A mining heavy truck engine fault diagnosis device and diagnosis method

Abstract

The present invention discloses a mining heavy truck engine fault diagnosis device and a diagnosis method, and relates to the field of mining truck maintenance. A mining heavy truck engine fault diagnosis device, comprising a placement box, the opening end of the placement box is rotatably connected to a box cover through a hinge, the box cover is fixedly connected to a handle, and also comprises: a storage box, which can be raised and lowered inside the placement box; a fault diagnosis instrument and the diagnostic instrument accessories used in conjunction with it are placed in the storage box; a fixing rod, which is symmetrically fixedly connected to both sides of the lower end of the box cover, and a limited position opening is provided on the fixing rod; the present invention can fix the fault diagnosis instrument and the diagnostic instrument accessories used in conjunction with it, to prevent the fault diagnosis instrument and the diagnostic instrument accessories used in conjunction with it from shaking during mobile transportation, causing damage to them and affecting their use, and at the same time, it can stably fix the box cover on the placement box to avoid the risk of the box cover being opened.

Description

Technical Field

[0001] The invention belongs to the technical field of mining truck maintenance, and in particular relates to a mining heavy truck engine fault diagnosis device and a diagnosis method. Background Art

[0002] In mining production, mining heavy trucks play an indispensable role. In order to respond to the slogan of energy conservation and environmental protection, and with the continuous advancement of battery technology and the increasing requirements for environmental protection, more and more mines have begun to adopt electric mining heavy trucks. Many mining equipment manufacturers have also increased their investment in the research and development and production of electric mining heavy trucks.

[0003] In the operation and maintenance of mining heavy trucks, accurate and timely diagnosis of electric engine faults is crucial. Previous fault diagnosis equipment usually only placed the fault diagnosis instrument and its accessories directly in a simple box, lacking effective fixing measures. During transportation, due to the vibration and bumps caused by the vehicle's driving, the fault diagnosis instrument and accessories placed in the box will shake violently. This unrestrained shaking may cause the internal components of the precision fault diagnosis instrument to shift and loosen, and even damage its electronic components and line connections, seriously affecting its performance and service life, which may lead to misjudgment and inaccurate data collection in the subsequent engine fault diagnosis. It is impossible to provide maintenance personnel with a reliable diagnostic basis, which greatly increases the difficulty and time cost of engine fault troubleshooting and repair.

[0004] At the same time, the connection between the traditional equipment box cover and the box body is also relatively simple. During the mobile transportation process, the box cover is easily opened accidentally due to vibration, which will not only expose the internal diagnostic instruments and accessories to the outside, facing the risk of falling, collision damage, and contamination by external dust, water vapor, etc., but once the box cover is opened, it may also interfere with the transportation process and even cause safety hazards to surrounding personnel and equipment. In view of this, the present invention is specially proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a mining heavy truck engine fault diagnosis device and a diagnosis method that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a mining heavy truck engine fault diagnosis equipment, including a placement box, the open end of the placement box is rotatably connected to a box cover by a hinge, and the box cover is fixedly connected to a handle, and also includes: a storage box, which can be raised and lowered inside the placement box; a fault diagnosis instrument and the accessories of the diagnosis instrument used in conjunction with it are placed in the storage box; a fixing rod, which is symmetrically fixedly connected to the two sides of the lower end of the box cover, and a limiting opening is provided on the fixing rod; a limiting plug rod used in conjunction with the limiting opening on the fixing rod, which can be movably set on the inner wall of the placement box near the fixing rod.

[0007] Furthermore, it also includes a third sleeve and a second spring. The third sleeve is fixedly connected in the placement box at a position close to the fixed rod. The second spring is fixedly connected in the third sleeve. The limiting rod is slidably connected in the third sleeve and fixedly connected to the second spring. One end of the limiting rod close to the second spring is fixedly connected with a connecting rope, and the end of the connecting rope away from the limiting rod extends outwardly through the third sleeve.

