Fuel supply system, method, equipment and medium for engine

Abstract

The invention discloses a fuel supply system, method and equipment of an engine and a medium. The fuel supply system comprises a first fuel supply pipeline and a second fuel supply pipeline, a second delivery pump for pumping a second fuel; the adding device is provided with a second channel communicated with the output end of the second conveying pump and the first fuel supply pipeline, and the flow area of the second channel is adjustable; the control module is electrically connected with the second conveying pump and the adding device and used for determining the target adding amount of the second fuel based on the engine operation working condition; determining target traffic based on the target additive amount; and based on the target flow, the flow area of the second channel or the pumping pressure of the second conveying pump is controlled, so that the second fuel is conveyed to the first fuel supply pipeline at the target flow until the adding amount of the second fuel in the first fuel supply pipeline reaches the target adding amount. By the adoption of the system, diesel-free cold start is achieved, the complexity and cost of the system are reduced, the pause feeling in the fuel conversion process is eliminated, the combustion stability of an engine is improved, and the service life of the engine is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a fuel supply system, method, equipment and medium for an engine. Background Art

[0002] Existing methanol direct injection and compression ignition engines are usually equipped with two independent fuel supply systems, one for supplying methanol and the other for supplying diesel. Methanol is used as the main fuel, and during the cold start phase of the engine, the thermal engine effect of diesel is used to assist in starting, to ensure that the engine can smoothly enter the working state.

[0003] However, the design of this dual-fuel supply system increases the complexity and manufacturing cost of the system. In addition, during the fuel conversion process from diesel to methanol, due to the large differences in the combustion characteristics of the two fuels, it is difficult to achieve a smooth transition, which often causes the engine to run with a sense of frustration, affecting the driving experience and engine life.

[0004] Therefore, how to develop a simpler and more efficient fuel supply system to overcome the shortcomings of the existing system in terms of fuel supply and combustion performance is a technical problem that urgently needs to be solved. Summary of the invention

[0005] In view of the above problems, the present invention is proposed to provide a fuel supply system, method, equipment and medium for an engine that overcomes the above problems or at least partially solves the above problems. By setting an addition device and a precise control method, a diesel-free cold start is achieved, the system complexity and cost are reduced, the sense of frustration during the fuel conversion process is eliminated, and the engine combustion stability, driving experience and service life are improved.

[0006] In a first aspect, a fuel supply system for an engine is provided, the fuel supply system comprising:

[0007] A first fuel supply pipeline, used for delivering a first fuel;

[0008] a second delivery pump, for pumping a second fuel at a set pumping pressure, wherein the cetane number of the second fuel is greater than the cetane number of the first fuel;

[0009] an adding device, comprising a second channel, one end of the second channel being connected to the output end of the second delivery pump, the other end of the second channel being connected to the first fuel supply pipeline, and the flow area of ​​the second channel being adjustable;

[0010] A control module is electrically connected to the second delivery pump and the adding device, and is used to determine a target addition amount of the second fuel based on the engine operating conditions; determine a target flow rate of the second fuel based on the target addition amount; and control the flow area of ​​the second channel or the pumping pressure of the second delivery pump based on the target flow rate so that the second fuel is delivered to the first fuel supply pipeline at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline reaches the target addition amount.

[0011] Optionally, the control module is further used for:

[0012] obtaining a first pumping pressure of a first fuel and a second pumping pressure of a second fuel;

[0013] When the second pumping pressure is greater than the first pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the flow area of ​​the second channel, determining the flow area of ​​the second channel corresponding to the target flow rate as a target flow area; and controlling the adding device to adjust the flow area of ​​the second channel to the target flow area based on the target flow area;

[0014] When the second pumping pressure is less than or equal to the second pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the pumping pressure of the second delivery pump, the pumping pressure of the second delivery pump corresponding to the target flow rate is determined as the target pumping pressure; based on the target pumping pressure, the second delivery pump is controlled to adjust the pumping pressure of the second delivery pump to the target pumping pressure.

