Clean fuel engine emissions test apparatus, method and engine

Abstract

This application provides a testing apparatus, method, and engine for clean fuel engine emissions, which can be widely applied in the field of automatic testing technology. The apparatus includes: a particulate generator for generating gaseous emissions; the particulate generator includes a combustion chamber, a clean fuel delivery unit, an air delivery unit, and an oil delivery unit; wherein the gaseous emissions are used to simulate emissions generated under clean fuel engine operating conditions; a steam generator for providing steam; a dilution channel for mixing the gaseous emissions and the steam; a particulate measuring device for measuring particulate data; and a control module for adjusting the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to generate a first mixed gas with a preset ratio input to the combustion chamber. This application tests clean fuel engine emissions based on humidity and emissions, which helps improve testing efficiency and accuracy.

Description

Technical Field

[0001] This application relates to the field of automatic detection technology, and more specifically, to a clean fuel engine emission testing device, method, and engine. Background Technology

[0002] As research into clean fuel engines deepens, the development of corresponding emission measurement devices becomes particularly important. Compared to diesel vehicles, natural gas engines use different fuels and have different combustion methods, resulting in significant differences in exhaust absolute humidity and oil consumption, which further affect the measurement of particulate matter in the exhaust.

[0003] In related technologies, particle number analyzers connect to sampling points via sampling probes. The sampling probes extract sample gas at the centerline of the exhaust pipe, and the particle number analyzer pre-processes the sample before measuring and reporting the particulate matter count. However, the sampling process for clean fuel engines is relatively complex during operation, resulting in low sample data volume, which affects further research on clean fuel engines and impacts the accuracy and efficiency of clean fuel engine emission testing. Summary of the Invention

[0004] The main objective of this application is to provide a clean fuel engine emission testing apparatus, method, and engine to at least solve the problem of low testing accuracy in existing clean fuel engine emission testing apparatuses.

[0005] To achieve the above objectives, according to one aspect of this application, a clean fuel engine emission testing apparatus is provided. The apparatus includes: a control module; a particulate generator connected to the control module for generating gaseous emissions; the particulate generator includes a combustion chamber and a clean fuel delivery unit, an air delivery unit, and an oil delivery unit connected to the combustion chamber; wherein the gaseous emissions are used to simulate emissions generated under clean fuel engine operating conditions; a steam generator connected to the control module for providing steam; and a dilution channel connected to both the steam generator and the particulate generator for mixing the gaseous emissions and the steam; and particulate matter... A particulate matter measuring device, connected to the dilution channel, is used to measure particulate data. A control module is connected to the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to adjust these units, generating a first mixed gas with a preset ratio input to the combustion chamber. The preset ratio is related to the operating conditions of the clean fuel engine. The control module is also connected to the particulate matter measuring device to adjust the steam generator to generate steam with a preset humidity. The particulate data is received, and the emissions from the clean fuel engine are tested based on the preset humidity and the particulate data. This application simulates emissions generated under clean fuel engine operating conditions using a particulate matter generator and adjusts humidity using a steam generator, testing the emissions based on humidity and emissions, thereby improving testing efficiency and accuracy.

[0006] Optionally, the particulate matter generator further includes a first flow controller and a second flow controller;

[0007] The clean fuel delivery unit is connected to the combustion chamber via the first flow controller, and the air delivery unit is connected to the combustion chamber via the second flow controller. The control module is connected to both the first flow controller and the second flow controller to adjust the flow rate of the clean fuel delivery unit via the first flow controller and the flow rate of the air delivery unit via the second flow controller.

[0008] Optionally, the device further includes a temperature detection unit, a humidity detection unit, and a pressure detection unit;

[0009] The temperature detection unit is used to detect the temperature at the inlet, outlet, and inside of the dilution channel; the humidity detection unit is used to detect the relative humidity at the inlet, outlet, and inside of the dilution channel; and the pressure detection unit is used to detect the pressure at the inlet, outlet, and inside of the dilution channel.

[0010] The temperature detection unit, the humidity detection unit, and the pressure detection unit are all connected to the control module.

