CN217652853U - Fuel supply system of multi-fuel-injection-pump diesel engine, diesel engine and vehicle - Google Patents
Fuel supply system of multi-fuel-injection-pump diesel engine, diesel engine and vehicle Download PDFInfo
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- CN217652853U CN217652853U CN202221198189.6U CN202221198189U CN217652853U CN 217652853 U CN217652853 U CN 217652853U CN 202221198189 U CN202221198189 U CN 202221198189U CN 217652853 U CN217652853 U CN 217652853U
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Abstract
The utility model belongs to the technical field of internal-combustion engine control, concretely relates to fuel feed system, diesel engine and vehicle of many injection pump diesel engines. The fuel supply system of the multi-fuel injection pump diesel engine comprises an oil tank, a fuel injection pump set and a fuel injector set. The oil injection pump set comprises at least two oil injection pumps which are connected in parallel at the output end of the oil tank. The oil injector group is arranged at the output end of the oil injection pump group. The fuel supply system of many injection pump diesel engine through setting up a plurality of injection pumps at the output of oil tank, can satisfy the maximum fuel feeding ability of engine demand, and the performance of full play engine also helps the demand of follow-up engine development. Simultaneously, a plurality of injection pumps are arranged in parallel, so that the fuel supply system of the diesel engine with the plurality of injection pumps has redundancy capability, and the problems of insufficient fuel supply and no redundancy capability in the fuel supply of the diesel engine in the prior art are solved.
Description
Technical Field
The utility model belongs to the technical field of internal-combustion engine control, concretely relates to fuel feed system of many injection pump diesel engines. Also relates to a diesel engine. It also relates to a vehicle.
Background
The fuel supply system of diesel engine is used to atomize clean diesel oil and spray it into combustion chamber regularly according to the requirement of working circulation of diesel engine. The fuel supply system of diesel engine is generally composed of fuel tank, coarse filter, fine filter, fuel delivery pump, fuel injection pump, fuel injector, low pressure fuel pipe and high pressure fuel pipe.
When fuel oil is supplied, diesel oil is mainly pumped out of an oil tank, then enters an oil injection pump after passing through a coarse filter and a fine filter, is pressurized in the oil injection pump and then is conveyed to an oil injector for injection, so that the diesel oil is atomized, and the diesel oil is combusted more fully.
Currently, fuel delivery systems employ a single or dual fuel pump to provide fuel to a high pressure common rail, which is then injected by an injector. The maximum oil supply capacity of the single oil injection pump can limit the maximum output power of the diesel engine, and one oil injection pump cannot meet the product development requirement when a high-power new engine product is developed. The double-injection oil pump solves the problem that the oil supply capacity of the single-injection oil pump is insufficient, but the double-injection oil pump does not have redundancy capacity, and once one of the oil injection pumps breaks down, the engine cannot normally run.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the fuel feeding that appears when diesel engine fuel is supplied with among the prior art is not enough and does not possess the redundancy ability at least. The purpose is realized by the following technical scheme:
the utility model discloses a first aspect provides a fuel feed system of many injection pump diesel engine, include:
an oil tank;
the oil injection pump group comprises at least two oil injection pumps and is arranged at the output end of the oil tank in parallel;
and the oil sprayer group is arranged at the output end of the oil sprayer pump group.
According to fuel feed system of many injection pump diesel engine, through setting up a plurality of injection pumps at the output of oil tank, can satisfy the biggest fuel feeding ability of engine demand, the performance of full play engine also helps the demand of follow-up engine development. Simultaneously, carry out the parallelly connected setting with a plurality of injection pumps, can make the fuel feed system of this many injection pumps diesel engine have the redundancy ability, can not appear because of an injection pump trouble, just lead to the condition emergence that the engine can't work, the problem that the fuel feeding that appears when having solved diesel engine fuel among the prior art is supplied with is not enough and does not possess the redundancy ability is solved.
