Ammonia diesel engine fuel distribution method, device, equipment and readable storage medium

Abstract

The present invention provides a method, device, apparatus, and readable storage medium for distributing fuel in an ammonia-diesel engine, comprising: determining an engine fuel distribution mode when the engine is at a preset time; determining the required torques of diesel and ammonia at the preset time based on the engine fuel distribution mode; determining the diesel fuel quantity based on the required torque, diesel thermal efficiency, diesel calorific value, and engine displacement at the preset time; and determining the ammonia quantity based on the required torque, ammonia thermal efficiency, ammonia calorific value, and engine displacement at the preset time. This invention can effectively reduce the large amount of carbon emissions generated by diesel combustion, while also effectively addressing the problems of difficult combustion and insufficient reaction of pure ammonia fuel, thereby improving the thermal efficiency and fuel economy of the engine.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a method, device, equipment and readable storage medium for distributing fuel for an ammonia-diesel engine. Background Art

[0002] Nowadays, in the carbon reduction design plan for heavy-duty commercial vehicles, problems such as high cost, short driving range, and difficulty in charging of power batteries are prominent. Hydrogen fuel cells also have shortcomings such as high cost, poor durability, and inconvenient fuel storage and transportation. Ammonia is a zero-carbon fuel with high energy density, easy liquefaction, and convenient storage, transportation, and manufacturing. It is one of the ideal green fuels in the field of medium and heavy-duty commercial vehicles. Ammonia fuel is added to the diesel engine to form an engine with a dual-fuel combustion mode.

[0003] When the vehicle's driving conditions are complex, how to choose the combustion distribution mode and how to control the combustion method specifically can not only reduce the large amount of carbon emissions produced by diesel combustion, but also effectively improve the problems of difficult combustion and insufficient reaction of pure ammonia fuel, thereby improving the thermal efficiency of the engine and improving economy. Summary of the Invention

[0004] The main purpose of the present invention is to provide an ammonia-diesel engine fuel distribution method, device, equipment and readable storage medium, aiming to reduce the large amount of carbon emissions generated by diesel combustion, while also effectively improving the problems of difficult combustion and insufficient reaction of pure ammonia fuel, thereby improving the thermal efficiency of the engine and improving economy.

[0005] In a first aspect, the present invention provides a method for distributing fuel for an ammonia-diesel engine, the method comprising:

[0006] When the engine is at a preset time, determining an engine fuel distribution mode;

[0007] determining the required torque of diesel and ammonia at the preset time according to the engine fuel distribution mode;

[0008] The amount of diesel is determined according to the required torque, thermal efficiency, calorific value of diesel and engine displacement at the preset time; the amount of ammonia is determined according to the required torque, thermal efficiency, calorific value of ammonia and engine displacement at the preset time.

[0009] Optionally, when the engine is at a preset time, the step of determining the engine fuel distribution mode includes:

[0010] When the engine is at a preset time, detect whether the engine is in idle or high idle condition;

[0011] When the engine is in an idle or high idle condition, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0012] When the engine is not in idle or high idle conditions, obtaining the engine speed at a preset time;

[0013] detecting whether the engine speed at the preset time is within a set range;

[0014] If the engine speed at the preset time is not within the set range, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0015] If the engine speed at the preset moment is within the set range, obtaining the engine required torque at the preset moment, the engine speed and the engine required torque at the previous preset moment;

[0016] Determining a torque deviation value, a speed change rate, and a torque change rate between the preset moment and the last preset moment based on the engine speed and engine demand torque at the preset moment and the engine speed and engine demand torque at the last preset moment;

[0017] detecting whether the torque deviation value, the speed change rate, and the torque change rate are all less than respective set thresholds;

[0018] If the torque deviation value, the speed change rate, and the torque change rate are all less than their respective set thresholds, determining that the engine fuel distribution mode is the ammonia-diesel steady-state blended combustion mode;

[0019] If at least one of the torque deviation value, the speed change rate, and the torque change rate is not less than the respective set thresholds, it is determined that the engine fuel distribution mode is the transient co-combustion mode.

[0020] Optionally, the step of determining the required torque of diesel and ammonia at the preset time according to the engine fuel distribution mode includes:

[0021] When the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, determining the diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode;

[0022] Determining the required torque of diesel and ammonia at the preset moment according to the engine required torque at the preset moment and the diesel and ammonia ratio coefficient at the preset moment;

[0023] When the engine fuel distribution mode is the transient co-firing mode, obtaining the required torques of diesel and ammonia in the previous steady-state co-firing mode and the engine required torque in the previous steady-state co-firing mode;

[0024] The engine demand torque at the preset moment is subtracted from the engine demand torque in the previous steady-state co-combustion mode to calculate a change in the engine demand torque at the preset moment;

[0025] The diesel demand torque at the preset moment is determined based on the diesel demand torque in the previous steady-state co-combustion mode and the change in the engine demand torque at the preset moment; the ammonia demand torque at the preset moment is determined based on the ammonia demand torque in the previous steady-state co-combustion mode.

[0026] Optionally, when the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, the step of determining the diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode includes:

[0027] When the fuel distribution mode of the engine is a pure diesel combustion mode, the diesel ratio coefficient at the preset time is 1, and the ammonia ratio coefficient at the preset time is 0;

[0028] When the fuel distribution mode of the engine is the ammonia-diesel steady-state blending mode, the diesel and ammonia ratio coefficient base MAP is queried according to the engine speed and engine required torque at a preset time to determine the diesel and ammonia ratio coefficient at the preset time.

