A method, device, equipment and medium for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle

Abstract

The present invention provides a method, device, equipment and medium for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, belonging to the field of commercial vehicle fuel supply technology, and the method steps are as follows: obtaining a feasible installation position interval of the fuel injection pump on the return pipe between the engine and the main tank; converting the feasible installation position interval into installation position parameters, and constructing an engine return oil system simulation model for determining the installation position of the fuel injection pump based on the installation position parameters; simulating the engine return oil system simulation model, and determining the installation position of the fuel injection pump on the return oil pipe according to the simulation results. The present invention solves the application problem of the fuel injection pump on a high-pressure common rail engine dual-tank commercial vehicle by determining the installation position of the fuel injection pump to meet a reasonable oil suction volume to fully utilize the capacity of the two tanks, while the outlet pressure of the engine oil pump does not exceed the limit value.

Description

Technical Field

[0001] The invention belongs to the technical field of commercial vehicle fuel supply, and relates to a method, a device, equipment and a medium for determining the installation position of a fuel injection pump of a dual-tank commercial vehicle. Background Art

[0002] The high-pressure common rail engine is the most widely used engine type in commercial vehicles. The oil pump of the high-pressure common rail engine is connected to the engine shaft. When the engine rotates, it drives the oil pump to suck oil from the fuel tank. A part of it is used for engine consumption, and the rest returns to the fuel tank along the return oil pipe. Some commercial vehicles equipped with high-pressure common rail engines are equipped with two fuel tanks to increase the cruising range. The specific working method is to replenish fuel from the auxiliary fuel tank to the main fuel tank through the fuel jet pump. In this working method, the engine oil pump sucks oil from the main fuel tank, and the fuel jet pump replenishes oil from the auxiliary fuel tank to the main fuel tank. The fuel jet pump needs to be installed on the return oil line between the engine oil pump and the main fuel tank, and uses the engine return oil to drive itself to suck fuel from the auxiliary fuel tank to replenish the main fuel tank. This working method has a simple structure, low cost and high reliability.

[0003] The installation position of the fuel jet pump will affect its ability to absorb fuel from the auxiliary tank. At present, problems caused by unreasonable installation positions often occur. For example, if the fuel jet pump does not absorb enough fuel from the auxiliary tank, there will still be residual fuel in the auxiliary tank when the engine sucks out the fuel in the main tank. The fuel in the auxiliary tank cannot be fully utilized, and the dual tank endurance advantage cannot be fully utilized. The fuel jet pump absorbs more fuel from the auxiliary tank than the engine fuel consumption, resulting in an increase in the main tank fuel volume and fuel overflow. In addition, an unreasonable installation position of the fuel jet pump will also cause the engine oil pump outlet pressure generated when the fuel jet pump is working to exceed the limit value, thereby causing engine failure. Therefore, how to quickly and accurately determine the installation position of the fuel jet pump, so as to control the fuel jet pump's oil absorption and the engine oil pump outlet pressure, is a difficult problem in the application of fuel jet pumps. Currently, the installation position of the fuel jet pump is determined by experiments. Since the fuel capacity of a double-tank commercial vehicle is as high as more than 1,000 liters, it is costly and time-consuming to determine the installation position of the fuel jet pump simply by experiments. In addition, the test method can only select a few installation points for testing, which may not be the optimal position within the installation range. Summary of the invention

[0004] In a first aspect, an embodiment of the present application provides a method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, comprising the following steps: S1. Obtaining a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; S2. Converting the feasible installation position interval into installation position parameters, and constructing an engine oil return system simulation model for determining the installation position of the fuel jet pump based on the installation position parameters; S3. Simulate the engine oil return system simulation model, and determine the installation position of the fuel jet pump on the oil return pipe according to the simulation results.

[0005] Furthermore, the specific steps of step S1 are as follows: S11. Determine the main tank float position and the auxiliary tank float position for a dual-tank commercial vehicle equipped with a high-pressure common rail engine; S12. The position between the main tank float and the auxiliary tank float on the oil return line is used as the feasible installation position interval of the fuel jet pump. The method for determining the feasible installation position interval of the fuel jet pump is clarified, that is, it is determined based on the position of the main tank float and the auxiliary tank float, which provides a basis for the subsequent simulation model construction.

