Repair method
By applying colorant and repair agent to the surface of the equipment, the problem of oil leakage was solved, enabling rapid repair without disassembling the equipment, simplifying the operation process and improving repair efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2025-10-30
- Publication Date
- 2026-05-15
AI Technical Summary
In existing technologies, disassembling the equipment, recoating it with liquid gaskets, and then reassembling it increases the operation time and makes it difficult to effectively repair oil leaks.
By applying different colored dyes to the surface of the equipment, scraping them off, and then applying a repair agent to cover the oil leak, the repair agent adheres to the liquid gasket and components, thus repairing the oil leak.
Oil leaks can be repaired without disassembling the equipment. The repair agent effectively seals the leaking parts, simplifying the operation process and improving repair efficiency.
Smart Images
Figure CN122032833A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a repair method. Background Technology
[0002] Japanese Patent Application Publication No. 2010-144645 discloses an apparatus for joining components together using a Formed In Place Gasket (FIPG) as a liquid gasket. Specifically, it discloses a method for disassembling the apparatus into components, recoating them with FIPG, and then reassembling them. Summary of the Invention
[0003] In cases of oil leakage from FIPG-based joints, as described in Japanese Patent Application Laid-Open No. 2010-144645, disassembling the equipment, recoating it with FIPG, and then reassembling it would result in time-consuming operations.
[0004] The repair method for solving the above-mentioned problem is a repair method for repairing oil leakage at the joint where multiple components are joined together by liquid gaskets in a device.
[0005] The repair method includes the following steps: applying a colorant of a different color than the coating surface to the portion of the oil leak surrounding the joint on the surface of the device.
[0006] The above repair method includes the following steps: scraping off the coated surface with the colorant along with the colorant until no colorant remains.
[0007] The above repair method includes the following steps: applying a repair agent capable of bonding with both the liquid gasket and the component that are joined together to the oil leak area to the portion where the colorant has been scraped off.
[0008] The above repair method can repair oil leaks without disassembling the equipment. Attached Figure Description
[0009] Hereinafter, with reference to the accompanying drawings, the features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described, in which the same reference numerals denote the same elements, and wherein:
[0010] Figure 1 This is a schematic diagram showing the location of an oil leak in the engine.
[0011] Figure 2 It means to observe from another direction. Figure 1 The diagram shows the engine's configuration.
[0012] Figure 3 This is a flowchart illustrating the steps of the repair method in the implementation method.
[0013] Figure 4 This is a schematic diagram showing the area to be treated on the surface portion of the engine in the repair method of the embodiment.
[0014] Figure 5 This is a schematic diagram showing the form of the repair agent applied to the engine in the repair method of the embodiment.
[0015] Figure 6 This is a schematic diagram illustrating an example of a device for which a modified repair method can be applied. Detailed Implementation
[0016] The following is for reference. Figures 1 to 5 One implementation of the repair method will be described.
[0017] Structure of Engine 10
[0018] like Figure 1 As shown, in the engine 10, the cylinder head 11 is assembled to the cylinder block 12. Hereinafter, the component consisting of the cylinder head 11 and the cylinder block 12 will be referred to as the engine body 20 in the engine 10.
[0019] like Figure 1 As shown, a chain cover 13 is installed at the end of the engine body 20. The engine body 20 and the chain cover 13 are connected to each other by a liquid gasket 14. The liquid gasket 14 is a formed-in-place gasket (FIPG).
[0020] like Figure 1 As shown, the chain cover 13 is fastened to the end face of the engine body 20 by multiple bolts. The first bolt 15 fastens the chain cover 13 to the end face of the cylinder head 11 in the engine body 20. The second bolt 16 fastens the chain cover 13 to the end face of the cylinder block 12 in the engine body 20.
[0021] Figure 2 Indicates from Figure 1 The position of A shown is facing Figure 1 The shape of engine 10 is observed in the direction of the dotted arrow. Chain cover 13 is... Figure 2 The portion of the chain cover 13 that is higher than the single-dot line engages with the cylinder head 11. Figure 2 The part lower than the single-dot dashed line in the middle is engaged with the cylinder block 12.
[0022] like Figure 1 As shown, the liquid gasket 14 is bonded to the part where the engine body 20 and the chain cover 13 are joined, i.e., the joint. Figure 2The portion further outward than the dotted line is the area between the engine body 20 and the chain cover 13, where a liquid gasket 14 is located. (Example) Figure 2 As shown, the liquid washer 14 is bonded to a recessed portion in the chain cover 13. Furthermore, the first bolt 15 and the second bolt 16 secure the engine body 20 and the chain cover 13 by passing through the liquid washer 14.
[0023] Thus, the engine 10 is a device that uses the cylinder head 11, cylinder block 12 and chain cover 13 as components and connects multiple components via a liquid gasket 14.
[0024] If the area where the liquid gasket 14 is applied is not adequately cleaned, the liquid gasket 14 may not adhere properly to the component, sometimes resulting in oil leakage from the joints between the components. Figure 1 In the image, point PL, indicated by a cross, represents the location of the oil leak.