[0029] Optionally, the step of determining the required torque of diesel at the preset moment based on the required torque of diesel in the previous steady-state co-combustion mode and the change in the required torque of the engine at the preset moment; and determining the required torque of ammonia at the preset moment based on the required torque of ammonia in the previous steady-state co-combustion mode includes:

[0030] detecting whether the engine demand torque change at the preset moment is less than an engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value;

[0031] When the engine demand torque change at the preset moment is not less than the engine demand torque change threshold, the sum of the engine demand torque change at the preset moment and the diesel demand torque in the previous steady-state co-firing mode is used as the diesel demand torque at the preset moment; the ammonia demand torque in the previous steady-state co-firing mode is used as the ammonia demand torque at the preset moment.

[0032] Optionally, after the step of detecting whether the engine demand torque change at the preset moment is less than an engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value, the method further includes:

[0033] When the engine demand torque change at the preset moment is less than the engine demand torque change threshold, the engine fuel distribution mode is reconfirmed to be the pure diesel combustion mode, and the step of determining the diesel and ammonia ratio coefficient at the preset moment according to the engine fuel distribution mode when the engine fuel distribution mode is the pure diesel combustion mode or the ammonia-diesel steady-state blended combustion mode is returned to.

[0034] Optionally, before the steps of determining the amount of diesel fuel based on the required torque, thermal efficiency, calorific value of diesel fuel, and engine displacement at the preset time; and determining the amount of ammonia based on the required torque, thermal efficiency, calorific value of ammonia fuel, and engine displacement at the preset time, the method further includes:

[0035] According to the engine speed at a preset time, the pre-stored diesel and ammonia thermal efficiency basic MAP is searched to determine the diesel and ammonia basic thermal efficiency values;

[0036] Correcting the diesel basic thermal efficiency value to determine the diesel thermal efficiency at a preset time;

[0037] Correcting the basic thermal efficiency value of ammonia to determine the thermal efficiency of ammonia at a preset time;

[0038] Obtain diesel calorific value, ammonia calorific value and engine displacement.

[0039] In a second aspect, the present invention further provides an ammonia-diesel engine fuel distribution device, the ammonia-diesel engine fuel distribution device comprising:

[0040] a first determining module, configured to determine an engine fuel distribution mode when the engine is at a preset time;

[0041] a second determining module, configured to determine the required torques of diesel and ammonia at the preset moment according to the engine fuel distribution mode;

[0042] The third determination module is used to determine the amount of diesel according to the required torque of diesel, diesel thermal efficiency, diesel calorific value and engine displacement at the preset time; and determine the amount of ammonia according to the required torque of ammonia, ammonia thermal efficiency, ammonia calorific value and engine displacement at the preset time.

[0043] In a third aspect, the present invention also provides an ammonia-diesel engine fuel dispensing device, which includes a processor, a memory, and an ammonia-diesel engine fuel dispensing program stored on the memory and executable by the processor, wherein when the ammonia-diesel engine fuel dispensing program is executed by the processor, the steps of the ammonia-diesel engine fuel dispensing method described above are implemented.

[0044] In a fourth aspect, the present invention also provides a readable storage medium, on which is stored an ammonia-diesel engine fuel distribution program, wherein when the ammonia-diesel engine fuel distribution program is executed by a processor, the steps of the ammonia-diesel engine fuel distribution method described above are implemented.

[0045] The present invention determines an engine fuel distribution mode when the engine is at a preset moment; determines the required torques of diesel and ammonia at the preset moment based on the engine fuel distribution mode; determines the amount of diesel oil based on the required torque of diesel at the preset moment, diesel thermal efficiency, diesel calorific value, and engine displacement; and determines the amount of ammonia based on the required torque of ammonia at the preset moment, ammonia thermal efficiency, ammonia calorific value, and engine displacement. The present invention rationally distributes the required torques of diesel and ammonia through the engine fuel distribution mode; and calculates the required amount of oil and ammonia for the engine based on their respective required torques. This can effectively reduce the large amount of carbon emissions generated by diesel combustion, while also effectively improving the problems of difficult combustion and insufficient reaction of pure ammonia fuel, thereby improving the thermal efficiency and economy of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the process of distributing fuel for an ammonia-diesel engine according to the present invention;

[0047] Figure 2 Schematic diagram of a detailed flow chart of step S10 of the ammonia-diesel engine fuel distribution method of the present invention;

[0048] Figure 3 Schematic diagram of a detailed flow chart of step S20 of the ammonia-diesel engine fuel distribution method of the present invention;

[0049] Figure 4 Schematic diagram of a detailed flow chart of step S205 of the ammonia-diesel engine fuel distribution method of the present invention;

[0050] Figure 5 This is a schematic diagram of the functional modules of the fuel distribution device for an ammonia-diesel engine of the present invention;

[0051] Figure 6 Schematic diagram of the hardware structure of the ammonia-diesel engine fuel distribution equipment involved in the embodiment of the present invention.

[0052] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] In a first aspect, an embodiment of the present invention provides a method for distributing fuel in an ammonia-diesel engine.

[0055] Please refer to Figure 1 , Figure 1 FIG. 1 is a flow chart of the fuel distribution method for an ammonia-diesel engine according to the present invention. Figure 1 As shown, in one embodiment, the ammonia-diesel engine fuel distribution method includes:

[0056] Step S10, when the engine is at a preset time, determining the engine fuel distribution mode;

[0057] In this embodiment, the engine fuel distribution pattern is determined on a cyclic basis. Starting from the start of the first cycle, the start time of each cycle is determined at fixed intervals, and this is used as the preset time for determining the engine fuel distribution pattern. When the engine is at the preset time, the engine fuel distribution pattern is further determined. For example, if the start time of the first cycle is 0:00, and the cycle interval is 10 milliseconds, it can be inferred that the start time of the second cycle is 0:00:10 milliseconds, the start time of the third cycle is 0:00:20 milliseconds, and the start time of the fourth cycle is 0:00:30 milliseconds... Assuming that the engine is at the start time of the second cycle, that is, when the engine is at 0:00:10 milliseconds, the engine fuel distribution pattern is determined based on the engine operating condition, the engine speed and engine demand torque at the preset time, and the engine speed and engine demand torque at the previous preset time. It should be noted that the values listed in this embodiment, such as "0:00," "10 milliseconds," "0:00:10 milliseconds," "0:00:20 milliseconds," and "0:00:30 milliseconds," are for illustrative purposes only and are not intended to be limiting.

