Crankcase ventilation system

Abstract

The utility model discloses a crankcase ventilation system which comprises an oil-gas separator, an oil return channel, an oil return pipe and a gas outlet pipe. The oil-gas separator is arranged on the top of the engine; the oil return channel is formed in an engine body of the engine, one end of the oil return channel is connected with an oil pan, and the other end of the oil return channel extends out of the top of the engine body. One end of the oil return pipe is connected with the other end of the oil return channel, and the other end of the oil return pipe is connected with an oil outlet of the oil-gas separator; and one end of the gas outlet pipe is connected with a gas outlet of the oil-gas separator, and the other end of the gas outlet pipe is connected with a gas inlet of the supercharger. Therefore, the crankcase ventilation system is simple and reasonable in structure, the arrangement difficulty is reduced, and the risk of interference with other systems and the risk of freezing in winter are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a crankcase ventilation system. Background Art

[0002] In the existing engine structure layout, since the crankcase ventilation system is arranged on the top of the engine, the main function of the crankcase ventilation system is to seal the engine, isolate the engine from the external environment, separate the oil and gas mixture discharged by the engine, and recycle it. The separated gas is guided to the engine intake end through a pipeline and re-enters the engine to participate in the circulation. The separated oil returns to the engine oil pan through the oil return pipeline.

[0003] like Figure 1 As shown, since the top of the engine 2 is far away from the oil pan, the return oil pipe 4 of the crankcase ventilation system is relatively long. The conventional arrangement is 400 mm, which has the risk of interference during the arrangement process. At the same time, the excessive length of the return oil pipe 4 may also lead to the risk of freezing in winter.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a crankcase ventilation system with a simple and reasonable structure, which reduces the difficulty of layout, the risk of interference with other systems and the risk of freezing in winter.

[0006] To achieve the above-mentioned purpose, the utility model provides a crankcase ventilation system, including: an oil-gas separator, an oil return channel, an oil return pipe and an air outlet pipe. The oil-gas separator is arranged on the top of the engine; the oil return channel is opened in the engine body, one end of the oil return channel is connected to the oil pan, and the other end of the oil return channel extends out of the top of the engine body; one end of the oil return pipe is connected to the other end of the oil return channel, and the other end of the oil return pipe is connected to the oil outlet of the oil-gas separator; and one end of the air outlet pipe is connected to the air outlet of the oil-gas separator, and the other end of the air outlet pipe is connected to the air inlet of the supercharger.

[0007] In one embodiment of the utility model, the crankcase ventilation system further comprises an air intake pipe, one end of the air intake pipe is connected to the exhaust port of the engine, and the other end of the air intake pipe is connected to the air intake port of the oil-gas separator.

[0008] In one embodiment of the utility model, the crankcase ventilation system further comprises an air intake pipe, one end of which is connected to an external air supply device, and the other end of which is connected to an air intake port of the oil-gas separator.

[0009] In one embodiment of the present invention, a portion of the air intake pipe is a rubber pipe, and another portion of the air intake pipe is a metal pipe.

[0010] In one embodiment of the present utility model, the crankcase ventilation system further includes a one-way valve, and the one end of the oil return pipe is connected to the other end of the oil return channel through the one-way valve.

[0011] In one embodiment of the present invention, the one-way valve comprises: a ball, an upper one-way valve body and a lower one-way valve body, the upper one-way valve body and the lower one-way valve body are connected by threads, and the ball is located between the upper one-way valve body and the lower one-way valve body.

[0012] In one embodiment of the present utility model, the one-way valve further comprises a sealing ring, and the sealing ring is sleeved between the one-way valve upper body and the one-way valve lower body.

[0013] In one embodiment of the present utility model, the bottom of the one-way valve lower body is connected to the oil return channel through a thread, and the top of the one-way valve upper body is connected to the oil return pipe through a clamp.

[0014] In one embodiment of the present utility model, a plurality of small holes are formed on the lower body of the one-way valve.

[0015] In one embodiment of the present invention, the length of the oil return pipe is 100 mm.

[0016] Compared with the prior art, the crankcase ventilation system according to the utility model has a simple and reasonable structure, reduces the difficulty of layout, reduces the risk of interference with other systems and the risk of freezing in winter, and at the same time, the one-way valve can also prevent the oil from flowing back. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing crankcase ventilation system;

[0018] Figure 2 is a structural schematic diagram of a crankcase ventilation system according to an embodiment of the utility model;

[0019] Figure 3 It is a schematic structural diagram of a one-way valve of a crankcase ventilation system according to an embodiment of the utility model.

[0020] Description of main reference numerals:

[0021] 1-oil-gas separator, 2-engine, 3-oil return channel, 4-oil return pipe, 5-air outlet pipe, 6-air inlet pipe, 7-air intake pipe, 8-check valve, 81-ball, 82-check valve upper body, 83-check valve lower body, 84-sealing ring. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0023] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0024] Figure 2 is a structural schematic diagram of a crankcase ventilation system according to an embodiment of the utility model; Figure 3 Schematic diagram of the structure of the one-way valve 8 of the crankcase ventilation system according to one embodiment of the present utility model. Figures 2 to 3 As shown, a crankcase ventilation system according to a preferred embodiment of the utility model comprises: an oil-gas separator 1, an oil return passage 3, an oil return pipe 4 and an air outlet pipe 5. The oil-gas separator 1 is arranged on the top of the engine 2; the oil return passage 3 is opened in the body of the engine 2, one end of the oil return passage 3 is connected to the oil pan, and the other end of the oil return passage 3 extends out of the top of the body; one end of the oil return pipe 4 is connected to the other end of the oil return passage 3, and the other end of the oil return pipe 4 is connected to the oil outlet of the oil-gas separator 1; and one end of the air outlet pipe 5 is connected to the air outlet of the oil-gas separator 1, and the other end of the air outlet pipe 5 is connected to the air inlet of the supercharger.