[0015] Optionally, the engine operating conditions include cold start conditions, load conditions and high temperature conditions;

[0016] The control module is used for:

[0017] obtaining a pre-calibrated target injection amount of the mixed fuel;

[0018] When the engine is in the cold start condition, determining the target addition amount as a first target addition amount, wherein the first target addition amount is a% of a target injection amount of the mixed fuel;

[0019] When the engine is in the load condition, determining the target addition amount as a second target addition amount, wherein the second target addition amount is b% of the target injection amount of the mixed fuel;

[0020] When the engine is in the high temperature condition, the target addition amount is determined to be a third target addition amount, and the third target addition amount is c% of the target injection amount of the mixed fuel, where c<b<a.

[0021] Optionally, the control module is used to:

[0022] When the engine is in the load condition, current engine operation data is acquired, and based on a pre-calibrated mapping relationship between the engine operation data and the second fuel addition amount, the second fuel addition amount corresponding to the current engine operation data is determined as the second target addition amount;

[0023] The current engine operation data at least includes the current engine speed and the current engine load.

[0024] Optionally, the control module is further used for:

[0025] obtaining the engine water temperature;

[0026] When the engine water temperature is less than a first temperature threshold, determining that the vehicle is in the cold start condition;

[0027] When the engine water temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, determining that the engine is in the load condition;

[0028] When the engine water temperature is greater than or equal to the second temperature threshold, it is determined that the engine is in the high temperature operating condition.

[0029] Optionally, the first fuel is methanol, and the second fuel is one of isooctyl nitrate, ethylene glycol dinitrate or di-tert-butyl peroxide.

[0030] Optionally, the first fuel supply pipeline includes a coarse filter, a first delivery pump, a fine filter, a high-pressure pump, a fuel rail and a fuel injector which are connected in sequence;

[0031] The other end of the second passage is communicated with an output end of the fine filter and an output end of the high-pressure pump.

[0032] In a second aspect, a fuel supply method for an engine is provided, using the fuel supply system according to the first aspect, the fuel supply method comprising:

[0033] Determining a target addition amount of the second fuel based on the engine operating condition;

[0034] determining a target flow rate of the second fuel based on the target addition amount;

[0035] Based on the target flow rate, the flow area of ​​the second passage or the pumping pressure of the second delivery pump is adjusted so that the second fuel is delivered to the first fuel supply pipeline at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline reaches the target addition amount.

[0036] In a third aspect, an electronic device is provided, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the fuel supply method as described in the first aspect by executing the computer instructions.

[0037] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the fuel supply method as described in the first aspect.

[0038] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0039] The embodiment of the present invention provides a fuel supply system, method, device and storage medium for an engine. By setting an addition device and a second delivery pump, the second fuel can be introduced into the first fuel supply pipeline, and the flow area of ​​the second channel for the second fuel to flow in the addition device is adjustable. The control module can adjust the flow area of ​​the second channel or the pumping pressure of the second delivery pump according to the determined target addition amount of the second fuel, so that the flow rate of the second fuel can be accurately controlled to ensure that the addition amount of the mixed second fuel reaches the target addition amount, and ensure that the composition of the mixed fuel is stable and meets the engine requirements. Since the cetane number of the second fuel is greater than the cetane number of the first fuel, the increase in its addition amount helps to improve the ignition point of the mixed fuel. Therefore, the control module of the present invention adjusts the addition amount of the second fuel in real time based on the engine operating conditions, so that the engine can maintain stable combustion under a wider range of conditions such as cold engine start conditions, and achieves cold start without diesel, which solves the problem that the existing engine needs to rely on diesel heat engine assistance when starting a cold engine. It can be seen that the present invention only needs to set up one fuel supply system, and there is no need to equip another diesel supply system as in the prior art. This not only reduces the complexity and manufacturing cost of the system, but also eliminates the fuel conversion process from diesel to methanol in the engine, effectively eliminates the engine's frustration, improves the driving experience and extends the engine's service life.

[0040] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0042] Figure 1 is a structural schematic diagram of a fuel supply system for an engine provided by an embodiment of the present invention;

[0043] Figure 2 is a structural schematic diagram of an adding device provided by an embodiment of the present invention;

[0044] Figure 3 It is a flow chart of a fuel supply method for an engine provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to better understand the above-mentioned technical scheme, the above-mentioned technical scheme will be described in detail below in combination with the accompanying drawings and specific implementation methods of the specification. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0046] Figure 1 is a schematic diagram of the structure of a fuel supply system for an engine provided by an embodiment of the present invention, such as Figure 1 As shown, the fuel supply system of the engine includes a first fuel supply pipeline 10 , a second delivery pump 20 , an adding device 30 and a control module 40 .

