Engine oil pan and engine

Abstract

The application provides an engine oil pan and an engine, the engine oil pan comprising a cavity part with an upward opening, a bottom surface of the cavity part being divided into at least two surface regions, and each of the surface regions being staggered with each other in a height direction. The application can improve the modal and dynamic stiffness of the engine oil pan, reduce the radiation noise of the engine, and improve the performance of the whole vehicle.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to an engine oil pan and an engine. Background Technology

[0002] The oil pan assembly primarily stores lubricating oil (e.g., engine oil), which circulates to provide cooling and lubrication for the moving parts of the engine assembly. As a thin-walled component, the oil pan typically has a large surface area and low rigidity, resulting in significant radiated noise. Statistics show that the radiated noise from the oil pan accounts for 15%-30% of the total radiated noise of the engine assembly, making it a major source of engine assembly noise and significantly impacting overall vehicle performance. Utility Model Content

[0003] This application provides an engine oil pan and an engine to improve the modal and dynamic stiffness of the engine oil pan, reduce engine radiated noise, and improve overall vehicle performance.

[0004] The first aspect of this application provides an engine oil pan, the engine oil pan including an upward-opening cavity portion, the bottom surface of the cavity portion being divided into at least two surface regions, each of the surface regions being staggered from each other along the height direction.

[0005] Optionally, the bottom surface of the cavity is provided with a guide groove, the wall surface of the cavity is provided with an oil drain hole, the oil drain hole is close to the bottom surface of the cavity, and the oil drain hole is located at one end of the guide groove; The guide channel includes at least two surface regions, and the height of each surface region in the guide channel decreases sequentially along the direction close to the oil drain hole.

[0006] Optionally, at least a portion of the surface area is provided with an irregular reinforcing structure, wherein the irregular reinforcing structure is convex on the inner side of the cavity and concave on the outer side of the cavity.

[0007] Optionally, the bottom surface of the cavity is provided with a plurality of first ribs, the first ribs protruding from the outer side of the cavity and extending along the width direction of the guide groove, and each of the first ribs is connected in sequence to form an M-shaped structure.

[0008] Optionally, a transition region is connected between two adjacent surface regions, a second rib is provided on the inner side of the cavity, and at least a portion of the transition region is provided with a second rib, the second rib connecting the wall and bottom surface of the cavity.

[0009] Optionally, the wall of the cavity includes a concave section, which is located below the main oil passage opening; The concave section has a third rib extending laterally on its outer side, and / or the concave section has a triangular support platform on one side of the cavity portion in the circumferential direction, the support platform being recessed into the top surface of the engine oil pan.

[0010] Optionally, the top of the engine oil pan is provided with a first flange, the front side of the cavity portion forms the front end face of the engine oil pan, and the front end of the engine oil pan is provided with a longitudinally extending fourth rib, the fourth rib connecting the first flange and the front end face; The lower section of the front end face has a shaving surface, and / or the side of the fourth rib facing away from the front end face has a smooth multi-segment curved surface.

[0011] Optionally, the top of the engine oil pan is provided with a first flange, and the rear end of the engine oil pan is provided with a second flange. The second flange and the first flange are separated in a vertical direction. A reinforcing post is provided in the gap. The two ends of the reinforcing post are respectively connected to the first flange and the second flange. The reinforcing post has a cylindrical structure with an opening facing downward.

[0012] Optionally, the engine oil pan includes a downward-opening arc-shaped channel, the arc-shaped channel being located behind the cavity portion, and the side of the arc-shaped channel away from the cavity portion being connected to the second flange; The number of reinforcing columns is not less than two, and a fifth rib extending laterally is provided in the interval. The fifth rib is disposed between two adjacent reinforcing columns and connects the two adjacent reinforcing columns and the surface of the arc-shaped channel.

[0013] A second aspect of this application provides an engine that includes any of the engine oil pans provided in this application.

[0014] The technical solution provided in this application can achieve the following beneficial effects: The engine oil pan provided in this application includes an upward-opening cavity. The bottom surface of the cavity is divided into at least two surface regions, which are staggered along the height direction. In other words, the cavity is composed of at least two surface regions with different heights, so that the bottom surface of the cavity presents a stepped or uneven shape. This can reduce the stress span of each surface region, increase rigidity, and transform the planar stress on the bottom surface of the cavity into a three-dimensional stress, making more effective use of the material's own strength. This improves the modal and dynamic stiffness of the engine oil pan, reduces engine radiated noise, and improves overall vehicle performance.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an engine oil pan provided in an embodiment of this application; Figure 2 Figure 1 A schematic diagram of the engine oil pan from another angle; Figure 3 for Figure 1 A schematic diagram showing the top view of the engine oil pan; Figure 4 for Figure 1 The diagram shows the state of the engine oil pan.

