Common rail self-checking system and vehicle

Abstract

The invention belongs to the technical field of engines, and discloses a common rail self-checking system and a vehicle. The system comprises an oil tank, a conveying component, a common rail pipe, at least two sets of oil sprayers and a butt joint pipe, the oil tank communicates with the conveying component through a first pipeline, the conveying component communicates with the common rail pipe through a second pipeline, the common rail pipe communicates with the oil sprayers through a third pipeline, and the oil sprayers communicate with the oil tank through a fourth pipeline. The third pipelines are in one-to-one correspondence with the oil sprayers, first sensors are installed on the third pipelines and can monitor oil pressure and temperature in the third pipelines, butt joint pipes are installed on inlets and outlets of the first sensors, the butt joint pipes are communicated with the third pipelines, and the butt joint pipes are made of transparent materials; the problems that in the prior art, the diesel condition in all high-pressure branches in a high-pressure common rail system cannot be observed, and the maintenance efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a common rail self-test system and a vehicle. Background Art

[0002] The engines of today's large vehicles usually use a high-pressure common rail system, which is achieved by installing multiple injectors on the common rail pipe, and connecting the fuel tank to the injector through the common rail pipe. However, during daily use, the pipes connecting the injector and the fuel tank often malfunction, and the fuel supply pipes between different parts may leak, causing the engine to be unable to use normally. At the same time, the fuel supply pipes are long and are bent in the narrow space inside the vehicle. If the fuel supply pipes are disassembled and repaired manually step by step, it will take a long time.

[0003] Under the current existing technology, a pressure gauge is installed on the common rail pipe to achieve the purpose of measuring the pressure of the high-pressure fuel supply pipeline. Although this method can detect high-pressure pressure, there is only one pressure gauge, which can only detect the pressure value in the common rail pipe. The pressure in the high-pressure branch between the common rail pipe and the injector cannot be measured, and it is also impossible to know whether the high-pressure branch is clean or whether there is air mixed inside. It still needs to be manually disassembled and checked one by one, and the pressure of each single high-pressure branch cannot be detected at the same time. At the same time, there may be air mixed inside the branch, resulting in the inability of the pressure gauge to measure accurately. Summary of the invention

[0004] The object of the present invention is to provide a common rail self-checking system and a vehicle, so as to solve the problem that the diesel conditions in each high-pressure branch of the high-pressure common rail system cannot be observed and the inspection efficiency is low in the prior art.

[0005] To achieve this object, the present invention adopts the following technical scheme: The present invention provides a common rail self-test system, comprising a fuel tank, a conveying component, a common rail pipe, an injector and a butt joint pipe, wherein the fuel tank is communicated with the conveying component through a first pipeline, the conveying component and the common rail pipe are communicated with each other through a second pipeline, the common rail pipe and the injector are communicated with each other through a third pipeline, the injector and the fuel tank are communicated with each other through a fourth pipeline, the injector comprises at least two groups, the third pipeline corresponds to the injector one by one, a first sensor is installed on the third pipeline, the first sensor can monitor the oil pressure and temperature in the third pipeline, the butt joint pipe is installed on the inlet and outlet of the first sensor, the butt joint pipe is communicated with the third pipeline, and the butt joint pipe is made of transparent material.

[0006] Preferably, an oil delivery pump and a high-pressure pump are installed in sequence in the conveying component, the oil delivery pump and the high-pressure pump are connected through a fifth pipeline, a first filter is installed on the fifth pipeline, a third sensor and a fourth sensor are installed on the fifth pipeline on both sides of the first filter, the docking tubes are installed on both sides of the third sensor, the docking tubes are installed on both sides of the fourth sensor, and the docking tubes are connected to the fifth pipeline.

[0007] Preferably, a second filter is installed between the oil pump and the oil tank, a fifth sensor and a sixth sensor are respectively installed on the first pipeline on both sides of the second filter, the docking tubes are respectively installed on both sides of the fifth sensor, the docking tubes are respectively installed on both sides of the sixth sensor, and the docking tubes are connected to the first pipeline.

[0008] Preferably, the mesh number of the first filter element is greater than the mesh number of the second filter element.