Additionally, according to the utility model discloses a fuel feed system of many injection pump diesel engine still can have following additional technical characterstic:
in some embodiments of the present invention, the method further comprises:
the adjusting piece is arranged on any one of the fuel injection pumps and used for controlling the output fuel flow of the fuel injection pump;
the measuring part is arranged between the oil injection pump group and the oil injector group and is used for measuring the pressure value of the fuel oil output by the oil injection pump group;
and the information processing part is used for receiving and processing the information output by the measuring part and controlling the working state of the regulating piece.
In some embodiments of the present invention, the method further comprises:
the high-pressure distribution block is arranged between the oil injection pump group and the oil injection set, and the measuring part is arranged on the high-pressure distribution block.
In some embodiments of the present invention, the method further comprises:
the detection part is used for detecting the working state of the adjusting piece and transmitting the detection information to the information processing part;
and the warning part is used for receiving the information output by the information processing part and displaying the damage condition of the regulating piece.
In some embodiments of the present invention, the oil supply capacity of the at least two injection pumps is identical, partially identical or completely different.
In some embodiments of the present invention, the fuel injection pump group is configured as three fuel injection pumps.
In some embodiments of the present invention, the fuel injector group comprises a high pressure common rail for receiving the fuel output from the fuel injector group, and a plurality of fuel injectors connected in parallel to the high pressure common rail.
In some embodiments of the present invention, the method further comprises:
and the filtering assembly is arranged between the oil tank and the oil injection pump set.
The utility model discloses the second aspect provides a diesel engine, the diesel engine includes foretell many injection pump diesel engine's fuel feed system.
The utility model discloses embodiment's diesel engine with the utility model discloses embodiment's many injection pump diesel engine's fuel feed system has the same technological effect, no longer gives unnecessary details here.
A third aspect of the present invention provides a vehicle comprising the diesel engine described above.
The utility model discloses embodiment's vehicle with the utility model discloses embodiment diesel engine has the same technological effect, no longer gives unnecessary details here.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated with like reference numerals throughout the drawings. In the drawings:
fig. 1 is a schematic diagram of a fuel supply system of a multi-injection-pump diesel engine according to an embodiment of the present invention;
fig. 2 is another schematic diagram of a fuel supply system of a multi-fuel injection pump diesel engine according to an embodiment of the present invention;
fig. 3 is a logic diagram of a fuel supply system of a multi-injection-pump diesel engine according to an embodiment of the present invention.
In the drawings, the reference numerals denote the following:
1. an oil tank;
2. a filter assembly;
31. a first fuel injection pump; 32. a second fuel injection pump; 33. a third fuel injection pump;
41. a fuel injector; 42. a first high pressure common rail; 43. a second high pressure common rail; 44. a third high pressure common rail;
51. a first flow metering unit; 52. a second flow metering unit; 53. a third flow metering unit;
6. an information processing unit;
7. a high-pressure distribution block;
8. a measuring section.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both an up and down orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The utility model relates to a fuel feed system of many injection pump diesel engines, on the global design, this fuel feed system of many injection pump diesel engines includes oil tank, oil spout pump package and sprayer group. The oil injection pump set comprises at least two oil injection pumps which are arranged at the output end of the filtering component in parallel. The oil injector group is arranged at the output end of the oil injection pump group.
Many injection pump diesel engine's fuel feed system through with a plurality of injection pumps setting at the output of oil tank, can satisfy the maximum fuel feeding ability of engine demand, the performance of full play engine also helps the demand of follow-up engine development. Simultaneously, carry out the parallelly connected setting with a plurality of injection pumps, can make the fuel feed system of this many injection pumps diesel engine have the redundancy ability, can not appear because of an injection pump trouble, just lead to the condition emergence that the engine can't work, the problem that the fuel feeding that appears when having solved diesel engine fuel among the prior art is supplied with is not enough and does not possess the redundancy ability is solved.
