Crankcase ventilation system, engine and vehicle

Abstract

The utility model provides a crankcase ventilation system, an engine and a vehicle, and relates to the field of crankcase ventilation systems. An adjusting assembly is arranged at the air outlet end of the crankcase and specifically comprises a vacuum pump and a pressure sensor arranged in the crankcase, and electromagnetic bypass valves in communication connection or electric connection with the pressure sensor are arranged at the two ends of the vacuum pump in parallel. Thus, the pressure value in the crankcase can be monitored in real time through the pressure sensor, when the measured pressure value does not conform to the preset pressure range, the opening degree of the electromagnetic bypass valve can be correspondingly adjusted, and the working state of the adjusting assembly can be correspondingly changed; therefore, the pressure of the crankcase can be correspondingly adjusted to rise or fall to a preset range through the adjusting assembly. In this way, the pressure value in the crankcase can be adjusted in real time without a complex structure, and it is ensured that the crankcase can maintain the stable negative pressure state under all working conditions.

Description

Technical Field

[0001] This application relates to the field of crankcase ventilation systems, and more particularly to a crankcase ventilation system, engine, and vehicle. Background Technology

[0002] The crankcase is one of the most important components of a car engine. Therefore, the crankcase ventilation system is crucial for the normal operation of the engine, helping to prevent the accumulation of sludge and other harmful components, reducing engine malfunctions and wear. Ideally, the crankcase should be under negative pressure to prevent oil leakage and keep it clean. However, when the engine operates under different conditions, due to the reciprocating motion of the piston and the rotation of the connecting rod, positive pressure may occur in the crankcase ventilation system. This means that existing crankcase ventilation systems have unstable negative pressure control, which can lead to exhaust gases and other pollutants entering the atmosphere. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a crankcase ventilation system, engine and vehicle to solve the problem of unstable negative pressure control in existing crankcase ventilation systems.

[0004] In accordance with the above objectives, a crankcase ventilation system is provided according to a first aspect of the present invention, wherein the crankcase ventilation system comprises:

[0005] Intake module;

[0006] The crankcase is connected to the intake module. An adjustment component is provided at the outlet end of the crankcase. The adjustment component includes a vacuum pump and a pressure sensor installed in the crankcase. Electromagnetic bypass valves that are communicatively or electrically connected to the pressure sensor are connected in parallel at both ends of the vacuum pump.

[0007] The pressure sensor can adjust the opening of the electromagnetic bypass valve according to the pressure value in the crankcase, thereby adjusting the working state of the regulating component, which can correspondingly adjust the pressure in the crankcase.

[0008] Preferably, the intake module includes an air filter, an intake pipe, a turbocharger, an intercooler, and an intake manifold connected in sequence.

[0009] Preferably, the intake manifold is connected to the intake end of the crankcase.

[0010] Preferably, the air outlet of the crankcase is connected to the air intake module via an air outlet pipe.

[0011] Preferably, the exhaust pipe includes a first exhaust pipe, a second exhaust pipe, and a third exhaust pipe; the inlet end of the first exhaust pipe is connected to the exhaust end of the crankcase; the inlet ends of the second exhaust pipe and the third exhaust pipe are both connected to the exhaust end of the first exhaust pipe; the exhaust end of the second exhaust pipe is connected to the inlet pipe, and the exhaust end of the third exhaust pipe is connected to the pipe between the intercooler and the intake manifold.

[0012] Preferably, the regulating component is located at the first outlet pipe; the regulating component includes an oil-gas separator, a PCV diaphragm valve and the vacuum pump arranged in sequence, and the vacuum pump is driven by a camshaft.

[0013] Preferably, a fourth outlet pipe is connected in parallel at both ends of the vacuum pump, and the electromagnetic bypass valve is located at the fourth outlet pipe;

[0014] When the pressure sensor detects that the pressure in the crankcase is higher than the preset pressure range, the electromagnetic bypass valve gradually closes so that the vacuum pump can evacuate the crankcase.

[0015] When the pressure sensor detects that the pressure in the crankcase is lower than the preset pressure range, the electromagnetic bypass valve gradually opens to allow the vacuum pump to run idle, and the PCV diaphragm valve can balance the pressure in the crankcase.

[0016] Preferably, a first check valve and a second check valve are respectively provided at the second air outlet pipe and the third air outlet pipe.

[0017] According to a second aspect of the present invention, an engine is provided, wherein the engine includes a crankcase ventilation system as described above.

[0018] According to a third aspect of the present invention, a vehicle is provided, wherein the vehicle includes the engine described above.

