A burner fuel injection quantity control method, system, device, controller and medium

Abstract

The application discloses a burner fuel injection amount control method, system, device, controller and medium. The burner fuel injection amount control method comprises the following steps: obtaining an SCR inlet temperature and a temperature control comparison threshold value; when the SCR inlet temperature is lower than the temperature control comparison threshold value, calculating an SCR reaction efficiency and a target temperature difference between the SCR inlet temperature and the temperature control comparison threshold value; and determining a burner target fuel injection amount according to the target temperature difference, a feedback control algorithm and the SCR reaction efficiency. The technical scheme of the embodiment of the application can improve the nitrogen oxide reaction efficiency during cold start of an engine.

Description

Technical Field

[0001] This invention relates to the field of automotive exhaust gas treatment technology, and in particular to a method, system, device, controller, and medium for controlling the amount of fuel injected into a burner. Background Technology

[0002] The main pollutants from commercial vehicle engines include nitrogen oxides and particulate matter. Nitrogen oxides not only cause photochemical smog and severely damage the ozone layer, but also seriously endanger human health. Currently, the common method is to install a Selective Catalytic Reduction (SCR) in the aftertreatment system of commercial vehicles. Urea is injected into the SCR, and the urea hydrolyzes into ammonia in a mixer. The ammonia and nitrogen oxides react in the SCR to produce nitrogen and water, thereby eliminating nitrogen oxides.

[0003] The emission of nitrogen oxides in engines is mainly concentrated during the cold start process. During this stage, the temperature of the SCR carrier is low, resulting in insufficient reaction between ammonia and nitrogen oxides. How to improve the reaction efficiency of nitrogen oxides during engine cold start has become a research hotspot. Summary of the Invention

[0004] This invention provides a method, system, device, controller, and medium for controlling the amount of fuel injected into a burner, in order to solve the problem of low reaction efficiency of nitrogen oxides during engine cold start.

[0005] According to one aspect of the present invention, a method for controlling the fuel injection quantity of a burner is provided, comprising:

[0006] Obtain the SCR inlet temperature and the temperature control comparison threshold;

[0007] When the SCR inlet temperature is lower than the temperature control comparison threshold, calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold.

[0008] The target fuel injection quantity for the burner is determined based on the target temperature difference, feedback control algorithm, and SCR reaction efficiency.

[0009] According to another aspect of the present invention, a burner fuel injection quantity control system is provided, comprising: a combustion controller, a fuel injector drive unit, and a temperature acquisition sensor; wherein,

[0010] The combustion controller is communicatively connected to the fuel injector drive unit and the temperature acquisition sensor, respectively.

[0011] A temperature acquisition sensor is used to acquire the SCR inlet temperature and transmit it to the combustion controller;

[0012] The combustion controller is used to acquire the SCR inlet temperature and the temperature control comparison threshold; when the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold; based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity of the burner; and transmits the target fuel injection quantity of the burner to the fuel injector drive unit.

[0013] The fuel injector drive unit is used to inject fuel according to the target fuel injection quantity of the burner.

[0014] According to another aspect of the present invention, a burner fuel injection quantity control device is provided, comprising:

[0015] The data acquisition module is used to acquire the inlet temperature of the selective catalytic reduction (SCR) and the temperature control comparison threshold.

[0016] The data processing module is used to calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold when the SCR inlet temperature is lower than the temperature control comparison threshold.

[0017] The burner target fuel injection quantity determination module is used to determine the burner target fuel injection quantity based on the target temperature difference, feedback control algorithm, and SCR reaction efficiency.

[0018] According to another aspect of the present invention, a combustion controller is provided, the combustion controller comprising:

[0019] At least one processor; and

[0020] A memory communicatively connected to the at least one processor; wherein,

[0021] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the burner fuel injection quantity control method according to any embodiment of the present invention.

[0022] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the burner fuel injection quantity control method according to any embodiment of the present invention.

