Engine and vehicle
By installing a one-way valve between the oil-gas separator and the compressor intake pipe of the turbocharger, the problem of high-pressure gas entering the crankcase when the surge valve is activated is solved, achieving one-way gas flow and reducing costs.
Patent Information
- Application Number
- CN202520105836.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In a closed-cycle engine, when the surge valve activates, the high-pressure gas before the throttle valve enters the turbocharger compressor intake manifold through the oil-gas separator, causing positive pressure to be generated in the crankcase.
A one-way valve is installed between the oil-gas separator and the compressor intake pipe of the turbocharger to allow gas to flow in one direction and prevent reverse flow, ensuring that gas enters the compressor intake pipe and does not enter the crankcase.
This prevents high-pressure gas from entering the crankcase when the surge valve operates, avoids positive pressure in the crankcase, simplifies the gas discharge path, and reduces costs.
Smart Images
Figure CN223562890U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vehicle technical field, especially a kind of engine and vehicle. BACKGROUND
[0002] In closed cycle engine, engine crankcase is closed ventilation, that is, the gas generated after the oil-gas separator separates oil is returned to the engine through pipeline. Surge valve is a valve opened by pressure difference, installed in front of throttle. When the pressure in front of throttle rises, the difference between the pressure in front of throttle and the pressure behind throttle exceeds the threshold, surge valve will open, and the high-pressure gas in front of throttle is guided into the intake pipeline of supercharger compressor through surge valve connection pipe. This part of high-pressure gas will make the air pressure in the intake pipeline of supercharger compressor become positive pressure (that is, the absolute pressure of gas is greater than local atmospheric pressure). Since the oil-gas separator connects the crankcase of engine and the intake pipeline of supercharger compressor, the fluid in the intake pipeline of supercharger compressor will cause positive pressure in the crankcase through the pipeline of oil-gas separator. SUMMARY
[0003] The utility model provides a kind of engine and vehicle, for improving closed cycle engine, when surge valve acts, the high-pressure gas in front of throttle is guided into the intake pipeline of supercharger compressor, so that the positive pressure in the crankcase is generated.
[0004] To achieve the above purpose, the utility model provides the following technical scheme:
[0005] An engine includes a body, an oil-gas separator and a supercharger, wherein the supercharger includes a turbine and a compressor, the fluid inlet of the oil-gas separator is communicated with the crankcase of the body, and the gas outlet of the oil-gas separator is communicated with the intake pipe of the compressor through a first pipeline; a one-way valve is arranged in the first pipeline, and the gas separated by the oil-gas separator can enter the intake pipe of the compressor through the one-way valve and the first pipeline.
[0006] Optionally, the first pipeline includes a first sub-pipeline and a second sub-pipeline arranged in sequence along the arrangement direction of the oil-gas separator and the first pipeline, the first sub-pipeline and the second sub-pipeline are detachably fixedly connected, and the one-way valve is arranged at the connection position of the first sub-pipeline and the second sub-pipeline.
[0007] Optionally, the one-way valve includes a valve seat and a valve plate assembly, the valve seat is annular, the valve seat is fixed at the connection position of the first sub-pipeline and the second sub-pipeline, and the valve plate assembly is arranged in the valve seat.
[0008] Optionally, an inner wall of one end of the first sub-pipe towards the second sub-pipe is formed with a first recess, the second sub-pipe is inserted into the first sub-pipe, and the second sub-pipe is detachably and fixedly connected with the first sub-pipe.
[0009] Optionally, there is a gap between an end surface of one end of the second sub-pipe for connecting with the first sub-pipe and a bottom surface of the first recess, and the valve seat is clamped in the gap.
[0010] Optionally, an inner wall of one end of the second sub-pipe towards the first sub-pipe is formed with a second recess, the first sub-pipe is inserted into the second sub-pipe, and the second sub-pipe is detachably and fixedly connected with the first sub-pipe.
[0011] Optionally, there is a gap between an end surface of one end of the second sub-pipe for connecting with the first sub-pipe and a bottom surface of the second recess, and the valve seat is clamped in the gap.
[0012] Optionally, the valve piece assembly comprises a rotating shaft and two valve pieces, the rotating shaft is rotationally arranged in the valve seat, and the two valve pieces are arranged on two sides of the rotating shaft and are rotationally connected with the rotating shaft.
[0013] An inner wall of the valve seat is formed with a limiting protrusion, the limiting protrusion is located on one side of the two valve pieces towards the crankcase, and the limiting protrusion is used for limiting the two valve pieces so that the two valve pieces can only rotate in a direction away from the limiting protrusion.
[0014] Optionally, the second sub-pipe is threadedly connected, buckled or interference-fitted with the first sub-pipe.
[0015] The utility model also provides a vehicle, the vehicle comprises the engine provided in the above technical scheme.