[0058] Further, in one embodiment, please refer to Figure 2 , Figure 2 FIG. 1 is a detailed flow chart of step S10 of the ammonia-diesel engine fuel distribution method of the present invention. Figure 2 As shown, in one embodiment, the ammonia-diesel engine fuel distribution method includes:

[0059] Step S101, when the engine is at a preset time, detecting whether the engine is in an idle or high idle state;

[0060] Step S102, when the engine is in an idle or high idle state, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0061] In this embodiment, when the engine is at a preset moment and the engine is in idle or high idle conditions, the engine operates under no-load conditions and only needs to overcome the friction resistance of its own internal components without outputting power to the outside. Ammonia burns slower than diesel. If ammonia is added at this time, the combustion stability will deteriorate. The idle or high idle conditions have higher requirements for combustion stability, so the engine fuel distribution mode is determined to be a pure diesel combustion mode.

[0062] Step S103, when the engine is not in idle or high idle state, obtaining the engine speed at a preset time;

[0063] Step S104, detecting whether the engine speed at the preset time is within a set range;

[0064] Step S105: if the engine speed at the preset time is not within the set range, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0065] In this embodiment, a speed range is set for the engine in advance. When the engine is not in idle or high idle conditions, the engine speed at the preset moment is detected to see if it is within the set range. If the engine speed at the preset moment is lower than the lower limit of the set range, it is considered that the engine load at the preset moment is too small, and there is no need to add ammonia combustion, and the engine fuel distribution mode is determined to be a pure diesel combustion mode; if the engine speed at the preset moment is higher than the upper limit of the set range, it is considered that the engine speed at the preset moment exceeds the maximum power speed. At this time, the engine speed increases, but the output power decreases, and the amount of diesel needs to be reduced. In order to prevent the diesel oil amount from being reduced too much and affecting the stability and safety of the engine combustion, the engine fuel distribution mode is determined to be a pure diesel combustion mode.

[0066] Step S106 , if the engine speed at the preset moment is within the set range, obtaining the engine required torque at the preset moment, the engine speed and the engine required torque at the previous preset moment;

[0067] Step S107, determining a torque deviation value, a speed change rate, and a torque change rate between the preset moment and the last preset moment based on the engine speed and engine demand torque at the preset moment and the engine speed and engine demand torque at the last preset moment;

[0068] In this embodiment, a pre-set engine speed range, such as 700-2000 rpm, is set. If the engine speed at a preset moment is between 700-2000 rpm, the engine speed and engine demand torque at the previous preset moment are obtained, where the previous preset moment is the start time of the previous cycle. The engine speed and engine demand torque at the preset moment and the engine speed and engine demand torque at the previous preset moment are substituted into the preset calculation formulas for the torque deviation value, speed change rate, and torque change rate, respectively, to further determine the torque deviation value, speed change rate, and torque change rate between the preset moment and the previous preset moment. It should be noted that the numerical values listed in this embodiment, such as "700-2000 rpm," are for illustrative purposes only and are not intended to be limiting values.

[0069] Step S108, detecting whether the torque deviation value, the speed change rate, and the torque change rate are all less than respective set thresholds;

[0070] Step S109: If the torque deviation value, the speed change rate, and the torque change rate are all less than their respective set thresholds, determining that the engine fuel distribution mode is the ammonia-diesel steady-state blending mode;

[0071] In this embodiment, the torque deviation value, speed change rate, and torque change rate between a preset moment and the previous preset moment are compared with preset torque deviation thresholds, speed change rate thresholds, and torque change rate thresholds, respectively. When the torque deviation value, speed change rate, and torque change rate range are all less than their respective thresholds, it indicates that the engine speed and engine demand torque values from the previous preset moment to the preset moment have not fluctuated significantly, indicating that the engine is in a stable state. The engine fuel distribution mode is further determined to be a steady-state ammonia-diesel blended combustion mode. For example, the torque deviation threshold is set to 400 Nm, the speed change rate threshold is set to 5%, and the torque change rate threshold is set to 5%. As long as the torque deviation value between the preset moment and the previous preset moment is less than the torque deviation value of 400 Nm, the speed change rate is less than the speed change rate threshold of 5%, and the torque change rate threshold is less than 5%, and these values are within a normal fluctuation range, the engine is determined to be in a stable state, and the engine fuel distribution mode is determined to be a steady-state ammonia-diesel blended combustion mode. It should be noted that the values listed in this embodiment, such as "400 Nm" and "5%," are for illustrative purposes only and are not intended to be limiting values.

[0072] In step S110 , if at least one of the torque deviation value, the speed change rate, and the torque change rate is not less than the respective set thresholds, it is determined that the engine fuel distribution mode is a transient co-combustion mode.

[0073] In this embodiment, if any one of the torque deviation, speed change rate, and torque change rate between a preset moment and the previous preset moment is not less than a threshold, the engine is considered unstable and the engine fuel distribution mode is further determined to be transient blended combustion. For example, the torque deviation threshold is set to 400 Nm, the speed change rate threshold is set to 5%, and the torque change rate threshold is set to 5%. If the driver significantly changes the throttle position or brake pedal position, or changes gears, all of which affect the engine speed and required engine torque, the engine is considered unstable and the engine fuel distribution mode is determined to be transient blended combustion if the torque deviation between the preset moment and the previous preset moment is not less than 400 Nm, the speed change rate is not less than 5%, or the torque change rate is not less than 5%. It should be noted that the values listed in this embodiment, such as "400 Nm" and "5%," are for illustrative purposes only and are not intended to be limiting values.