[0023] The technical solution of this invention obtains the SCR inlet temperature and a temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold. Then, based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity for the burner. In this solution, the SCR inlet temperature reflects the actual temperature of the vehicle exhaust gas entering the SCR, and the SCR reaction efficiency reflects the reaction efficiency of the vehicle exhaust gas within the SCR. By using the SCR inlet temperature and SCR reaction efficiency, the fuel injection quantity of the burner can be precisely controlled to allow for on-demand control of the reaction temperature within the SCR during engine cold starts. This improves the reaction efficiency of nitrogen oxides in the vehicle exhaust gas, solving the problem of low nitrogen oxide reaction efficiency during engine cold starts and enhancing the overall nitrogen oxide reaction efficiency during engine cold starts.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart of a burner fuel injection quantity control method provided in Embodiment 1 of the present invention;

[0027] Figure 2 This is a flowchart of a burner fuel injection quantity control method provided in Embodiment 2 of the present invention;

[0028] Figure 3 This is a schematic diagram of a burner fuel injection quantity control system provided in Embodiment 3 of the present invention;

[0029] Figure 4 This is a schematic diagram of a burner fuel injection quantity control device provided in Embodiment 4 of the present invention;

[0030] Figure 5 A schematic diagram of a combustion controller that can be used to implement an embodiment of the present invention is shown. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a 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.

[0033] Example 1

[0034] Figure 1 This is a flowchart of a burner fuel injection quantity control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the efficient after-treatment of automobile exhaust. The method can be executed by a burner fuel injection quantity control device, which can be implemented in hardware and / or software and can be configured in the combustion controller. Figure 1 As shown, the method includes:

[0035] Step 110: Obtain the SCR inlet temperature and the temperature control comparison threshold.

[0036] The SCR inlet temperature can be used to characterize the temperature of the vehicle exhaust gas at the SCR inlet. The temperature control comparison threshold can be a temperature threshold set based on the temperature required for the chemical reaction in the SCR.

[0037] In this embodiment of the invention, the SCR inlet temperature and the temperature control comparison threshold can be obtained first.

[0038] Step 120: When the SCR inlet temperature is lower than the temperature control comparison threshold, calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold.

[0039] The SCR reaction efficiency can be used to characterize the conversion efficiency of SCR. The target temperature difference can be the temperature difference between the SCR inlet temperature and the temperature control comparison threshold.

[0040] In this embodiment of the invention, the SCR inlet temperature is compared with a temperature control comparison threshold. If the SCR inlet temperature is lower than the temperature control comparison threshold, it indicates that the low temperature in the SCR affects the vehicle exhaust purification effect. The SCR reaction efficiency is then calculated, along with the temperature difference between the SCR inlet temperature and the temperature control comparison threshold, which is used as the target temperature difference. If the SCR inlet temperature is not lower than the temperature control comparison threshold, it indicates that the temperature in the SCR is sufficient to ensure the vehicle exhaust purification effect. In this case, there is no need to calculate the SCR reaction efficiency or the target temperature difference, and fuel can be injected into the burner according to the vehicle's default fuel injection quantity.

[0041] Step 130: Determine the target fuel injection quantity for the burner based on the target temperature difference, feedback control algorithm, and SCR reaction efficiency.

[0042] The feedback control algorithm can be a conventional control algorithm used in feedback control, such as proportional control, integral control, derivative control, and proportional-integral-derivative control. The target fuel injection quantity for the burner can be the fuel injection quantity for the burner determined based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency.

[0043] In this embodiment of the invention, the target temperature difference can be used as the input parameter of the feedback control algorithm, and then a burner fuel injection quantity can be calculated based on the feedback control algorithm. The calculated burner fuel injection quantity can then be adjusted according to the SCR reaction efficiency to obtain the target fuel injection quantity of the burner.

[0044] The technical solution of this invention obtains the SCR inlet temperature and a temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold. Then, based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity for the burner. In this solution, the SCR inlet temperature reflects the actual temperature of the vehicle exhaust gas entering the SCR, and the SCR reaction efficiency reflects the reaction efficiency of the vehicle exhaust gas within the SCR. By using the SCR inlet temperature and SCR reaction efficiency, the fuel injection quantity of the burner can be precisely controlled to allow for on-demand control of the reaction temperature within the SCR during engine cold starts. This improves the reaction efficiency of nitrogen oxides in the vehicle exhaust gas, solving the problem of low nitrogen oxide reaction efficiency during engine cold starts and enhancing the overall nitrogen oxide reaction efficiency during engine cold starts.