[0017] Figure label: 1-Cavity section; 11-Bottom surface; 11a - Surface region; 11b - Transition region; 111-Guide channel; 112 - Irregular reinforced structure; 113 - First tendon; 114 - Second rib; 12-Wall surface; 121 - Concave segment; 122-Third rib; 123 - Support platform; 124 - Oil drain hole; 13-Reduction surface; 14-Fourth rib; 141 - Multi-segment surface; 15 - Oil outlet hole; 16 - First section of oil passage; 17-Second oil passage; 2-Arc-shaped channel; 21-Thick ribs; 3-First flange; 31 - Main oil passage hole; 4-Second flange; 5-Third flange; 6-Strengthening column; 7 - Fifth tendon. The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0021] like Figures 1-4 As shown in the figure, this application embodiment provides an engine oil pan that can be applied to hybrid engines and direct-drive engines. It features a reliable structure, excellent performance, and meets the performance requirements of the lubrication system and the functional requirements of the vehicle layout. Actual measurement data verifies that the engine oil pan provided in this application embodiment can reduce radiated noise by approximately 2.4 dB.

[0022] The engine oil pan may have a first flange 3 on its top, with the mounting surface of the first flange 3 facing upwards. The first flange 3 is used to connect to the engine block. The first flange 3 may have a locating pin hole, a first connecting hole, and a main oil passage opening. The locating pin hole assists in quick positioning during assembly with the cylinder block, the first connecting hole is used to install bolts, and the main oil passage opening connects to the main oil passage of the cylinder block. The inner side of the first flange 3 may have a chamfered sol-gel groove, a T-shaped sol-gel groove, etc., to improve sealing and reduce the risk of oil leakage.

[0023] A second flange 4 may be provided at the rear end of the engine oil pan. The mounting surface of the second flange 4 faces rearward and is used to connect the alternator or transmission. The second flange 4 is arc-shaped, with the concave surface facing upward and the convex surface facing downward. A second connecting hole may be provided on the second flange 4 for installing bolts. That is, the rear end of the engine oil pan is connected to the alternator or transmission via bolts.

[0024] A third flange 5 can be installed on one side of the engine oil pan along the width direction. The third flange 5 is arranged side by side with the cavity part 1. The mounting surface of the third flange 5 faces downward. The third flange 5 is used to connect the oil filter. That is to say, the oil filter is installed vertically from bottom to top and fixed with bolts. There is no obstruction below, which solves the problem of difficult disassembly and installation of the oil filter in the whole vehicle due to the small space.

[0025] In addition, the outer side of the engine oil pan can be integrated with drive shaft mounting bosses, compressor mounting bosses, rear crankcase oil seal mounting holes, oil dipstick guide mounting bosses, drain plug mounting bosses, soundproof cover mounting bosses, etc., as needed.

[0026] Furthermore, the engine oil pan provided in this embodiment includes an upward-opening cavity 1, which stores lubricating oil and houses an oil pump. The oil pump delivers the lubricating oil stored in the cavity 1 to various moving parts of the engine or generator to achieve functions such as cooling and lubrication. The engine oil pan also includes a downward-opening arc-shaped channel 2 located behind the cavity 1. The arc-shaped channel 2 is used to arrange an exhaust pipe, allowing a portion of the exhaust pipe to be embedded below the engine oil pan, thus providing conditions for a reasonable layout of vehicle components.

[0027] Furthermore, the cavity 1 integrates an oil outlet 15, a first oil passage 16, and a second oil passage 17. The first oil passage 16 is connected to the oil filter, and the second oil passage 17 is connected to the main oil passage hole 31. Unlike the traditional method of installing the oil filter in the main oil passage of the cylinder block, this embodiment integrates the third flange 5 on the lower side of the engine oil pan and integrates two oil passages in the cavity 1. This built-in oil circuit design is compact and simple, meets the oil pressure performance requirements of the lubrication system, and also meets the overall vehicle layout and avoidance requirements.

[0028] Specifically, during operation, the lubricating oil flow path is as follows: oil pump suction port → oil pump → oil outlet 15 → oil filter → first section oil passage 16 → second section oil passage 17 → main oil passage hole 31 → cylinder block main oil passage. This oil circuit design is simple, with low flow resistance loss, and the oil entering the main oil passage is effectively filtered, ensuring effective lubrication and cleanliness requirements of the engine assembly system.