[0008] Furthermore, a second sleeve is symmetrically fixedly connected to the placement box below the storage box, a first spring is fixedly connected to the second sleeve, a support rod is fixedly connected to the bottom of the storage box near the second sleeve, the support rod is slidably connected in the second sleeve and fixedly connected to the first spring, the connecting rope extends into the second sleeve at one end away from the limiting plug rod and is fixedly connected to the bottom of the support rod, the elastic force of the first spring is greater than the elastic force of the second spring, and a pressing component for pressing down the storage box is installed at the lower end of the box cover.

[0009] Furthermore, the pressure assembly includes a first sleeve, a screw rod, a rotating column and a rotating block. The first sleeve is symmetrically rotatably connected to both sides of the lower end of the box cover. The screw rod is threadedly connected in the first sleeve. A pressure plate is fixedly connected between the lower ends of the two screw rods. The rotating column is rotatably connected to a position on the box cover between the two first sleeves. The rotating block is fixedly connected to one end of the rotating column extending upward from the box cover. The rotating column and the two first sleeves are connected via a transmission part.

[0010] Furthermore, the transmission part includes a first sprocket, a second sprocket and a chain, the first sprocket is fixedly connected to the lower end of the rotating column, the second sprocket is fixedly connected to the first sleeve, and the first sprocket and the two second sprockets are connected by a chain.

[0011] In order to facilitate the guiding of the connecting rope and prevent friction between the connecting rope and the second sleeve and the third sleeve, further, a first receiving wheel is installed on the side of the second sleeve away from the support rod and the side of the third sleeve away from the limiting plug rod, and the connecting rope is wrapped around the two first receiving wheels.

[0012] In order to further improve the service life of the connecting rope, further, second receiving wheels are symmetrically installed on both sides of the lower end of the storage box, and the connecting rope is wound around the second receiving wheels.

[0013] In order to facilitate the separate storage of the fault diagnosis instrument and the accessories of the diagnostic instrument used in conjunction with it and avoid collision between the fault diagnosis instrument and the accessories of the diagnostic instrument used in conjunction with it, a foam containing mold is further installed in the storage box, and a containing groove used in conjunction with the fault diagnosis instrument and the accessories of the diagnostic instrument used in conjunction with it is provided in the foam containing mold.

[0014] In order to prevent the lower pressure plate from crushing the fault diagnosis instrument and its accessories, a rubber cushion is fixedly connected to the lower end surface of the lower pressure plate by adhesive.

[0015] A diagnostic method for engine fault diagnosis of a mining heavy truck mainly comprises the following steps:

[0016] S1: When a mining heavy truck engine fails and needs to be diagnosed, the maintenance personnel first take the storage box to the engine;

[0017] S2: Then the rotating block can be rotated to release the downward pressure of the pressing assembly on the storage box. At this time, the support rod will overcome the elastic force of the second spring through the connecting rope to pull the limit rod into the third sleeve. When the limit rod is completely separated from the limit opening on the fixed rod, the maintenance personnel can open the box cover through the handle, take out the fault diagnosis instrument and the matching diagnostic instrument accessories stored in the storage box, and prepare to diagnose the engine fault;

[0018] S3: Use the fault diagnosis instrument and corresponding diagnostic instrument accessories taken out, and connect them to the diagnostic interface of the mining heavy truck engine according to the operating instructions of the fault diagnosis instrument, ensuring that the connection is firm and stable without looseness;

[0019] S4: Turn on the fault diagnosis instrument and select the diagnostic program and parameter settings that match the engine model of the mining heavy truck according to the prompt information on its display screen to ensure the accuracy and effectiveness of the diagnosis;

[0020] S5: Start the engine and put it in a suitable operating state so that the fault diagnosis instrument can collect various data during the operation of the engine, including but not limited to temperature, pressure, sensor signals, etc.;

[0021] S6: The maintenance personnel make a preliminary judgment and analysis of the possible faults of the engine based on the real-time data and fault codes displayed by the fault diagnosis instrument, combined with their own professional knowledge and experience, to determine the approximate scope and type of the fault, such as circuit fault, mechanical component fault, etc.

[0022] S7: Based on the initially determined fault range, further use diagnostic instrument accessories, such as professional test probes, sensor simulators, etc., to conduct in-depth inspection and testing of relevant engine components and systems to obtain more detailed and accurate fault information to accurately locate the fault point, such as determining whether a certain line is short-circuited or open-circuited;

[0023] S8: After completing the engine fault diagnosis, put the fault diagnosis instrument and the used diagnostic instrument accessories back into the storage box, ensure that they are placed neatly and firmly to avoid damage during subsequent operations, and re-lock the box cover.