[0074] Step S20, determining the required torque of diesel and ammonia at the preset time according to the engine fuel distribution mode;

[0075] In this embodiment, the torques required for diesel and ammonia differ under different engine combustion distribution modes. Therefore, the required torques for diesel and ammonia at a preset time are further determined based on the engine fuel distribution mode. For example, the engine combustion distribution modes include a pure diesel combustion mode, a steady-state diesel-ammonia blended combustion mode, and a transient blended combustion mode. Under these three different engine distribution modes, the required torques for diesel and ammonia will vary to some extent. Therefore, the required torques for diesel and ammonia at a preset time are determined based on the engine fuel distribution mode at the preset time.

[0076] Further, in one embodiment, please refer to Figure 3 , Figure 3 FIG. 1 is a detailed flow chart of step S20 of the ammonia-diesel engine fuel distribution method of the present invention. Figure 3 As shown, the ammonia-diesel engine fuel distribution method includes:

[0077] Step S201, when the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, determining a diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode;

[0078] Step S202, determining the required torque of diesel and ammonia at the preset moment according to the engine required torque at the preset moment and the diesel and ammonia ratio coefficient at the preset moment;

[0079] In this embodiment, different engine combustion distribution modes correspond to different diesel and ammonia ratio coefficients. When the engine fuel distribution mode is a pure diesel combustion mode or a steady-state diesel-ammonia blended combustion mode, the ammonia-diesel ratio coefficient at a preset time is further determined based on the corresponding relationship between the engine combustion distribution mode and the ammonia-diesel ratio coefficient. The diesel and ammonia torque requirements at the preset time are then multiplied by the engine torque requirement at the preset time to obtain the required torques for diesel and ammonia, respectively. For example, in the pure diesel combustion mode, the engine burns only diesel without adding ammonia, and the diesel-ammonia ratio coefficient is 1:0. In the steady-state diesel-ammonia blended combustion mode, the diesel-ammonia ratio coefficient at the preset time is obtained by looking up the engine speed and engine torque requirement at the preset time. The diesel-ammonia ratio coefficient at the preset time is then multiplied by the engine torque requirement at the preset time to obtain the required torques for diesel and ammonia, respectively. It should be noted that the values listed in this embodiment, such as "1:0," are for illustrative purposes only and are not intended to be limiting values.

[0080] Step S203, when the engine fuel distribution mode is the transient co-combustion mode, obtaining the required torques of diesel and ammonia in the previous steady-state co-combustion mode and the required engine torque in the previous steady-state co-combustion mode;

[0081] Step S204, subtracting the engine required torque in the previous steady-state co-combustion mode from the engine required torque at the preset moment to calculate a change in the engine required torque at the preset moment;

[0082] Step S205: Determine the required torque of diesel at the preset moment based on the required torque of diesel in the previous steady-state co-combustion mode and the change in the required torque of the engine at the preset moment; and determine the required torque of ammonia at the preset moment based on the required torque of ammonia in the previous steady-state co-combustion mode.

[0083] In this embodiment, when the engine fuel distribution mode is the transient co-firing mode, although the required torque of diesel and ammonia cannot be determined by obtaining the diesel and ammonia ratio coefficient, the engine required torque at the preset moment can be subtracted from the engine required torque in the previous steady-state co-firing mode to calculate the engine required torque change at the preset moment. On the basis of the required torque of the diesel in the previous steady-state co-firing mode, the required torque of the diesel at the preset moment is increased or decreased to offset the engine required torque change at the preset moment, and further determine the diesel required torque at the preset moment; in addition, the ammonia required torque at the preset moment is further determined based on the ammonia required torque in the previous steady-state co-firing mode. For example, the engine demand torque in the previous steady-state co-firing mode is 800Nm, the diesel demand torque in the previous steady-state co-firing mode is 440Nm, and the ammonia demand torque in the previous steady-state co-firing mode is 360Nm; if the engine demand torque at the preset moment is 900Nm, the engine demand torque in the previous steady-state co-firing mode is subtracted from the engine demand torque in the preset moment, and the engine demand torque change at the preset moment is 100Nm; on the basis of the diesel demand torque of 440Nm in the previous steady-state co-firing mode, the diesel demand torque at the preset moment is increased to compensate for the difference of 100Nm in the engine demand torque change at the preset moment, and the diesel demand torque at the preset moment is 540Nm; the ammonia demand torque of 360Nm in the previous steady-state co-firing mode is used as the ammonia demand torque of 360Nm at the preset moment. It should be noted that the values listed in this embodiment, such as "800Nm", "440Nm", "360Nm", "900Nm", "100Nm" and "540Nm", are only used to illustrate the content of this embodiment and are not specific limiting values.

[0084] Furthermore, in one embodiment, step 201 includes:

[0085] When the fuel distribution mode of the engine is a pure diesel combustion mode, the diesel ratio coefficient at the preset time is 1, and the ammonia ratio coefficient at the preset time is 0;

[0086] When the fuel distribution mode of the engine is the ammonia-diesel steady-state blending mode, the diesel and ammonia ratio coefficient base MAP is queried according to the engine speed and engine required torque at a preset time to determine the diesel and ammonia ratio coefficient at the preset time.

