Method, device, electronic equipment and storage medium for controlling engine

Abstract

The present application provides a method, device, electronic device and storage medium for controlling an engine, and relates to the field of engine technology. In the process of exhaust gas emission from the engine, a first upstream temperature of the oxidation catalyst and a second upstream temperature of the particulate matter trap are determined, and based on a first comparison result between the first upstream temperature and a first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, it is determined whether the amount of hydrocarbons in the exhaust gas exceeds the standard. When it is identified that the amount of hydrocarbons in the exhaust gas exceeds the standard, the control parameters of the engine can be adjusted in time to reduce the amount of hydrocarbons emitted by the engine. In this way, the oxidation catalyst can be prevented from being covered by excessive hydrocarbons, thereby improving the conversion efficiency of the engine exhaust emission after-treatment system.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a method, device, electronic device and storage medium for controlling an engine. Background Art

[0002] The DOC (diesel oxide catalyst) in the engine exhaust after-treatment system can reduce the chemical reaction activation energy of HC, CO and NO in the exhaust gas, allowing these substances to undergo oxidation reaction with oxygen in the exhaust gas and ultimately convert into CO2, NO2 and H2O.

[0003] However, when the amount of HC in the exhaust gas exceeds the standard, causing the DOC to be covered by excessive HC, it will affect the conversion efficiency of the engine exhaust emission after-treatment system. Summary of the invention

[0004] In order to solve the above-mentioned problems in the prior art, the embodiments of the present application provide a method, device, electronic device and storage medium for controlling an engine, which are used to reduce the HC emissions of the engine and prevent the DOC from being covered by excessive HC, thereby improving the conversion efficiency of the engine exhaust emission after-treatment system.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling an engine, the method comprising:

[0006] During the process of exhaust gas emission from the engine, determining a first upstream temperature of the oxidation catalyst and a second upstream temperature of the particulate matter trap;

[0007] determining whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and a first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, wherein the first threshold value is a response temperature at which the oxidation catalyst undergoes an oxidation reaction, the first comparison result is used to indicate whether the oxidation catalyst undergoes an oxidation reaction, and the second comparison result is used to indicate the severity of the oxidation reaction;

[0008] If it is determined that the amount of carbon and hydrogen in the exhaust gas exceeds the standard, the control parameters of the engine are adjusted to reduce the carbon and hydrogen emissions of the engine.

[0009] In a possible implementation manner, determining whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and the first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, includes:

[0010] If the first comparison result is that the first upstream temperature is greater than the first threshold, and the second comparison result is that the difference between the second upstream temperature and the first upstream temperature is greater than the second threshold, it is determined that the amount of hydrocarbons in the exhaust gas exceeds the standard.

[0011] In a possible implementation manner, adjusting the control parameters of the engine includes:

[0012] The control parameters of the engine are adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature and the first upstream temperature and the control parameters of the engine.

[0013] In a possible implementation, the control parameters of the engine include common rail pressure and / or injection advance angle, and the change rate of the difference is inversely proportional to the common rail pressure, and the change rate of the difference is inversely proportional to the injection advance angle.

[0014] In a possible implementation manner, before determining whether the amount of carbon and hydrogen in the exhaust gas exceeds the standard, the method further includes:

[0015] Within the preset duration of the engine startup, if the first upstream temperature is less than a third threshold and the first upstream temperature is greater than the second upstream temperature, an operation of determining whether the amount of hydrocarbons in the exhaust gas exceeds the standard is performed, and the third threshold is less than or equal to the first threshold.

[0016] In a possible implementation, the method further includes:

[0017] If the first upstream temperature is less than a third threshold, and the first upstream temperature is less than or equal to the second upstream temperature, it is determined that a temperature sensor upstream of the oxidation catalyst and a temperature sensor upstream of the particulate matter trap are installed reversely.

[0018] In a second aspect, an embodiment of the present application provides a device for controlling an engine, the device comprising:

[0019] a temperature determination unit, for determining a first upstream temperature of the oxidation catalyst and a second upstream temperature of the particulate matter trap during exhaust gas emission from the engine;

[0020] an exhaust gas detection unit, configured to determine whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and a first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, wherein the first threshold value is a response temperature at which the oxidation catalyst undergoes an oxidation reaction, the first comparison result is used to indicate whether the oxidation catalyst undergoes an oxidation reaction, and the second comparison result is used to indicate the severity of the oxidation reaction;

[0021] The parameter adjustment unit is used to adjust the control parameters of the engine to reduce the carbon and hydrogen emissions of the engine if it is determined that the carbon and hydrogen content in the exhaust gas exceeds the standard.