[0025] If the engine 10 starts operating from a cold state, the cylinder head 11 is prone to expansion due to heat. At the joints between the cylinder head 11 and the chain cover 13, and between the cylinder block 12 and the chain cover 13, sufficient surface pressure is applied to the bolted portions, thus preventing oil leakage. On the other hand, the surface pressure between the bolts in the joints is lower than that at the bolted portions. Therefore, as... Figure 1 As shown at point PL, the portion between the first bolt 15 and the second bolt 16 in the joint stretches the liquid gasket 14 as the cylinder head 11 expands, thus making it prone to oil leakage.
[0026] Figure 3 This describes the steps for repairing an oil leak from a joint in engine 10. The following is a reference to... Figures 3 to 5 The procedure for repairing oil leaks is explained.
[0027] Repair method steps
[0028] like Figure 3 As shown, the workers intending to repair the oil leak first clean and degrease the area surrounding the leaking part on the surface of the engine 10 during operation S11. At the beginning... Figure 3 During the series of operations shown, the liquid gasket 14 sometimes deforms and protrudes from the joint to the outside of the engine 10. In operation S11, when the liquid gasket 14 protrudes from the joint to the outside of the engine 10, the operator removes the portion of the liquid gasket 14 that protrudes from the engine 10, i.e., the protrusion.
[0029] exist Figure 4 The surface portion of engine 10 is shown in the diagram. Figure 3The portion treated in the repair method shown is called range R. Range R is defined as the portion surrounding the oil leakage point in the joint, encompassing the entire oil leakage point. For example... Figure 4 As shown, the range R is set to include the entire joint located between the first bolt 15 and the second bolt 16.
[0030] In operation S11, the operator cleans and degreases the surface portion of the engine 10 within range R. Furthermore, in operation S11, if the liquid gasket 14 protrudes within range R, the operator removes the protrusion.
[0031] The operator who performed step S11 then proceeds to step S12. In step S12, the operator applies a colorant to a portion R of the engine 10. At this time, the operator uses a fluorescent paint that is a different color from the surface of the engine 10 and the liquid gasket 14 used for application. For example, in step S12, the operator uses a marker pen to color the portion R.
[0032] The operator who performed step S12 then proceeds to step S13. In step S13, the operator scrapes off the portion of the engine 10 surface that was colored in step S12, specifically the area R. At this point, the operator scrapes off the colored coating along with the colorant until no colorant remains. The operator may use a polishing machine, for example, to perform step S13.
[0033] The workers who performed S13 then proceeded to S14. In S14, the workers cleaned and degreased the area R that had been scraped off in S13.
[0034] The workers who performed S14 then proceeded to S15. In S15, the workers applied repair agent 17 to the engine 10. Figure 5 This indicates the form in which the repair agent 17 is applied to the engine 10.
[0035] The repair agent 17 is capable of bonding with both the liquid gasket 14 that joins the components in the engine 10 and the components in the engine 10. For example, the repair agent 17 is a liquid gasket 14 that has the property of bonding with the liquid gasket 14 that has been bonded to the engine 10 and joins the components to each other.
[0036] exist Figure 5 In step S15, repair agent 17 is applied along the joint within range R. During the operation, the worker applies repair agent 17 to the area where the colorant has been scraped off, covering the leaking area.
[0037] Sometimes an adhesive barrier layer forms on the surface portion of the engine 10 where an oil leak occurs. This adhesive barrier layer is formed, for example, by a release agent used during the die-casting process of the component.
[0038] Repair agent 17 is sometimes positioned on the surface of the component by bonding with hydroxyl groups on the surface of the component. If the adhesive barrier layer covers the surface of the component, repair agent 17 cannot bond with hydroxyl groups and be positioned on the surface of the component. Thus, the adhesive barrier layer is a layer that prevents repair agent 17 from adhering to the component.
[0039] Figure 3 The repair method shown involves coloring the area to which the repair agent 17 is bonded in operation S12, and then shaving off the colored portion in operation S13, thereby removing the adhesive barrier layer on the surface of the component. Thus, the repair agent 17 applied in operation S15 can be positioned on the surface of the engine 10.
[0040] The repair agent 17 was applied to the engine 10 by the operator during the S15 operation, thus completing the repair. Figure 3 The series of operations shown. The oil leak is repaired by sealing the leaking part with the repair agent 17 positioned on the surface of the engine 10.
[0041] The function of this implementation method
[0042] Sometimes, an adhesive barrier layer forms on the surface of the component, hindering the adhesion of the repair agent 17 to the component. In this case, even if the repair agent 17 is applied to seal the oil leak, it cannot be positioned at the oil leak location.
[0043] After removing the adhesive barrier layer, the above-described repair method involves applying repair agent 17 to seal the oil leak. Thus, repair agent 17 is positioned at the oil leak location.