Based on the above overall design concept, an exemplary configuration of the fuel supply system of the multi-fuel injection pump diesel engine according to the present embodiment is shown in fig. 1, and in this case, the diesel engine according to the present embodiment is a V-type diesel engine. Of course, besides this, the diesel engine in the present embodiment may also be an inline diesel engine, and the arrangement thereof in the fuel supply system may refer to the description in the present embodiment.
Specifically, in the present embodiment, the fuel supply system of the multi-fuel injection pump diesel engine further includes a filter assembly disposed between the fuel tank 1 and the fuel injection pump group. The fuel is required to exit the fuel tank 1 and then pass through the filter assembly 2 and enter the fuel injection pump assembly. Wherein, the filter component 2 adopts a filter for filtering harmful particles and moisture in the fuel. As a further possible embodiment, the filter assembly 2 may filter the fuel output from the fuel tank 1 by using a combination of a coarse filter and a fine filter.
Because the fuel injection pumps in the fuel injection pump group are arranged at the output end of the filter component 2 in a parallel connection mode, fuel can be shunted and enter each fuel injection pump after flowing out of the fuel tank 1. In the present embodiment, the fuel injection pump group is configured as three fuel injection pumps. Wherein, all be provided with the regulating part of following on every injection pump. For convenience of description, in the present embodiment, the three injection pumps are referred to as a first injection pump 31, a second injection pump 32, and a third injection pump 33, respectively.
It should be noted that the number of the fuel injection pump groups may be two or four or other numbers besides three fuel injection pumps, but when two fuel injection pumps are used, if the adjusting member of one of the fuel injection pumps is locked at the closed position, the fuel of the fuel injection pump returns to the fuel tank 1, and at this time, the situation that the maximum output power of the diesel engine cannot be met only by the other fuel injection pump occurs. And adopt four injection pumps, compare in adopting three injection pump, drop into great, consequently adopt three injection pump to be the best to the regulation and control effect of engine fuel feeding demand.
In some embodiments of the present invention, the oil supply capacity of at least two of the injection pumps is identical, partially identical or completely different. Specifically, in the present embodiment, the fuel injection pump group employs three fuel injection pumps, wherein the three fuel injection pumps may have the same model size, or two fuel injection pumps may have the same model size, or three fuel injection pumps may have different model sizes. For example, in the present embodiment, the first fuel injection pump 31, the second fuel injection pump 32, and the third fuel injection pump 33 are three identical fuel injection pumps, and the distribution ratio at this time is 1; if the first injection pump 31 is a small injection pump and the second injection pump 32 and the third injection pump 33 are two identical large injection pumps, they can be allocated according to the actual fuel supply capacity, for example, 0.8. So set up, help improving the complex flexibility between a plurality of injection pumps, ensure that arbitrary injection pump all can keep better operating condition, the condition of load operation can not appear. Meanwhile, the limitation on the performance of the fuel injection pump in subsequent maintenance is avoided. Of course, the same injection pump is used for all three injection pumps in the present embodiment.
The utility model discloses an among some embodiments, this fuel oil supply system of many injection pump diesel engine still includes regulating part, measuring part and information processing portion. Specifically, any one of the injection pumps is provided with an adjusting piece, and the adjusting piece is used for controlling the output fuel flow of the injection pump. The measuring part is arranged between the oil injection pump group and the oil injector group and used for measuring the pressure value of the fuel oil output by the oil injection pump group. The information processing part is used for receiving and processing the information output by the measuring part and controlling the working state of the regulating part. The matching form of the information processing part, the measuring part and the adjusting part is adopted, so that the redundancy capability of the fuel supply system is improved. When one fuel injection pump has oil supply fault, the information processing part can determine and control the work of the regulating part according to the measuring result of the measuring part, thereby ensuring that other fuel injection pumps can work effectively and normally, simultaneously ensuring the performance of the engine to the maximum extent and meeting the normal running of the vehicle.