[0022] In a possible implementation manner, the exhaust gas detection unit is specifically used to:

[0023] If the first comparison result is that the first upstream temperature is greater than the first threshold, and the second comparison result is that the difference between the second upstream temperature and the first upstream temperature is greater than the second threshold, it is determined that the amount of hydrocarbons in the exhaust gas exceeds the standard.

[0024] In a possible implementation manner, the parameter adjustment unit is specifically used to:

[0025] The control parameters of the engine are adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature and the first upstream temperature and the control parameters of the engine.

[0026] In a possible implementation, the control parameters of the engine include common rail pressure and / or injection advance angle, and the change rate of the difference is inversely proportional to the common rail pressure, and the change rate of the difference is inversely proportional to the injection advance angle.

[0027] In a possible implementation manner, the temperature determination unit is further used to:

[0028] Within the preset duration of the engine startup, if the first upstream temperature is less than a third threshold and the first upstream temperature is greater than the second upstream temperature, an operation of determining whether the amount of hydrocarbons in the exhaust gas exceeds the standard is performed, and the third threshold is less than or equal to the first threshold.

[0029] In a possible implementation manner, the temperature determination unit is further used to:

[0030] If the first upstream temperature is less than a third threshold, and the first upstream temperature is less than or equal to the second upstream temperature, it is determined that a temperature sensor upstream of the oxidation catalyst and a temperature sensor upstream of the particulate matter trap are installed reversely.

[0031] In a third aspect, an embodiment of the present application provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and when the computer program is executed by the processor, any one of the methods for controlling an engine in the first aspect is implemented.

[0032] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any one of the methods for controlling an engine in the first aspect is implemented.

[0033] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0034] The embodiments of the present application provide a method, device, electronic device and storage medium for controlling an engine, which can determine the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap during the process of the engine emitting exhaust gas, and determine whether the amount of hydrocarbons in the exhaust gas exceeds the standard based on the first comparison result of the first upstream temperature and the first threshold value, and the second comparison result of the first upstream temperature and the second upstream temperature. When it is identified that the amount of hydrocarbons in the exhaust gas exceeds the standard, the control parameters of the engine can be adjusted in time to reduce the amount of hydrocarbons emitted by the engine. In this way, the DOC can be prevented from being covered by excessive hydrocarbons, thereby improving the conversion efficiency of the engine exhaust emission after-treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A flow chart of a method for controlling an engine provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of an engine exhaust after-treatment system provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of a device for controlling an engine provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0041] It should be noted that the terms "including" and "having" and their variations involved in the documents of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] The DOC (diesel oxide catalyst) in the engine exhaust after-treatment system can reduce the chemical reaction activation energy of HC, CO and NO in the exhaust gas, allowing these substances to undergo oxidation reaction with oxygen in the exhaust gas and ultimately convert into CO2, NO2 and H2O.

[0043] However, when the amount of HC in the exhaust gas exceeds the standard, causing the DOC to be covered by excessive HC, it will affect the conversion efficiency of the engine exhaust emission after-treatment system.

[0044] Based on this, a method, device, electronic device and storage medium for controlling an engine provided in an embodiment of the present application can determine the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap during the process of the engine emitting exhaust gas, and determine whether the amount of hydrocarbons in the exhaust gas exceeds the standard based on the first comparison result of the first upstream temperature and the first threshold value, and the second comparison result of the first upstream temperature and the second upstream temperature. When it is identified that the amount of hydrocarbons in the exhaust gas exceeds the standard, the control parameters of the engine can be adjusted in time to reduce the amount of hydrocarbons emitted by the engine. In this way, the DOC can be prevented from being covered by excessive hydrocarbons, thereby improving the conversion efficiency of the engine exhaust emission after-treatment system.

[0045] Figure 1 A flow chart of a method for controlling an engine provided by an embodiment of the present application is shown, and the method can be performed by an ECU (electronic control unit, vehicle controller). Figure 1 As shown, the method for controlling the engine may include the following steps:

[0046] Step S101 : in the process of exhaust gas emission from the engine, determining a first upstream temperature of the oxidation catalyst and a second upstream temperature of the particulate matter trap.