[0047] The first fuel supply pipeline 10 is used to deliver the first fuel. The second delivery pump 20 is used to pump the second fuel at a set pumping pressure, and the cetane number of the second fuel is greater than the cetane number of the first fuel. The adding device 30 has a second channel, one end of the second channel is connected to the output end of the second delivery pump, and the other end of the second channel is connected to the first fuel supply pipeline, and the flow area of ​​the second channel is adjustable. The control module 40 is electrically connected to the second delivery pump 20 and the adding device 30, and is used to determine the target addition amount of the second fuel based on the engine operating conditions; based on the target addition amount, determine the target flow rate of the second fuel; based on the target flow rate, control the flow area of ​​the second channel or the pumping pressure of the second delivery pump 20, so that the second fuel is delivered to the first fuel supply pipeline 10 at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline 10 reaches the target addition amount.

[0048] In some implementations, the first fuel is methanol, and the second fuel is one of isooctyl nitrate, ethylene glycol dinitrate, or di-tert-butyl peroxide. The second fuel is mixed with the first fuel to increase the cetane number of methanol, reduce the ignition point, and shorten the ignition time.

[0049] like Figure 1 As shown, in some implementations, the first fuel supply pipeline 10 includes a coarse filter 11, a first delivery pump 12, a fine filter 13, a high-pressure pump 14, a fuel rail 15, and a fuel injector 16 that are connected in sequence. The other end of the second channel is connected to the output end of the fine filter 13 and the output end of the high-pressure pump 14.

[0050] Among them, the coarse filter 11 can be used to filter out large particle impurities and moisture in the first fuel, the first delivery pump 12 is used to provide a set pumping pressure for the first fuel, the fine filter 13 is used to further filter out tiny particle impurities in the first fuel, the high-pressure pump 14 is used to provide a set pumping pressure for the mixed first fuel and second fuel, the main function of the oil rail 15 is to store fuel and suppress pressure fluctuations generated by the high-pressure pump and the injector to ensure system pressure stability, and the injector 16 is responsible for spraying the mixed fuel into the engine combustion chamber in the form of mist.

[0051] In some implementations, the adding device 30 further has a connected first channel, the first channel is connected in series to the first fuel supply pipeline 10, and the other end of the second channel is connected to the first channel. In this implementation, the second fuel can be transported to the first channel through the second channel, and then flow into the first fuel supply pipeline 10 from the first channel to mix with the first fuel.

[0052] Figure 2 is a schematic diagram of the structure of an adding device provided by an embodiment of the present invention, such as Figure 2 As shown, the adding device 30 includes a housing 31 , a proportional valve body 32 and a valve body adjusting unit 33 .

[0053] The housing 31 has a first inlet A1, a second inlet A2 and a fuel outlet P. A sealed chamber S is formed in the housing 31, and the sealed chamber S is connected to the fuel outlet P. The proportional valve body 32 is located in the housing 31, and has a first connecting groove B1 and a second connecting groove B2. The first inlet A1, the first connecting groove B1, the sealed chamber S and the fuel outlet P are connected in sequence to form a first channel, and the second inlet A2, the second connecting groove B2 and the sealed chamber S are connected to form a second channel. The valve body adjustment unit 33 is located in the housing 31, connected to the proportional valve body 32, and is used to adjust the position of the proportional valve body 32, change the connecting area between the second inlet A2 and the second connecting groove B2, and between the second connecting groove B2 and the sealed chamber S, so as to adjust the flow area of ​​the second channel.

[0054] In some implementations, the valve body adjustment unit 33 may be a stepper motor, and the output shaft of the stepper motor is in transmission connection with the proportional valve body 32, so as to drive the proportional valve body 32 to rotate synchronously. The valve body adjustment unit 33 is electrically connected to the control module 40, and the control module 40 may adjust the number of motor steps of the stepper motor by controlling the motor current of the stepper motor to drive the proportional valve body to rotate around the axis at a set angle, and the communication area between the second inlet A2 and the second communicating groove B2, and between the second communicating groove B2 and the sealed chamber S may be changed by changing the rotation position, thereby adjusting the flow area of ​​the second channel.