[0016] In the engine and the vehicle, the gas separated by the oil-gas separator can enter the inlet pipe of the compressor through the one-way valve and the first pipe, and the fluid in the inlet pipe of the compressor cannot enter the oil-gas separator through the one-way valve, and cannot enter the crankcase of the engine. Therefore, the engine provided in the embodiment can avoid that the high-pressure gas before the throttle valve enters the inlet pipe of the compressor and enters the crankcase when the surge valve acts, and further avoid that the positive pressure is generated in the crankcase. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 Fig. 1 is a structural schematic view of an engine provided in the embodiment of the utility model;
[0018] Figure 2 Fig. 2 is a partial sectional view of the engine provided in the embodiment of the utility model;
[0019] Figure 3 For Figure 2 the structure diagram of the valve assembly in the engine shown in the figure;
[0020] Figure 4 For Figure 3 the A-A sectional view.
[0021] Figure: 1 - body; 2 - oil gas separator; 3 - supercharger; 31 - turbine; 32 - compressor; 4 - first pipeline; 41 - first sub-pipeline; 42 - second sub-pipeline; 5 - one-way valve; 51 - valve seat; 511 - limit protrusion; 52 - valve piece assembly; 521 - rotating shaft; 522 - valve piece; 6 - surge valve. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0023] Figure 1 A structure diagram of an engine provided in the present embodiment is shown in the figure, and a structure diagram of an engine provided in the present embodiment is shown in the figure. Figure 1 The engine provided in the present embodiment includes a body 1, an oil gas separator 2 and a supercharger 3. It is not difficult to understand that the supercharger 3 includes a turbine 31 and a compressor 32. Further, the fluid inlet of the oil gas separator 2 is in communication with the crankcase of the body 1, and the gas outlet of the oil gas separator 2 is in communication with the inlet pipe of the compressor 32 through a first pipeline 4. A one-way valve 5 is arranged in the first pipeline 4, and the gas separated by the oil gas separator 2 can enter the inlet pipe of the compressor 32 through the one-way valve 5 and the first pipeline 4. The one-way valve 5 only allows fluid flowing in a certain specific direction to pass through, but does not allow fluid flowing in the opposite direction to pass through. That is, in the present embodiment, the gas separated by the oil gas separator 2 can enter the inlet pipe of the compressor 32 through the one-way valve 5 and the first pipeline 4, and the fluid in the inlet pipe of the compressor 32 cannot enter the oil gas separator 2 through the one-way valve 5, nor can it enter the crankcase of the engine. Therefore, the engine provided in the present embodiment can avoid the high-pressure gas before the throttle valve entering the inlet pipe of the compressor 32 and entering the crankcase when the surge valve 6 is actuated, thereby avoiding causing positive pressure in the crankcase.
[0024] The present scheme does not affect the normal discharge of gas from the oil gas separator 2 into the inlet pipe of the compressor 32, at the same time, the inlet pipe of the compressor 32 can be designed compactly, and there is no requirement for the structure of the inlet pipe of the compressor 32, so there is no need to consider the influence of the structural specificity of the inlet pipe of the compressor 32 on the cost.
[0025] In a possible implementation, as shown in Figure 2 The first pipeline 4 includes a first sub-pipeline 41 and a second sub-pipeline 42 arranged in sequence along the arrangement direction of the oil-gas separator 2 and the first pipeline 4, the first sub-pipeline 41 and the second sub-pipeline 42 are detachably fixedly connected, and the one-way valve 5 is arranged at the connection position of the first sub-pipeline 41 and the second sub-pipeline 42. In this scheme, the connection between the first sub-pipeline 41 and the second sub-pipeline 42 is detachable, facilitating the installation and maintenance of the one-way valve 5. Exemplarily, the second sub-pipeline 42 is threadedly connected, snap-connected or interference-fitted with the first sub-pipeline 41.
[0026] Please continue to refer to Figure 2 In a specific implementation, the one-way valve 5 can include a valve seat 51 and a valve plate assembly 52, the valve seat 51 is annular, the valve seat 51 is fixed at the connection position of the first sub-pipeline 41 and the second sub-pipeline 42, and the valve plate assembly 52 is arranged at the valve seat 51.
[0027] In a possible implementation, an inner wall of one end of the first sub-pipeline 41 facing the second sub-pipeline 42 is formed with a first recess, the second sub-pipeline 42 is inserted into the first sub-pipeline 41, and the second sub-pipeline 42 is detachably fixedly connected with the first sub-pipeline 41. In this case, the valve seat 51 can be clamped at the connection position of the first sub-pipeline 41 and the second sub-pipeline 42. Exemplarily, there is a gap between the end face of the end of the second sub-pipeline 42 for connection with the first sub-pipeline 41 and the bottom face of the first recess, and the valve seat 51 is clamped in the gap.
[0028] In another possible implementation, as shown in Figure 2 An inner wall of one end of the second sub-pipeline 42 facing the first sub-pipeline 41 is formed with a second recess, the first sub-pipeline 41 is inserted into the second sub-pipeline 42, and the second sub-pipeline 42 is detachably fixedly connected with the first sub-pipeline 41. In this case, the valve seat 51 can be clamped at the connection position of the first sub-pipeline 41 and the second sub-pipeline 42. Exemplarily, there is a gap between the end face of the end of the first sub-pipeline 41 for connection with the second sub-pipeline 42 and the bottom face of the second recess, and the valve seat 51 is clamped in the gap.