[0047] In order to reduce pollutants in engine exhaust, it is usually necessary to install an engine exhaust aftertreatment system in the vehicle. Figure 2As shown, the engine exhaust after-treatment system may include DOC (diesel oxide catalyst), DPF (diesel particulate filter), SCR (selective catalytic reduction) and ASC (ammonia slip catalyst).

[0048] Among them, the DOC in the engine exhaust after-treatment system is coated with precious metal catalysts (such as Pt, etc.) on a honeycomb ceramic carrier, which can reduce the chemical reaction activation energy of HC, CO and NO in the exhaust gas, allowing these substances to undergo oxidation reaction with oxygen in the exhaust gas and eventually convert into CO2, NO2 and H2O.

[0049] The DPF in the engine exhaust after-treatment system mainly filters and captures particulate matter in the engine exhaust through diffusion, deposition and impact mechanisms. When the engine exhaust passes through the DPF, the particulate matter is captured in the filter element of the filter body, and the remaining cleaner exhaust is discharged into the atmosphere.

[0050] The SCR in the engine exhaust after-treatment system is used to reduce the content of nitrogen oxides (NOx) in the engine exhaust in the engine after-treatment application. Nitrogen oxides are one of the main harmful components of engine exhaust. The working principle of SCR is to inject a reducing agent into the exhaust pipe. Under the catalytic action of the catalyst, the reducing agent can react with nitrogen oxides in the exhaust gas, thereby achieving the purpose of reducing the concentration of nitrogen oxides.

[0051] The ASC in the engine exhaust after-treatment system is set at the rear end of the SCR, which can reduce the ammonia (NH3) leaked from the exhaust gas at the rear end of the SCR through catalytic oxidation.

[0052] exist Figure 2 On the basis of the engine exhaust emission after-treatment system shown, in order to determine the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap, temperature sensors can be respectively arranged upstream of the oxidation catalyst and upstream of the particulate matter trap, wherein the temperature sensor upstream of the oxidation catalyst is used to obtain the first upstream temperature of the oxidation catalyst, and the temperature sensor upstream of the particulate matter trap is used to obtain the second upstream temperature of the particulate matter trap.

[0053] When the engine exhaust after-treatment system leaves the factory, it is possible that the temperature sensor upstream of the oxidation catalyst and the temperature sensor upstream of the particulate matter trap are installed in reverse. Therefore, before determining whether the hydrocarbon content in the engine exhaust exceeds the standard based on the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap, it is possible to first determine whether the temperature sensor is installed in reverse.

[0054] In a specific implementation, it can be determined whether the first upstream temperature of the oxidation catalyst is less than a preset third threshold value, wherein the preset third threshold value is less than or equal to the response temperature of the oxidation catalyst for the oxidation reaction. Within the preset duration of engine startup, when the first upstream temperature of the oxidation catalyst is less than the preset third threshold value, it means that the oxidation catalyst has not yet undergone an oxidation reaction and will not release heat to the downstream of the oxidation catalyst. Since the heat of the engine exhaust gas is lost during the transmission process of the engine exhaust emission after-treatment system, therefore, when the oxidation catalyst has not yet undergone an oxidation reaction, the first upstream temperature of the oxidation catalyst should be greater than the second upstream temperature of the particulate matter trap.

[0055] In some embodiments, within a preset duration of engine startup, if the first upstream temperature of the oxidation catalyst is less than the third threshold value, and the first upstream temperature of the oxidation catalyst is less than or equal to the second upstream temperature of the particulate matter trap, it indicates that the temperature sensor upstream of the oxidation catalyst and the temperature sensor upstream of the particulate matter trap are installed in reverse. At this time, the ECU can output a warning message through a display device or a speaker in the vehicle to prompt the user to perform maintenance.

[0056] In other embodiments, within the preset duration of engine startup, if the first upstream temperature of the oxidation catalyst is less than the third threshold value, and the first upstream temperature of the oxidation catalyst is greater than the second upstream temperature of the particulate matter trap, it means that the temperature sensor upstream of the oxidation catalyst and the temperature sensor upstream of the particulate matter trap are not installed in reverse. At this time, the subsequent operation of determining whether the hydrocarbon content in the engine exhaust exceeds the standard can be performed.

[0057] Step S102 , determining whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and the first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature.

[0058] The first threshold is the response temperature of the oxidation catalyst at which an oxidation reaction occurs, the first comparison result is used to indicate whether an oxidation reaction occurs in the oxidation catalyst, and the second comparison result is used to indicate the severity of the oxidation reaction.

