Crankcase respirator and engine
By arranging the oil filter and vertical return pipe on the top surface of the engine cylinder block, combined with the optimized design of the exhaust gas intake and discharge pipes, the problems of inconvenient replacement of the crankcase respirator and blocked emissions of low-temperature exhaust gas are solved, and the replacement efficiency and equipment adaptability are improved.
Patent Information
- Application Number
- CN202422939921.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing crankcase respirators are inconvenient to replace in the engine compartment, especially in environments with small spaces such as excavators, and the exhaust gas emission pipes are easily blocked by ice in low temperature environments.
The oil filter is arranged on the top surface of the cylinder block, the oil return pipe is arranged in the vertical direction, the exhaust gas intake pipe is connected between the cylinder groups on the top surface of the cylinder block, the outer side of the exhaust gas discharge pipe is wrapped in the insulation layer, the oil return path is simplified, and the resistance of the exhaust gas discharge pipe is reduced.
It realizes the convenient replacement of the oil filter of the crankcase respirator, reduces the resistance to oil return, avoids ice blockage in the exhaust gas discharge pipe, and improves replacement efficiency and equipment adaptability.
Smart Images
Figure CN223270043U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of engine technology, and in particular to a crankcase breather and an engine. Background Art
[0002] When the engine is operating, fuel combustion in the cylinder causes the gas to expand, pushing the piston. Some of this expanding gas leaks into the crankcase through the gap between the piston and cylinder. This increases the pressure inside the crankcase, necessitating a crankcase breather connected to the crankcase to allow for exhaust.
[0003] The exhaust gas in the crankcase also contains evaporated oil, exhaust gas and residual fuel gas. The crankcase breather needs to separate the oil when exhausting, return the oil to the oil pan, and then discharge the exhaust gas.
[0004] Existing crankcase breathers are typically installed on the side of the engine cylinder. Consequently, the space around the sides of the cylinder in an excavator's engine compartment is narrow, making crankcase breather replacement inconvenient. The top surface of the cylinder is the engine cover, and when the cover is opened, there is more working space above the top surface of the cylinder.
[0005] In order to facilitate the replacement of the crankcase breather, the present application provides an arrangement structure of the crankcase breather. Utility Model Content
[0006] In order to overcome the problems existing in the related art, the first aspect of the present application provides a crankcase breather, comprising: an oil filter, an oil return pipe, an exhaust gas discharge pipe and an exhaust gas intake pipe;
[0007] One end of the oil return pipe, the exhaust gas discharge pipe, and the exhaust gas intake pipe are respectively connected to the oil filter, the other end of the oil return pipe is connected to the oil pan on the bottom surface of the cylinder body, the other end of the exhaust gas discharge pipe is connected to the external space, and the other end of the exhaust gas intake pipe is connected to the crankcase on the top surface of the cylinder body;
[0008] The oil filter is arranged on the top surface of the cylinder block.
[0009] In one embodiment, the oil outlet of the oil filter is arranged at the bottom, the exhaust gas outlet is arranged at the top, and the exhaust gas inlet is arranged at the side wall.
[0010] In one embodiment, the exhaust gas intake pipe is connected between adjacent cylinder groups on the top surface of the cylinder block, and the cylinder group is a group of cylinders arranged in the same direction.
[0011] In one embodiment, the outer side of the exhaust gas discharge pipe is wrapped with a thermal insulation layer.
[0012] In one embodiment, the oil return pipe is arranged in a vertical direction.
[0013] A second aspect of the present application provides an engine comprising the crankcase breather described in the present application.
[0014] In one embodiment, two crankcase breathers are provided.
[0015] In one embodiment, the two crankcase breathers are arranged on the top surface of the cylinder block at both ends along the axial direction of the crankshaft.
[0016] The technical solution provided by this application may have the following beneficial effects:
[0017] The crankcase breather illustrated in this application makes it easier to replace the oil filter. Unlike existing crankcase breathers, which are located near the oil pan, i.e., at the bottom of the engine, in this embodiment, the oil return pipe connects the cylinder top surface and the oil pan at both ends, respectively, reducing the resistance to oil return. The oil filter is positioned at a height close to the cylinder top surface. When the oil filter needs to be replaced, the oil filter can be directly removed and installed by opening the engine hood.
[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.
[0020] Figure 1 This is a schematic diagram of the arrangement structure of the crankcase breather shown in an embodiment of the present application;
[0021] Figure 2 A three-dimensional structural diagram of an exhaust gas discharge pipe of a crankcase breather shown in an embodiment of the present application;
[0022] Figure 3 for Figure 2 A schematic longitudinal section of an exhaust gas discharge pipe is shown;
[0023] Description of the accompanying drawings: oil filter 10, oil return pipe 11, exhaust gas discharge pipe 12, pipe wall 120, insulation layer 121, exhaust gas intake pipe 13. DETAILED DESCRIPTION
[0024] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0025] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0026] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0027] Example 1
[0028] Existing crankcase breathers are typically installed on the side of the engine cylinder. Consequently, the space around the sides of the cylinder in an excavator's engine compartment is narrow, making crankcase breather replacement inconvenient. The top surface of the cylinder is the engine cover, and when the cover is opened, there is more working space above the top surface of the cylinder.