[0006] Furthermore, the specific steps of step S2 are as follows: S21. Constructing a simulation model of the engine oil return system for determining the installation position of the fuel jet pump; S22. Introducing a sub-model of a component in the engine oil return system simulation model; S23. Establish the connection relationship between the sub-models of the components in the engine oil return system simulation model according to the actual situation, and configure the engine oil return system simulation model to run the engine fixed working condition and cycle road spectrum operation function, as well as the engine oil return system simulation model to calculate the oil pressure at each position and monitor the fuel flow and fuel tank liquid level height; S24. Setting the installation position parameter interface of the engine oil return system simulation model, and importing the feasible installation position interval of the fuel jet pump through the installation position parameter interface; S25. Set the output parameters of the engine oil return system simulation model. The construction process of the engine oil return system simulation model is described in detail, including the introduction of component sub-models, the establishment of connection relationships, the configuration of operating functions and output parameters, etc., which provides a guarantee for the accuracy of the simulation results.

[0007] Further, the components in step S22 include an engine, a fuel return pipe, a fuel jet pump, a main fuel tank, a main fuel tank float, a subsidiary fuel tank, a subsidiary fuel tank float, a main fuel tank pipe, and a subsidiary fuel tank pipe; The output parameters in step S25 include the outlet oil pressure of the engine oil pump, the amount of oil sucked from the auxiliary tank by the fuel jet pump, the engine fuel consumption, the main tank liquid level height and the auxiliary tank liquid level height. Clarifying the specific content of the components in the simulation model and the specific indicators of the output parameters is the basis for the interpretation and analysis of the simulation results.

[0008] Furthermore, the specific steps of step S3 are as follows: S31. Execute the simulation model of the engine oil return system, adjust the specific installation position within the feasible installation position range of the fuel jet pump, and use the output parameters corresponding to each installation position as the simulation result; S32. Determine the farthest installation position of the fuel injection pump on the oil pipe circuit according to the output parameters of the engine fuel consumption, the fuel injection pump from the auxiliary fuel tank and the engine oil pump outlet oil pressure; S33 obtains the pre-selected minimum engine fuel consumption ratio N%, combined with the engine fuel consumption, the fuel injection pump from the auxiliary tank to determine the fuel injection pump on the fuel line circuit the nearest installation position; S34. Select the actual installation position of the fuel injection pump on the oil pipe loop between the farthest installation position and the nearest installation position. Provides specific simulation steps and judgment basis, and determines the farthest and nearest installation positions by adjusting the installation position and observing the changes in output parameters, providing a basis for subsequent selection of the actual installation position.

[0009] Furthermore, the specific steps of step S32 are as follows: S321. Determine the output parameters in the simulation process, in which the state M1 of the fuel injection pump sucking amount from the auxiliary fuel tank = 100% of the engine fuel consumption corresponds to the installation position Z1 of the fuel injection pump on the return pipe and the engine oil pump outlet oil pressure P1; S322. Determine whether the engine oil pump outlet oil pressure P1 corresponding to the state M1 is greater than the engine oil pump outlet pressure limit value Pmax; If yes, go to step S233; If not, it is determined that the installation position Z1 of the fuel jet pump on the oil return pipe is the farthest installation position of the fuel jet pump on the oil pipe loop, and the process goes to step S33; S323. Determine that the state M2 of the output parameter of the simulation process in which the outlet oil pressure of the engine oil pump is the outlet pressure limit value Pmax of the engine oil pump corresponds to the installation position Z2 of the fuel injection pump on the oil return pipe as the farthest installation position of the fuel injection pump on the oil pipe loop; The specific steps of step S33 are as follows: S331. Determine the output parameters in the simulation process, in which the fuel injection pump sucks fuel from the auxiliary tank = N% of the engine fuel consumption, and the state M3 corresponds to the installation position Z3 of the fuel injection pump on the return pipe; S332. Determine the installation position Z3 of the fuel injection pump on the oil return pipe as the nearest installation position of the fuel injection pump on the oil pipe loop. Determine the specific steps and judgment conditions of the farthest and nearest installation positions, especially considering the limit value of the oil pressure at the outlet of the engine oil pump, to ensure the rationality and safety of the installation position.