[0055] Optionally, the control module 40 is further configured to:

[0056] obtaining a first pumping pressure of a first fuel and a second pumping pressure of a second fuel;

[0057] When the second pumping pressure is greater than the first pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the flow area of ​​the second channel, the flow area of ​​the second channel corresponding to the target flow rate is determined as the target flow area; based on the target flow area, the adding device is controlled to adjust the flow area of ​​the second channel to the target flow area;

[0058] When the second pumping pressure is less than or equal to the second pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the pumping pressure of the second delivery pump, the pumping pressure of the second delivery pump corresponding to the target flow rate is determined as the target pumping pressure; based on the target pumping pressure, the second delivery pump is controlled to adjust the pumping pressure of the second delivery pump to the target pumping pressure.

[0059] For example, a pressure sensor can be provided at the output end of the first delivery pump on the first fuel supply pipeline 10 to obtain the first pumping pressure of the first fuel; and a pressure sensor can be provided at the output end of the second delivery pump to obtain the second pumping pressure of the second fuel. The mapping relationship between the flow rate of the second fuel and the flow area of ​​the second channel, and the pre-calibrated mapping relationship between the flow rate of the second fuel and the pumping pressure of the second delivery pump can be pre-calibrated by a person skilled in the art through a calibration experiment. For example, the flow rate of the second fuel corresponding to different flow areas of the second channel and different pumping pressures of the second delivery pump can be pre-determined through simulation, so as to tabulate the determined mapping relationship, and the target flow area and target pumping pressure corresponding to the target flow rate can be determined by looking up the table.

[0060] In a specific implementation, the control module 40 can generate a first control instruction including a target flow area and send it to the adding device. After receiving the first control instruction, the adding device can adjust the flow area of ​​the second channel to the target flow area according to the first control instruction. The control module 40 can generate a second control instruction including a target pumping pressure and send it to the second delivery pump. After receiving the second control instruction, the second delivery pump can adjust the pumping pressure of the second delivery pump to the target pumping pressure according to the second control instruction.

[0061] Optionally, the engine operating conditions include cold start conditions, load conditions and high temperature conditions.

[0062] The control module 40 is used for:

[0063] Obtain a pre-calibrated target injection amount of the mixed fuel; when the engine is in a cold start condition, determine the target addition amount to be a first target addition amount, which is a% of the target injection amount of the mixed fuel; when the engine is in a load condition, determine the target addition amount to be a second target addition amount, which is b% of the target injection amount of the mixed fuel; when the engine is in a high temperature condition, determine the target addition amount to be a third target addition amount, which is c% of the target injection amount of the mixed fuel, c<b<a.

[0064] The specific value ranges of a, b, and c can be obtained by the staff through pre-calibration through experiments to ensure the combustion effect of the engine. For example, a% can be 6% to 8%, b% can be 3% to 5%, and c% can be 0%.

[0065] In some implementations, the target injection amount of the mixed fuel can be calculated by the control module 40 based on a preset algorithm and calibration data. It is usually necessary to comprehensively consider the engine's operating conditions, performance requirements, accuracy of the fuel injection system, and the quality of methanol. This is a conventional technology and will not be elaborated here.

[0066] In some implementations, the control module 40 is configured to:

[0067] When the engine is in a load condition, the current operating data of the engine is obtained, and based on a pre-calibrated mapping relationship between the engine operating data and the second fuel addition amount, the second fuel addition amount corresponding to the current operating data of the engine is determined as the second target addition amount; wherein the current operating data of the engine includes at least the current engine speed and the current engine load.

[0068] Based on the engine speed and load, the specific value of the second target addition amount is determined within the b% range of the target injection amount of the mixed fuel, so that the second fuel addition amount can be more in line with the engine requirements. The mapping relationship between the engine operation data and the second fuel addition amount can be pre-calibrated by the staff to ensure that the second fuel addition amount meets the engine requirements.