[0011] Optionally, the device further includes a clean air delivery unit;

[0012] The clean air delivery unit is connected to the control module and is used to dilute the gas in the dilution channel;

[0013] The control module is used to: determine the absolute humidity based on the temperature, relative humidity, and pressure; determine the condensation index based on the absolute humidity; and dilute the gas in the dilution channel through the clean air delivery unit based on the condensation index.

[0014] Optionally, the oil delivery unit includes an oil injection assembly;

[0015] The oil injection assembly is connected to the combustion chamber via a metering assembly.

[0016] Optionally, the combustion chamber further includes an air-fuel ratio detection component;

[0017] The air-fuel ratio detection component is connected to the control module and is located at the outlet of the combustion chamber to collect the air-fuel ratio of the gas emissions.

[0018] The control module is used to adjust the clean fuel delivery unit, air delivery unit, and oil delivery unit according to the air-fuel ratio.

[0019] Optionally, the particulate matter measuring device includes a first measuring unit and a second measuring unit;

[0020] The first measuring unit is located before the dilution channel and is used to measure the first particle data of the gas before mixing; the second measuring unit is located after the dilution channel and is used to measure the second particle data of the gas after mixing.

[0021] According to another aspect of this application, a method for testing emissions from a clean fuel engine is provided, comprising:

[0022] Acquire characteristic data of emissions from clean fuel engines;

[0023] Based on the aforementioned characteristic data, the humidity range and particulate matter adjustment range are determined;

[0024] Based on the particulate matter adjustment range, a preset ratio is determined; based on the humidity range, a preset humidity is determined.

[0025] According to the preset ratio and preset humidity, a particulate matter generator and a water vapor generator are set up, and a clean fuel engine emission test device is built. Based on the built clean fuel engine emission test device, the emissions of the clean fuel engine are tested.

[0026] Optionally, the method further includes:

[0027] The temperature, relative humidity, and pressure of the mixed gas are obtained; the mixed gas consists of gaseous emissions from a particulate matter generator and water vapor from a water vapor generator.

[0028] Determine the saturated vapor pressure based on the stated temperature;

[0029] The absolute humidity is determined based on the saturated vapor pressure, the relative humidity, and the pressure.

[0030] The moisture content of air, the moisture content of gaseous emissions, and the moisture content of water vapor are collected, and the condensation index is determined based on the sum of the moisture content of air, the moisture content of gaseous emissions, and the moisture content of water vapor, combined with the absolute humidity.

[0031] The mixed gas is diluted according to the condensation index.

[0032] According to another aspect of this application, a clean fuel engine is provided, wherein the gas emissions are tested using the aforementioned clean fuel engine emission testing apparatus.

[0033] By applying the technical solution of this application, this application uses a particulate matter generator to simulate the emissions generated under the operating conditions of a clean fuel engine, and also uses a steam generator to adjust the humidity. Based on the humidity and emissions, the emissions of the clean fuel engine are tested, thereby improving the testing efficiency and accuracy. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 A schematic diagram of a clean fuel engine emissions testing apparatus provided in an embodiment of this application is shown.

[0036] Figure 2 A flowchart illustrating a testing method provided in one embodiment of this application is shown;

[0037] Figure 3 A flowchart illustrating a testing method provided according to another embodiment of this application is shown. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] The names involved in this application include:

[0042] Particulate matter (PM): All exhaust components that can be collected from diluted exhaust gas within a certain temperature range, mainly including carbon, condensed hydrocarbons, and sulfate hydrates. The temperature range can be from 42°C to 52°C.

[0043] Particle number PN: The total number of all particles larger than 23 nm in the diluted exhaust gas after volatile substances have been removed.

[0044] Natural gas engine particulate generator: A device that generates particulate matter (PN) through the combustion of methane (with a certain proportion of N2, etc.) and the quantitative mixing of engine oil;

[0045] Particulate matter number measurement device: The PN meter is mainly used to measure the number concentration of non-volatile solid particles in motor vehicle exhaust gas.