[0029] It should be understood that the vertical direction described in the embodiments of this application refers to the direction from the cylinder block toward the oil pan, with the crankshaft flywheel and wheel belt system located on opposite left and right sides of the engine. In a common excavator engine mounting structure, brackets are installed on either side of the crankshaft flywheel housing and wheel belt system, securing them within the engine compartment. The top surface of the engine compartment is the bonnet, with the top surface of the engine cylinder facing the bonnet. Therefore, after opening the bonnet, the components in the top area of the engine cylinder block can be directly observed.
[0030] In order to facilitate the replacement of the crankcase breather, the embodiment of the present application provides a crankcase breather, such as Figure 1 As shown, the crankcase breather includes: an oil filter 10, an oil return pipe 11, an exhaust gas discharge pipe 12 and an exhaust gas intake pipe 13.
[0031] Specifically, one end of the oil return pipe 11, the exhaust gas discharge pipe 12 and the exhaust gas intake pipe 13 are respectively connected to the oil filter 10, the other end of the oil return pipe 11 is connected to the oil pan, the other end of the exhaust gas discharge pipe 12 is connected to the external space, and the other end of the exhaust gas intake pipe 13 is connected to the crankcase through the top surface of the cylinder block.
[0032] Furthermore, the oil outlet of the oil filter 10 is arranged at the bottom, the exhaust gas outlet is arranged at the top, and the exhaust gas inlet is arranged at the side wall.
[0033] Furthermore, the exhaust gas intake pipe 13 is connected between the cylinder areas on the top surface of the cylinder body.
[0034] Furthermore, the oil return pipe 11 is arranged in a vertical direction.
[0035] The oil filter 10 of the crankcase breather shown in the embodiment of the present application is more convenient to replace. Unlike the existing crankcase breather, which is arranged near the oil pan, that is, at the bottom of the engine. In the embodiment of the present application, the two ends of the oil return pipe 11 are respectively connected to the top surface of the cylinder and the oil pan, and the resistance to oil return is smaller. The oil filter 10 is arranged at a height close to the top surface of the cylinder body. When the oil filter 10 needs to be replaced, the oil filter 10 can be directly disassembled and installed by opening the engine cover.
[0036] Secondly, exhaust gas leaking from the cylinder body is hotter and accumulates above the crankcase. The oil return pipe 11, which connects to the crankcase from the top of the cylinder body, facilitates direct entry of exhaust gas into the oil filter 10 via the exhaust intake pipe 13. The bottom of the oil filter 10 is connected to the oil return pipe 11, which extends vertically downward. The filtered oil returns to the oil pan along this downwardly extending pipe. Finally, the filtered exhaust gas is released through the exhaust discharge pipe 12.
[0037] In winter, when the engine is running at sub-zero temperatures, the exhaust gas entering the crankcase contains water vapor, which condenses into ice as it passes through the exhaust pipe 12. The ice layer gradually thickens and eventually blocks the exhaust pipe 12.
[0038] Furthermore, in order to prevent the exhaust gas discharge pipe 12 from being blocked by ice, the outer side of the pipe wall 120 of the exhaust gas discharge pipe 12 is wrapped with an insulation layer 121. The three-dimensional structure diagram of the exhaust gas exhaust pipe is as follows Figure 2 As shown, Figure 3 yes Figure 2 Preferably, the insulation layer 121 is made of plastic or other materials with low heat transfer coefficient.
[0039] Example 2
[0040] The crankcase breather in the above-mentioned embodiment 1 is one component of the engine system and can be installed in engines of different models and specifications. In order to specifically illustrate the structural characteristics of the crankcase breather, the embodiment of the present application also provides an engine, which includes the crankcase breather shown in embodiment 1.
[0041] like Figure 1 As shown, in the engine of the embodiment of the present application, two crankcase breathers are provided. Specifically, the two crankcase breathers are symmetrically arranged on the top surface of the cylinder body.
[0042] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.
Claims
1. A crankcase breather, characterized in that: include: An oil filter (10), an oil return pipe (11), an exhaust gas discharge pipe (12), and an exhaust gas intake pipe (13); One end of the oil return pipe (11), the exhaust gas discharge pipe (12) and the exhaust gas intake pipe (13) are respectively connected to the oil filter (10), the other end of the oil return pipe (11) is connected to the oil pan on the bottom surface of the cylinder body, the other end of the exhaust gas discharge pipe (12) is connected to the external space, and the other end of the exhaust gas intake pipe (13) is connected to the crankcase on the top surface of the cylinder body; The oil filter (10) is arranged on the top surface of the cylinder body.
2. A crankcase breather according to claim 1, characterized in that: The oil outlet of the oil filter (10) is arranged at the bottom, the exhaust gas outlet is arranged at the top, and the exhaust gas inlet is arranged at the side wall.
3. A crankcase breather according to claim 1, characterized in that: The exhaust gas intake pipe (13) is connected between adjacent cylinder groups on the top surface of the cylinder body, and the cylinder group is a group of cylinders arranged in the same direction.
4. A crankcase breather according to claim 1, characterized in that: The outer side of the pipe wall (120) of the exhaust gas discharge pipe (12) is wrapped with a heat-insulating layer (121).
5. The crankcase breather according to claim 1, characterized in that: The oil return pipe (11) is arranged in a vertical direction.
6. An engine, characterized in that: A crankcase breather comprising the crankcase breather according to any one of claims 1 to 5.
7. An engine according to claim 6, characterized in that: There are two crankcase breathers.
8. An engine according to claim 7, characterized in that: The two crankcase breathers are arranged on the top surface of the cylinder block at both ends along the axial direction of the crankshaft.