Efficient built-in respirator
By installing an oil-gas separation labyrinth and filter device inside the engine cylinder head cover, the problem of poor oil-gas separation effect is solved, achieving more efficient oil-gas separation and reducing oil consumption, thus improving the engine's emission performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-03-27
AI Technical Summary
The oil-gas separation effect in the current technology needs to be further improved, resulting in insufficient reduction of engine oil consumption and pollutant emissions.
Design a high-efficiency built-in respirator, which includes an oil-gas separation labyrinth and a filter device. By combining the oil-gas separation labyrinth and the filter device, multiple changes in the direction of oil and gas and filtration by the filter screen can be achieved, thereby improving the oil-gas separation effect.
It improved the oil-gas separation efficiency by 60%, reduced engine oil consumption and pollutant emissions, and improved the overall exhaust gas filtration and emission performance of the engine.
Smart Images
Figure CN224049286U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to internal combustion engine, concretely relates to engine cylinder. BACKGROUND
[0002] With the engine emission upgrading of our country, people pay more and more attention to environmental protection, and, the user pays more and more attention to engine performance and its pollutant emission, therefore, engine manufacturing plant reduces oil consumption and pollution emission, installs engine cylinder cover mask breather in engine interior, to collect oil in high efficiency form, reduces pollutant, to ensure the normal operation of engine.
[0003] The patent document with the authorized announcement number CN 216554055 U discloses a diesel engine cylinder cover mask assembly. The oil gas that leaks out of the engine crankcase enters the cavity between the cylinder cover mask body and the oil gas separation plate through the oil gas inlet, and the cavity is sequentially provided with a labyrinth baffle, a baffle, a coarse separation plate and a fine separation plate. The oil gas first passes through the labyrinth baffle, then passes through the two baffles, and then passes through the coarse filter plate, and finally enters the fine filter plate, and the fine filter plate is provided with a filter screen to greatly separate and collect oil. The oil gas changes direction multiple times left and right and up and down to separate the oil particles in the oil gas, and the separated oil returns to the crankcase through the four oil return pipes at the lower end of the oil gas separation plate, and the remaining gas is discharged to the outside through the diaphragm valve and then introduced into the engine air inlet again, thereby reducing the oil consumption of the engine. SUMMARY
[0004] The utility model solves the technical problem: further improve the effect of oil gas separation.
[0005] To solve the above technical problems, the utility model provides the following technical scheme: an efficient built-in breather, including the breather main part built in the engine cylinder cover mask, the oil gas separation labyrinth and filter device arranged on the upper part of the breather main part, and the oil gas inlet and oil outlet arranged on the breather main part, according to the running direction of oil gas, the first oil outlet is arranged between the oil gas separation labyrinth and the filter device, and the second oil outlet is arranged behind the filter device.
[0006] The oil gas that leaks out of the engine crankcase enters the oil gas separation cavity formed by the breather and the engine cylinder cover mask through the oil gas inlet, passes through the oil gas separation labyrinth, and part of the oil is separated and blocked, and flows out through the first oil outlet. At the same time, part of the oil gas is sprayed out from the first oil outlet, and part of the oil gas enters the filter device. The oil gas sprayed out from the first oil outlet reenters the oil gas inlet.
[0007] The oil gas enters the filter device, and the oil is filtered out by the filter screen, and the oil flows out through the second oil outlet. At the same time, part of the oil gas is sprayed out through the second oil outlet and reenters the oil gas inlet.
[0008] The gas filtered by the filtering device is discharged from the breather pipe to the outside of the engine head cover, and the engine oil is separated and flows back to the engine oil sump.
[0009] As an alternative, the oil-gas separation labyrinth is a wavy oil-gas separation labyrinth.
[0010] As an alternative, the filtering device is a filter box fixed on the respirator body.
[0011] As an improvement, each oil outlet is matched with an oil collecting structure which is wide at the top and narrow at the bottom, and the oil outlet is arranged at the bottom end of the oil collecting structure. The oil collecting structure similar to a funnel collects the engine oil after oil-gas separation and then discharges the engine oil through the oil outlet.
[0012] As an alternative, the second oil outlet is matched with a piston valve. The piston valve controls the medium by axial displacement of the piston-shaped cylinder in the valve cavity, and can effectively cut off and connect the medium (oil gas) under the action of pressure difference.
[0013] The respirator body is fixedly installed in the engine head cover by screws and adhesion, and an oil-gas separation chamber is formed between the respirator body and the inner cavity of the engine head cover, and the oil-gas separation labyrinth and the filtering device are located in the oil-gas separation chamber.