In some embodiments of the present invention, the adjusting member is configured as an oil amount measuring unit. The fuel quantity metering unit is called MEUN valve, and can control the fuel inlet quantity and the fuel return quantity of the fuel injection pump, so that the fuel output quantity supplied to the fuel injector group is controlled. Adopt the oil mass metering unit as the regulating part of control injection pump, can communicate the cooperation with above-mentioned information processing portion 6, realize the accurate control to injection pump output oil mass. Simultaneously, the oil mass metering unit is current product, can directly purchase the installation of using, convenient and fast. Of course, other devices may be used for the control element, and the control element may control the fuel flow rate output by any of the injection pumps.
In some embodiments of the present invention, a high pressure distribution block 7 is further included, wherein the high pressure distribution block 7 is disposed between the oil injection pump set and the oil injection pump set, and the measuring portion 8 is disposed on the high pressure distribution block 7. The high-pressure distribution block 7 can be used to store high-pressure fuel and supply or distribute the fuel to the subsequent injector groups. The high-pressure distribution block 7 is arranged at the output end of the fuel injection pump group, so that the fuel injection pump group can be used as a buffer mechanism to relieve pressure impact before fuel distribution and avoid damage to the fuel injection pump group, and can also be used as an installation mechanism of the measuring part 8 to facilitate detection of the pressure of the fuel.
In some embodiments of the present invention, the measuring part 8 is configured as a rail pressure sensor. The rail pressure sensor is used as the measuring part 8, the actual pressure of the fuel in the high-pressure distribution block 7 can be detected, and the acquired pressure signal is converted into a usable output electric signal according to a certain rule, so that the control and regulation of fuel supply are carried out by matching with the signal processing part. The rail pressure sensor can be directly purchased and used as an existing product, is convenient to install and maintain, and has a relatively accurate detection result.
In some embodiments of the present invention, the information processing section 6 is configured as an electronic control unit. The electronic control unit is a core control element which receives signals from the sensors on one hand, completes the processing of the information on the other hand, and sends corresponding control instructions to control the correct action of the executive element so as to keep the running of the engine and the automobile in the optimal state. It is similar to common computer and consists of microcontroller, memory, input interface, output interface, A/D converter, shaping and driving IC. Therefore, the electronic control unit can fully receive the signal output by the rail pressure sensor, process the signal to further control the operation of the oil quantity metering unit, receive and process the signal output by the detection part and control the alarm part to enter the working state.
In some embodiments of the present invention, the fuel injector group includes a high pressure common rail for receiving the fuel output from the fuel injector group, and a plurality of fuel injectors 41 connected in parallel to the high pressure common rail. In the present embodiment, the diesel engine is a V-type diesel engine, so the injector group includes two high-pressure common rails, and a plurality of injectors 41. For convenience of description, the two high pressure common rails are referred to as a first high pressure common rail 42 and a second high pressure common rail 43. The high-pressure common rail can completely separate the injection process of the injector 41 from the oil pressure generation, so that the oil supply pressure is not affected by the engine speed.
Here, it should be noted that, when the diesel engine is a V-type engine, the diesel engine may be another type, such as an inline diesel engine. As shown in fig. 2, when the diesel engine is an inline diesel engine, the injector group is a high pressure common rail and a plurality of injectors 41, and for convenience of description, the high pressure common rail is referred to as a third high pressure common rail 44. In this case, other device arrangements of the fuel supply system of the multi-fuel injection pump diesel engine can be obtained by referring to the following description of the present embodiment.
In some embodiments of the present invention, the information processing section 6 is configured as an electronic control unit. The electronic control unit is a core control element which receives signals from the sensors on one hand, completes the processing of the information on the other hand, and sends corresponding control instructions to control the correct action of the executive element so as to keep the running of the engine and the automobile in the optimal state. It is composed of microcontroller, memory, input interface, output interface, A/D converter and large-scale integrated circuit for shaping and driving. Therefore, the electronic control unit can fully receive the signal output by the rail pressure sensor, process the signal to control the operation of the oil quantity metering unit, receive and process the signal output by the detection part and control the alarm part to enter the working state.