[0045] Example 2

[0046] Figure 2This is a flowchart of a burner fuel injection quantity control method provided in Embodiment 2 of the present invention. This embodiment is based on the above embodiment and is further specified, providing specific optional implementation methods for determining the target fuel injection quantity of the burner according to the target temperature difference, feedback control algorithm, and SCR reaction efficiency. Figure 2 As shown, the method includes:

[0047] Step 210: Obtain the SCR inlet temperature and the temperature control comparison threshold.

[0048] Step 220: When the SCR inlet temperature is lower than the temperature control comparison threshold, calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold.

[0049] Step 230: Calculate the initial fuel injection quantity of the burner based on the target temperature difference and the feedback control algorithm.

[0050] The initial fuel injection quantity of the burner can be calculated based on the target temperature difference and feedback control algorithm, that is, the fuel injection quantity that is not adjusted according to the SCR reaction efficiency.

[0051] In this embodiment of the invention, the target temperature difference can be used as the input parameter of the feedback control algorithm, and then the initial fuel injection quantity of the burner can be calculated based on the feedback control algorithm.

[0052] Step 240: Determine the target fuel injection quantity of the burner based on the SCR reaction efficiency and the initial fuel injection quantity of the burner.

[0053] In this embodiment of the invention, the fuel injection quantity adjustment weight that matches the SCR reaction efficiency can be determined according to the temperature control management strategy, thereby adjusting the initial fuel injection quantity of the burner based on the fuel injection quantity adjustment weight to obtain the target fuel injection quantity of the burner.

[0054] In an optional embodiment of the present invention, determining the target fuel injection quantity of the burner based on the SCR reaction efficiency and the initial fuel injection quantity of the burner may include: determining the target fuel injection quantity adjustment weight based on the SCR reaction efficiency and the burner exhaust temperature management efficiency range; and multiplying the target fuel injection quantity adjustment weight with the initial fuel injection quantity of the burner to obtain the target fuel injection quantity of the burner.

[0055] The burner exhaust temperature management efficiency range can be a range of reaction efficiencies corresponding to the temperature control management strategy. Optionally, the burner exhaust temperature management efficiency range can include a first efficiency range, a second efficiency range, and a third efficiency range. The first efficiency range can be 0-60%, the second efficiency range can be 60%-80%, and the third efficiency range can be 80%-95%. It should be noted that the first, second, and third efficiency ranges can be adjusted according to actual temperature control needs. The target fuel injection quantity adjustment weight can be a weighting factor for adjusting the initial fuel injection quantity of the burner. Optionally, the fuel injection quantity adjustment weights corresponding to each range within the burner exhaust temperature management efficiency range can be pre-set in the temperature control management strategy.

[0056] In this embodiment of the invention, the specific range within which the SCR reaction efficiency falls into the burner exhaust temperature management efficiency range can be determined, and the target fuel injection quantity adjustment weight matching the specific range into which the SCR reaction efficiency falls can be determined. Then, the target fuel injection quantity adjustment weight is multiplied with the initial fuel injection quantity of the burner to obtain the target fuel injection quantity of the burner.

[0057] In an optional embodiment of the present invention, determining the target fuel injection quantity adjustment weight based on the SCR reaction efficiency and the burner exhaust temperature management efficiency range may include: when the SCR reaction efficiency is in a first efficiency range of the burner exhaust temperature management efficiency range, using a first weight value as the target fuel injection quantity adjustment weight; when the SCR reaction efficiency is in a second efficiency range of the burner exhaust temperature management efficiency range, using a second weight value as the target fuel injection quantity adjustment weight; and when the SCR reaction efficiency is in a third efficiency range of the burner exhaust temperature management efficiency range, using a third weight value as the target fuel injection quantity adjustment weight.