[0087] In this embodiment, when the fuel distribution mode of the engine is a pure diesel combustion mode, the engine demand torque at the preset moment is all provided by diesel combustion. At this time, the diesel ratio coefficient is 1, and the ammonia ratio coefficient is 0. Based on multiple sets of bench test data, a basic MAP of engine speed, engine demand torque, and diesel and ammonia ratio coefficients is fitted. When the fuel distribution mode of the engine is a steady-state blended combustion mode of ammonia and diesel, the collected engine speed and engine demand torque at the preset moment are substituted into the pre-stored diesel and ammonia ratio coefficient basic MAP to further determine the diesel and ammonia ratio coefficient at the preset moment. For example, based on the bench test data, a corresponding relationship between the engine speed, engine demand torque, and ammonia ratio coefficient is obtained (here it is explained: ammonia ratio coefficient + diesel ratio coefficient = 1, and the diesel ratio coefficient can also be determined based on the ammonia ratio coefficient), as shown in the following table:

[0088] Speed rpm / torque Nm 400 800 1200 1600 200 0.2 0.3 0.4 0.5 400 0.3 0.4 0.5 0.6 600 0.35 0.45 0.55 0.65 800 0.45 0.55 0.65 0.65

[0089] If the engine speed at a preset time is 400 rpm and the engine torque demand is 800 rpm, the ammonia ratio coefficient at this time is 0.4, and the diesel ratio coefficient is determined to be 0.6. It should be noted that in this embodiment, the data values "400," "800," "0.6," etc. listed in the table are merely for illustrative purposes and are not intended to be limiting values.

[0090] Further, in one embodiment, please refer to Figure 4 , Figure 4 FIG. 1 is a detailed flow chart of step S205 of the ammonia-diesel engine fuel distribution method of the present invention. Figure 4 As shown, the ammonia-diesel engine fuel distribution method includes:

[0091] Step S2051, detecting whether the engine demand torque change at the preset moment is less than an engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value;

[0092] Step S2052: When the engine demand torque change at the preset moment is not less than the engine demand torque change threshold, the sum of the engine demand torque change at the preset moment and the diesel demand torque in the previous steady-state co-firing mode is used as the diesel demand torque at the preset moment; and the ammonia demand torque in the previous steady-state co-firing mode is used as the ammonia demand torque at the preset moment.

[0093] In this embodiment, the change in engine torque demand at a preset moment can be positive, zero, or negative. The diesel torque demand at the preset moment is increased or decreased based on the change in engine torque demand at the preset moment. A threshold value for the change in engine torque demand is preset, and serves as the lower limit for the decrease in diesel torque demand. As long as the decrease in diesel torque demand at the preset moment does not exceed the maximum decrease defined by the threshold value, the engine can operate normally in the transient co-firing mode. In this case, the diesel torque demand at the preset moment is added to the diesel torque demand in the previous steady-state co-firing mode to determine the diesel torque demand at the preset moment. Furthermore, the ammonia torque demand in the steady-state co-firing mode is used as the ammonia torque demand at the preset moment. For example, if the engine torque demand change at a preset moment is -100 Nm, and the engine torque demand change threshold is -200 Nm, then this means that the diesel torque demand decreases by 100 Nm at the preset moment. However, the diesel torque demand decreases by 100 Nm at the preset moment, but does not exceed the maximum decrease specified by the engine torque demand change threshold. Therefore, there is no need to worry about the diesel torque being reduced too much, leaving only ammonia burning alone in the engine cylinder. Therefore, the diesel torque demand at the preset moment is calculated by subtracting 100 Nm from the diesel torque demand in the previous steady-state co-combustion mode. The ammonia torque demand in the steady-state co-combustion mode is then used as the ammonia torque demand at the preset moment. It should be noted that the data listed in this embodiment, such as "-100 Nm" and "-200 Nm," are used only to illustrate the content of this embodiment and are not specific limiting values.

[0094] Furthermore, in one embodiment, after step S2051, the following steps are further included:

[0095] When the engine demand torque change at the preset moment is less than the engine demand torque change threshold, the engine fuel distribution mode is reconfirmed to be the pure diesel combustion mode, and the step of determining the diesel and ammonia ratio coefficient at the preset moment according to the engine fuel distribution mode when the engine fuel distribution mode is the pure diesel combustion mode or the ammonia-diesel steady-state blended combustion mode is returned to.

[0096] In this embodiment, if the diesel demand torque reduction at a predetermined time exceeds the maximum reduction specified by the engine demand torque change threshold, a large amount of ammonia may be burning in the engine cylinders. This could compromise the stability and safety of engine combustion, necessitating a reset of the engine fuel distribution mode to a pure diesel combustion mode, whereby diesel fuel is used to provide the engine demand torque at the predetermined time, eliminating the use of ammonia. For example, if the engine demand torque change at the predetermined time is -300 Nm and the engine demand torque change threshold is -200 Nm, this means that the diesel demand torque reduction at the predetermined time is 300 Nm. However, the diesel demand torque reduction at the predetermined time exceeds the maximum reduction specified by the engine demand torque change threshold. To maintain engine combustion stability and safety, diesel fuel should be used exclusively to provide the engine demand torque at the predetermined time. It should be noted that the values listed in this embodiment, such as "-300 Nm," "-200 Nm," and "300 Nm," are provided for illustrative purposes only and are not intended to be limiting values.

[0097] Step S30, determining the amount of diesel fuel according to the required torque, thermal efficiency, calorific value of diesel fuel and engine displacement at a preset time; determining the amount of ammonia according to the required torque, thermal efficiency, calorific value of ammonia fuel and engine displacement at a preset time.