[0024] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention realizes all-round fixation of the fault diagnosis instrument and its accessories through the storage box and the spring support structure underneath it, the limiting plug rod between the box cover and the placement box cooperating with the fixing structure of the fixing rod, and the downward pressing and stabilizing effect of the downward pressing component on the storage box, thereby effectively avoiding the shaking of the placement box during the moving and transportation of the placement box, reducing the possibility of failure due to shaking, and ensuring the normal operation of the equipment during subsequent use.

[0025] By using the cooperation of the limiting plug rod and the fixing rod, the box cover can be tightly fixed on the storage box when it is closed, which greatly reduces the risk of accidental opening of the box cover during mobile transportation, improves the stability of the entire equipment during storage and transportation, and ensures the safety of the equipment and its internal accessories.

[0026] The design of the pressing component allows for operations such as turning the rotating block when the box lid needs to be opened, and through a series of transmissions, the limiting rod can be disengaged from the limiting mouth of the fixed rod and the storage box can be pressed down. The operation is relatively simple and convenient, which not only achieves a good fixing function, but also takes into account the need for easy opening operation during use.

[0027] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the attached picture:

[0029] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0030] Figure 2 It is a schematic diagram of a top view of a part of the structure of the present invention;

[0031] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of part A;

[0032] Figure 4 For the present invention Figure 1 The structural diagram of part B;

[0033] Figure 5 It is a structural schematic diagram of the rotating block in the present invention;

[0034] Figure 6 It is a schematic diagram of the structure between the rotating column, the first sleeve and the transmission part of the present invention.

[0035] In the figure: 1. placement box; 2. box cover; 4. storage box; 5. second sleeve; 6. support rod; 7. second receiving wheel; 8. connecting rope; 9. first sleeve; 10. screw rod; 11. lower pressure plate; 12. rotating column; 13. third sleeve; 14. limit rod; 15. rotating block; 16. foam containing mold; 1601. fault diagnosis instrument; 1602. diagnostic instrument accessories; 17. fixing rod; 18. first sprocket; 19. second sprocket; 20. chain; 21. first spring; 22. first receiving wheel; 23. second spring; 201. handle. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] Embodiment 1:

[0038] Reference Figure 1-Figure 6 A mining heavy truck engine fault diagnosis device comprises a placement box 1, the opening end of the placement box 1 is rotatably connected to a box cover 2 via a hinge, the box cover 2 is fixedly connected to a handle 201, and further comprises: a storage box 4, which can be lifted and lowered inside the placement box 1; a fault diagnosis instrument 1601 and a matching diagnosis instrument accessory 1602, both of which are placed in the storage box 4; a fixing rod 17, which is symmetrically fixedly connected to both sides of the lower end of the box cover 2, and a limiting opening is provided on the fixing rod 17; a limiting plug rod 14 used in conjunction with the limiting opening on the fixing rod 17, which can be movably arranged on the inner wall of the placement box 1 near the fixing rod 17.

[0039] It also includes a third sleeve 13 and a second spring 23. The third sleeve 13 is fixedly connected in the placement box 1 at a position close to the fixed rod 17. The second spring 23 is fixedly connected in the third sleeve 13. The limiting rod 14 is slidably connected in the third sleeve 13 and fixedly connected to the second spring 23. One end of the limiting rod 14 close to the second spring 23 is fixedly connected with a connecting rope 8, and the end of the connecting rope 8 away from the limiting rod 14 extends outward through the third sleeve 13.

[0040] A second sleeve 5 is symmetrically fixedly connected to the placement box 1 below the storage box 4, and a first spring 21 is fixedly connected to the second sleeve 5. A support rod 6 is fixedly connected to the bottom of the storage box 4 near the second sleeve 5. The support rod 6 is slidably connected to the second sleeve 5 and fixedly connected to the first spring 21. The end of the connecting rope 8 away from the limiting plug 14 extends into the second sleeve 5 and is fixedly connected to the bottom of the support rod 6. The elastic force of the first spring 21 is greater than the elastic force of the second spring 23. A pressing component for pressing down the storage box 4 is installed at the lower end of the box cover 2.