[0046] As described in the background section, in related technologies:

[0047] New energy fuel and traditional fuel engines use the same particulate matter number emission measurement standard. The technical approach is as follows: the PN analyzer is connected to the sampling point through a sampling probe. The sampling probe extracts sample gas at the centerline of the exhaust pipe. After pre-processing, the PN analyzer measures and reports the particulate matter number.

[0048] As research into clean fuel engines deepens, the development of corresponding emission measurement devices becomes particularly important. Compared to diesel vehicles, natural gas engines use different fuels and have different combustion methods, resulting in significant differences in exhaust absolute humidity and oil consumption, further affecting the measurement of particulate matter in the exhaust. Currently, existing measurement standards lack effective operational methods and devices to mitigate the impact of these factors on measurement results. Therefore, this invention is urgently needed to accurately measure and analyze the influence of these two key factors on particulate matter quantity, filling a gap in the research field of particulate matter quantity in natural gas engine exhaust.

[0049] To address the aforementioned issues, embodiments of this application provide a clean fuel engine emission testing device. This device simulates emissions generated during clean fuel engine operation using a particulate generator and adjusts humidity using a steam generator. The device tests clean fuel engine emissions based on humidity and emissions data, thereby improving testing efficiency and accuracy.

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0051] Figure 1 This is a schematic diagram of a clean fuel engine emissions testing apparatus according to an embodiment of this application. The clean fuel engine emissions testing apparatus includes:

[0052] The clean fuel engine emissions testing device includes:

[0053] Control module;

[0054] A particulate matter generator, connected to the control module, is used to generate gaseous emissions; the particulate matter generator includes a combustion chamber and a clean fuel delivery unit, an air delivery unit, and an oil delivery unit connected to the combustion chamber; wherein, the gaseous emissions are used to simulate emissions generated under clean fuel engine operation conditions;

[0055] A steam generator, connected to the control module, is used to provide steam.

[0056] A dilution channel, connected to both the steam generator and the particulate matter generator, is used to mix the gaseous emissions and the steam.

[0057] A particulate matter measuring device, connected to the dilution channel, is used to measure particulate data;

[0058] The control module is connected to the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to adjust the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to generate a first mixed gas with a preset ratio that is input into the combustion chamber; wherein, the preset ratio is related to the operating conditions of the clean fuel engine;

[0059] The control module is connected to the particulate matter measuring device to adjust the water vapor generator to produce water vapor with a preset humidity; it receives the particulate data and tests the emissions of the clean fuel engine based on the preset humidity and the particulate data.

[0060] Reference Figure 1 As shown, the control and measurement system is the control module in this application. Natural gas, fresh air, engine oil, and the combustion chamber are the particulate matter generator in this application. The clean fuel in this application can be natural gas or other gases. The steam generating device is the steam generator. The CVS channel is the dilution channel. The particulate number measuring device is the particulate matter measuring device. Natural gas is the clean fuel delivery unit, fresh air is the air delivery unit, and engine oil is the engine oil delivery unit. In this application, the clean fuel delivery unit, air delivery unit, and engine oil delivery unit are respectively connected to the combustion chamber. This application determines the preset ratio of the gas delivered by each delivery unit based on the emissions generated by the actual operation of the clean fuel engine, so as to simulate the gas emissions of the clean fuel engine. The steam generator is used to generate steam to adjust the humidity of the gas in the dilution channel. The dilution channel is used to detect the gas emissions of the clean fuel engine, and the particulate matter measuring device detects the particulate data. In some embodiments, the particulate data can be the number of particles. This application realizes the testing of the gas emissions of the clean fuel engine by detecting the particulate data in the dilution channel, and determines the relationship between gas emissions and steam / humidity.

[0061] Optionally, the particulate matter generator further includes a first flow controller and a second flow controller;

[0062] The clean fuel delivery unit is connected to the combustion chamber via the first flow controller, and the air delivery unit is connected to the combustion chamber via the second flow controller. The control module is connected to both the first flow controller and the second flow controller to adjust the flow rate of the clean fuel delivery unit via the first flow controller and the flow rate of the air delivery unit via the second flow controller.