[0058] The first weight value can be a weight value that matches the first efficiency interval. The second weight value can be a weight value that matches the second efficiency interval. The third weight value can be a weight value that matches the third efficiency interval.

[0059] In this embodiment of the invention, the SCR reaction efficiency is compared with each interval of the burner exhaust temperature management efficiency range. If the SCR reaction efficiency is in the first efficiency interval of the burner exhaust temperature management efficiency range, the first weight value is used as the target fuel injection quantity adjustment weight. If the SCR reaction efficiency is in the second efficiency interval of the burner exhaust temperature management efficiency range, the second weight value is used as the target fuel injection quantity adjustment weight. If the SCR reaction efficiency is in the third efficiency interval of the burner exhaust temperature management efficiency range, the third weight value is used as the target fuel injection quantity adjustment weight.

[0060] In an optional embodiment of the present invention, the SCR reaction efficiency is calculated based on the following formula:

[0061]

[0062] Where η represents the SCR reaction efficiency, NOxUs represents the concentration of nitrogen oxides at the SCR inlet, MfExh represents the exhaust mass flow rate, and NOxDs represents the concentration of nitrogen oxides at the SCR outlet.

[0063] The technical solution of this invention obtains the SCR inlet temperature and a temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold. Then, based on the target temperature difference and a feedback control algorithm, it calculates the initial fuel injection quantity of the burner. Finally, based on the SCR reaction efficiency and the initial fuel injection quantity, it determines the target fuel injection quantity of the burner. In this solution, the SCR inlet temperature reflects the actual temperature of the vehicle exhaust gas entering the SCR, and the SCR reaction efficiency reflects the reaction efficiency of the vehicle exhaust gas in the SCR. By using the SCR inlet temperature and SCR reaction efficiency, the fuel injection quantity of the burner can be precisely controlled to control the reaction temperature within the SCR on demand during engine cold starts. This improves the reaction efficiency of nitrogen oxides in the vehicle exhaust gas, solving the problem of low nitrogen oxide reaction efficiency during engine cold starts and enhancing the overall nitrogen oxide reaction efficiency during engine cold starts.

[0064] Example 3

[0065] Embodiment 3 of the present invention provides a burner fuel injection quantity control system, including a combustion controller, a fuel injector drive unit, and a temperature acquisition sensor; wherein, the combustion controller is communicatively connected to the fuel injector drive unit and the temperature acquisition sensor.

[0066] A temperature acquisition sensor is used to acquire the SCR inlet temperature and transmit it to the combustion controller. The combustion controller is used to acquire the SCR inlet temperature and the temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold are calculated. Based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, the target fuel injection quantity of the burner is determined. The target fuel injection quantity of the burner is transmitted to the fuel injector drive unit. The fuel injector drive unit is used to inject fuel according to the target fuel injection quantity of the burner.

[0067] The temperature sensor can be any sensor with temperature acquisition capabilities. The fuel injector drive unit is the component that drives the nozzle to inject fuel.

[0068] In this embodiment of the invention, a combustor fuel injection quantity control system is constituted by a combustion controller, a fuel injector drive unit, and a temperature acquisition sensor. The combustion controller is communicatively connected to the fuel injector drive unit and the temperature acquisition sensor, respectively.

[0069] Specifically, a temperature acquisition sensor collects the SCR inlet temperature and transmits it to the combustion controller. The combustion controller receives the SCR inlet temperature and obtains a temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold. Based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity for the burner and transmits the target fuel injection quantity to the fuel injector drive unit so that the fuel injector drive unit can inject fuel according to the target fuel injection quantity.