[0014] Compared with the prior art, the high-efficiency built-in respirator improves the filtering effect by about 60%, and improves the overall exhaust gas filtering and emission effect of the engine. BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model will be further described in connection with the drawings:
[0016] Figure 1 It is a schematic view of the high-efficiency built-in respirator;
[0017] Figure 2 It is a bottom view of Figure 1 ;
[0018] Figure 3 It is a top view of Figure 1 ;
[0019] Figure 4 It is an A-A sectional view of Figure 2 ;
[0020] Figure 5 It is a schematic view of the engine head cover 50;
[0021] Figure 6 It is a top view of Figure 5 ;
[0022] Figure 7 It is a bottom view of Figure 5 ;
[0023] Figure 8 The working principle diagram of the high-efficiency built-in breather.
[0024] Explanation of symbols in the drawing:
[0025] 10. Breather body
[0026] 20. Oil-gas separation labyrinth
[0027] 30. Filtering device
[0028] 40. Oil-gas inlet; 41. First oil outlet; 42. Second oil outlet; 43. Oil collecting structure
[0029] 50. Engine cylinder cover; 51. Vent hole; 52. Screw DETAILED DESCRIPTION
[0030] In combination Figures 1 to 3 The high-efficiency built-in breather comprises a breather body 10 built in an engine cylinder cover, an oil-gas separation labyrinth 20 and a filtering device 30 arranged at the upper part of the breather body, and an oil-gas inlet 40 and oil outlets arranged on the breather body. According to the running direction of oil-gas, the first oil outlet 41 is arranged between the oil-gas separation labyrinth and the filtering device, and the second oil outlet 42 is arranged at the rear of the filtering device.
[0031] As Figure 3 The oil-gas separation labyrinth 20 is a wave-shaped oil-gas separation labyrinth.
[0032] The filtering device 30 is a filter box fixed on the breather body 10.
[0033] As Figure 2 Any oil outlet is matched with an oil collecting structure 43 which is wide at the top and narrow at the bottom, and the oil outlet is arranged at the bottom end of the oil collecting structure.
[0034] The second oil outlet 42 is matched with a piston valve.
[0035] As Figure 7 The breather body 10 is fixedly installed inside the engine cylinder cover 50 through screws and adhesion, and an oil-gas separation chamber is formed between the breather body and the inner cavity of the engine cylinder cover, and the oil-gas separation labyrinth 20 and the filtering device 30 are located in the oil-gas separation chamber.
[0036] Referring to Figure 8 The oil-gas from the engine crankcase chamber enters the oil-gas separation chamber formed by the breather and the engine cylinder cover 50 through the oil-gas inlet 40, passes through the oil-gas separation labyrinth 20, and part of the oil is separated and falls down, and flows out through the first oil outlet 41. At the same time, part of the oil-gas is sprayed out from the first oil outlet 41, and part of the oil-gas enters the filtering device 30. The oil-gas sprayed out from the first oil outlet 41 reenters the oil-gas inlet 40.
[0037] The oil gas enters the filtering device 30, and the oil is filtered by the filter screen. The oil flows out through the second oil outlet 42. At the same time, part of the oil gas is sprayed out through the second oil outlet 42 and re-enters the oil gas inlet 40.
[0038] The filtered gas is discharged from the air pipe 51 to the outside of the cylinder cover 50, and the separated oil flows back to the engine oil pan.
[0039] The first oil outlet 41 and the second oil outlet 42 are designed in a matched manner, and a funnel-shaped oil collecting structure 43 is arranged to collect the oil separated from the oil gas, and then the oil is discharged through the first oil outlet 41 / second oil outlet 42.
[0040] The above is only a preferred embodiment of the present application. For ordinary skilled in the art, according to the idea of the present application, the specific embodiment and the application range can be changed. The content of the specification should not be understood as a limitation of the present application.
Claims
1. A high efficiency built-in breather comprising a breather body (10) built in an engine head cover, an oil gas separation labyrinth (20) and a filtering device (30) arranged at the upper part of the breather body, and an oil gas inlet (40) and an oil outlet arranged on the breather body, characterized in that: A first oil outlet (41) is arranged between the oil-gas separation labyrinth and the filtering device according to the running direction of the oil gas.
2. The efficient built-in respirator of claim 1, wherein: The oil-gas separation labyrinth (20) is a wave-shaped oil-gas separation labyrinth.
3. The efficient built-in respirator of claim 1, wherein: The filtering device (30) is a filter box fixed on the respirator main body (10).
4. The efficient built-in respirator of claim 1, wherein: Each of the oil outlets is matched with an oil collecting structure (43) which is wide at the top and narrow at the bottom, and the oil outlet is arranged at the bottom end of the oil collecting structure.
5. The efficient built-in respirator of claim 1, wherein: The second oil outlet (42) is matched with a piston valve.
6. The efficient built-in respirator of claim 1, wherein: The respirator main body (10) is fixedly installed in the engine cylinder cover (50) by screws and adhesion, and an oil-gas separation cavity is formed between the respirator main body and the inner cavity of the engine cylinder cover, and the oil-gas separation labyrinth (20) and the filtering device (30) are located in the oil-gas separation cavity.