[0009] Preferably, the common rail pipe is connected to the fuel tank via a sixth pipeline, a seventh sensor is installed on the sixth pipeline, butt pipes are installed on both sides of the seventh sensor, and the butt pipes are connected to the sixth pipeline.

[0010] Preferably, an eighth sensor is installed on the second pipeline, and docking tubes are installed on both sides of the eighth sensor, and the docking tubes are connected with the second pipeline.

[0011] Preferably, a second sensor is installed on the fourth pipeline, and the butt joints are installed on both sides of the second sensor, and the butt joints are connected to the fourth pipeline.

[0012] Preferably, a docking joint is detachably mounted at the pipe opening of the docking pipe, and the docking joint can be connected to the third pipeline.

[0013] Preferably, the high-pressure pump is connected to the oil tank via a seventh pipeline, a ninth sensor is installed on the seventh pipeline, the docking tubes are installed on both sides of the ninth sensor, and the docking tubes are connected to the seventh pipeline.

[0014] A vehicle comprises the common rail self-test system described above, and also comprises a display screen, wherein the display screen is installed in a cab of the vehicle, the display screen is electrically connected to the first sensor, and the display screen can display parameters in the third pipeline that can be detected by the first sensor.

[0015] Beneficial effect: by installing the first sensor on each third pipeline, the temperature and pressure of the diesel in each third pipeline are detected in real time, and the data detected by the first sensor is transmitted to the display screen in the cab at the front end of the vehicle, so that the driver can monitor the pressure and temperature of the diesel in each third pipeline in real time, without the need to dismantle each third pipeline one by one, thereby improving the maintenance efficiency. At the same time, if an abnormality occurs in a single pipeline, the third pipeline with the problem can be directly confirmed through the display screen, and the cleanliness of the diesel in the third pipeline can be intuitively observed through the connecting pipe made of transparent material, and whether there is enough air mixed in the diesel can be directly observed with the naked eye, without the need to dismantle the third branch, thereby improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the circulation of the common rail self-checking system of the present invention;

[0017] Figure 2 It is the installation drawing of the butt-jointed pipe of the present invention.

[0018] In the figure: 1. first sensor; 2. second sensor; 3. third sensor; 4. fourth sensor; 5. fifth sensor; 6. sixth sensor; 7. seventh sensor; 8. eighth sensor; 9. docking joint; 10. fuel tank; 11. first pipeline; 12. second pipeline; 13. third pipeline; 14. fourth pipeline; 15. fifth pipeline; 16. sixth pipeline; 17. common rail pipe; 18. fuel injector; 19. docking pipe; 20. first filter element; 21. second filter element; 22. fuel pump; 23. high-pressure pump; 24. seventh pipeline; 25. ninth sensor. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0023] Under the existing technology, during the inspection and maintenance of the common rail system, only the pressure gauge can be used to confirm whether the pressure inside the common rail pipe is normal. If there is a leak in other parts of the common rail system, although the pressure gauge can display information of insufficient pressure, it is impossible to specifically confirm the specific location of the insufficient pressure. At this time, it is still necessary to dismantle the pipes inside the common rail system one by one for inspection, which will reduce the efficiency of the inspection. At the same time, the maintenance personnel cannot directly see whether the diesel inside is clean.

[0024] In order to solve the above problems, Figure 1 to Figure 2 As shown, the present invention provides a common rail self-test system, which includes a fuel tank 10, a conveying component, a common rail pipe 17, an injector 18 and a butt joint pipe 19, the fuel tank 10 is connected to the conveying component through a first pipeline 11, the conveying component and the common rail pipe 17 are connected through a second pipeline 12, the common rail pipe 17 and the injector 18 are connected through a third pipeline 13, the injector 18 is connected to the fuel tank 10 through a fourth pipeline 14, the injector 18 includes at least two groups, the third pipeline 13 corresponds to the injector 18 one by one, a first sensor 1 is installed on the third pipeline 13, the first sensor 1 can monitor the oil pressure and temperature in the third pipeline 13, and a butt joint pipe 19 is installed on the inlet and outlet of the first sensor 1, the butt joint pipe 19 is connected to the third pipeline 13, and the butt joint pipe 19 is made of transparent material.