[0041] The pressing assembly includes a first sleeve 9, a screw rod 10, a rotating column 12 and a rotating block 15. The first sleeve 9 is symmetrically rotatably connected to both sides of the lower end of the box cover 2. The screw rod 10 is threadedly connected in the first sleeve 9. A pressing plate 11 is fixedly connected between the lower ends of the two screw rods 10. The rotating column 12 is rotatably connected to the box cover 2 at a position between the two first sleeves 9. The rotating block 15 is fixedly connected to one end of the rotating column 12 extending upward from the box cover 2. The rotating column 12 is connected to the two first sleeves 9 through a transmission part.

[0042] The transmission part includes a first sprocket 18 , a second sprocket 19 and a chain 20 . The first sprocket 18 is fixedly connected to the lower end of the rotating column 12 , the second sprocket 19 is fixedly connected to the first sleeve 9 , and the first sprocket 18 and the two second sprockets 19 are connected by the chain 20 .

[0043] When a mining heavy truck engine fails and needs to use the fault diagnosis instrument 1601 and the matching diagnostic instrument accessories 1602 to diagnose the engine fault, the maintenance personnel can take the placement box 1 to the side of the engine through the handle 201, and then rotate the rotating block 15. The rotating block 15 will drive the first sprocket 18 to rotate through the rotating column 12, and the first sprocket 18 will drive the first sleeve 9 to rotate through the chain 20 and the second sprocket 19. The first sleeve 9 will drive the screw rod 10 to move up through the thread with the cooperation of the lower pressure plate 11, and then the lower pressure plate 11 will move up. At this time, the pressure on the first spring 21 will gradually decrease, and the first spring 21 will support The rod 6 gradually lifts the storage box 4 upward. Since the elastic force of the first spring 21 is greater than the elastic force of the second spring 23, the support rod 6 will overcome the elastic force of the second spring 23 through the connecting rope 8 and pull the limiting rod 14 into the third sleeve 13 during the upward movement of the support rod 6. When the screw rod 10 is completely moved upward into the first sleeve 9, the limiting rod 14 will be completely disengaged from the limiting opening on the fixing rod 17. At this time, the limit on the box cover 2 can be released, and then the maintenance personnel can open the box cover 2 through the handle 201, and then the fault diagnosis instrument 1601 and the diagnostic instrument accessories 1602 stored in the storage box 4 can be taken out to diagnose the engine fault.

[0044] When the engine fault diagnosis is completed, the fault diagnosis instrument 1601 and the diagnostic instrument accessories 1602 used in conjunction with it can be put back into the storage box 4, and then the box cover 2 can be closed again. When the lower pressure plate 11 contacts the storage box 4, the storage box 4 will overcome the elastic force of the first spring 21 and move downward under the downward pressure of the lower pressure plate 11. At this time, the restriction of the support rod 6 on the second spring 23 will gradually disappear. At this time, the second spring 23 will drive the limit rod 14 to move to the outside of the third sleeve 13 under the action of its own elastic force. When the box cover 2 is completely closed, the rotating block 15 is rotated in the opposite direction, and then the screw rod 10 will move down again. When the storage box 4 is completely moved down to the lowermost end, the limit rod 14 will be inserted into the limit opening on the fixing rod 17, so that the box cover 2 can be locked again, and the fault diagnosis instrument 1601 and the diagnostic instrument accessories 1602 used in conjunction with it can be safely stored in the placement box 1.

[0045] Embodiment 2:

[0046] Reference Figure 1-Figure 6, a mining heavy truck engine fault diagnosis equipment, is basically the same as Example 1, and further, the side of the second sleeve 5 away from the support rod 6 and the side of the third sleeve 13 away from the limiting plug rod 14 are both installed with a first receiving wheel 22, and the connecting rope 8 is wrapped around the two first receiving wheels 22. Through the setting of the first receiving wheel 22, the connecting rope 8 can be guided to prevent friction between the connecting rope 8 and the second sleeve 5 and the third sleeve 13, thereby effectively improving the service life of the connecting rope 8.