[0029] In the above two schemes, the valve seat 51 is more convenient to fix in the first pipeline 4, and the structures of the components are also more simplified.
[0030] As shown in Figures 2-4As shown, when the one-way valve 5 is specifically arranged, the valve plate assembly 52 can include a rotating shaft 521 and two valve plates 522. The rotating shaft 521 is arranged in rotation in the valve seat 51, and the two valve plates 522 are arranged on both sides of the rotating shaft 521 and are in rotation with the rotating shaft 521 to achieve the opening and closing effect of the one-way valve 5. Further, a limiting protrusion 511 is formed on the inner wall of the valve seat 51, and the limiting protrusion 511 is located on the side of the two valve plates 522 facing the crankcase. The limiting protrusion 511 is used to limit the two valve plates 522, so that the two valve plates 522 can only rotate away from the limiting protrusion 511, and the gas separated by the oil-gas separator 2 can enter the inlet pipe of the compressor 32 through the one-way valve 5 and the first pipeline 4, and the fluid in the inlet pipe of the compressor 32 cannot enter the oil-gas separator 2 through the one-way valve 5. Exemplarily, the limiting protrusion 511 can be an annular boss formed on the inner wall of the valve seat 51, as shown in Figure 3 and Figure 4 as shown.
[0031] For different pipe diameters of the first pipeline 4, the one-way valve 5 can be designed in series and standardized, and at the same time, mass production can significantly reduce costs.
[0032] Other arrangements of the engine can refer to the closed cycle engine in the prior art, which will not be described here.
[0033] The vehicle provided in the embodiment includes the above-mentioned engine, in which the gas separated by the oil-gas separator 2 can enter the inlet pipe of the compressor 32 through the one-way valve 5 and the first pipeline 4, and the fluid in the inlet pipe of the compressor 32 cannot enter the oil-gas separator 2 through the one-way valve 5, nor enter the crankcase of the engine. Therefore, the engine provided in the embodiment can avoid that the high-pressure gas before the throttle valve enters the inlet pipe of the compressor 32 and enters the crankcase when the surge valve 6 is actuated, thereby avoiding the generation of positive pressure in the crankcase.
[0034] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. An engine, characterized in that, The system includes a body, an oil-gas separator, and a turbocharger. The turbocharger includes a turbine and a compressor. The fluid inlet of the oil-gas separator is connected to the crankcase of the body. The outlet of the oil-gas separator is connected to the intake pipe of the compressor through a first pipe. A one-way valve is provided in the first pipe, and the gas separated by the oil-gas separator can enter the intake pipe of the compressor through the one-way valve and the first pipe.
2. The engine according to claim 1, characterized in that, The first pipeline includes a first sub-pipeline and a second sub-pipeline arranged sequentially along the arrangement direction of the oil-gas separator and the first pipeline. The first sub-pipeline and the second sub-pipeline are detachably fixedly connected, and the one-way valve is disposed at the connection between the first sub-pipeline and the second sub-pipeline.
3. The engine according to claim 2, characterized in that, The one-way valve includes a valve seat and a valve plate assembly. The valve seat is annular and is fixed at the connection between the first sub-pipe and the second sub-pipe. The valve plate assembly is disposed on the valve seat.
4. The engine according to claim 3, characterized in that, The inner wall of the end of the first sub-pipe facing the second sub-pipe has a first recess, the second sub-pipe is inserted into the first sub-pipe, and the second sub-pipe is detachably and fixedly connected to the first sub-pipe.
5. The engine according to claim 4, characterized in that, There is a gap between the end face of the second sub-pipe used to connect with the first sub-pipe and the bottom face of the first recess, and the valve seat is engaged in the gap.
6. The engine according to claim 3, characterized in that, The inner wall of the second sub-pipe facing the first sub-pipe has a second recess, the first sub-pipe is inserted into the second sub-pipe, and the second sub-pipe is detachably and fixedly connected to the first sub-pipe.
7. The engine according to claim 6, characterized in that, There is a gap between the end face of the first sub-pipe used to connect to the second sub-pipe and the bottom surface of the second recess, and the valve seat is engaged in the gap.
8. The engine according to any one of claims 3-7, characterized in that, The valve plate assembly includes a rotating shaft and two valve plates. The rotating shaft is rotatably mounted on the valve seat, and the two valve plates are respectively disposed on both sides of the rotating shaft and are rotatably connected to the rotating shaft. The valve seat inner wall has a limiting protrusion, which is located on the side of the two valve plates facing the crankcase; the limiting protrusion is used to limit the two valve plates so that the two valve plates can only rotate in a direction away from the limiting protrusion.
9. The engine according to any one of claims 4-7, characterized in that, The second sub-pipe is connected to the first sub-pipe by thread, snap-fit, or interference fit.
10. A vehicle, characterized in that, Includes the engine as described in any one of claims 1-9.