[0070] In an optional embodiment of the present invention, the burner injection quantity control system further includes a first nitrogen oxide concentration acquisition sensor, a second nitrogen oxide concentration acquisition sensor, and an exhaust mass flow acquisition device; wherein, the first nitrogen oxide concentration acquisition sensor can be used to acquire the concentration of nitrogen oxides at the SCR inlet and send the concentration of nitrogen oxides at the SCR inlet to the combustion controller; the second nitrogen oxide concentration acquisition sensor is used to acquire the concentration of nitrogen oxides at the SCR outlet and send the concentration of nitrogen oxides at the SCR outlet to the combustion controller; the exhaust mass flow acquisition device is used to acquire the exhaust mass flow rate and send the exhaust mass flow rate to the combustion controller; the combustion controller is used to calculate the SCR reaction efficiency as shown in the following formula: Where η represents the SCR reaction efficiency, NOxUs represents the concentration of nitrogen oxides at the SCR inlet, MfExh represents the exhaust mass flow rate, and NOxDs represents the concentration of nitrogen oxides at the SCR outlet.

[0071] Both the first and second nitrogen oxide concentration sensors are used to collect nitrogen oxide concentrations. The exhaust gas mass flow rate collector can be a component that collects the mass flow rate of flue gas from the exhaust port.

[0072] In this embodiment of the invention, a first nitrogen oxide concentration sensor can be used to collect the nitrogen oxide concentration at the SCR inlet, and this concentration is then sent to the combustion controller. A second nitrogen oxide concentration sensor is used to collect the nitrogen oxide concentration at the SCR outlet, and this concentration is also sent to the combustion controller. The combustion controller then substitutes the nitrogen oxide concentration at the SCR inlet, the exhaust gas mass flow rate, and the nitrogen oxide concentration at the SCR outlet into... The SCR reaction efficiency was obtained.

[0073] Figure 3This is a schematic diagram of a burner fuel injection quantity control system provided in Embodiment 3 of the present invention, as shown below. Figure 3 As shown, the burner fuel injection control system includes a combustion controller, a fuel injector drive unit, an exhaust mass flow collector, a first nitrogen oxide concentration sensor, a second nitrogen oxide concentration sensor, an analog-to-digital converter, a temperature sensor, and a burner fuel nozzle.

[0074] The analog-to-digital converter is used to convert the data collected by the exhaust mass flow collector, the first nitrogen oxide concentration collector, the second nitrogen oxide concentration collector, and the temperature collector into signals, and send the corresponding digital signals to the combustion controller. The combustion controller then calculates the target fuel injection quantity of the burner based on the burner fuel injection quantity control method, and then drives the fuel injector of the burner to inject fuel through the fuel injector drive unit.

[0075] In a specific example, the combustion controller determines whether the SCR inlet temperature is higher than the temperature control comparison threshold. If the SCR inlet temperature is higher than the threshold, it indicates that the SCR carrier temperature is high and the SCR reaction efficiency is high. In this case, the burner exhaust temperature management function is turned off. If the SCR inlet temperature is lower than the threshold, the SCR reaction efficiency η is calculated using the exhaust mass flow rate, the concentration of nitrogen oxides at the SCR inlet, and the concentration of nitrogen oxides at the SCR outlet. The calculation method is as follows:

[0076]

[0077] If the SCR reaction efficiency is below 60% (i.e., in the first efficiency range), apply temperature control management strategy 1 to manage and control the burner exhaust temperature.

[0078] If the SCR reaction efficiency is in the range of 60% to 80% (i.e., in the second efficiency range), apply temperature control management strategy 2 to manage and control the burner exhaust temperature.

[0079] If the SCR reaction efficiency is in the range of 80% to 85% (i.e., in the second efficiency range), apply temperature control management strategy 3 to manage and control the burner exhaust temperature.

[0080] Before determining the temperature control management strategy, it is also necessary to calculate the difference between the SCR inlet temperature and the target temperature of the temperature control comparison threshold. Then, based on the target temperature difference, the initial fuel injection quantity of the burner is calculated by the proportional controller. When applying temperature control management strategy 1 for burner exhaust temperature management control, the target fuel injection quantity adjustment weight is set to 1; when applying temperature control management strategy 2 for burner exhaust temperature management control, the target fuel injection quantity adjustment weight is set to 0.7; and when applying temperature control management strategy 3 for burner exhaust temperature management control, the target fuel injection quantity adjustment weight is set to 0.5.