[0019] According to the crankcase ventilation system, engine, and vehicle of this utility model, an adjustment component is installed at the outlet end of the crankcase. Specifically, this component includes a vacuum pump and a pressure sensor installed in the crankcase. The ventilation system has electromagnetic bypass valves connected in parallel across the vacuum pump, which are either communicatively or electrically connected to the pressure sensor. Thus, the pressure sensor can monitor the pressure value inside the crankcase in real time. When the measured pressure value does not meet the preset pressure range, the opening of the electromagnetic bypass valve can be adjusted accordingly, and the working state of the adjustment component can be changed accordingly. Therefore, the adjustment component can adjust the crankcase pressure to rise or fall within the preset range.

[0020] In this way, the pressure value inside the crankcase can be adjusted in real time without a complicated structure, so as to ensure that the crankcase can maintain a stable negative pressure state under all operating conditions.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the crankcase ventilation system according to an embodiment of the present invention.

[0024] Icons: 10-Air filter; 11-Intake pipe; 12-Turbocharger; 13-Intercooler; 14-Intake manifold; 20-Crankcase; 21-Oil-gas separator; 22-PCV diaphragm valve; 23-Vacuum pump; 24-Solenoid bypass valve; 30-First outlet pipe; 31-Second outlet pipe; 32-Third outlet pipe; 33-Fourth outlet pipe; 40-First check valve; 41-Second check valve. Detailed Implementation

[0025] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0027] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0028] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0029] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0030] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0031] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0032] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0033] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0034] According to a first aspect of this utility model, a crankcase ventilation system is provided, such as... Figure 1 As shown, this ventilation system includes an intake module and a crankcase 20 connected to the intake module. The crankcase 20's outlet end is equipped with an adjustment component and an electromagnetic bypass valve 24. Through the cooperation of the adjustment component and the electromagnetic bypass valve 24, the crankcase 20 can be ensured to maintain a stable negative pressure state under all operating conditions. The specific structure and connection relationships of the above-mentioned parts of the crankcase ventilation system according to this utility model will be described in detail below.

[0035] like Figure 1 As shown, the intake module in this embodiment includes an air filter 10, an intake pipe 11, a turbocharger 12, an intercooler 13, and an intake manifold 14 connected in sequence. The intake manifold 14 is connected to the intake end of the crankcase 20, thus allowing purified gas to be introduced into the ventilation system. It should be noted that the intake module and the crankcase 20 are both common knowledge in the art, therefore their specific structures, condensation methods, and operating principles will not be described in detail. Similarly, although not shown, the crankcase 20 is also connected to an exhaust module, which is also prior art and will not be described in detail.

[0036] Furthermore, the outlet end of the crankcase 20 is connected to the aforementioned intake module via an outlet pipe, such as... Figure 1As shown, the exhaust pipe includes a first exhaust pipe 30, a second exhaust pipe 31, and a third exhaust pipe 32. The intake end of the first exhaust pipe 30 is connected to the exhaust end of the crankcase 20. The intake ends of the second exhaust pipe 31 and the third exhaust pipe 32 are both connected to the exhaust end of the first exhaust pipe 30. The exhaust end of the second exhaust pipe 31 is connected to the intake pipe 11, and the exhaust end of the third exhaust pipe 32 is connected to the pipe between the intercooler 13 and the intake manifold 14.

[0037] Furthermore, the regulating component is located at the first exhaust pipe 30. The regulating component includes an oil-gas separator 21, a PCV diaphragm valve 22, and a vacuum pump 23 arranged in sequence (in this embodiment, the vacuum pump 23 is driven by the camshaft). The oil-gas separator 21 is located at one end of the first exhaust pipe 30 near the crankcase 20 (i.e., the intake end of the first exhaust pipe 30). In addition, the regulating component also includes a pressure sensor installed in the crankcase 20, which can detect the pressure value inside the crankcase 20 in real time.

[0038] In addition, a first check valve 40 and a second check valve 41 are respectively installed at the second exhaust pipe 31 and the third exhaust pipe 32. Thus, the aforementioned regulating components can reintroduce blow-by gases from the crankcase 20 into the combustion chamber. Specifically, the oil-gas separator 21 has two exhaust paths, namely the second exhaust pipe 31 and the third exhaust pipe 32. When the pressure in the intake pipe 11 is greater than the pressure in the crankcase 20, the first check valve 40 is closed, and the second check valve 41 is open; correspondingly, when the intake end pressure in the intake manifold 14 is greater than the pressure in the crankcase 20, the second check valve 41 is closed, and the first check valve 40 is open. This ensures smooth and efficient exhaust.