[0010] Further, in step S331, N% is 50%; In step S34, the middle position between the farthest installation position and the nearest installation position is selected as the best actual installation position of the fuel injection pump on the oil pipe loop. By setting the value of N% to 50% and selecting the middle position between the farthest and nearest installation positions as the best actual installation position, a simple and effective method for determining the installation position of the fuel injection pump is implemented, ensuring the performance and efficiency of the fuel injection pump.

[0011] In a second aspect, the embodiment of the present application further provides a device for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, comprising: A feasible installation position acquisition unit, used to acquire a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; An engine oil return system simulation model building unit, used for converting a feasible installation position interval into an installation position parameter, and building an engine oil return system simulation model for determining the installation position of a fuel jet pump based on the installation position parameter; The fuel injection pump installation position determination unit is used to simulate the engine oil return system simulation model and determine the installation position of the fuel injection pump on the oil return pipe according to the simulation results.

[0012] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle as described in the first aspect are implemented.

[0013] In a fourth aspect, an embodiment of the present application further provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle as described in the first aspect.

[0014] It can be seen from the above technical solutions that the present invention has the following advantages: The method, device, equipment and medium for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle provided in the present application can determine the setting position of the fuel injection pump on the return pipe according to the simulation results of the engine return oil system simulation model, so as to avoid engine failure caused by the outlet pressure of the high-pressure common rail engine oil pump exceeding the safety limit due to inappropriate installation position of the fuel injection pump, or the fuel injection pump sucking too much oil from the auxiliary tank causing oil overflow from the main tank, or the fuel injection pump sucking too little oil from the auxiliary tank causing the auxiliary tank capacity to be unable to be fully utilized, thereby improving vehicle performance and ensuring vehicle operation reliability. At the same time, determining the installation position of the jet pump by simulation can shorten the design cycle of the vehicle fuel supply system and reduce design costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 The present invention is a flow chart of an embodiment of a method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle.

[0017] Figure 2 The figure is a flow chart of another embodiment of the method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle of the present invention.

[0018] Figure 3 The present invention is a schematic diagram of a device for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle.

[0019] Figure 4 The diagram is a schematic diagram of the engine oil return system of a dual-tank commercial vehicle of the present invention.

[0020] 1. High-pressure common rail engine; 2. Main fuel tank; 3. Auxiliary fuel tank; 4. Main fuel tank float; 5. Auxiliary fuel tank float; 6. Fuel jet pump; 7. Oil return pipe; 8. Auxiliary fuel tank pipe; 9. Engine oil suction pipe. DETAILED DESCRIPTION

[0021] Various embodiments of the present disclosure will be described more fully in the method for determining the installation position of the fuel injection pump of a fuel tank commercial vehicle, which will be described in detail below. The present disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but rather the present disclosure should be understood to cover all adjustments, equivalents and / or alternatives that fall within the spirit and scope of the various embodiments of the present disclosure.

[0022] For example, as the mainstream power source in the current commercial vehicle field, the operating mechanism of the high-pressure common rail engine involves the linkage between the oil pump and the engine shaft, that is, the fuel is drawn from the fuel tank for the engine to use, and the unconsumed fuel is returned to the fuel tank through the return pipe. In response to the needs of long-distance driving, some commercial vehicles adopt a dual fuel tank design, that is, a main fuel tank and a sub-tank configuration, and the fuel is replenished from the sub-tank to the main tank through a fuel jet pump to increase the driving distance. In this system design, the engine oil pump is responsible for drawing fuel from the main tank, while the fuel jet pump cleverly uses the power of the engine return oil to draw fuel from the sub-tank and inject it into the main tank. The entire system is both economical and efficient.

[0023] However, the installation position of the fuel jet pump is crucial to its performance, and improper installation often leads to a series of problems. For example, if the suction capacity is insufficient, the fuel in the auxiliary tank will not be fully transferred to the main tank, resulting in fuel waste; conversely, if the suction volume is too large, the fuel in the main tank may overflow. In addition, an unreasonable installation position may also cause the outlet pressure of the engine oil pump to exceed the standard, thereby threatening the normal operation of the engine. Therefore, accurately determining the installation position of the fuel jet pump to balance its suction volume and the outlet pressure of the engine oil pump has become a major challenge in practical applications.