[0025] In one embodiment of the present invention, the crankcase ventilation system further includes an intake pipe 6 , one end of which is connected to the exhaust port of the engine 2 , and the other end of which is connected to the intake port of the oil-gas separator 1 .

[0026] In one embodiment of the present invention, the crankcase ventilation system further comprises an air intake pipe 7 , one end of which is connected to an external air supply device, and the other end of which is connected to an air intake port of the oil-gas separator 1 .

[0027] In one embodiment of the present invention, a portion of the air intake pipe 6 is a rubber pipe, and another portion of the air intake pipe is a metal pipe.

[0028] In one embodiment of the present invention, the crankcase ventilation system further includes a one-way valve 8 , and the one end of the oil return pipe 4 is connected to the other end of the oil return channel 3 via the one-way valve 8 .

[0029] In one embodiment of the present utility model, the one-way valve 8 includes: a ball 81, a one-way valve upper body 82 and a one-way valve lower body 83, the one-way valve upper body 82 and the one-way valve lower body 83 are connected by threads, and the ball 81 is located between the one-way valve upper body 82 and the one-way valve lower body 83.

[0030] In one embodiment of the present invention, the one-way valve 8 further includes a sealing ring 84 , and the sealing ring 84 is sleeved between the one-way valve upper body 82 and the one-way valve lower body 83 .

[0031] In one embodiment of the present invention, the bottom of the one-way valve lower body 83 is connected to the oil return channel 3 via threads, and the top of the one-way valve upper body 82 is connected to the oil return pipe 4 via a clamp.

[0032] In one embodiment of the present invention, a plurality of small holes are formed on the one-way valve lower body 83 .

[0033] In one embodiment of the present invention, the length of the oil return pipe 4 is 100 mm.

[0034] In practical applications, the crankcase ventilation system of the utility model mainly comprises an oil return pipe 4 and a one-way valve 8. Compared with the existing crankcase ventilation system, the oil return pipe 4 is greatly shortened to only 100 mm, which reduces the difficulty of layout. When the fluid in the oil-gas separator 1 flows to the oil return channel 3 (flows to the oil pan) through the oil return pipe 4, the ball 81 is located in the volume cavity formed by the one-way valve upper body 82 and the one-way valve lower body 83. When the fluid flows in from the one-way valve upper body 82, it will flow out from the multiple small holes on the one-way valve lower body 83 and flow into the oil return channel 3. When the fluid enters from the one-way valve lower body 83, the ball 81 will float up and seal the one-way valve upper body 82 to prevent the fluid from flowing back.

[0035] In summary, the crankcase ventilation system of the utility model has a simple and reasonable structure, reduces the difficulty of layout, reduces the risk of interference with other systems and the risk of freezing in winter, and at the same time, the one-way valve can also prevent the oil from flowing back.

[0036] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A crankcase ventilation system, characterized in that: include: An oil-gas separator is arranged on the top of the engine; An oil return passage is provided in the engine body, one end of the oil return passage is connected to the oil pan, and the other end of the oil return passage extends out of the top of the engine body; An oil return pipe, one end of which is connected to the other end of the oil return passage, and the other end of which is connected to the oil outlet of the oil-gas separator; as well as An air outlet pipe, one end of which is connected to the air outlet of the oil-gas separator, and the other end of which is connected to the air inlet of the supercharger.

2. The crankcase ventilation system according to claim 1, characterized in that It also includes an air intake pipe, one end of which is connected to the exhaust port of the engine, and the other end of which is connected to the air intake port of the oil-gas separator.

3. The crankcase ventilation system according to claim 1, characterized in that It also includes an air intake pipe, one end of which is connected to an external air supply device, and the other end of which is connected to the air intake port of the oil-gas separator.

4. The crankcase ventilation system according to claim 2, characterized in that A part of the pipe body of the air intake pipe is a rubber pipe, and another part of the pipe body is a metal pipe.

5. The crankcase ventilation system of claim 1, wherein: It also includes a one-way valve, and the one end of the oil return pipe is connected to the other end of the oil return channel through the one-way valve.

6. The crankcase ventilation system according to claim 5, characterized in that The one-way valve comprises: a ball, an upper one-way valve body and a lower one-way valve body, wherein the upper one-way valve body and the lower one-way valve body are connected via threads, and the ball is located between the upper one-way valve body and the lower one-way valve body.

7. The crankcase ventilation system according to claim 6, characterized in that The one-way valve further comprises a sealing ring, and the sealing ring is sleeved between the one-way valve upper body and the one-way valve lower body.

8. The crankcase ventilation system of claim 7, wherein: The bottom of the one-way valve lower body is connected to the oil return channel through a thread, and the top of the one-way valve upper body is connected to the oil return pipe through a clamp.

9. The crankcase ventilation system of claim 8, wherein: A plurality of small holes are provided on the lower body of the one-way valve.

10. The crankcase ventilation system of claim 1, wherein: The length of the oil return pipe is 100 mm.

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