[0039] In this embodiment, as Figure 1 As shown, a fourth outlet pipe 33 is connected in parallel to both ends of the vacuum pump 23. This fourth outlet pipe 33 is equipped with an electromagnetic bypass valve 24, which is communicatively or electrically connected to the pressure sensor located within the crankcase 20. Thus, when the pressure sensor detects that the pressure in the crankcase 20 is higher than a preset pressure range, it can gradually close the electromagnetic bypass valve 24, allowing the vacuum pump 23 to evacuate the crankcase 20 and reduce the pressure within it. When the pressure sensor detects that the pressure in the crankcase 20 is lower than the preset pressure range, it can gradually open the electromagnetic bypass valve 24, allowing the vacuum pump 23 to idle, meaning it no longer evacuates the crankcase 20. At this time, the PCV diaphragm valve 22 adjusts the flow distribution (an inherent function of the PCV diaphragm valve 22) to balance the pressure within the crankcase 20.

[0040] It should be noted that, as Figure 1As shown, each pipeline can achieve stable connection by using a tee.

[0041] According to the crankcase ventilation system described above, an adjustment component is provided at the outlet end of the crankcase 20. Specifically, this component includes a vacuum pump 23 and a pressure sensor installed in the crankcase 20. An electromagnetic bypass valve 24, which is communicatively or electrically connected to the pressure sensor, is connected in parallel across the vacuum pump 23. Thus, the pressure sensor can monitor the pressure value inside the crankcase 20 in real time. When the measured pressure value does not meet the preset pressure range, the opening of the electromagnetic bypass valve 24 can be adjusted accordingly, and the working state of the adjustment component can be changed accordingly. Therefore, the pressure in the crankcase 20 can be adjusted to rise or fall within the preset range through this adjustment component.

[0042] In this way, the pressure value inside the crankcase 20 can be adjusted in real time without a complex structure, ensuring that the crankcase 20 can maintain a stable negative pressure state under all operating conditions. This ventilation system has a compact and simple structure, reducing unnecessary piping and components, effectively reducing costs and the probability of failure.

[0043] According to a second aspect of the present invention, an engine is provided, the engine including the crankcase 20 ventilation system as described above.

[0044] According to a third aspect of the present invention, a vehicle is provided, the vehicle comprising the engine described above.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A crankcase ventilation system, characterized in that, The crankcase ventilation system includes: Intake module; The crankcase is connected to the intake module. An adjustment component is provided at the outlet end of the crankcase. The adjustment component includes a vacuum pump and a pressure sensor installed in the crankcase. Electromagnetic bypass valves that are communicatively or electrically connected to the pressure sensor are connected in parallel at both ends of the vacuum pump. The pressure sensor can adjust the opening of the electromagnetic bypass valve according to the pressure value in the crankcase, thereby adjusting the working state of the regulating component, which can correspondingly adjust the pressure in the crankcase.

2. The crankcase ventilation system according to claim 1, characterized in that, The intake module includes an air filter, intake pipe, turbocharger, intercooler, and intake manifold connected in sequence.

3. The crankcase ventilation system according to claim 2, characterized in that, The intake manifold is connected to the intake end of the crankcase.

4. The crankcase ventilation system according to claim 2, characterized in that, The crankcase's outlet is connected to the intake module via an outlet pipe.

5. The crankcase ventilation system according to claim 4, characterized in that, The exhaust pipe includes a first exhaust pipe, a second exhaust pipe, and a third exhaust pipe; the intake end of the first exhaust pipe is connected to the exhaust end of the crankcase; the intake ends of the second exhaust pipe and the third exhaust pipe are both connected to the exhaust end of the first exhaust pipe; the exhaust end of the second exhaust pipe is connected to the intake pipe, and the exhaust end of the third exhaust pipe is connected to the pipe between the intercooler and the intake manifold.

6. The crankcase ventilation system according to claim 5, characterized in that, The regulating component is located at the first outlet pipe; the regulating component includes an oil-gas separator, a PCV diaphragm valve and the vacuum pump arranged in sequence, and the vacuum pump is driven by a camshaft.

7. The crankcase ventilation system according to claim 6, characterized in that, The vacuum pump has a fourth outlet pipe connected in parallel at both ends, and the electromagnetic bypass valve is located at the fourth outlet pipe. When the pressure sensor detects that the pressure in the crankcase is higher than the preset pressure range, the electromagnetic bypass valve gradually closes so that the vacuum pump can evacuate the crankcase. When the pressure sensor detects that the pressure in the crankcase is lower than the preset pressure range, the electromagnetic bypass valve gradually opens to allow the vacuum pump to idle, and the PCV diaphragm valve can balance the pressure in the crankcase.

8. The crankcase ventilation system according to claim 5, characterized in that, A first check valve and a second check valve are respectively installed at the second vent pipe and the third vent pipe.

9. An engine, characterized in that, The engine includes a crankcase ventilation system as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes the engine as described in claim 9.

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