[0059] After the ECU obtains the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap, it can first compare the first upstream temperature of the oxidation catalyst with the preset first threshold value to obtain a first comparison result. Since the first threshold value is the response temperature of the oxidation catalyst for the oxidation reaction, if the first upstream temperature of the oxidation catalyst is greater than the first threshold value, it means that the oxidation catalyst has an oxidation reaction and releases heat to the downstream.

[0060] After the ECU obtains the first comparison result that the first upstream temperature of the oxidation catalyst is greater than the first threshold, it can continue to compare the magnitude relationship between the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap to obtain a second comparison result. If the second upstream temperature of the particulate matter trap is greater than the first upstream temperature of the oxidation catalyst, and the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst is greater than the preset second threshold, it means that the amount of hydrocarbons attached to the oxidation catalyst is large, resulting in a violent oxidation reaction and a large amount of heat. At this time, it can be determined that the amount of hydrocarbons in the exhaust gas discharged by the engine exceeds the standard, and the control parameters of the engine need to be adjusted accordingly.

[0061] However, it should be noted that the various thresholds in the embodiments of the present application can be set according to actual usage requirements. For example, as the response temperature of the oxidation-reduction reaction of the oxidation catalyst, the first threshold can be set to 200°C, or the first threshold can also be set to 240°C. The embodiments of the present application do not limit this.

[0062] Step S103: if it is determined that the amount of carbon and hydrogen in the exhaust gas exceeds the standard, the control parameters of the engine are adjusted to reduce the carbon and hydrogen emissions of the engine.

[0063] If it is determined according to step S102 that the amount of carbon and hydrogen in the exhaust gas emitted by the engine exceeds the standard, the carbon and hydrogen emission of the engine can be reduced by adjusting the control parameters of the engine.

[0064] Exemplarily, the common rail pressure of the engine and / or the injection advance angle of the engine can be adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst and the common rail pressure of the engine and / or the injection advance angle of the engine.

[0065] The common rail pressure of the engine refers to the pressure of the fuel in the common rail pipe in the high-pressure common rail system. The common rail system is a fuel supply method that can completely separate the generation of injection pressure and the injection process from each other. The high-pressure fuel is delivered to the common rail pipe by a high-pressure oil pump. By precisely controlling the oil pressure in the common rail pipe, the pressure of the high-pressure oil pipe is independent of the engine speed, which can greatly reduce the change of the engine fuel supply pressure with the engine speed.

[0066] Therefore, in some embodiments, the common rail pressure of the engine may be adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst and the common rail pressure of the engine.

[0067] The change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst is inversely proportional to the common rail pressure of the engine. That is, the faster the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst, the lower the common rail pressure of the engine after adjustment.

[0068] The injection advance angle of the engine refers to the angle at which the injection system injects fuel before ignition during the operation of the engine. The size of this angle directly affects the combustion efficiency and power performance of the engine. When the injection advance angle of the engine is too large, the pre-combustion period will be long, causing the engine to work roughly. When the injection advance angle of the engine is too small, the combustion process will be delayed too much, the maximum pressure value will drop, and the thermal efficiency of the engine will be significantly reduced.

[0069] Therefore, in other embodiments, the injection advance angle of the engine may be adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst and the injection advance angle of the engine.

[0070] The change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst is inversely proportional to the corresponding relationship of the injection advance angle of the engine. That is, the faster the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst, the lower the injection advance angle of the adjusted engine.

[0071] In other embodiments, the injection advance angle of the engine and the common rail pressure of the engine may also be adjusted based on the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst. Since the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst is inversely proportional to the corresponding relationship between the injection advance angle of the engine and the common rail pressure of the engine, the faster the change rate of the difference between the second upstream temperature of the particulate matter trap and the first upstream temperature of the oxidation catalyst, the lower the common rail pressure and injection advance angle of the engine after adjustment.

[0072] A method for controlling an engine provided by an embodiment of the present application can determine a first upstream temperature of an oxidation catalyst and a second upstream temperature of a particulate matter trap during exhaust gas emission from the engine, and determine whether an oxidation catalyst undergoes an oxidation reaction to generate heat based on a first comparison result between the first upstream temperature of the oxidation catalyst and a first threshold value. Next, based on a second comparison result between the first upstream temperature of the oxidation catalyst and the second upstream temperature of the particulate matter trap, it can be determined whether the oxidation reaction occurring in the oxidation catalyst is violent, thereby determining whether the amount of hydrocarbons in the exhaust gas emitted by the engine exceeds the standard. When it is identified that the amount of hydrocarbons in the exhaust gas exceeds the standard, the control parameters of the engine can be adjusted in a timely manner to reduce the amount of hydrocarbons emitted by the engine. In this way, the oxidation catalyst can be prevented from being covered by excessive hydrocarbons, thereby improving the conversion efficiency of the engine exhaust emission after-treatment system.