[0081] Example 4

[0082] Figure 4 This is a schematic diagram of a burner fuel injection quantity control device provided in Embodiment 4 of the present invention. Figure 4 As shown, the device includes:

[0083] Data acquisition module 310 is used to acquire the inlet temperature of the selective catalytic reduction (SCR) and the temperature control comparison threshold.

[0084] The data processing module 320 is used to calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold when the SCR inlet temperature is lower than the temperature control comparison threshold.

[0085] The burner target injection quantity determination module 330 is used to determine the burner target injection quantity based on the target temperature difference, feedback control algorithm, and SCR reaction efficiency.

[0086] The technical solution of this invention obtains the SCR inlet temperature and a temperature control comparison threshold. When the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold. Then, based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity for the burner. In this solution, the SCR inlet temperature reflects the actual temperature of the vehicle exhaust gas entering the SCR, and the SCR reaction efficiency reflects the reaction efficiency of the vehicle exhaust gas within the SCR. By using the SCR inlet temperature and SCR reaction efficiency, the fuel injection quantity of the burner can be precisely controlled to allow for on-demand control of the reaction temperature within the SCR during engine cold starts. This improves the reaction efficiency of nitrogen oxides in the vehicle exhaust gas, solving the problem of low nitrogen oxide reaction efficiency during engine cold starts and enhancing the overall nitrogen oxide reaction efficiency during engine cold starts.

[0087] Optionally, the burner target injection quantity determination module 330 includes a burner initial injection quantity calculation unit and a burner target injection quantity determination unit. The burner initial injection quantity calculation unit is used to calculate the burner initial injection quantity based on the target temperature difference and the feedback control algorithm. The burner target injection quantity determination unit is used to determine the burner target injection quantity based on the SCR reaction efficiency and the burner initial injection quantity.

[0088] Optionally, the burner target injection quantity determination unit is used to determine the target injection quantity adjustment weight based on the SCR reaction efficiency and the burner exhaust temperature management efficiency range; and to multiply the target injection quantity adjustment weight with the initial injection quantity of the burner to obtain the burner target injection quantity.

[0089] Optionally, the burner target injection quantity determination unit is used to use a first weight value as the target injection quantity adjustment weight when the SCR reaction efficiency is in the first efficiency range of the burner exhaust temperature management efficiency range; to use a second weight value as the target injection quantity adjustment weight when the SCR reaction efficiency is in the second efficiency range of the burner exhaust temperature management efficiency range; and to use a third weight value as the target injection quantity adjustment weight when the SCR reaction efficiency is in the third efficiency range of the burner exhaust temperature management efficiency range.

[0090] Optionally, the SCR reaction efficiency can be calculated based on the following formula: Where η represents the SCR reaction efficiency, NOxUs represents the concentration of nitrogen oxides at the SCR inlet, MfExh represents the exhaust mass flow rate, and NOxDs represents the concentration of nitrogen oxides at the SCR outlet.

[0091] The burner fuel injection quantity control device provided in the embodiments of the present invention can execute the burner fuel injection quantity control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0092] Example 5

[0093] Figure 5 A schematic diagram of a combustion controller that can be used to implement embodiments of the present invention is shown. The combustion controller is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The combustion controller can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0094] like Figure 5As shown, the combustion controller 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the combustion controller 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0095] Multiple components in the combustion controller 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the combustion controller 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0096] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the burner fuel injection quantity control method.

[0097] In some embodiments, the burner injection quantity control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the combustion controller 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the burner injection quantity control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the burner injection quantity control method by any other suitable means (e.g., by means of firmware).

