Diesel engine valve chamber cover cap structure

Abstract

The utility model discloses a valve chamber cover structure of a diesel engine. Comprising a valve chamber cover cap body, a cavity, a camshaft bearing cap functional section, a first sealing surface, a first mounting hole for mounting a camshaft signal sensor, an oil sprayer mounting via hole, a third sealing surface matched with a cylinder cover and a second mounting hole for mounting an oil filler cap, wherein the cavity, the camshaft bearing cap functional section and the first sealing surface are all arranged on the valve chamber cover cap body; an oil-gas separator labyrinth cavity is further formed in the valve chamber cover body, a second sealing face used for being matched with an oil-gas separator is arranged on the periphery of the oil-gas separator labyrinth cavity, and an oil-gas separator labyrinth cavity oil return groove and an air cylinder cover attachment face oil return groove are formed in the bottom of the oil-gas separator labyrinth cavity. The camshaft bearing cap and the oil-gas separator are integrated at the same time, the integration degree is high, the types of materials of an engine installation production line are reduced, the number of material preparation boxes in the automation process can be reduced, and therefore the equipment cost and the process time are saved.

Description

Technical Field

[0001] This utility model relates to the field of valve cover technology, and in particular to a diesel engine valve cover structure. Background Technology

[0002] The engine valve cover is a sealed cover located at the top of the engine, typically mounted on the cylinder head. Its function is to ensure that the lubricating oil running on the cylinder head remains inside the engine and does not leak out. In overhead camshaft engines, a camshaft bearing cap is usually installed on the cylinder head to support and position the camshaft. Then, the valve cover covers the cylinder head, enclosing the valves, camshaft, and camshaft bearing cap to form a sealed space. Furthermore, to maintain internal pressure balance and a pressure environment conducive to efficient combustion, an oil separator is usually installed. Installing the oil separator at the top of the engine allows it to operate at its optimal efficiency; therefore, the valve cover is the best component for installing the oil separator. The current engine valve cover mounting structure, which internally accommodates the camshaft bearing cap and externally provides space for the oil separator, results in a relatively high height above the engine cylinder head.

[0003] Existing integrated valve cover designs have a single functional structure. This traditional installation method involves a wide variety of materials in the engine installation production line, which is not only unsuitable for the increasingly compact space requirements of modern automobiles, but also results in high installation costs and time consumption. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing valve cover structures, which are simple in structure and involve a wide variety of materials in the engine installation production line, and to provide a diesel engine valve cover structure.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model provides a diesel engine valve chamber cover structure, including a valve chamber cover body, cavities all disposed on the valve chamber cover body for covering the valve chamber, a camshaft bearing cover functional section, a first sealing surface for cooperating with the gear chamber, a first mounting hole for installing a camshaft signal sensor, an injector mounting through hole, a third sealing surface for cooperating with the cylinder head, and a second mounting hole for installing a filler cap. The valve chamber cover body is also provided with an oil-gas separator labyrinth cavity, and the oil-gas separator labyrinth cavity is surrounded by a second sealing surface for cooperating with the oil-gas separator. The bottom of the oil-gas separator labyrinth cavity is provided with an oil-gas separator labyrinth cavity return oil groove and a return oil groove to the cylinder head mating surface.

[0007] This utility model has the following advantages:

[0008] This solution integrates a camshaft bearing cover, an oil-gas separator labyrinth cavity, and a second sealing surface that cooperates with the oil-gas separator on the valve cover body. It not only has the function of a valve cover, but also integrates a camshaft bearing cover and an oil-gas separator. The high degree of integration reduces the types of materials in the engine installation production line and can reduce the number of material boxes in the automation process, thereby saving equipment costs and process time. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is an external axonometric view of the diesel engine valve chamber cover structure of this utility model;

[0011] Figure 2 This is an internal axonometric view of the diesel engine valve chamber cover structure of this utility model;

[0012] Figure 3 This is a bottom view of the diesel engine valve chamber cover structure of this utility model;

[0013] Figure 4 This is a top view of the diesel engine valve chamber cover structure of this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] To improve the integration of the valve cover, thereby reducing the types of materials used in the engine installation production line and decreasing installation equipment costs and time, this utility model discloses a diesel engine valve cover structure. For example... Figures 1 to 4 As shown, the valve cover structure includes a valve cover body 1, a cavity 11, a camshaft bearing cover functional section 14, a first sealing surface 13, a first mounting hole 18, an injector mounting through hole 12, a third sealing surface 19, a second mounting hole 15, an oil-gas separator labyrinth cavity 17, and a second sealing surface 16. The cavity 11, the camshaft bearing cover functional section 14, the first sealing surface 13, the first mounting hole 18, the injector mounting through hole 12, the third sealing surface 19, the second mounting hole 15, the oil-gas separator labyrinth cavity 17, and the second sealing surface 16 are all disposed on the valve cover body 1.