[0024] At present, the method for determining the installation position of the fuel jet pump mainly relies on experiments, but this method has many limitations. On the one hand, the commercial vehicle fuel tank capacity is huge, and the experiment is costly and time-consuming; on the other hand, the experiment can only select a limited number of installation points for testing, and it is difficult to ensure that the optimal installation position is found. Therefore, finding a fast, accurate and economical method for determining the installation position of the fuel jet pump is of great significance for optimizing the performance of the fuel system of dual-tank commercial vehicles.

[0025] In view of the above problems, this embodiment provides a method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, which determines the optimal installation position of the jet pump, meets a reasonable oil suction volume to fully utilize the capacity of the two fuel tanks, and at the same time, the engine oil pump outlet pressure does not exceed the limit value, thereby solving the application problem of the fuel jet pump in a high-pressure common rail engine dual-tank commercial vehicle, and is low-cost, safe and reliable.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 The figure is a flow chart of a method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle in a specific embodiment, the method comprising the following steps: S1. Obtaining a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; It should be noted that feasible installation positions refer to the positions where the fuel jet pump can operate itself without affecting the installation and operation of other components in terms of structure when arranged at these positions; S2. Converting the feasible installation position interval into installation position parameters, and constructing an engine oil return system simulation model for determining the installation position of the fuel jet pump based on the installation position parameters; Exemplarily, the engine oil return system simulation model is constructed by three-dimensional simulation software to simulate the process of the engine oil return system; S3. Simulate the engine oil return system simulation model, and determine the installation position of the fuel jet pump on the oil return pipe according to the simulation results; It should be noted that the feasible fuel jet pump installation range and the optimal installation position are obtained through simulation analysis, which can make a more comprehensive and convenient evaluation compared with the traditional test method.

[0028] In this example, the optimal installation position is determined by constructing a simulation model of the engine oil return system and simulating within a feasible installation position range and combining the simulation results, thereby avoiding the trial and error process in the traditional method and improving the accuracy and efficiency of the installation position.

[0029] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle is provided, such as Figure 2 As shown, the method comprises the following steps: S1. Obtaining a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; the specific steps of step S1 are as follows: S11. Determine the main tank float position and the auxiliary tank float position for a dual-tank commercial vehicle equipped with a high-pressure common rail engine; S12. The position between the main tank float and the auxiliary tank float on the fuel return line is used as the feasible installation position interval of the fuel jet pump; It should be noted that feasible installation positions refer to the positions where the fuel jet pump can operate itself without affecting the installation and operation of other components in terms of structure when arranged at these positions; S2. Convert the feasible installation position interval into installation position parameters, and construct an engine oil return system simulation model for determining the installation position of the fuel jet pump based on the installation position parameters; the specific steps of step S2 are as follows: S21. Constructing a simulation model of the engine oil return system for determining the installation position of the fuel jet pump; S22. A sub-model of components introduced into the engine oil return system simulation model; the components include an engine, an oil return pipe, a fuel jet pump, a main fuel tank, a main fuel tank float, a secondary fuel tank, a secondary fuel tank float, a main fuel tank pipe, and a secondary fuel tank pipe; S23. Establish the connection relationship between the sub-models of the components in the engine oil return system simulation model according to the actual situation, and configure the engine oil return system simulation model to run the engine fixed working condition and cycle road spectrum operation function, as well as the engine oil return system simulation model to calculate the oil pressure at each position and monitor the fuel flow and fuel tank liquid level height; like Figure 4The figure shows a schematic diagram of an actual engine oil return system, which includes a high-pressure common rail engine 1, a main oil tank 2 and an auxiliary oil tank 3; A main oil tank float 4 is provided in the main oil tank 2, and an auxiliary oil tank float 5 is provided in the auxiliary oil tank 3; A fuel injection pump 6 is provided between the main fuel tank 2 and the auxiliary fuel tank 3. The fuel injection pump 6 and the main fuel tank float 4, as well as the fuel injection pump 6 and the high-pressure common rail engine 1 are connected through an oil return pipe 7. The fuel injection pump and the auxiliary fuel tank float 5 are connected through an auxiliary fuel tank oil pipe, and the main fuel tank float 4 is connected to the high-pressure common rail engine 1 through an engine oil suction pipe 9.