[0069] In some implementations, the target addition amount can also be adjusted based on the knock index to optimize the combustion process, improve engine performance, reduce emission pollution, and improve engine stability and reliability. In a specific implementation, after the second fuel is added according to the target addition amount, the knock index detected by the knock sensor can be obtained, and the detected knock index can be compared with the preset knock index. If the detected knock index does not reach the preset knock index, the target addition amount can be adjusted until the detected knock index does not reach the preset knock index.

[0070] In some implementations, the control module 40 is further configured to:

[0071] Obtain the engine water temperature; when the engine water temperature is less than a first temperature threshold, determine that the vehicle is in a cold start condition; when the engine water temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, determine that the engine is in a load condition; when the engine water temperature is greater than or equal to the second temperature threshold, determine that the engine is in a high temperature condition.

[0072] By obtaining the engine water temperature and judging the temperature condition of the engine, the target amount of the second fuel to be added can be determined. This allows the engine to add more second fuel during, for example, a cold start phase without the need for diesel, and no second fuel needs to be added during a high temperature phase, thereby helping to optimize combustion efficiency and improve engine stability and reliability.

[0073] In some implementations, the control module 40 may be an engine control unit (Electronic Control Unit, ECU) to implement the above control process.

[0074] Based on the same inventive concept, an embodiment of the present invention further provides a fuel supply method for an engine, which adopts the fuel supply system as described in the above embodiment. The execution body of the fuel supply method can be a control module 40. Figure 3 is a flow chart of a fuel supply method for an engine provided by an embodiment of the present invention, such as Figure 3 As shown, the fuel supply method includes:

[0075] Step S310: Determine a target addition amount of the second fuel based on the engine operating condition.

[0076] In some implementations, the engine operating conditions include cold start conditions, load conditions, and high temperature conditions, and step S310 includes:

[0077] obtaining a pre-calibrated target injection amount of the mixed fuel;

[0078] When the engine is in a cold start condition, the target addition amount is determined to be a first target addition amount, and the first target addition amount is a% of the target injection amount of the mixed fuel;

[0079] When the engine is in a load condition, the target addition amount is determined to be a second target addition amount, and the second target addition amount is b% of the target injection amount of the mixed fuel;

[0080] When the engine is in a high temperature condition, the target addition amount is determined to be a third target addition amount, and the third target addition amount is c% of the target injection amount of the mixed fuel, where c<b<a.

[0081] For example, a% may be 6% to 8%, b% may be 3% to 5%, and c% may be 0%.

[0082] In some implementations, step S310 may further include:

[0083] When the engine is in a load condition, the current operating data of the engine is obtained, and based on a pre-calibrated mapping relationship between the engine operating data and the second fuel addition amount, the second fuel addition amount corresponding to the current operating data of the engine is determined as the second target addition amount; wherein the current operating data of the engine includes at least the current engine speed and the current engine load.

[0084] Based on the engine speed and load, the specific value of the second target addition amount is determined within the b% range of the target injection amount of the mixed fuel, so that the second fuel addition amount can be more in line with the engine requirements. The mapping relationship between the engine operation data and the second fuel addition amount can be pre-calibrated by the staff to ensure that the second fuel addition amount meets the engine requirements.

[0085] In some implementations, before executing step S310, the fuel supply method may further include:

[0086] Obtain the engine water temperature; when the engine water temperature is less than a first temperature threshold, determine that the vehicle is in a cold start condition; when the engine water temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, determine that the engine is in a load condition; when the engine water temperature is greater than or equal to the second temperature threshold, determine that the engine is in a high temperature condition.

[0087] Step S320: Determine a target flow rate of the second fuel based on the target addition amount.

[0088] In some implementations, the target flow rate Q may be determined based on the target addition amount W and the preset addition time t, that is, Q=w / t. The addition time t may be set by a technician according to actual needs.

[0089] Step S330: Based on the target flow rate, adjust the flow area of ​​the second channel or the pumping pressure of the second delivery pump so that the second fuel is delivered to the first fuel supply pipeline at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline reaches the target addition amount.