[0098] In this embodiment, the required torque of diesel, diesel thermal efficiency, diesel calorific value and engine displacement at the preset time are substituted into the preset formula for calculating the diesel oil quantity, and the diesel oil quantity at the preset time is further obtained; the required torque of ammonia, ammonia thermal efficiency, ammonia calorific value and the engine displacement at the preset time are substituted into the preset formula for calculating the ammonia quantity of ammonia, and the ammonia quantity of ammonia at the preset time is further obtained.

[0099] Furthermore, in one embodiment, before step 30, the process further includes:

[0100] According to the engine speed at a preset time, the pre-stored diesel and ammonia thermal efficiency basic MAP is searched to determine the diesel and ammonia basic thermal efficiency values at the preset time;

[0101] Correcting the diesel basic thermal efficiency value at the preset time to determine the diesel thermal efficiency at the preset time;

[0102] Correcting the basic thermal efficiency value of ammonia at the preset time to determine the thermal efficiency of ammonia at the preset time;

[0103] Obtain diesel calorific value, ammonia calorific value and engine displacement.

[0104] In this embodiment, the engine speed at the preset time is substituted into the pre-stored diesel and ammonia thermal efficiency basic MAP, and the basic thermal efficiency values of diesel and ammonia at the preset time are further determined by reading the corresponding relationship between the engine speed and the pre-stored diesel and ammonia thermal efficiencies in the database; considering the influence of the engine air-fuel ratio drop, incomplete combustion, and the difference between the injection timing and the optimal injection timing on the thermal efficiency at the preset time, the basic thermal efficiency value of diesel at the preset time is corrected to further determine the diesel thermal efficiency at the preset time; considering the influence of the engine air-fuel ratio, ammonia pressure, and ammonia temperature at the preset time on the complete combustion of ammonia, the basic thermal efficiency value of ammonia at the preset time is corrected to further determine the thermal efficiency of ammonia at the preset time; and the fixed values of diesel calorific value, ammonia calorific value, and engine displacement are obtained from the vehicle local database.

[0105] In this embodiment, when the engine is at a preset time, an engine fuel distribution mode is determined; based on the engine fuel distribution mode, the required torques of diesel and ammonia at the preset time are determined; the diesel oil quantity is determined based on the required torque of diesel at the preset time, diesel thermal efficiency, diesel calorific value, and engine displacement; and the ammonia quantity is determined based on the required torque of ammonia at the preset time, ammonia thermal efficiency, ammonia calorific value, and engine displacement. This embodiment rationally distributes the required torques of diesel and ammonia through the engine fuel distribution mode; and calculates the required oil and ammonia quantities for the engine based on their respective required torques. This effectively reduces the large amount of carbon emissions generated by diesel combustion, while also effectively addressing the problems of difficult combustion and insufficient reaction of pure ammonia fuel, thereby improving the thermal efficiency and economy of the engine.

[0106] In a second aspect, an embodiment of the present invention further provides a fuel distribution device for an ammonia-diesel engine.

[0107] In one embodiment, referring to Figure 5 , Figure 5 Schematic diagram of the functional modules of the fuel distribution device of the ammonia diesel engine of the present invention. Figure 5 As shown, the ammonia diesel engine fuel distribution device includes:

[0108] A first determining module 10 is configured to determine an engine fuel distribution mode when the engine is at a preset time;

[0109] A second determining module 20 is configured to determine the required torques of diesel and ammonia at the preset time according to the engine fuel distribution mode;

[0110] The third determination module 30 is used to determine the amount of diesel according to the required torque of diesel, diesel thermal efficiency, diesel calorific value and engine displacement at the preset time; and to determine the amount of ammonia according to the required torque of ammonia, ammonia thermal efficiency, ammonia calorific value and engine displacement at the preset time.

[0111] Furthermore, in one embodiment, the first determining module 10 is specifically configured to:

[0112] When the engine is at a preset time, detect whether the engine is in idle or high idle condition;

[0113] When the engine is in an idle or high idle condition, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0114] When the engine is not in idle or high idle conditions, obtaining the engine speed at a preset time;

[0115] detecting whether the engine speed at the preset time is within a set range;

[0116] If the engine speed at the preset time is not within the set range, determining that the engine fuel distribution mode is a pure diesel combustion mode;

[0117] If the engine speed at the preset moment is within the set range, obtaining the engine required torque at the preset moment, the engine speed and the engine required torque at the previous preset moment;

[0118] Determining a torque deviation value, a speed change rate, and a torque change rate between the preset moment and the last preset moment based on the engine speed and engine demand torque at the preset moment and the engine speed and engine demand torque at the last preset moment;

[0119] detecting whether the torque deviation value, the speed change rate, and the torque change rate are all less than respective set thresholds;

[0120] If the torque deviation value, the speed change rate, and the torque change rate are all smaller than respective set thresholds, it is determined that the engine fuel distribution mode is the ammonia-diesel steady-state blending mode.

[0121] If at least one of the torque deviation value, the speed change rate, and the torque change rate is not less than the respective set thresholds, it is determined that the engine fuel distribution mode is the transient co-combustion mode.

[0122] Furthermore, in one embodiment, the second determining module 20 is specifically configured to:

[0123] When the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, determining the diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode;

[0124] Determining the required torque of diesel and ammonia at the preset moment according to the engine required torque at the preset moment and the diesel and ammonia ratio coefficient at the preset moment;

[0125] When the engine fuel distribution mode is the transient co-firing mode, obtaining the required torques of diesel and ammonia in the previous steady-state co-firing mode and the engine required torque in the previous steady-state co-firing mode;

[0126] The engine demand torque at the preset moment is subtracted from the engine demand torque in the previous steady-state co-combustion mode to calculate a change in the engine demand torque at the preset moment;

[0127] The diesel demand torque at the preset moment is determined based on the diesel demand torque in the previous steady-state co-combustion mode and the change in the engine demand torque at the preset moment; the ammonia demand torque at the preset moment is determined based on the ammonia demand torque in the previous steady-state co-combustion mode.