[0030] according to Figure 4 The actual engine oil return system sets the connection relationship of each component in the engine oil return system simulation model to match the actual situation as much as possible; S24. Setting the installation position parameter interface of the engine oil return system simulation model, and importing the feasible installation position interval of the fuel jet pump through the installation position parameter interface; It should be noted that, since the position of the fuel jet pump is uncertain, the installation position parameter is set to characterize the position of the fuel jet pump. Specifically, the position of the fuel jet pump can be adjusted during the simulation process; S25. Set the output parameters of the engine oil return system simulation model; output parameters include the engine oil pump outlet oil pressure, the fuel jet pump oil suction from the auxiliary tank, the engine fuel consumption, the main tank liquid level height and the auxiliary tank liquid level height; It should be noted that the output parameters are the limiting factors for determining the installation position of the fuel jet pump. As long as the values ​​of these output parameters meet the requirements, the corresponding installation position is the required value; S3. Simulate the engine oil return system simulation model, and determine the installation position of the fuel jet pump on the oil return pipe according to the simulation results; The specific steps of step S3 are as follows: S31. Execute the simulation model of the engine oil return system, adjust the specific installation position within the feasible installation position range of the fuel jet pump, and use the output parameters corresponding to each installation position as the simulation result; It should be noted that the use of simulation process instead of test results greatly improves the efficiency and accuracy of determining the installation position of the fuel injection pump; S32. Determine the farthest installation position of the fuel injection pump on the oil pipe circuit according to the output parameters of the engine fuel consumption, the fuel injection pump from the auxiliary fuel tank and the engine oil pump outlet oil pressure; S33 obtains the pre-selected minimum engine fuel consumption ratio N%, combined with the engine fuel consumption, the fuel injection pump from the auxiliary tank to determine the fuel injection pump on the fuel line circuit the nearest installation position; S34. Select the actual installation position of the fuel injection pump on the fuel pipe loop between the farthest installation position and the closest installation position.

[0031] In an embodiment of the present invention, based on step S32, step S33 and step S34, a possible embodiment is given below to illustrate its specific implementation scheme in a non-limiting manner.

[0032] The specific steps of step S32 are as follows: S321. Determine the output parameters in the simulation process, in which the state M1 of the fuel injection pump sucking amount from the auxiliary fuel tank = 100% of the engine fuel consumption corresponds to the installation position Z1 of the fuel injection pump on the return pipe and the engine oil pump outlet oil pressure P1; S322. Determine whether the engine oil pump outlet oil pressure P1 corresponding to the state M1 is greater than the engine oil pump outlet pressure limit value Pmax; If yes, go to step S233; If not, it is determined that the installation position Z1 of the fuel jet pump on the oil return pipe is the farthest installation position of the fuel jet pump on the oil pipe loop, and the process goes to step S33; S323. Determine that the state M2 of the output parameter of the simulation process in which the outlet oil pressure of the engine oil pump is the outlet pressure limit value Pmax of the engine oil pump corresponds to the installation position Z2 of the fuel injection pump on the oil return pipe as the farthest installation position of the fuel injection pump on the oil pipe loop; It should be noted that for a typical vehicle operating condition, the engine oil return volume Q1 and the engine oil consumption flow Q0 are fixed values.

[0033] The fuel jet pump's oil suction volume Q2 from the auxiliary tank is affected not only by the engine's oil return volume Q1, but also by the pressure value p3 at the interface between the fuel jet pump and the main tank's oil return pipe. The smaller the pressure p3 at the interface between the fuel jet pump and the main tank's oil pipe, the greater the fuel jet pump's oil suction volume Q2 from the auxiliary tank. The calculation formula for the pressure value at the interface between the fuel jet pump and the main fuel tank oil pipe is:

[0034] Where p3 is the pressure value at the interface between the fuel jet pump and the main tank return pipe, k is the flow resistance coefficient of the return pipe per unit length, k' is the flow resistance coefficient of the fuel jet pump, L3 is the length of the return pipe between the fuel jet pump and the main tank, Q1 is the engine return oil flow, Q2 is the amount of oil sucked from the auxiliary tank by the fuel jet pump, Q3 is the fuel flow of the main tank return pipe, It can be seen from the above formula that adjusting the installation position of the fuel jet pump can change the size of p3 and thus change the amount of oil Q2 that the fuel jet pump absorbs from the auxiliary tank. Adjusting the installation position of the fuel jet pump to reduce the length value L3 will reduce the p3 value, resulting in an increase in the amount of oil Q2 that the fuel jet pump absorbs from the auxiliary tank. Although the increase in the amount of oil Q2 that the fuel jet pump absorbs from the auxiliary tank in turn leads to an increase in the p3 value, p3 is still reduced compared to before reducing the L3 value. Based on the same principle, adjusting the installation position of the fuel jet pump to increase the length value L 3， It will increase the p3 value, causing the fuel injection pump to suck less fuel from the auxiliary tank, Q2; Therefore, if the fuel injection pump sucks less fuel from the auxiliary tank than a certain amount of engine fuel consumption, there will still be residual fuel in the auxiliary tank when the engine sucks out the fuel in the main tank, and the fuel in the auxiliary tank cannot be fully utilized, which weakens the endurance advantage of the dual tanks. If the fuel injection pump sucks too much fuel from the auxiliary tank and exceeds the engine fuel consumption, the fuel in the main tank will increase, and there will be a risk of fuel overflow. Therefore, it is necessary to set both the farthest position and the closest position of the fuel injection pump. In addition, the high-pressure common rail engine oil pump requires that the oil pump outlet pressure value cannot exceed a limit value. This limit value is relatively small. If the fuel jet pump is installed in an unreasonable position, the oil pump outlet pressure generated by the jet pump when it is working will exceed this limit value, which will cause engine failure. The formula for the engine oil pump outlet oil pressure is:

[0035] Wherein, p1 is the oil pressure at the outlet of the engine oil pump, k is the flow resistance coefficient of the return oil pipe per unit length, k' is the flow resistance coefficient of the jet pump, k'' is the flow resistance coefficient of the oil float, L1 is the length of the return oil pipe connecting the outlet of the engine oil pump and the fuel injection pump, L3 is the length of the return oil pipe between the fuel injection pump and the main fuel tank, Q1 is the engine return oil flow rate, and Q2 is the amount of oil sucked from the auxiliary fuel tank by the fuel injection pump; It should be noted that when Q2 increases, p1 will increase. When Q2 increases to a certain extent, the p1 value may exceed the limit value of the oil pressure at the outlet of the engine oil pump, causing oil pump failure. Therefore, the installation position of the fuel injection pump needs to be limited according to the limit value of the outlet pressure of the engine oil pump. The specific steps of step S33 are as follows: S331. Determine the output parameters of the simulation process in which the fuel injection pump sucks fuel from the auxiliary tank = N% of the engine fuel consumption state M3 corresponds to the installation position Z3 of the fuel injection pump on the return pipe; in step S331, N% is 50%; S332. Determine the installation position Z3 of the fuel injection pump on the fuel return pipe as the nearest installation position of the fuel injection pump on the fuel pipe loop; If the fuel injection pump sucks less than N% of the engine fuel consumption from the auxiliary tank, there will still be residual fuel in the auxiliary tank when the engine sucks out the fuel in the main tank. The fuel in the auxiliary tank cannot be fully utilized, which weakens the endurance advantage of dual tanks. Therefore, it is necessary to set the fuel injection pump to the nearest installation position on the oil pipe loop; In step S34, a middle position between the farthest installation position and the closest installation position is selected as the best actual installation position of the fuel injection pump on the oil pipe loop; It should be noted that the fuel injection pump is installed in the middle position to prevent installation deviation and other reasons from causing the actual installation position to exceed the feasible installation area and affect the actual working performance of the jet pump.

[0036] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0037] like Figure 3 As shown, the following is an embodiment of the device for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle provided by the embodiment of the present disclosure. The device and the method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle of the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiment of the device for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle, reference can be made to the embodiment of the method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle.

[0038] The device includes: A feasible installation position acquisition unit, used to acquire a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; An engine oil return system simulation model building unit, used for converting a feasible installation position interval into an installation position parameter, and building an engine oil return system simulation model for determining the installation position of a fuel jet pump based on the installation position parameter; The fuel injection pump installation position determination unit is used to simulate the engine oil return system simulation model and determine the installation position of the fuel injection pump on the oil return pipe according to the simulation results.