[0047] Second receiving wheels 7 are symmetrically installed on both sides of the lower end of the placement box 1, and the connecting rope 8 is wrapped around the second receiving wheels 7. Through the setting of the second receiving wheels 7, the part of the connecting rope 8 that is not in the second sleeve 5 and the third sleeve 13 can be guided, and through the mutual cooperation with the first receiving wheel 22, the service life of the connecting rope 8 can be further improved.

[0048] Embodiment 3:

[0049] Reference Figure 1-Figure 6 , a mining heavy truck engine fault diagnosis device, which is basically the same as Example 2, and further, a foam containing mold 16 is installed in the storage box 4, and a containing groove used in conjunction with a fault diagnosis instrument 1601 and a matching diagnostic instrument accessory 1602 is opened in the foam containing mold 16. When the fault diagnosis instrument 1601 and the matching diagnostic instrument accessory 1602 are stored, not only can the fault diagnosis instrument 1601 and the matching diagnostic instrument accessory 1602 be more comprehensively protected, but the fault diagnosis instrument 1601 and the matching diagnostic instrument accessory 1602 can also be stored separately to avoid collision between the fault diagnosis instrument 1601 and the matching diagnostic instrument accessory 1602.

[0050] A rubber pad is fixedly connected to the lower end surface of the lower pressure plate 11 by adhesive. The rubber pad can prevent the lower pressure plate from crushing the fault diagnosis instrument 1601 and the diagnostic instrument accessory 1602 used in conjunction with it, thereby further improving the protection effect of the fault diagnosis instrument 1601 and the diagnostic instrument accessory 1602 used in conjunction with it.

[0051] The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention.

Claims

1. A mining heavy truck engine fault diagnosis device, characterized in that: The invention comprises a storage box (1), wherein the opening end of the storage box (1) is rotatably connected to a box cover (2) via a hinge, and a handle (201) is fixedly connected to the box cover (2), and further comprises: A storage box (4) which can be lifted and lowered and arranged inside the placement box (1); The fault diagnosis instrument (1601) and the diagnostic instrument accessories (1602) used in conjunction therewith are both placed in the storage box (4); A fixing rod (17) is symmetrically fixedly connected to two sides of the lower end of the box cover (2), and a limiting opening is provided on the fixing rod (17); A limiting plug rod (14) used in conjunction with the limiting opening on the fixing rod (17) can be movably arranged at a position on the inner wall of the placement box (1) close to the fixing rod (17).

2. A mining heavy truck engine fault diagnosis device according to claim 1, characterized in that: It also includes a third sleeve (13) and a second spring (23), wherein the third sleeve (13) is fixedly connected in the placement box (1) at a position close to the fixed rod (17), the second spring (23) is fixedly connected in the third sleeve (13), the limiting rod (14) is slidably connected in the third sleeve (13) and is fixedly connected to the second spring (23), and one end of the limiting rod (14) close to the second spring (23) is fixedly connected to a connecting rope (8), and the end of the connecting rope (8) away from the limiting rod (14) extends outward through the third sleeve (13).

3. A mining heavy truck engine fault diagnosis device according to claim 2, characterized in that: A second sleeve (5) is symmetrically fixedly connected to the storage box (4) below the storage box (4) in the placement box (1), and a first spring (21) is fixedly connected to the second sleeve (5). A support rod (6) is fixedly connected to the bottom of the storage box (4) near the second sleeve (5). The support rod (6) is slidably connected to the second sleeve (5) and is fixedly connected to the first spring (21). One end of the connecting rope (8) away from the limiting plug rod (14) extends into the second sleeve (5) and is fixedly connected to the bottom of the support rod (6). The elastic force of the first spring (21) is greater than the elastic force of the second spring (23). A pressing component for pressing down the storage box (4) is installed at the lower end of the box cover (2).

4. A mining heavy truck engine fault diagnosis device according to claim 3, characterized in that: The pressing assembly comprises a first sleeve (9), a screw rod (10), a rotating column (12) and a rotating block (15); the first sleeve (9) is symmetrically rotatably connected to the two sides of the lower end of the box cover (2); the screw rod (10) is threadedly connected in the first sleeve (9); a pressing plate (11) is fixedly connected between the lower ends of the two screw rods (10); the rotating column (12) is rotatably connected to the box cover (2) at a position between the two first sleeves (9); the rotating block (15) is fixedly connected to one end of the rotating column (12) extending upward from the box cover (2); the rotating column (12) and the two first sleeves (9) are connected via a transmission part.