Furthermore, some embodiments of the present invention provide a fuel supply system for a multi-fuel injection pump diesel engine, further comprising a detection portion and an alarm portion. The detection part is used for detecting the working state of the adjusting piece and transmitting the detection information to the information processing part 6. The alarm part is used for receiving the information output by the information processing part 6 and displaying the damage condition of the regulating piece. The detection section and the alarm section are not shown in the figure. The arrangement of the detection part and the alarm part is beneficial to perfecting the fuel supply system of the diesel engine with multiple fuel injection pumps. When the condition that injection pump or oil mass metering unit damaged appears, can warn the damaged condition of navigating mate car fast, also can assist the maintainer to carry out the quick maintenance of vehicle. In the present embodiment, the detection unit may determine the degree of opening of the oil amount measuring unit by detecting the actual current of the flow measuring unit. The alarm part can also display the fault state of the oil quantity metering unit which is normally open or normally closed through the information output by the information processing part 6, such as a normally closed fault display red light, a normally open fault display green light, or directly display on a dial. Of course, in addition, the detection part and the alarm part may be arranged in other manners or structures to achieve the purpose of detection and alarm.
In use, fuel passes from the fuel tank 1, through the filter and into the first 31, second 32 and third 33 injection pumps and then into the high pressure distribution block 7. When the diesel engine is a V-type engine, as shown in fig. 1, fuel flows from the high-pressure distribution block 7 into the first high-pressure common rail 42 and the second high-pressure common rail 43, and is then injected by the injectors 41. When the diesel engine is a straight type engine, as shown in fig. 2, fuel flows directly from the high pressure distribution block 7 into the third high pressure common rail 44 and is then injected through the injectors 41.
Referring to fig. 3, the electronic control unit measures the pressure of the high-pressure fuel in the high-pressure distribution block 7 in real time through the rail pressure sensor, calculates the rail pressure deviation in real time according to the set rail pressure, calculates the total required fuel injection quantity through the PID controller of the rail pressure deviation, calculates the current set value of the fuel metering unit of each fuel injection pump through the distribution coefficient to control the duty ratio of the fuel metering unit, and finally controls the rail pressure deviation within a reasonable range. In the present embodiment, the rail pressure deviation should not be greater than 30dar and not less than-30 dar.
Since the same injection pump is used in the present embodiment, the required injection amount of the first injection pump 31, the required injection amount of the second injection pump 32, and the required injection amount of the third injection pump 33 are the same, and at this time, the set currents of the first flow meter metering unit 51, the second flow meter metering unit 52, and the third flow meter metering unit 53 are the same.
Specifically, when the oil supply balance of the oil injection pump needs to be adjusted, the electronic control unit receives an actual current signal of the flow metering unit, calculates a current deviation in real time according to a current set value, corrects the duty ratio calculation through the PID of the current deviation, calculates the duty ratio of each oil quantity metering unit according to the current set value and the PID correction of the current deviation, then controls the oil supply quantity of the oil injection pump through the duty ratio of the oil quantity metering unit, and finally realizes the oil supply balance and stability of each oil injection pump.
If the first metering element 51 of the first injection pump 31 is locked in the closed position, the fuel from the first injection pump 31 can flow back into the fuel tank 1, and the supply of the second injection pump 32 and the supply of the third injection pump 33 need to be readjusted. And according to the calculated current deviation of the second flow metering unit 52 and the set current of the second flow metering unit 52, the calculated current deviation of the third flow metering unit 53 and the set current of the third flow metering unit 53, calculating the duty ratio of the second flow metering unit 52 and the duty ratio of the third flow metering unit 53, and controlling and adjusting the oil supply amount of the second oil injection pump 32 and the third oil injection pump 33 to ensure the control stability of the rail pressure and realize the normal running of the automobile. In addition, the detection part detects the actual current of the first flow meter unit 51, determines that the first flow meter unit 51 is stuck at the closing position, and transmits information to the electronic control unit, and finally the electronic control unit controls the alarm part to work to inform a driver that the first flow meter unit 51 has a fault and needs to be overhauled.