[0128] Furthermore, in one embodiment, the second determining module 20 is configured to:

[0129] When the fuel distribution mode of the engine is a pure diesel combustion mode, the diesel ratio coefficient at the preset time is 1, and the ammonia ratio coefficient at the preset time is 0;

[0130] When the fuel distribution mode of the engine is the ammonia-diesel steady-state blending mode, the diesel and ammonia ratio coefficient base MAP is queried according to the engine speed and engine required torque at a preset time to determine the diesel and ammonia ratio coefficient at the preset time.

[0131] Furthermore, in one embodiment, the second determining module 20 is configured to:

[0132] detecting whether the engine demand torque change at the preset moment is less than an engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value;

[0133] When the engine demand torque change at the preset moment is not less than the engine demand torque change threshold, the sum of the engine demand torque change at the preset moment and the diesel demand torque in the previous steady-state co-firing mode is used as the diesel demand torque at the preset moment; the ammonia demand torque in the previous steady-state co-firing mode is used as the ammonia demand torque at the preset moment.

[0134] Furthermore, in one embodiment, the second determining module 20 is configured to:

[0135] When the engine demand torque change at the preset moment is less than the engine demand torque change threshold, the engine fuel distribution mode is reconfirmed to be the pure diesel combustion mode, and the step of determining the diesel and ammonia ratio coefficient at the preset moment according to the engine fuel distribution mode when the engine fuel distribution mode is the pure diesel combustion mode or the ammonia-diesel steady-state blended combustion mode is returned to.

[0136] Furthermore, in one embodiment, the ammonia-diesel engine fuel distribution device further includes: an acquisition module for:

[0137] According to the engine speed at a preset time, the pre-stored diesel and ammonia thermal efficiency basic MAP is searched to determine the diesel and ammonia basic thermal efficiency values;

[0138] Correcting the diesel basic thermal efficiency value to determine the diesel thermal efficiency at a preset time;

[0139] Correcting the basic thermal efficiency value of ammonia to determine the thermal efficiency of ammonia at a preset time;

[0140] Obtain diesel calorific value, ammonia calorific value and engine displacement.

[0141] Among them, the functional implementation of each module in the above-mentioned ammonia-diesel engine fuel distribution device corresponds to the various steps in the above-mentioned ammonia-diesel engine fuel distribution method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0142] In a third aspect, an embodiment of the present invention provides an ammonia-diesel engine fuel dispensing device, which can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0143] Reference Figure 6 , Figure 6The hardware structure diagram of the ammonia-diesel engine fuel dispensing device involved in the embodiment of the present invention. In the embodiment of the present invention, the ammonia-diesel engine fuel dispensing device may include a processor 1001 (such as a central processing unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a wireless interface (such as a wireless fidelity WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001. Those skilled in the art will understand that Figure 6 The hardware structure shown in the figure does not constitute a limitation of the present invention, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0144] Continue to refer to Figure 6 , Figure 6 Memory 1005, a computer storage medium, may include an operating system, a network communication module, a user interface module, and an ammonia-diesel engine fuel allocation program. Processor 1001 may invoke the ammonia-diesel engine fuel allocation program stored in memory 1005 and execute the ammonia-diesel engine fuel allocation method provided in an embodiment of the present invention.

[0145] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium.

[0146] The readable storage medium of the present invention stores an ammonia-diesel engine fuel distribution program, wherein when the ammonia-diesel engine fuel distribution program is executed by a processor, the steps of the ammonia-diesel engine fuel distribution method as described above are implemented.

[0147] Among them, the method implemented when the ammonia-diesel engine fuel distribution program is executed can refer to the various embodiments of the ammonia-diesel engine fuel distribution method of the present invention, and will not be repeated here.

[0148] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0149] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0150] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in various embodiments of the present invention.

[0151] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for distributing fuel for an ammonia-diesel engine, characterized in that: The ammonia-diesel engine fuel distribution method comprises: When the engine is at a preset time, determining an engine fuel distribution mode; determining the required torque of diesel and ammonia at the preset time according to the engine fuel distribution mode; Determining the amount of diesel fuel based on the required torque, thermal efficiency, calorific value of diesel fuel, and engine displacement at the preset time; determining the amount of ammonia based on the required torque, thermal efficiency, calorific value of ammonia fuel, and engine displacement at the preset time; Before the steps of determining the amount of diesel fuel according to the required torque, thermal efficiency, calorific value of diesel fuel and engine displacement at the preset time; and determining the amount of ammonia according to the required torque, thermal efficiency, calorific value of ammonia fuel and engine displacement at the preset time, the method further comprises: According to the engine speed at a preset time, the pre-stored diesel and ammonia thermal efficiency basic MAP is searched to determine the diesel and ammonia basic thermal efficiency values; Correcting the diesel basic thermal efficiency value to determine the diesel thermal efficiency at a preset time; Correcting the basic thermal efficiency value of ammonia to determine the thermal efficiency of ammonia at a preset time; Obtain diesel calorific value, ammonia calorific value and engine displacement.