[0090] In some implementations, step S330 includes:

[0091] obtaining a first pumping pressure of a first fuel and a second pumping pressure of a second fuel;

[0092] When the second pumping pressure is greater than the first pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the flow area of ​​the second channel, the flow area of ​​the second channel corresponding to the target flow rate is determined as the target flow area; based on the target flow area, the adding device is controlled to adjust the flow area of ​​the second channel to the target flow area;

[0093] When the second pumping pressure is less than or equal to the second pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the pumping pressure of the second delivery pump, the pumping pressure of the second delivery pump corresponding to the target flow rate is determined as the target pumping pressure; based on the target pumping pressure, the second delivery pump is controlled to adjust the pumping pressure of the second delivery pump to the target pumping pressure.

[0094] In a specific implementation, the control module can generate a first control instruction including a target flow area and send it to the adding device. After receiving the first control instruction, the adding device can adjust the flow area of ​​the second channel to the target flow area according to the first control instruction. The control module can generate a second control instruction including a target pumping pressure and send it to the second delivery pump. After receiving the second control instruction, the second delivery pump can adjust the pumping pressure of the second delivery pump to the target pumping pressure according to the second control instruction.

[0095] In some implementations, the fuel supply method may further include:

[0096] The target addition amount is adjusted based on the knock index.

[0097] In specific implementation, after the second fuel is added according to the target addition amount, the knock index detected by the knock sensor can be obtained, and the detected knock index can be compared with the preset knock index. If the detected knock index does not reach the preset knock index, the target addition amount can be adjusted until the detected knock index does not reach the preset knock index.

[0098] The specific details of the fuel supply system involved in the above-mentioned fuel supply method can be understood by referring to the corresponding related descriptions and effects in the above-mentioned fuel supply system embodiment, and will not be repeated here.

[0099] Based on the same inventive concept as the above-mentioned fuel supply method, the present invention also provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be connected to each other by bus or other means. The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components and other chips, or a combination of the above-mentioned various types of chips. The memory, as a non-transient computer-readable storage medium, may be used to store non-transient software programs, non-transient computer executable programs and modules, such as program instructions / modules corresponding to the fuel supply method in the embodiment of the present invention. The processor executes various functional applications and data processing of the processor by running the non-transient software programs, instructions and modules stored in the memory, i.e., realizing the fuel supply method in the above-mentioned method embodiment.

[0100] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. The one or more modules are stored in the memory, and when executed by the processor, the execution is as follows: Figure 3 The fuel supply method in the illustrated embodiment.

[0101] For details of the above electronic equipment, please refer to Figure 3 The corresponding related descriptions and effects in the illustrated embodiments can be understood and will not be repeated here.

[0102] Based on the same inventive concept as the fuel supply method, the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and the computer program instructions are used to enable a computer to execute the fuel supply method in the above embodiment.

[0103] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0104] The technical solutions provided in the above embodiments of the present application have at least the following technical effects or advantages:

[0105] The embodiment of the present invention provides a fuel supply system, method, device and storage medium for an engine. By setting an addition device and a second delivery pump, the second fuel can be introduced into the first fuel supply pipeline, and the flow area of ​​the second channel for the second fuel to flow in the addition device is adjustable. The control module can adjust the flow area of ​​the second channel or the pumping pressure of the second delivery pump according to the determined target addition amount of the second fuel, so that the flow rate of the second fuel can be accurately controlled to ensure that the addition amount of the mixed second fuel reaches the target addition amount, and ensure that the composition of the mixed fuel is stable and meets the engine requirements. Since the cetane number of the second fuel is greater than the cetane number of the first fuel, the increase in its addition amount helps to improve the ignition point of the mixed fuel. Therefore, the control module of the present invention adjusts the addition amount of the second fuel in real time based on the engine operating conditions, so that the engine can maintain stable combustion under a wider range of conditions such as cold engine start conditions, and achieves cold start without diesel, which solves the problem that the existing engine needs to rely on diesel heat engine assistance when starting a cold engine. It can be seen that the present invention only needs to set up one fuel supply system, and there is no need to equip another diesel supply system as in the prior art. This not only reduces the complexity and manufacturing cost of the system, but also eliminates the fuel conversion process from diesel to methanol in the engine, effectively eliminates the engine's frustration, improves the driving experience and extends the engine's service life.