[0073] Based on the same inventive concept, an embodiment of the present invention further provides a structural schematic diagram of a device for controlling an engine, such as Figure 3 As shown, the device for controlling the engine includes:

[0074] The temperature determination unit 301 is used to determine a first upstream temperature of the oxidation catalyst and a second upstream temperature of the particulate matter trap during the process of exhaust gas emission from the engine;

[0075] An exhaust gas detection unit 302, used to determine whether the amount of hydrocarbons in the exhaust gas exceeds the standard according to a first comparison result between the first upstream temperature and the first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, wherein the first threshold value is a response temperature at which an oxidation catalyst undergoes an oxidation reaction, the first comparison result is used to indicate whether an oxidation catalyst undergoes an oxidation reaction, and the second comparison result is used to indicate the severity of the oxidation reaction;

[0076] The parameter adjustment unit 303 is used to adjust the control parameters of the engine to reduce the carbon and hydrogen emissions of the engine if it is determined that the carbon and hydrogen content in the exhaust gas exceeds the standard.

[0077] In a possible implementation, the exhaust gas detection unit 302 is specifically used to:

[0078] If the first comparison result is that the first upstream temperature is greater than the first threshold, and the second comparison result is that the difference between the second upstream temperature and the first upstream temperature is greater than the second threshold, it is determined that the hydrocarbon content in the exhaust gas exceeds the standard.

[0079] In a possible implementation manner, the parameter adjustment unit 303 is specifically configured to:

[0080] The control parameters of the engine are adjusted according to the corresponding relationship between the change rate of the difference between the second upstream temperature and the first upstream temperature and the control parameters of the engine.

[0081] In a possible implementation, the control parameters of the engine include common rail pressure and / or injection advance angle, and the change rate of the difference is inversely proportional to the common rail pressure, and the change rate of the difference is inversely proportional to the injection advance angle.

[0082] In a possible implementation manner, the temperature determination unit 301 is further configured to:

[0083] Within the preset duration of engine startup, if the first upstream temperature is less than the third threshold and the first upstream temperature is greater than the second upstream temperature, an operation of determining whether the hydrocarbon content in the exhaust gas exceeds the standard is performed, and the third threshold is less than or equal to the first threshold.

[0084] In a possible implementation manner, the temperature determination unit 301 is further configured to:

[0085] If the first upstream temperature is less than the third threshold, and the first upstream temperature is less than or equal to the second upstream temperature, it is determined that the temperature sensor upstream of the oxidation catalyst and the temperature sensor upstream of the particulate matter trap are installed reversely.

[0086] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, which may be the ECU mentioned above. The electronic device includes at least a memory and a processor for storing data, wherein, for the processor for data processing, when executing the processing, a microprocessor, a CPU, a GPU (Graphics Processing Unit), a DSP or an FPGA may be used for implementation. For the memory, an operation instruction is stored in the memory, and the operation instruction may be a computer executable code, and each step in the process of the method for controlling the engine in the embodiment of the present application described above is implemented by the operation instruction.

[0087] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown, the electronic device 400 includes a memory 401, a processor 402, a data acquisition module 403 and a bus 404. The memory 401, the processor 402 and the data acquisition module 403 are all connected via the bus 404, and the bus 404 is used to transmit data between the memory 401, the processor 402 and the data acquisition module 403.

[0088] The memory 401 can be used to store software programs and modules, and the processor 402 executes various functional applications and data processing of the electronic device 400 by running the software programs and modules stored in the memory 401, such as the method for controlling an engine provided in the embodiment of the present application. The memory 401 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application application, etc.; the data storage area can store data created according to the use of the electronic device 400, etc. In addition, the memory 401 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0089] The processor 402 is the control center of the electronic device 400, and uses the bus 404 and various interfaces and lines to connect various parts of the entire electronic device 400, and executes various functions of the electronic device 400 and processes data by running or executing software programs and / or modules stored in the memory 401, and calling data stored in the memory 401. Optionally, the processor 402 may include one or more processing units, such as a CPU, a GPU (Graphics Processing Unit), a digital processing unit, etc.