[0029] Each oil passage features adhesive-receiving grooves at both the inlet and outlet. Areas with lower local pressure are reinforced to improve sealing performance and reduce the likelihood of sealant entering the oil passages during the adhesive application process and affecting flow resistance. The diameter of each oil passage is at least 12mm, with the specific diameter designed according to the oil pressure requirements of the lubricated components. Variable diameter oil passages can be used, facilitating manufacturing and reducing flow resistance while improving engine thermal efficiency. Each oil passage can be pre-cast and then partially machined, meeting usage requirements while reducing manufacturing costs.

[0030] Furthermore, the bottom surface 11 of the cavity 1 is divided into at least two (including two or more) surface regions 11a, and each surface region 11a is staggered from each other along the height direction. That is to say, the cavity 1 is spliced ​​together by at least two surface regions 11a with different heights, so that the bottom surface 11 of the cavity 1 presents a stepped or concave-convex shape as a whole. This can reduce the stress span of each surface region 11a and increase the stiffness. It can also transform the planar stress of the bottom surface 11 of the cavity 1 into a three-dimensional spatial stress, making more effective use of the strength of the material itself, thereby improving the modal and dynamic stiffness of the engine oil pan, reducing the engine's radiated noise, and improving the overall vehicle performance.

[0031] Furthermore, the bottom surface 11 of the cavity 1 is provided with a downwardly recessed guide groove 111 (i.e., Figure 3 (The area indicated by the dashed arrow) The wall 12 of the cavity 1 is provided with an oil drain hole 124. The oil drain hole 124 is close to the bottom surface 11 of the cavity 1. The oil drain hole 124 can be closed by means of components such as an oil drain bolt. When the oil drain hole 124 is open, the lubricating oil contained in the cavity 1 flows along the guide groove 111 to the oil drain hole 124 and is discharged through the oil drain hole 124.

[0032] Furthermore, the guide channel 111 includes at least two surface regions 11a. Along the direction near the drain hole 124, each surface region 11a within the guide channel 111 (i.e., Figure 3 The height of the three surface regions 11a) that the dashed arrows pass through in sequence decreases in sequence, so that the guide groove 111 has a stepped groove shape with gradually decreasing height, which allows the lubricating oil in the guide groove 111 to flow to the drain hole 124 more quickly and improve the draining efficiency.

[0033] Furthermore, at least a portion of the surface region 11a is provided with an irregular reinforcing structure 112. The irregular reinforcing structure 112 is convex on the inner side of the cavity portion 1 and concave on the outer side of the cavity portion 1. By providing the irregular reinforcing structure 112, the surface region 11a is further divided, making the surface region 11a present a stepped or concave-convex shape, further improving the modal and dynamic stiffness of the engine oil pan.

[0034] Furthermore, the bottom surface 11 of the cavity portion 1 is provided with a plurality of first ribs 113. The first ribs 113 protrude from the outer side of the cavity portion 1 and extend along the width direction of the guide groove 111. The first ribs 113 are connected in sequence to form an M-shaped structure. By connecting the first ribs 113 into a whole, stress can be transferred and dispersed among the first ribs 113, thereby improving the overall stress performance and enhancing the modal and dynamic stiffness of the engine oil pan.

[0035] Furthermore, a transition region 11b connects two adjacent surface regions 11a, extending vertically to connect the two surface regions 11a at different heights. A second rib 114 is provided on the inner side of the cavity portion 1, and at least a portion of the transition region 11b is provided with the second rib 114. The second rib 114 connects the wall surface 12 and the bottom surface 11 of the cavity portion 1. The second rib 114 connects the vertical surface of the bottom surface 11 to the wall surface 12 into a whole, improving the vertical support strength and thus enhancing the overall load-bearing performance, improving the modal and dynamic stiffness of the engine oil pan.

[0036] Furthermore, the wall surface 12 of the cavity portion 1 includes a concave section 121, which is located below the main oil passage opening. The concave section 121 is a vertically extending convex shape on the inner side of the cavity portion 1 and a vertically extending recess on the outer side of the cavity portion 1. By providing the concave section 121, a larger clearance space can be formed on the outer side of the cavity portion 1, and the first flange 3 can also be locally widened to meet the sealing requirements of the main oil passage opening.

[0037] Furthermore, a third rib 122 extending laterally is provided on the outer side of the concave section 121 to increase the rigidity of the concave section 121 and reduce its vibration or deformation. A triangular support platform 123 is provided on one side of the concave section 1 along the circumference of the cavity portion 1. The support platform 123 is recessed into the top surface of the engine oil pan, thereby giving the top of the concave section 121 a stepped or uneven shape, further improving the modal and dynamic rigidity of the engine oil pan.