5. The engine fault diagnosis equipment for mining heavy trucks according to claim 4 is characterized in that: The transmission part comprises a first sprocket (18), a second sprocket (19) and a chain (20); the first sprocket (18) is fixedly connected to the lower end of the rotating column (12); the second sprocket (19) is fixedly connected to the first sleeve (9); the first sprocket (18) and the two second sprockets (19) are connected via the chain (20).

6. The engine fault diagnosis equipment for mining heavy trucks according to claim 3 is characterized in that: A first receiving wheel (22) is installed on the side of the second sleeve (5) away from the support rod (6) and the side of the third sleeve (13) away from the limiting plug rod (14), and the connecting rope (8) is wound around the two first receiving wheels (22).

7. The engine fault diagnosis equipment for mining heavy trucks according to claim 6, characterized in that: Second receiving wheels (7) are symmetrically installed on both sides of the lower end of the storage box (1), and the connecting rope (8) is wound around the second receiving wheels (7).

8. The engine fault diagnosis equipment for mining heavy trucks according to claim 4 is characterized in that: A foam receiving mold (16) is installed in the storage box (4), and a receiving groove for use with a fault diagnosis instrument (1601) and a matching diagnostic instrument accessory (1602) is provided in the foam receiving mold (16).

9. The engine fault diagnosis equipment for mining heavy trucks according to claim 8, characterized in that: A rubber cushion is fixedly connected to the lower end surface of the lower pressing plate (11) via an adhesive.

10. A method for diagnosing engine faults of heavy-duty mining trucks, using the engine fault diagnosis device for heavy-duty mining trucks as claimed in claim 5, characterized in that: The main steps include: S1: When a mining heavy truck engine fails and needs to be diagnosed, the maintenance personnel first take the storage box (1) to the side of the engine; S2: Then the rotating block (15) can be rotated to release the downward pressure of the downward pressure component on the storage box (4). At this time, the support rod (6) will overcome the elastic force of the second spring (23) through the connecting rope (8) to pull the limit rod (14) into the third sleeve (13). When the limit rod (14) is completely separated from the limit opening on the fixed rod (17), the maintenance personnel can open the box cover (2) through the handle (201) and take out the fault diagnosis instrument (1601) and the matching diagnostic instrument accessories (1602) stored in the storage box (4) to prepare for engine fault diagnosis; S3: Use the taken out fault diagnosis instrument (1601) and the corresponding diagnostic instrument accessories (1602) to connect to the diagnostic interface of the mining heavy truck engine according to the operating instructions of the fault diagnosis instrument (1601), and ensure that the connection is firm and stable without any looseness; S4: Turn on the fault diagnosis instrument (1601), and select the diagnosis program and parameter setting matching the engine model of the mining heavy truck according to the prompt information on the display screen to ensure the accuracy and effectiveness of the diagnosis; S5: Start the engine (if the engine can be started) and put it in a suitable operating state so that the fault diagnosis instrument (1601) can collect various data during the operation of the engine, including but not limited to temperature, pressure, sensor signals, etc.; S6: The maintenance personnel make a preliminary judgment and analysis of the possible faults of the engine based on the real-time data and fault codes displayed by the fault diagnosis instrument (1601) and their own professional knowledge and experience, and determine the approximate scope and type of the fault, such as circuit fault, mechanical component fault, etc.; S7: Based on the initially determined fault range, further use diagnostic instrument accessories (1602), such as professional test probes, sensor simulators, etc., to conduct in-depth inspection and testing of relevant engine components and systems to obtain more detailed and accurate fault information to accurately locate the fault point, such as determining whether a certain line is short-circuited or open-circuited; S8: After completing the fault diagnosis of the engine, the fault diagnosis instrument (1601) and the diagnostic instrument accessories (1602) used in conjunction with it are put back into the storage box (4), ensuring that they are placed neatly and firmly to avoid damage during subsequent operations, and the box cover (2) is locked again.

Images