[0044] Effects of this implementation method
[0045] (1) The above repair method can stop the oil leakage by applying repair agent 17 to the oil leakage area. Therefore, the above repair method can repair the oil leakage without disassembling the equipment.
[0046] (2) Sometimes, an oil leak occurs at the joint between the first bolt 15 and the second bolt 16 in the engine 10. In this case, the repair method involves applying a colorant to the entire area including the joint between the first bolt 15 and the second bolt 16. In the engine 10, at the end of the engine body 20 where the cylinder head 11 is assembled to the cylinder block 12, the chain cover 13 is installed via a liquid gasket 14.
[0047] If the colored area is set too narrowly, the treatment of the area to which the adhesive repair agent 17 is applied may be insufficient. In the case of oil leakage between the first bolt 15 and the second bolt 16, the above-described repair method defines the colored area in a manner that includes the entire joint between the bolted parts. Therefore, the above-described repair method allows the colored area to be reliably covered. Furthermore, according to the above-described repair method, the colored area is defined by marking the bolt positions, making it easy for operators to define the range.
[0048] (3) The repair method uses fluorescent paint as a colorant. This also considers situations where the work is being performed while the equipment is mounted on a vehicle, or where the equipment is in a dimly lit location. Therefore, the colorant is preferably a color that is easily understood. The repair method described above involves applying fluorescent paint to the component. This allows the repaired area to be clearly shown to the operator.
[0049] (4) The repair method includes the step of cleaning and degreasing the part to be coated with colorant before applying colorant (S11). The repair method includes the step of cleaning and degreasing the scraped part after scraping off the part coated with colorant (S14).
[0050] When the part is contaminated with mud or oil, the colorant does not adhere well. Furthermore, when the colorant is scraped off, shavings sometimes remain on the scraped area. In such cases, the repair agent 17 does not adhere well to the scraped area.
[0051] In the above repair method, the treated area is cleaned and degreased before coloring and after the colored portion is scraped off. Therefore, the above repair method facilitates the adhesion of the colorant and the repair agent 17.
[0052] Change Example
[0053] The above-described embodiments can be implemented in the following ways. The above-described embodiments and the following modifications can be combined with each other within the scope of technical inconsistency.
[0054] In the example above, an oil leak occurring at the joint between bolt 15 and bolt 16 in engine 10 was repaired. This repair method can also be applied to other parts.
[0055] Regarding the repair method, it can be applied as long as the oil leak occurs in the joint of the engine 10, even if the oil leak is not between the first bolt 15 and the second bolt 16.
[0056] The repair method can also be applied to equipment other than engine 10. Figure 6This refers to an example of a device that can apply the repair method of the modified example. Figure 6 The device shown includes a first component 18 and a second component 19 as components. The first component 18 and the second component 19 are connected to each other by a liquid gasket 14.
[0057] exist Figure 6 In the image, point PL2, indicated by a cross, represents an example of the location of the oil leak. For example... Figure 6 As shown, in a device where multiple components are joined together via a liquid gasket 14, the repair method can be applied to situations where oil leakage occurs from the joint. For example, the repair method can be applied to a transmission where multiple components are joined together via the liquid gasket 14.
[0058] The repair method described above treats a portion of the joint between the first bolt 15 and the second bolt 16, i.e., range R. The range treated in the repair method is not limited to the aforementioned range R. For example, the range treated in the repair method may include a portion of the joint between the first bolt 15 and the second bolt 16. The repair method may not use fluorescent paint as a coloring agent.
[0059] The repair method may not include the steps of cleaning and degreasing the area to be colored before applying the colorant. Similarly, the repair method may not include the steps of cleaning and degreasing the scraped-off area after scraping off the colored-on area.
Claims
1. A repair method for repairing oil leakage at the joint where multiple components are joined together by liquid gaskets in a device, characterized in that... Includes the following steps: In the surface portion of the device, a colorant of a different color than the coating surface is applied to the portion surrounding the oil leakage area in the joint; The coated surface with the colorant is scraped off along with the colorant until no colorant remains. and The repair agent, which can bond with both the liquid gasket and the component that are joined together, is applied to the portion where the colorant has been scraped off, in a manner that covers the oil leak.
2. The repair method according to claim 1, characterized in that, In an engine in which a chain cover is mounted at the end of the engine body, with the cylinder head assembled onto the cylinder block, via the liquid gasket, When the oil leak is located at the joint. The colorant is applied to the entire area including the joint located between the first bolt and the second bolt. The joint is located between the first bolt that secures the chain cover to the end face of the cylinder head in the engine body and the second bolt that secures the chain cover to the end face of the cylinder block in the engine body.
3. The repair method according to claim 1 or 2, characterized in that, Fluorescent paint is used as the colorant.
4. The repair method according to claim 1 or 2, characterized in that, Includes the following steps: Before applying the colorant, the portion to which the colorant will be applied is cleaned and degreased; and After scraping off the portion coated with the colorant, the scraped portion is cleaned and degreased.