[0063] Figure 1The MFC between the natural gas and the combustion chamber is the first flow controller in this application, and the MFC between the fresh air and the combustion chamber is the second flow controller in this application. This application uses a control module to adjust the first and second flow controllers to regulate the flow rates of the clean fuel delivery unit and the air unit, thereby achieving a preset ratio based on the flow rate adjustment. In some embodiments, the first and second flow controllers can be flow regulating valves or switches, and this application does not limit the specific implementation of the flow controllers.

[0064] Optionally, the device also includes a temperature detection unit, a humidity detection unit, and a pressure detection unit;

[0065] The temperature detection unit is used to detect the temperature at the inlet, outlet, and inside of the dilution channel; the humidity detection unit is used to detect the relative humidity at the inlet, outlet, and inside of the dilution channel; and the pressure detection unit is used to detect the pressure at the inlet, outlet, and inside of the dilution channel.

[0066] The temperature detection unit, humidity detection unit, and pressure detection unit are all connected to the control module.

[0067] This application also includes a multi-parameter detection unit, comprising a temperature detection unit, a humidity detection unit, and a pressure detection unit, such as... Figure 1 middle The installation locations of the sensors shown are for multi-parameter measurements performed before the gaseous mixture of gaseous emissions and water vapor, before the dilution channel, inside the dilution channel, and at the outlet of the dilution channel.

[0068] Optionally, the device also includes a clean air delivery unit;

[0069] A clean air delivery unit, connected to the control module, is used to dilute the gas in the dilution channel;

[0070] The control module is used to: determine the absolute humidity based on temperature, relative humidity, and pressure; determine the condensation index based on the absolute humidity; and dilute the gas in the dilution channel through the clean air delivery unit based on the condensation index.

[0071] This application also includes a clean air delivery unit. Clean air refers to air from which the particulate matter to be measured has been removed. The clean air delivery unit provides clean air to dilute the mixed gas in the dilution channel. (Refer to...) Figure 1In one embodiment, the clean air delivery unit is connected to the output of the water vapor generating device; in other embodiments, the clean air delivery unit may also be connected to the inlet of the dilution channel. This application does not limit the specific connection location of the clean air delivery unit. Based on measured parameters, this application determines the absolute humidity, and then determines the condensation index. The dilution of the gas in the dilution channel is adjusted according to the condensation index; alternatively, the humidity environment can be adjusted based on the condensation index. This application achieves multi-angle adjustment through multiple parameters to better test and experiment with the gas emissions of clean fuel engines.

[0072] Optionally, the oil delivery unit includes an oil injection assembly;

[0073] The oil injection assembly is connected to the combustion chamber via a metering assembly.

[0074] Optionally, the combustion chamber also includes an air-fuel ratio detection component;

[0075] The air-fuel ratio detection component is connected to the control module and is located at the outlet of the combustion chamber to collect the air-fuel ratio of the gas emissions.

[0076] The control module is used to adjust the clean fuel delivery unit, air delivery unit, and oil delivery unit according to the air-fuel ratio.

[0077] This application can determine the accuracy of the preset ratio using an air-fuel ratio detection component, and update the preset ratio based on the accuracy to better conduct tests and improve testing efficiency.

[0078] Optionally, the particulate matter measuring device includes a first measuring unit and a second measuring unit;

[0079] The first measuring unit is located before the dilution channel and is used to measure the first particle data of the gas before mixing; the second measuring unit is located after the dilution channel and is used to measure the second particle data of the gas after mixing.

[0080] Both the first and second measurement units are connected to the control module, which is used to determine the relationship between gaseous emissions and humidity from the clean fuel engine based on the first and second particle data.

[0081] This application determines the impact of humidity on emissions from clean fuel engines by comparing and analyzing first and second particle data; furthermore, by adjusting the preset humidity through comparative analysis, the impact is further tested.