[0025] In the above system, the diesel in the fuel tank 10 is converted into high-pressure diesel by the delivery component and delivered to the common rail pipe 17. The common rail pipe 17 is connected to the injectors 18 of different branches, so that the diesel in the injectors 18 is injected according to a certain injection sequence and finally flows back to the fuel tank 10.

[0026] By adding the first sensor 1 to the third pipeline 13, the first sensor 1 can monitor the temperature and pressure of the diesel in each third pipeline 13 during its flow. Since the first sensor 1 is electrically connected to a display screen in the cab of the vehicle, the temperature and pressure parameters of the third pipeline 13 detected by the first sensor 1 can be displayed on the display screen, so that the driver or maintenance personnel can directly obtain the temperature and pressure of the diesel in the third pipeline 13 through the display screen. When a problem occurs in a third pipeline 13, the problem with the diesel in the third pipeline 13 can be directly confirmed through the display screen, and the corresponding third pipeline 13 can be directly disassembled for maintenance or replacement, thereby shortening the maintenance time.

[0027] At the same time, both ends of the first sensor 1 of the present invention are also equipped with docking tubes 19, which are made of transparent material. Through the docking tubes 19 made of transparent material, maintenance personnel can directly observe whether the diesel inside is clean enough, and can also directly observe with the naked eye whether the diesel inside is mixed with air. If air is present, the third pipeline 13 can be directly disassembled for maintenance, which shortens the time for finding hidden dangers or leaks and improves maintenance efficiency.

[0028] An oil delivery pump 22 and a high-pressure pump 23 are sequentially installed in the delivery component, and the oil delivery pump 22 and the high-pressure pump 23 are connected through the fifth pipeline 15. The delivery pump can extract oil from the inside of the fuel tank 10, and then the high-pressure pump 23 can pressurize the low-pressure diesel into high-pressure diesel, so that the injector 18 can spray the high-pressure diesel. A first filter element 20 is installed on the fifth pipeline 15, and the first filter element 20 can filter the diesel. The third sensor 3 and the fourth sensor 4 are installed on both sides of the first filter element 20. Docking pipes 19 are respectively installed on both sides of the third sensor 3, and docking pipes 19 are respectively installed on both sides of the fourth sensor 4. The docking pipes 19 are connected to the fifth pipeline 15.

[0029] The third sensor 3 and the fourth sensor 4 can monitor the fifth pipeline 15 on both sides of the first filter 20, monitor the temperature and pressure of the internal diesel in real time, and monitor the fifth pipeline 15 where the first filter 20 is located. At the same time, the third sensor 3 and the fourth sensor 4 can be electrically connected to the display screen, and the diesel pressure and temperature information on both sides of the first filter 20 can be displayed on the display screen through the display screen, so that the personnel inside the vehicle can observe at any time, and can timely determine the location of the common rail self-test system, and can disassemble or repair the pipeline with problems. Similarly, the third sensor 3 and the fourth sensor 4 on the fifth pipeline 15 are connected to the fifth pipeline 15 through the butt joint 19, and the cleanliness of the diesel in the fifth pipeline 15 can be observed in time through the butt joint 19, and whether there are bubbles mixed in time can be confirmed in time.

[0030] A second filter 21 is installed between the oil delivery pump 22 and the oil tank 10. A fifth sensor 5 and a sixth sensor 6 are installed on the first pipeline 11 on both sides of the second filter 21. A butt joint 19 is installed on both sides of the fifth sensor 5. A butt joint 19 is installed on both sides of the sixth sensor 6. The butt joint 19 is connected to the first pipeline 11. The temperature and pressure of the diesel in the first pipeline 11 can be monitored by the fifth sensor 5 and the sixth sensor 6. The fifth sensor 5 and the sixth sensor 6 of the present invention are electrically connected to the display screen, and the temperature and pressure parameters of the diesel on both sides of the second filter 21 in the first pipeline 11 can be displayed on the display screen. At the same time, the fifth sensor 5 and the sixth sensor 6 of the present invention are both installed with a transparent butt joint 19. The use of the butt joint 19 allows maintenance personnel to intuitively see the working condition of the diesel in the first pipeline 11, whether the diesel in the first pipeline 11 is clean, and whether there are bubbles mixed in the diesel, so that the first pipeline 11 can be inspected and repaired in time.

