mixing chamber, and the middle of the upper end of the first connecting block is fixedly connected with a controller; the upper part of the connecting block I is symmetrically and fixedly connected with concentration detectors. The controller can control the air flow control valve to operate, then the air flow control valve can control the flow of air conveyed into an inner cavity of the uniform mixing chamber, the two concentration detectors are matched, the concentration of tail gas can be monitored, and therefore the concentration of the tail gas can be monitored according to the dilution proportion. The tail gas dilution precision of the dilution assembly is improved, so that the final detection precision can be improved, and the tail gas can be continuously diluted in the conveying path through the uniform mixing chamber.

The invention discloses an automobile exhaust and non-exhaust particulate matter detection system and method, and relates to the technical field of automobile exhaust detection, particulate matter samples comprise a first particulate matter sample, a second particulate matter sample and a third particulate matter sample which are completely identical; the system comprises a particle size analysis module used for analyzing the particle size of a first particulate matter sample to obtain the particle size distribution of the sample; the particle quantity counting module is used for counting the particle quantity of the second particle sample to obtain the sample particle quantity; the mass analysis module is used for counting the particle mass of the third particulate matter sample to obtain the sample particle mass; and the characteristic analysis module is used for obtaining the emission characteristics of the automobile in the preset time period based on the sample particle size distribution, the sample particle number and the sample particle mass. According to the invention, comprehensive automobile emission data can be obtained, and the research performance and accuracy of automobile emission characteristics are effectively improved.