[0082] Reference Figure 2 According to another aspect of this application, a method for testing emissions from a clean fuel engine is provided, comprising:

[0083] Step S100: Obtain characteristic data of clean fuel engine emissions;

[0084] Step S200: Determine the humidity range and particulate matter adjustment range based on the feature data;

[0085] Step S300: Determine the preset ratio based on the particulate matter adjustment range; determine the preset humidity based on the humidity range;

[0086] Step S400: According to the preset ratio and preset humidity, set up the particulate matter generator and the water vapor generator, and build a clean fuel engine emission test device. Based on the built clean fuel engine emission test device, test the clean fuel engine emissions.

[0087] The feature data in this application are real gaseous emission data. By adjusting the corresponding range, a preset ratio is determined, and then a clean fuel engine emission test device is built to simulate real engine emissions. The built device simulates real conditions, which facilitates data collection and testing, and improves testing efficiency and accuracy.

[0088] Optionally, the method further includes:

[0089] The temperature, relative humidity, and pressure of the mixed gas are obtained; the mixed gas consists of gaseous emissions from the particulate matter generator and water vapor from the water vapor generator.

[0090] Determine the saturated vapor pressure based on the temperature;

[0091] Determine absolute humidity based on saturated vapor pressure, relative humidity, and pressure;

[0092] The moisture content of air, gaseous emissions, and water vapor is collected, and the condensation index is determined based on the sum of these three moisture contents, combined with absolute humidity.

[0093] The mixed gas is diluted based on the condensation index.

[0094] This application can determine the condensation coefficient by detecting the parameters of the gas before the dilution channel or by detecting the parameters of the gas inside the dilution channel, without limiting the location of the parameters for the condensation coefficient.

[0095] According to another aspect of this application, a clean fuel engine is provided, wherein the gas emissions are tested using the aforementioned clean fuel engine emission testing apparatus.

[0096] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the clean fuel engine emission test device of this application will be described in detail below with reference to specific embodiments.

[0097] This proposal provides a device and control method for measuring particulate matter number (PN). The purpose of this invention is to explore the influence of humidity on PN at different levels, and it is particularly applicable to the analysis of factors affecting PN in natural gas engine exhaust. Through experimental research and literature review, it has been found that the oil consumption and absolute water content in the exhaust of natural gas engines have a significant impact on PN. In order to qualitatively study the emission characteristics of PN in natural gas engine emissions, this invention proposes a method that can quantitatively emit PN and increase the water content in the exhaust to study the factors affecting PN.

[0098] This invention provides an experimental apparatus and method for studying the influencing factors of PN in natural gas engines, such as... Figure 1 As shown, the device includes a particulate generator (consisting of natural gas, fresh air, oil injection device, and combustion chamber), a steam generator, a connecting pipe, a sensing device, a control / measurement system, and a particulate matter measuring device.

[0099] The particulate generator consists of natural gas, fresh air, an oil injection device, a flow sensor, an air-fuel ratio sensor 11, and an oil quantity metering sensor. These components are mixed and injected into the combustion chamber according to requirements to simulate the operating conditions of a natural gas engine and generate particulate matter (PN).

[0100] The two gas streams from the particle generator and the steam generator mix and enter the CVS channel. Temperature, pressure, relative humidity, and dew point sensors are connected to the positions before and after mixing, as well as at the positions before, after, and in the middle of the CVS channel. These sensors are used to calculate the absolute humidity in the exhaust gas, characterizing the absolute humidity of the entire pipeline system, and simultaneously monitoring for condensation. The formulas for calculating saturated vapor pressure and absolute humidity are provided.

[0101] Saturated vapor pressure (kPa): ;

[0102] Absolute humidity (kg / kg): ;

[0103] in: t For gas temperature, Relative humidity, P For total pressure, Ps Saturated vapor pressure.

[0104] Characterization of condensation degree:

[0105] (Air moisture content + Moisture content produced by combustion + Moisture content of water vapor entering) / Ha≥1.