2. The method for distributing fuel for an ammonia-diesel engine according to claim 1, wherein: The step of determining the engine fuel distribution mode when the engine is at a preset time includes: When the engine is at a preset time, detect whether the engine is in idle or high idle condition; When the engine is in an idle or high idle condition, determining that the engine fuel distribution mode is a pure diesel combustion mode; When the engine is not in idle or high idle conditions, obtaining the engine speed at a preset time; detecting whether the engine speed at the preset time is within a set range; If the engine speed at the preset time is not within the set range, determining that the engine fuel distribution mode is a pure diesel combustion mode; If the engine speed at the preset moment is within the set range, obtaining the engine required torque at the preset moment, the engine speed and the engine required torque at the previous preset moment; Determining a torque deviation value, a speed change rate, and a torque change rate between the preset moment and the last preset moment based on the engine speed and engine demand torque at the preset moment and the engine speed and engine demand torque at the last preset moment; detecting whether the torque deviation value, the speed change rate, and the torque change rate are all less than respective set thresholds; If the torque deviation value, the speed change rate, and the torque change rate are all less than their respective set thresholds, determining that the engine fuel distribution mode is the ammonia-diesel steady-state blended combustion mode; If at least one of the torque deviation value, the speed change rate, and the torque change rate is not less than the respective set thresholds, it is determined that the engine fuel distribution mode is the transient co-combustion mode.

3. The method for distributing fuel for an ammonia-diesel engine according to claim 1, wherein: The step of determining the required torque of diesel and ammonia at the preset time according to the engine fuel distribution mode includes: When the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, determining the diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode; Determining the required torque of diesel and ammonia at the preset moment according to the engine required torque at the preset moment and the diesel and ammonia ratio coefficient at the preset moment; When the engine fuel distribution mode is the transient co-firing mode, obtaining the required torques of diesel and ammonia in the previous steady-state co-firing mode and the engine required torque in the previous steady-state co-firing mode; The engine demand torque at the preset moment is subtracted from the engine demand torque in the previous steady-state co-combustion mode to calculate a change in the engine demand torque at the preset moment; The diesel demand torque at the preset moment is determined based on the diesel demand torque in the previous steady-state co-combustion mode and the change in the engine demand torque at the preset moment; the ammonia demand torque at the preset moment is determined based on the ammonia demand torque in the previous steady-state co-combustion mode.

4. The method for distributing fuel for an ammonia-diesel engine according to claim 3, wherein: When the engine fuel distribution mode is a pure diesel combustion mode or an ammonia-diesel steady-state blended combustion mode, the step of determining the diesel and ammonia ratio coefficient at the preset time according to the engine fuel distribution mode includes: When the fuel distribution mode of the engine is a pure diesel combustion mode, the diesel ratio coefficient at the preset time is 1, and the ammonia ratio coefficient at the preset time is 0; When the fuel distribution mode of the engine is the ammonia-diesel steady-state blending mode, the diesel and ammonia ratio coefficient base MAP is queried according to the engine speed and engine required torque at a preset time to determine the diesel and ammonia ratio coefficient at the preset time.

5. The method for distributing fuel for an ammonia-diesel engine according to claim 3, wherein: determining the required torque of the diesel at the preset moment according to the required torque of the diesel in the previous steady-state co-firing mode and the change in the required torque of the engine at the preset moment; The step of determining the required torque of ammonia at the preset moment according to the required torque of ammonia in the previous steady-state co-combustion mode includes: detecting whether the engine demand torque change at the preset moment is less than an engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value; When the engine demand torque change at the preset moment is not less than the engine demand torque change threshold, the sum of the engine demand torque change at the preset moment and the diesel demand torque in the previous steady-state co-firing mode is used as the diesel demand torque at the preset moment; the ammonia demand torque in the previous steady-state co-firing mode is used as the ammonia demand torque at the preset moment.

6. The method for distributing fuel for an ammonia-diesel engine according to claim 5, wherein: After the step of detecting whether the engine demand torque change at the preset moment is less than the engine demand torque change threshold, wherein the engine demand torque change threshold is a negative value, the method further includes: When the engine demand torque change at the preset moment is less than the engine demand torque change threshold, the engine fuel distribution mode is reconfirmed to be the pure diesel combustion mode, and the step of determining the diesel and ammonia ratio coefficient at the preset moment according to the engine fuel distribution mode when the engine fuel distribution mode is the pure diesel combustion mode or the ammonia-diesel steady-state blended combustion mode is returned to.

7. A fuel distribution device for an ammonia diesel engine, characterized in that: The ammonia diesel engine fuel distribution device comprises: a first determining module, configured to determine an engine fuel distribution mode when the engine is at a preset time; a second determining module, configured to determine the required torques of diesel and ammonia at the preset moment according to the engine fuel distribution mode; a third determining module, configured to determine the amount of diesel fuel based on the required torque, thermal efficiency, calorific value of diesel fuel, and engine displacement at the preset time; and determine the amount of ammonia fuel based on the required torque, thermal efficiency, calorific value of ammonia fuel, and engine displacement at the preset time; The ammonia-diesel engine fuel distribution device further includes: an acquisition module for: According to the engine speed at a preset time, the pre-stored diesel and ammonia thermal efficiency basic MAP is searched to determine the diesel and ammonia basic thermal efficiency values; Correcting the diesel basic thermal efficiency value to determine the diesel thermal efficiency at a preset time; Correcting the basic thermal efficiency value of ammonia to determine the thermal efficiency of ammonia at a preset time; Obtain diesel calorific value, ammonia calorific value and engine displacement.

8. An ammonia diesel engine fuel distribution device, characterized in that: The ammonia-diesel engine fuel dispensing device includes a processor, a memory, and an ammonia-diesel engine fuel dispensing program stored on the memory and executable by the processor, wherein when the ammonia-diesel engine fuel dispensing program is executed by the processor, the steps of the ammonia-diesel engine fuel dispensing method as described in any one of claims 1 to 6 are implemented.

9. A readable storage medium, characterized in that: The readable storage medium stores an ammonia-diesel engine fuel distribution program, wherein when the ammonia-diesel engine fuel distribution program is executed by the processor, the steps of the ammonia-diesel engine fuel distribution method according to any one of claims 1 to 6 are implemented.

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