[0038] Furthermore, the forward side of the cavity portion 1 forms the front end face of the engine oil pan. The front end of the engine oil pan is provided with a longitudinally extending fourth rib 14, which connects the first flange 3 to the front end face. A section of the lower part of the front end face has a shaving surface 13, thereby reducing the radiation surface of the engine oil pan's front end and lowering noise radiation. The side of the fourth rib 14 facing away from the front end face has a smooth, multi-segment curved surface 141, thereby dispersing sound wave energy and reducing noise radiation.

[0039] Furthermore, the second flange 4 and the first flange 3 are vertically spaced apart, and a reinforcing column 6 is provided within the space. The two ends of the reinforcing column 6 are connected to the first flange 3 and the second flange 4, respectively. The reinforcing column 6 has a cylindrical structure with its opening facing downwards. By setting the cylindrical reinforcing column 6, the vertical support strength can be significantly improved, thereby increasing the dynamic stiffness of the engine housing.

[0040] Furthermore, the side of the arc-shaped channel 2 away from the cavity 1 is connected to the second flange 4, allowing the second flange 4 and the cavity 1 to be smoothly connected via a large-diameter arc surface. Circumferentially extending stiffening strips 21 (approximately 4mm~8mm wide and 10mm~12mm high) can be provided on the inner and outer sides of the arc-shaped channel 2 to increase the connection strength between the second flange 4 and the cavity 1, thereby increasing the overall rigidity.

[0041] Furthermore, there are at least two reinforcing pillars 6, with a transversely extending fifth rib 7 between them. The fifth rib 7 is located between two adjacent reinforcing pillars 6 and connects the surfaces of the two adjacent reinforcing pillars 6 and the arc-shaped channel 2. The fifth rib 7 connects and strengthens the reinforcing pillars 6, the fifth rib 7, and the arc-shaped channel 2 into a whole, thereby effectively improving the dynamic stiffness of the engine housing.

[0042] In addition, this application also provides an engine, which includes any of the engine oil pans provided in this application.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An engine oil pan, characterized in that, The engine oil pan includes an upward-opening cavity, the bottom surface of which is divided into at least two surface regions, each surface region being staggered from the other along the height direction.

2. The engine oil pan according to claim 1, characterized in that, The bottom surface of the cavity is provided with a flow guide groove, and the wall surface of the cavity is provided with an oil drain hole. The oil drain hole is close to the bottom surface of the cavity and is located at one end of the flow guide groove. The flow channel includes at least two surface regions, and the height of each surface region in the flow channel decreases sequentially along the direction close to the oil drain hole.

3. The engine oil pan according to claim 2, characterized in that, At least a portion of the surface area is provided with an irregular reinforcing structure, wherein the irregular reinforcing structure is convex on the inner side of the cavity and concave on the outer side of the cavity.

4. The engine oil pan according to claim 2, characterized in that, The bottom surface of the cavity is provided with a plurality of first ribs, which protrude from the outer side of the cavity and extend along the width direction of the guide groove. Each first rib is connected in sequence to form an M-shaped structure.

5. The engine oil pan according to claim 1, characterized in that, A transition region connects two adjacent surface regions. A second rib is provided on the inner side of the cavity. At least a portion of the transition region is provided with a second rib. The second rib connects the wall and bottom surface of the cavity.

6. The engine oil pan according to claim 1, characterized in that, The wall of the cavity includes a concave section, which is located below the main oil passage opening; The concave section has a third rib extending laterally on its outer side, and / or the concave section has a triangular support platform on one side of the cavity portion in the circumferential direction, the support platform being recessed into the top surface of the engine oil pan.

7. The engine oil pan according to any one of claims 1-6, characterized in that, The top of the engine oil pan is provided with a first flange, and the front side of the cavity portion forms the front end face of the engine oil pan. The front end of the engine oil pan is provided with a longitudinally extending fourth rib, and the fourth rib connects the first flange and the front end face. The lower section of the front end face has a shaving surface, and / or the side of the fourth rib facing away from the front end face has a smooth multi-segment curved surface.

8. The engine oil pan according to any one of claims 1-6, characterized in that, The engine oil pan has a first flange at the top and a second flange at the rear end. The second flange and the first flange are separated in a vertical direction. A reinforcing post is provided in the gap. The two ends of the reinforcing post are respectively connected to the first flange and the second flange. The reinforcing post has a cylindrical structure with an opening facing downward.

9. The engine oil pan according to claim 8, characterized in that, The engine oil pan includes a downward-opening arc-shaped channel, which is located behind the cavity portion, and the side of the arc-shaped channel away from the cavity portion is connected to the second flange; The number of reinforcing columns is not less than two, and a fifth rib extending laterally is provided in the interval. The fifth rib is disposed between two adjacent reinforcing columns and connects the two adjacent reinforcing columns and the surface of the arc-shaped channel.

10. An engine, characterized in that, Includes the engine oil pan as described in any one of claims 1-9.

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