The second aspect of the present invention also relates to a diesel engine including the fuel supply system of the above-mentioned multi-injection-pump diesel engine.
The diesel engine of the embodiment can meet the maximum oil supply capacity required by the engine, fully exert the performance of the engine, ensure the development requirement of the follow-up engine, and also has better redundancy capacity, so that the engine can be ensured to normally work even if a certain oil injection pump fails to supply, and the vehicle can be ensured to normally run to a maintenance place for maintenance.
A third aspect of the present invention also relates to a vehicle, which includes the diesel engine described above.
The vehicle of the present embodiment has the same technical effects as the diesel engine described above, and will not be described herein again.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A fuel supply system for a multiple injection pump diesel engine, comprising:
an oil tank;
the oil injection pump group comprises at least two oil injection pumps and is arranged at the output end of the oil tank in parallel;
and the oil sprayer group is arranged at the output end of the oil sprayer pump group.
2. The fuel supply system for a multi-fuel injection pump diesel engine according to claim 1, further comprising:
the adjusting piece is arranged on any one of the fuel injection pumps and used for controlling the output fuel flow of the fuel injection pump;
the measuring part is arranged between the oil injection pump group and the oil injector group and is used for measuring the pressure value of the fuel oil output by the oil injection pump group;
and the information processing part is used for receiving and processing the information output by the measuring part and controlling the working state of the regulating piece.
3. The fuel supply system for a multi-fuel injection pump diesel engine according to claim 2, further comprising:
the high-pressure distribution block is arranged between the oil injection pump group and the oil injection set, and the measuring part is arranged on the high-pressure distribution block.
4. The fuel supply system for a multi-injection pump diesel engine of claim 2, further comprising:
the detection part is used for detecting the working state of the adjusting piece and transmitting the detection information to the information processing part;
and the warning part is used for receiving the information output by the information processing part and displaying the damage condition of the regulating part.
5. The fuel supply system for a multi-injection pump diesel engine of claim 1, wherein the fuel supply capacities of said at least two injection pumps are identical, partially identical or completely different.
6. The fuel supply system for a multi-injection pump diesel engine of claim 1 wherein said injection pump group is configured as three said injection pumps.
7. The fuel supply system of a multi-fuel injection pump diesel engine of claim 1, wherein the fuel injector group includes a high pressure common rail for receiving the fuel output from the fuel injector pump group, and a plurality of fuel injectors connected in parallel to the high pressure common rail.
8. The fuel supply system for a multi-fuel injection pump diesel engine according to claim 1, further comprising:
and the filtering assembly is arranged between the oil tank and the oil injection pump set.
9. A diesel engine comprising the fuel supply system of the multi-pump diesel engine according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the diesel engine according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221198189.6U CN217652853U (en) | 2022-05-18 | 2022-05-18 | Fuel supply system of multi-fuel-injection-pump diesel engine, diesel engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221198189.6U CN217652853U (en) | 2022-05-18 | 2022-05-18 | Fuel supply system of multi-fuel-injection-pump diesel engine, diesel engine and vehicle |
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| CN217652853U true CN217652853U (en) | 2022-10-25 |
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| CN202221198189.6U Active CN217652853U (en) | 2022-05-18 | 2022-05-18 | Fuel supply system of multi-fuel-injection-pump diesel engine, diesel engine and vehicle |
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| Country | Link |
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| CN (1) | CN217652853U (en) |
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