[0106] It is understandable that the saturated vapor pressure formula can be determined by the relationship between the saturated vapor pressure of a pure substance and temperature, such as... Then, through empirical adjustments, determine... ABC The specific values. Different values ​​are determined based on different temperatures. ABC The value is used to obtain the accurate saturated vapor pressure. In one embodiment, as shown in the above formula, A Take 18.5916, B Take 3991.11, C The value of 233.84 is merely an example; those skilled in the art can set appropriate values ​​according to actual needs. ABC The numerical values ​​are not specifically limited in this application. The overall coefficients in the formula are unit conversion factors, which should be determined by those skilled in the art based on the specific scenario. The formula for absolute humidity is determined using the ideal gas law and humid air.

[0107] This application reduces the exhaust dew point temperature through dilution, ensuring that water vapor does not condense in the sampling system and analytical instruments, thereby avoiding the loss of the particulate matter to be detected and ensuring the accuracy of the measurement.

[0108] The entire pipeline measurement system has PN measurement points installed before and after mixing, and before and after CVS, and the PN measurement equipment is used to collect and characterize the number concentration of particulate matter.

[0109] Both the water vapor generator and the clean air port are equipped with HEPA filters.

[0110] The sensors in the entire testing system are connected to the sensing device, and the control system controls and processes the data in real time.

[0111] A device and control scheme for investigating the impact of environmental measurement on particulate matter emissions from natural gas engines, with reference to... Figure 3 It includes the following steps:

[0112] In the experiment studying the factors affecting particulate matter number, the particulate matter generator can produce different levels of particulate matter number after the combustion of different natural gas components and engine oil, and the water vapor generator produces water vapor. The two mix to form different combinations of absolute humidity and original exhaust particulate matter number. The entire sensing device and particulate matter measuring device can monitor and adjust the absolute humidity and particulate matter number in the extended exhaust gas after mixing in real time before and after mixing.

[0113] The above steps are used to obtain data on the impact of different particulate matter quantities under different absolute humidity conditions.

[0114] The method of the present invention includes the following steps: acquiring engine exhaust characteristic data; the characteristic data includes at least exhaust pressure, exhaust humidity, exhaust temperature, exhaust flow rate, and particulate matter quantity; determining the adjustment range of particulate matter and absolute humidity based on the engine exhaust characteristics; constructing an experimental device to explore the influencing factors of particulate matter quantity; and comparing experimental data when adjusting absolute humidity and the original particulate matter quantity.

[0115] This invention can simulate particulate matter generation from natural gas engines. By combining absolute humidity adjustment, it can explore the impact of ambient humidity on particulate matter emissions from natural gas engines, effectively reducing test time.

[0116] The experimental method for studying the influencing factors of PN described in this invention is based on the actual particulate matter emissions of natural gas engines. The experimental measurement results are highly correlated with the actual particulate matter emissions of natural gas engines, and can well reflect the influence of ambient humidity on the amount of particulate matter in the emissions of natural gas engines.

[0117] This invention can accurately characterize the variation of particulate matter number in natural gas engines under different exhaust environments. It not only provides necessary technical means for studying the influencing factors of particulate matter number, but also provides important support for the research on the measurement standard of engine particulate matter number.

[0118] It should be noted that the above are merely illustrative examples and do not specifically limit the composition or testing logic of this device.

[0119] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0120] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0121] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0122] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0123] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0124] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0125] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0126] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0129] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A clean fuel engine emissions test apparatus characterized by, The clean fuel engine emissions testing device includes: Control module; A particulate matter generator, connected to the control module, is used to generate gaseous emissions; the particulate matter generator includes a combustion chamber and a clean fuel delivery unit, an air delivery unit, and an oil delivery unit connected to the combustion chamber; wherein, the gaseous emissions are used to simulate emissions generated under clean fuel engine operation conditions; A steam generator, connected to the control module, is used to provide steam. A dilution channel, connected to both the steam generator and the particulate matter generator, is used to mix the gaseous emissions and the steam. A particulate matter measuring device, connected to the dilution channel, is used to measure particulate data; The control module is connected to the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to adjust the clean fuel delivery unit, the air delivery unit, and the oil delivery unit to generate a first mixed gas with a preset ratio that is input into the combustion chamber; wherein, the preset ratio is related to the operating conditions of the clean fuel engine; The control module is connected to the particulate matter measuring device to adjust the water vapor generator to produce water vapor with a preset humidity; it receives the particulate data and tests the emissions of the clean fuel engine based on the preset humidity and the particulate data.