[0021] The cavity 11 is used to cover the valve chamber; the first sealing surface 13 is used to mate with the gear chamber; the first mounting hole 18 is used to install the camshaft signal sensor; the third sealing surface 19 is used to mate with the cylinder head; the second mounting hole 15 is used to install the filler cap; the second sealing surface 16 is disposed around the labyrinth cavity 17 of the oil-gas separator for mate with the oil-gas separator; the bottom of the labyrinth cavity 17 of the oil-gas separator is provided with an oil-gas separator labyrinth cavity return oil groove 20 and a return cylinder head mating surface return oil groove 21. The oil-gas separator labyrinth cavity return oil groove 20 and the return cylinder head mating surface return oil groove 21 are connected by bolt holes, which facilitates the return of oil in the labyrinth cavity into the cylinder head, and can realize primary oil-gas separation; combined with the second sealing surface 16 and the labyrinth cavity 17 of the oil-gas separator, the height of the primary separation cavity of the oil-gas separator can be reduced while satisfying the installation of the oil-gas separator, thus achieving the purpose of reducing the height.

[0022] The above structure not only functions as a valve cover, but also integrates a camshaft bearing cover and an oil-gas separator, resulting in a high degree of integration.

[0023] To improve support strength, the camshaft bearing cover has 10 functional sections 14, evenly spaced on both sides of the injector mounting hole 12. Specifically, as shown... Figure 2 As shown, the engine features a double overhead camshaft structure. Each camshaft has 10 camshaft bearing cap functional sections evenly distributed on both sides of the center of the cylinder bore it operates on. These sections are semi-cylindrical and are designated as follows: First Camshaft Bearing Cap Functional Section 1401, Second Camshaft Bearing Cap Functional Section 1402, Third Camshaft Bearing Cap Functional Section 1403, Fourth Camshaft Bearing Cap Functional Section 1404, Fifth Camshaft Bearing Cap Functional Section 1405, Sixth Camshaft Bearing Cap Functional Section 1406, Seventh Camshaft Bearing Cap Functional Section 1407, Eighth Camshaft Bearing Cap Functional Section 1407, Ninth Camshaft Bearing Cap Functional Section 1409, and Tenth Camshaft Bearing Cap Functional Section 1410. The 10 camshaft bearing cap functional sections are evenly distributed on both sides of each cylinder bore, ensuring uniform and fixed constraint on the camshafts and guaranteeing high-efficiency support strength. The clamping bolt holes on both sides of each semi-cylindrical surface ensure the clamping force on the camshaft, making the valve cover more reliably fixed to the camshaft; the integrated structure realizes the function of the camshaft bearing cover, eliminating the space required for the safety clearance in the non-integrated state, thus further reducing the height of the valve cover.

[0024] Based on any of the above structures, such as Figure 3As shown, the edge of the third sealing surface 19 is provided with a sol-gel tank and a pipeline-type glue application line 191. This structure separates the inner and outer cavities of the cylinder head and the areas inside and outside the injector mounting holes, achieving the function of sealing the lubricating oil inside the cylinder head. Compared with existing structural designs, it can reduce the number of injector hole sealing rings by four and valve cover gaskets by one. The continuous glue application line facilitates continuous glue application during assembly and effectively prevents misapplication or leakage.

[0025] Based on any of the above structures, the labyrinth cavity 17 of the oil-gas separator preferably adopts a T-shaped structure.

[0026] With the above structure, the valve cover structure meets the sealing requirements with the cylinder head, gear chamber, oil-gas separator, and injector mounting holes. It also provides space for the labyrinth cavity of the oil-gas separator, which can reduce the volume of the oil-gas separator assembly and save installation space. At the same time, the camshaft bearing cover is integrated into the valve cover body as a whole, reducing the types and quantities of materials, omitting the assembly process of the camshaft bearing cover, and speeding up the production operation of the assembly line.

[0027] For example, with Figures 1 to 4 The structure shown integrates the existing structure, which requires 10 camshaft bearing caps, 20 camshaft bearing cap locating pins, 4 injector hole sealing rings, 1 valve cover gasket, 1 valve cover, and 1 oil-gas separator, totaling 37 parts. This integration reduces the number of parts required to only 1 valve cover and 1 oil-gas separator, thus greatly simplifying the assembly process and shortening the automation assembly process.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A diesel engine valve cover structure, comprising a valve cover body (1), cavities (11) all disposed on the valve cover body (1) for covering the valve chamber, a camshaft bearing cover functional section (14), a first sealing surface (13) for cooperating with a gear chamber, a first mounting hole (18) for mounting a camshaft signal sensor, an injector mounting through hole (12), a third sealing surface (19) for cooperating with a cylinder head, and a second mounting hole (15) for mounting a filler cap, characterized in that: The valve cover body (1) is also provided with an oil-gas separator labyrinth cavity (17). The oil-gas separator labyrinth cavity (17) is provided with a second sealing surface (16) for cooperating with the oil-gas separator around its perimeter. The bottom of the oil-gas separator labyrinth cavity (17) is provided with an oil-gas separator labyrinth cavity return oil groove (20) and a return cylinder head mating surface return oil groove (21).

2. The diesel engine valve chamber cover structure according to claim 1, characterized in that: The camshaft bearing cover has 10 functional sections (14), which are evenly distributed on both sides of the injector mounting hole (12).

3. The diesel engine valve chamber cover structure according to claim 2, characterized in that: The camshaft bearing cover functional section (14) is semi-cylindrical, and each camshaft bearing cover functional section (14) has clamping bolt holes on both sides.

4. The diesel engine valve chamber cover structure according to claim 1, characterized in that: The edge of the third sealing surface (19) is provided with a sol tank and a pipeline-type glue application line (191).

5. The diesel engine valve chamber cover structure according to claim 1, characterized in that: The labyrinth cavity (17) of the oil-gas separator is T-shaped.

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