[0106] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0107] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0108] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A fuel supply system for an engine, characterized in that: The fuel supply system comprises: A first fuel supply pipeline, used for delivering a first fuel; a second delivery pump, for pumping a second fuel at a set pumping pressure, wherein the cetane number of the second fuel is greater than the cetane number of the first fuel; an adding device, comprising a second channel, one end of the second channel being connected to the output end of the second delivery pump, the other end of the second channel being connected to the first fuel supply pipeline, and the flow area of ​​the second channel being adjustable; A control module is electrically connected to the second delivery pump and the adding device, and is used to determine a target addition amount of the second fuel based on the engine operating conditions; determine a target flow rate of the second fuel based on the target addition amount; and control the flow area of ​​the second channel or the pumping pressure of the second delivery pump based on the target flow rate so that the second fuel is delivered to the first fuel supply pipeline at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline reaches the target addition amount.

2. The fuel supply system according to claim 1, characterized in that: The control module is also used for: obtaining a first pumping pressure of a first fuel and a second pumping pressure of a second fuel; When the second pumping pressure is greater than the first pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the flow area of ​​the second channel, determining the flow area of ​​the second channel corresponding to the target flow rate as a target flow area; Based on the target flow area, controlling the adding device to adjust the flow area of ​​the second channel to the target flow area; When the second pumping pressure is less than or equal to the second pumping pressure, based on a pre-calibrated mapping relationship between the flow rate of the second fuel and the pumping pressure of the second delivery pump, determining the pumping pressure of the second delivery pump corresponding to the target flow rate as the target pumping pressure; The second delivery pump is controlled based on the target pumping pressure to adjust the pumping pressure of the second delivery pump to the target pumping pressure.

3. The fuel supply system according to claim 1, characterized in that: The engine operating conditions include cold start conditions, load conditions and high temperature conditions; The control module is used for: obtaining a pre-calibrated target injection amount of the mixed fuel; When the engine is in the cold start condition, determining the target addition amount as a first target addition amount, wherein the first target addition amount is a% of a target injection amount of the mixed fuel; When the engine is in the load condition, determining the target addition amount as a second target addition amount, wherein the second target addition amount is b% of the target injection amount of the mixed fuel; When the engine is in the high temperature condition, the target addition amount is determined to be a third target addition amount, and the third target addition amount is c% of the target injection amount of the mixed fuel, where c<b<a.

4. The fuel supply system according to claim 3, characterized in that: The control module is used for: When the engine is in the load condition, current engine operation data is acquired, and based on a pre-calibrated mapping relationship between the engine operation data and the second fuel addition amount, the second fuel addition amount corresponding to the current engine operation data is determined as the second target addition amount; The current engine operation data at least includes the current engine speed and the current engine load.

5. The fuel supply system according to claim 3, characterized in that: The control module is also used for: obtaining the engine water temperature; When the engine water temperature is less than a first temperature threshold, determining that the vehicle is in the cold start condition; When the engine water temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, determining that the engine is in the load condition; When the engine water temperature is greater than or equal to the second temperature threshold, it is determined that the engine is in the high temperature operating condition.

6. The fuel supply system according to claim 1, characterized in that: The first fuel is methanol, and the second fuel is one of isooctyl nitrate, ethylene glycol dinitrate or di-tert-butyl peroxide.

7. The fuel supply system according to claim 1, characterized in that: The first fuel supply pipeline includes a coarse filter, a first delivery pump, a fine filter, a high-pressure pump, a fuel rail and a fuel injector which are connected in sequence; The other end of the second passage is communicated with an output end of the fine filter and an output end of the high-pressure pump.

8. A method for supplying fuel to an engine, characterized in that: Using the fuel supply system according to any one of claims 1 to 7, the fuel supply method comprises: Determining a target addition amount of the second fuel based on the engine operating condition; determining a target flow rate of the second fuel based on the target addition amount; Based on the target flow rate, the flow area of ​​the second passage or the pumping pressure of the second delivery pump is adjusted so that the second fuel is delivered to the first fuel supply pipeline at the target flow rate until the addition amount of the second fuel in the first fuel supply pipeline reaches the target addition amount.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the fuel supply method as claimed in claim 8 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions for causing the computer to execute the fuel supply method of claim 8 .

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