[0031] The mesh number of the first filter element 20 is greater than that of the second filter element 21. The second filter element 21 can filter some large particles, while the first filter element 20 can filter small particles. Ultimately, the diesel entering the high-pressure pump 23 can be kept clean and avoid being mixed with other impurities. The first filter element 20 and the second filter element 21 can be replaced and their own mesh numbers can be adjusted according to actual needs.

[0032] The common rail pipe 17 of the present invention is also connected to the fuel tank 10 through the sixth pipe 16, and the seventh sensor 7 is installed on the sixth pipe 16. The butt pipes 19 are installed on both sides of the seventh sensor 7, and the butt pipes 19 are connected to the sixth pipe 16. The common rail pipe 17 is also provided with a sixth pipe 16 for oil return, so as to avoid excessive oil pressure in the common rail pipe 17 and maintain the pressure balance in the common rail pipe 17. By installing the seventh sensor 7, it is possible to monitor whether the reflux process is at normal reflux pressure and temperature, and at the same time, through the butt pipe 19 of the seventh sensor 7, it is possible to observe whether the diesel inside the butt pipe 19 is in a normal flow state. The seventh sensor 7 can also be electrically connected to a display screen, and the temperature and pressure value of the oil inside the sixth pipe 16 can be directly observed through the display screen, so that the inside of the sixth pipe 16 can be monitored in real time.

[0033] The eighth sensor 8 is installed on the second pipeline 12, and the butt pipes 19 are installed on both sides of the eighth sensor 8, and the butt pipes 19 are connected to the second pipeline 12. The eighth sensor 8 is installed between the common rail pipe 17 and the high-pressure pump 23. The oil pressure in the second pipeline 12 is relatively high, and it is necessary to replace the butt pipe 19 with a higher pressure on the second pipeline 12. The butt pipe 19 withstands the higher oil pressure in the second pipeline 12, and at the same time, the cleanliness of the diesel in the second pipeline 12 can be directly observed, and whether a large number of bubbles are mixed in the second pipeline 12. The eighth sensor 8 can be electrically connected to the display screen, and the diesel pressure and temperature values ​​inside the second pipeline 12 can be directly monitored through the eighth sensor 8, so that the detection personnel can perform real-time monitoring in the cab.

[0034] A second sensor 2 is installed on the fourth pipeline 14, and docking tubes 19 are installed on both sides of the second sensor 2. The docking tubes 19 are connected to the fourth pipeline 14. The second sensor 2 is installed on the fourth pipeline 14 to monitor the pressure and temperature of the diesel in the fourth pipeline 14. At the same time, the transparent docking tube 19 allows maintenance personnel to observe the oil state inside the fourth pipeline 14. At the same time, the second sensor 2 can be directly electrically connected to the display screen to display the diesel pressure and temperature parameters in the fourth pipeline 14 in real time on the display screen.

[0035] The high-pressure pump 23 of the present invention is connected to the fuel tank 10 through the seventh pipeline 24, and a ninth sensor 25 is installed on the seventh pipeline 24. The ninth sensor 25 is installed with docking tubes 19 on both sides. The docking tubes 19 are connected to the seventh pipeline 24. The ninth sensor 25 can display the diesel temperature and pressure in the seventh pipeline 24. The ninth sensor 25 is electrically connected to the display, and the pressure and temperature values ​​in the seventh pipeline 24 can be displayed on the display screen.

[0036] All parameters of the nine groups of sensors can be displayed on the display screen. When an abnormality occurs in the common rail self-test system, the location of the abnormality can be determined in time, thereby shortening the time for troubleshooting and improving maintenance efficiency. The nine groups of sensors of the present invention can all adopt the form of wireless transmission signals, and the display screen is integrated with a receiver, which can convert the model of the sensor's wireless transmission into a digital project on the display screen, reducing the wires required for the electrical connection of the sensor. Since the number of wires is reduced, the reliability can be improved and the difficulty of maintenance can be reduced. At the same time, the wireless sensor used in the present invention is a prior art and is not described here.