2. The clean fuel engine emission testing apparatus according to claim 1, characterized in that, The particulate matter generator also includes a first flow controller and a second flow controller; The clean fuel delivery unit is connected to the combustion chamber via the first flow controller, and the air delivery unit is connected to the combustion chamber via the second flow controller. The control module is connected to both the first flow controller and the second flow controller to adjust the flow rate of the clean fuel delivery unit via the first flow controller and the flow rate of the air delivery unit via the second flow controller.

3. The clean fuel engine emission testing apparatus according to claim 1, characterized in that, The device also includes a temperature detection unit, a humidity detection unit, and a pressure detection unit; The temperature detection unit is used to detect the temperature at the inlet, outlet, and inside of the dilution channel; the humidity detection unit is used to detect the relative humidity at the inlet, outlet, and inside of the dilution channel; and the pressure detection unit is used to detect the pressure at the inlet, outlet, and inside of the dilution channel. The temperature detection unit, the humidity detection unit, and the pressure detection unit are all connected to the control module.

4. The clean fuel engine emission testing apparatus according to claim 3, characterized in that, The device also includes a clean air delivery unit; The clean air delivery unit is connected to the control module and is used to dilute the gas in the dilution channel; The control module is used to: determine the absolute humidity based on the temperature, relative humidity, and pressure; determine the condensation index based on the absolute humidity; and dilute the gas in the dilution channel through the clean air delivery unit based on the condensation index.

5. The clean fuel engine emission testing apparatus according to claim 1, characterized in that, The oil delivery unit includes an oil injection assembly; The oil injection assembly is connected to the combustion chamber via a metering assembly.

6. The clean fuel engine emission testing apparatus according to claim 1, characterized in that, The combustion chamber also includes an air-fuel ratio detection component; The air-fuel ratio detection component is connected to the control module and is located at the outlet of the combustion chamber to collect the air-fuel ratio of the gas emissions. The control module is used to adjust the clean fuel delivery unit, air delivery unit, and oil delivery unit according to the air-fuel ratio.

7. The clean fuel engine emission testing apparatus according to claim 1, characterized in that, The particulate matter measuring device includes a first measuring unit and a second measuring unit; The first measuring unit is located before the dilution channel and is used to measure the first particle data of the gas before mixing; the second measuring unit is located after the dilution channel and is used to measure the second particle data of the gas after mixing.

8. A method for testing emissions from a clean fuel engine, characterized in that, The method includes: Acquire characteristic data of emissions from clean fuel engines; Based on the aforementioned characteristic data, the humidity range and particulate matter adjustment range are determined; Based on the particulate matter adjustment range, a preset ratio is determined; based on the humidity range, a preset humidity is determined. According to the preset ratio and preset humidity, a particulate matter generator and a water vapor generator are set up, and a clean fuel engine emission test device is built. Based on the built clean fuel engine emission test device, the emissions of the clean fuel engine are tested.

9. The method according to claim 8, characterized in that, The method further includes: The temperature, relative humidity, and pressure of the mixed gas are obtained; the mixed gas consists of gaseous emissions from a particulate matter generator and water vapor from a water vapor generator. Determine the saturated vapor pressure based on the stated temperature; The absolute humidity is determined based on the saturated vapor pressure, the relative humidity, and the pressure. The moisture content of air, the moisture content of gaseous emissions, and the moisture content of water vapor are collected, and the condensation index is determined based on the sum of the moisture content of air, the moisture content of gaseous emissions, and the moisture content of water vapor, combined with the absolute humidity. The mixed gas is diluted according to the condensation index.

10. A clean fuel engine, characterized in that, The gaseous emissions are tested using the clean fuel engine emissions testing apparatus as described in any one of claims 1 to 7.

Images