[0090] An embodiment of the present application further provides a computer-readable storage medium, in which computer executable instructions are stored. When the computer program is executed by a processor, it can be used to implement the method of controlling an engine described in any embodiment of the present application.

[0091] In some possible implementations, various aspects of the method for controlling an engine provided by the present application may also be implemented in the form of a program product, which includes program code. When the program product is run on a computer device, the program code is used to enable the computer device to execute the steps of the method for controlling an engine according to various exemplary embodiments of the present application described above in this specification. For example, the computer device may execute the following steps: Figure 4 The flow chart of the method for controlling an engine is shown.

[0092] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0093] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0096] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling an engine, characterized in that: The method comprises: within a preset duration of engine startup, if a first upstream temperature of the oxidation catalyst is less than a third threshold value, and the first upstream temperature is greater than a second upstream temperature of the particulate matter trap, determining the first upstream temperature and the second upstream temperature, wherein the third threshold value is less than or equal to the first threshold value, and the first threshold value is a response temperature of the oxidation catalyst for an oxidation reaction; determining whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and a first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, wherein the first comparison result is used to indicate whether an oxidation reaction occurs in the oxidation catalyst, and the second comparison result is used to indicate the severity of the oxidation reaction; If it is determined that the amount of hydrocarbons in the exhaust gas exceeds the standard, the control parameters of the engine are adjusted according to the change rate of the difference between the second upstream temperature and the first upstream temperature and the corresponding relationship with the control parameters of the engine to reduce the hydrocarbon emissions of the engine, the control parameters of the engine including the common rail pressure and / or the injection advance angle, the change rate of the difference and the corresponding relationship with the common rail pressure are inversely proportional, and the change rate of the difference and the corresponding relationship with the injection advance angle are inversely proportional.

2. The method according to claim 1, characterized in that The determining whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and the first threshold value and a second comparison result between the first upstream temperature and the second upstream temperature includes: If the first comparison result is that the first upstream temperature is greater than the first threshold, and the second comparison result is that the difference between the second upstream temperature and the first upstream temperature is greater than the second threshold, it is determined that the amount of hydrocarbons in the exhaust gas exceeds the standard.

3. The method according to claim 1, characterized in that The method further comprises: If the first upstream temperature is less than a third threshold, and the first upstream temperature is less than or equal to the second upstream temperature, it is determined that a temperature sensor upstream of the oxidation catalyst and a temperature sensor upstream of the particulate matter trap are installed reversely.

4. A device for controlling an engine, characterized in that: The device comprises: a temperature determination unit, configured to determine the first upstream temperature and the second upstream temperature if a first upstream temperature of the oxidation catalyst is less than a third threshold value and the first upstream temperature is greater than a second upstream temperature of the particulate matter trap within a preset duration of engine startup, wherein the third threshold value is less than or equal to the first threshold value, and the first threshold value is a response temperature of the oxidation catalyst for an oxidation reaction; an exhaust gas detection unit, configured to determine whether the amount of hydrocarbons in the exhaust gas exceeds a standard according to a first comparison result between the first upstream temperature and a first threshold value, and a second comparison result between the first upstream temperature and the second upstream temperature, wherein the first comparison result is used to indicate whether an oxidation reaction occurs in the oxidation catalyst, and the second comparison result is used to indicate the severity of the oxidation reaction; A parameter adjustment unit is used to adjust the control parameters of the engine to reduce the carbon and hydrogen emissions of the engine according to the change rate of the difference between the second upstream temperature and the first upstream temperature and the corresponding relationship with the control parameters of the engine if it is determined that the carbon and hydrogen content in the exhaust gas exceeds the standard, wherein the control parameters of the engine include common rail pressure and / or injection advance angle, the change rate of the difference and the corresponding relationship of the common rail pressure are inversely proportional, and the change rate of the difference and the corresponding relationship of the injection advance angle are inversely proportional.

5. The device according to claim 4, characterized in that The exhaust gas detection unit is specifically used for: If the first comparison result is that the first upstream temperature is greater than the first threshold, and the second comparison result is that the difference between the second upstream temperature and the first upstream temperature is greater than the second threshold, it is determined that the amount of hydrocarbons in the exhaust gas exceeds the standard.

6. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program executable on the processor, and when the computer program is executed by the processor, the method according to any one of claims 1 to 3 is implemented.

7. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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