[0098] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0099] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0100] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0101] To provide user interaction, the systems and techniques described herein can be implemented on a combustion controller having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the combustion controller. Other types of devices can also be used to provide user interaction; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0102] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0103] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0104] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0105] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling the amount of fuel injected into a burner, characterized in that, Applied to combustion controllers, including: Obtain the inlet temperature of the selective catalytic reduction (SCR) unit and the temperature control comparison threshold; When the SCR inlet temperature is lower than the temperature control comparison threshold, the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold are calculated. The target fuel injection quantity of the burner is determined based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency. The step of determining the target fuel injection quantity of the burner based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency includes: The initial fuel injection quantity of the burner is calculated based on the target temperature difference and the feedback control algorithm. Based on the SCR reaction efficiency and the burner exhaust temperature management efficiency range, the target fuel injection quantity adjustment weight is determined. When the SCR reaction efficiency is within the first efficiency range of the burner exhaust temperature management efficiency range, the first weight value is used as the target fuel injection quantity adjustment weight. When the SCR reaction efficiency is in the second efficiency range of the burner exhaust temperature management efficiency range, the second weight value is used as the target fuel injection quantity adjustment weight. When the SCR reaction efficiency is in the third efficiency range of the burner exhaust temperature management efficiency range, the third weight value is used as the target fuel injection quantity adjustment weight. The target fuel injection quantity adjustment weight is multiplied by the initial fuel injection quantity of the burner to obtain the target fuel injection quantity of the burner.

2. The method according to claim 1, characterized in that, include: The SCR reaction efficiency was calculated based on the following formula: ； in, Indicates the SCR reaction efficiency. This indicates the concentration of nitrogen oxides at the SCR inlet. Indicates exhaust mass flow rate, This indicates the concentration of nitrogen oxides at the SCR outlet.

3. A burner fuel injection quantity control system, wherein the burner fuel injection quantity control method as described in any one of claims 1-2 is used for control, characterized in that, This includes a combustion controller, a fuel injector drive unit, and a temperature acquisition sensor; among which, The combustion controller is communicatively connected to the fuel injector drive unit and the temperature acquisition sensor, respectively. The temperature acquisition sensor is used to acquire the SCR inlet temperature and transmit the SCR inlet temperature to the combustion controller; The combustion controller is used to acquire the SCR inlet temperature and the temperature control comparison threshold; when the SCR inlet temperature is lower than the temperature control comparison threshold, it calculates the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold; based on the target temperature difference, the feedback control algorithm, and the SCR reaction efficiency, it determines the target fuel injection quantity of the burner; and it transmits the target fuel injection quantity of the burner to the fuel injector drive unit. The fuel injector drive unit is used to inject fuel according to the target fuel injection quantity of the burner.

4. The system according to claim 3, characterized in that, It also includes a first nitrogen oxide concentration sensor, a second nitrogen oxide concentration sensor, and an exhaust gas mass flow meter; among which, The first nitrogen oxide concentration acquisition sensor is used to acquire the concentration of nitrogen oxides at the SCR inlet and send the concentration of nitrogen oxides at the SCR inlet to the combustion controller; The second nitrogen oxide concentration acquisition sensor is used to acquire the concentration of nitrogen oxides at the SCR outlet and send the concentration of nitrogen oxides at the SCR outlet to the combustion controller; The exhaust mass flow rate collector is used to collect the exhaust mass flow rate and send the exhaust mass flow rate to the combustion controller; The combustion controller is used to calculate the SCR reaction efficiency using the following formula: ； in, Indicates the SCR reaction efficiency. This indicates the concentration of nitrogen oxides at the SCR inlet. Indicates exhaust mass flow rate, This indicates the concentration of nitrogen oxides at the SCR outlet.

5. A burner fuel injection quantity control device, wherein the burner fuel injection quantity control method as described in any one of claims 1-2 is used for control, characterized in that, Configured in the combustion controller, including: The data acquisition module is used to acquire the SCR inlet temperature and the temperature control comparison threshold. The data processing module is used to calculate the SCR reaction efficiency and the target temperature difference between the SCR inlet temperature and the temperature control comparison threshold when the SCR inlet temperature is lower than the temperature control comparison threshold. The burner target fuel injection quantity determination module is used to determine the burner target fuel injection quantity based on the target temperature difference, feedback control algorithm, and SCR reaction efficiency.

6. A combustion controller, characterized in that, The combustion controller includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the burner fuel injection quantity control method according to any one of claims 1-2.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the burner fuel injection quantity control method according to any one of claims 1-2.

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