[0039] The present embodiment provides a method for determining the setting position of the fuel jet pump on the oil return pipe according to the simulation results of the engine oil return system simulation model, so as to avoid engine failure caused by the outlet pressure of the high-pressure common rail engine oil pump exceeding the safety limit due to inappropriate installation position of the jet pump, or excessive oil suction from the auxiliary tank by the fuel jet pump causing oil overflow from the main tank, or insufficient oil suction from the auxiliary tank by the fuel jet pump causing the capacity of the auxiliary tank to be unable to be fully utilized, thereby improving vehicle performance and ensuring vehicle operation reliability. At the same time, by determining the installation position of the jet pump by simulation, the design cycle of the vehicle fuel supply system can be shortened and the design cost can be reduced.

[0040] The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle provided in the embodiment of the present application can be applied to electronic devices. Those skilled in the art will appreciate that the electronic device structure involved in the embodiment of the present invention does not constitute a limitation on the electronic device, and the electronic device may include more or fewer components than shown, or combine certain components, or arrange different components. In an embodiment of the present invention, the electronic device includes but is not limited to a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or required herein.

[0041] The electronic device may include a processor, an external memory interface, an internal memory, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, a wireless communication module, an audio module, a speaker, a microphone, a sensor module, buttons, a camera, a display, and a SIM card interface, etc.

[0042] It is to be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device. In other embodiments of the present application, the electronic device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0043] The processor may include one or more processing units, for example, the processor may include a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors.

[0044] The processor can be the nerve center and command center of the electronic device. The controller can generate an operation control signal according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

[0045] A memory may also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may store instructions or data that the processor has just used or is cyclically used. If the processor needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor, and thus improves system efficiency.

[0046] The above-mentioned electronic device realizes the method for determining the installation position of the fuel injection pump of the dual-tank commercial vehicle of the present application by obtaining the feasible installation position range of the fuel injection pump on the return pipe between the engine and the main fuel tank, converting the feasible installation position range into installation position parameters, and constructing an engine return oil system simulation model for determining the installation position of the fuel injection pump based on the installation position parameters, simulating the engine return oil system simulation model, and determining the installation position of the fuel injection pump on the return oil pipe according to the simulation results, so as to meet a reasonable oil suction volume to fully utilize the capacity of the two fuel tanks, and at the same time the engine oil pump outlet pressure does not exceed the limit value, thereby solving the application problem of the fuel injection pump in the high-pressure common rail engine dual-tank commercial vehicle, with low cost, safety and reliability.

[0047] The storage medium provided in the present application stores a program product that can implement a method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle.

[0048] A method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle includes: obtaining a feasible installation position range of the fuel injection pump on the oil return pipe between the engine and the main fuel tank; converting the feasible installation position range into installation position parameters, and constructing an engine oil return system simulation model for determining the installation position of the fuel injection pump based on the installation position parameters; simulating the engine oil return system simulation model, and determining the installation position of the fuel injection pump on the oil return pipe according to the simulation results.

[0049] In some possible embodiments, the method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle disclosed in the present invention can be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps described in the above "Exemplary Method" section of this specification according to various exemplary embodiments of the present disclosure.

[0050] The storage medium of the present disclosure can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, characterized in that: The steps include: S1. Obtaining a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; S2. Converting the feasible installation position interval into installation position parameters, and constructing an engine oil return system simulation model for determining the installation position of the fuel jet pump based on the installation position parameters; S3. Simulate the engine oil return system simulation model, and determine the installation position of the fuel jet pump on the oil return pipe according to the simulation results.

2. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 1, characterized in that: The specific steps of step S1 are as follows: S11. Determine the main tank float position and the auxiliary tank float position for a dual-tank commercial vehicle equipped with a high-pressure common rail engine; S12. The position between the main tank float and the auxiliary tank float on the fuel return line is used as the feasible installation position range of the fuel jet pump.

3. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 1, characterized in that: The specific steps of step S2 are as follows: S21. Constructing a simulation model of the engine oil return system for determining the installation position of the fuel jet pump; S22. Introducing a sub-model of a component in the engine oil return system simulation model; S23. Establish the connection relationship between the sub-models of the components in the engine oil return system simulation model according to the actual situation, and configure the engine oil return system simulation model to run the engine fixed working condition and cycle road spectrum operation function, as well as the engine oil return system simulation model to calculate the oil pressure at each position and monitor the fuel flow and fuel tank liquid level height; S24. Setting the installation position parameter interface of the engine oil return system simulation model, and importing the feasible installation position interval of the fuel jet pump through the installation position parameter interface; S25. Set the output parameters of the engine oil return system simulation model.

4. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 3, characterized in that: The components in step S22 include an engine, a fuel return pipe, a fuel jet pump, a main fuel tank, a main fuel tank float, an auxiliary fuel tank, an auxiliary fuel tank float, a main fuel tank pipe, and an auxiliary fuel tank pipe; The output parameters in step S25 include the outlet oil pressure of the engine oil pump, the amount of oil sucked from the auxiliary tank by the fuel jet pump, the engine fuel consumption, the main tank liquid level height and the auxiliary tank liquid level height.

5. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 4, characterized in that: The specific steps of step S3 are as follows: S31. Execute the simulation model of the engine oil return system, adjust the specific installation position within the feasible installation position range of the fuel jet pump, and use the output parameters corresponding to each installation position as the simulation result; S32. Determine the farthest installation position of the fuel injection pump on the oil pipe circuit according to the output parameters of the engine fuel consumption, the fuel injection pump from the auxiliary fuel tank and the engine oil pump outlet oil pressure; S33 obtains the pre-selected minimum engine fuel consumption ratio N%, combined with the engine fuel consumption, the fuel injection pump from the auxiliary tank to determine the fuel injection pump on the fuel line circuit the nearest installation position; S34. Select the actual installation position of the fuel injection pump on the fuel pipe loop between the farthest installation position and the closest installation position.

6. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 5, characterized in that: The specific steps of step S32 are as follows: S321. Determine the output parameters in the simulation process, in which the state M1 of the fuel injection pump sucking amount from the auxiliary fuel tank = 100% of the engine fuel consumption corresponds to the installation position Z1 of the fuel injection pump on the return pipe and the engine oil pump outlet oil pressure P1; S322. Determine whether the engine oil pump outlet oil pressure P1 corresponding to the state M1 is greater than the engine oil pump outlet pressure limit value Pmax; If yes, go to step S233; If not, it is determined that the installation position Z1 of the fuel jet pump on the oil return pipe is the farthest installation position of the fuel jet pump on the oil pipe loop, and the process goes to step S33; S323. Determine that the state M2 of the output parameter of the simulation process in which the outlet oil pressure of the engine oil pump is the outlet pressure limit value Pmax of the engine oil pump corresponds to the installation position Z2 of the fuel injection pump on the oil return pipe as the farthest installation position of the fuel injection pump on the oil pipe loop; The specific steps of step S33 are as follows: S331. Determine the output parameter in the simulation process that the fuel injection pump sucks oil from the auxiliary tank = N% of the engine fuel consumption state M3 corresponds to the installation position Z3 of the fuel injection pump on the return pipe; S332. Determine that the installation position Z3 of the fuel injection pump on the fuel return pipe is the nearest installation position of the fuel injection pump on the fuel pipe loop.

7. The method for determining the installation position of the fuel injection pump for a dual-tank commercial vehicle according to claim 6, characterized in that: In step S331, N% is 50%; In step S34, the middle position between the farthest installation position and the closest installation position is selected as the best actual installation position of the fuel injection pump on the fuel pipe loop.

8. A device for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle, characterized in that: include: A feasible installation position acquisition unit, used to acquire a feasible installation position interval of the fuel jet pump on the fuel return pipe between the engine and the main fuel tank; An engine oil return system simulation model building unit, used for converting a feasible installation position interval into an installation position parameter, and building an engine oil return system simulation model for determining the installation position of a fuel jet pump based on the installation position parameter; The fuel injection pump installation position determination unit is used to simulate the engine oil return system simulation model and determine the installation position of the fuel injection pump on the oil return pipe according to the simulation results.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method for determining the installation position of the fuel injection pump of a dual-tank commercial vehicle as described in any one of claims 1 to 7 are implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the installation position of a fuel injection pump for a dual-tank commercial vehicle as claimed in any one of claims 1 to 7 are implemented.

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