[0037] A docking joint 9 is detachably installed at the pipe mouth of the docking pipe 19, and the docking joint 9 can be connected to the third pipeline 13. The docking joint 9 is installed at the pipe mouth of the docking pipe 19 of the present invention. The docking joint 9 of the present invention has different specifications. When the docking pipe 19 needs to be connected to pipelines of different diameters, the docking joint 9 of the corresponding size can be replaced, so that the docking joint 9 can be connected to any pipeline from the first pipeline 11 to the seventh pipeline 24, so that the docking pipe 19 can be connected to all pipelines of the common rail self-inspection system.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A common rail self-test system, characterized in that: The invention comprises a fuel tank (10), a delivery component, a common rail pipe (17), a fuel injector (18) and a butt pipe (19), wherein the fuel tank (10) is connected to the delivery component via a first pipe (11), the delivery component and the common rail pipe (17) are connected via a second pipe (12), the common rail pipe (17) and the fuel injector (18) are connected via a third pipe (13), the fuel injector (18) is connected to the fuel tank (10) via a fourth pipe (14), and the fuel injector (18) is connected to the fuel tank (10) via a fourth pipe (15). The fuel injector (18) comprises at least two groups, the third pipeline (13) corresponds to the fuel injector (18) one by one, the third pipeline (13) is provided with a first sensor (1), the first sensor (1) can monitor the oil pressure and temperature in the third pipeline (13), the inlet and outlet of the first sensor (1) are provided with a butt joint (19), the butt joint (19) is connected with the third pipeline (13), and the butt joint (19) is made of a transparent material.

2. The common rail self-test system according to claim 1, characterized in that: An oil delivery pump (22) and a high-pressure pump (23) are sequentially installed in the delivery component; the oil delivery pump (22) and the high-pressure pump (23) are connected via a fifth pipeline (15); a first filter element (20) is installed on the fifth pipeline (15); a third sensor (3) and a fourth sensor (4) are installed on the fifth pipeline (15) on both sides of the first filter element (20); the butt joint pipes (19) are respectively installed on both sides of the third sensor (3); the butt joint pipes (19) are respectively installed on both sides of the fourth sensor (4); and the butt joint pipes (19) are connected to the fifth pipeline (15).

3. The common rail self-test system according to claim 2, characterized in that: A second filter (21) is installed between the oil delivery pump (22) and the oil tank (10); a fifth sensor (5) and a sixth sensor (6) are installed on the first pipeline (11) on both sides of the second filter (21); the butt joint pipes (19) are installed on both sides of the fifth sensor (5); the butt joint pipes (19) are installed on both sides of the sixth sensor (6); and the butt joint pipes (19) are connected to the first pipeline (11).

4. The common rail self-test system according to claim 3, characterized in that: The mesh number of the first filter element (20) is greater than the mesh number of the second filter element (21).

5. The common rail self-test system according to claim 1, characterized in that: The common rail pipe (17) is connected to the oil tank (10) through a sixth pipe (16); a seventh sensor (7) is installed on the sixth pipe (16); butt pipes (19) are installed on both sides of the seventh sensor (7); the butt pipes (19) are connected to the sixth pipe (16).

6. The common rail self-test system according to claim 1, characterized in that: An eighth sensor (8) is installed on the second pipeline (12), and butt-joint pipes (19) are installed on both sides of the eighth sensor (8), and the butt-joint pipes (19) are in communication with the second pipeline (12).

7. The common rail self-test system according to claim 1, characterized in that: The fourth pipeline (14) is provided with a second sensor (2), and the butt joint pipes (19) are provided on both sides of the second sensor (2), and the butt joint pipes (19) are connected to the fourth pipeline (14).

8. The common rail self-test system according to claim 1, characterized in that: A docking joint (9) is detachably mounted at the pipe opening of the docking pipe (19), and the docking joint (9) can be connected to the third pipeline (13).

9. The common rail self-test system according to claim 2, characterized in that: The high-pressure pump (23) is connected to the oil tank (10) via a seventh pipeline (24); a ninth sensor (25) is installed on the seventh pipeline (24); the butt joint pipes (19) are installed on both sides of the ninth sensor (25); and the butt joint pipes (19) are connected to the seventh pipeline (24).

10. A vehicle, characterized in that: The common rail self-test system comprises the common rail self-test system according to any one of claims 1 to 9, and further comprises a display screen, wherein the display screen is installed in a cab of a vehicle, the display screen is electrically connected to the first sensor (1), and the display screen can display parameters in the third pipeline (13) that can be detected by the first sensor (1).

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