Ventilation system for crankcase, crankcase and vehicle

Abstract

The utility model discloses a ventilation system for a crank case, the crank case and a vehicle, the ventilation system for the crank case comprises a ventilation pipe, an air inlet pipe, an air outlet pipe, an air inlet pipe and an air outlet pipe, the ventilation pipe is connected with the crank case; the gas collecting device is communicated with the crankcase through the breather pipe, and the gas collecting device is suitable for being connected with a supercharger or a catalytic converter in an on-off mode; and the control unit is in communication connection with the gas collecting device, the supercharger and the catalytic converter, and the control unit is configured to control the gas collecting device to extract the mixed gas exhausted by the crankcase and control the mixed gas in the gas collecting device to selectively flow to the supercharger and the catalytic converter. According to the ventilation system for the crankcase, mixed gas exhausted from the crankcase is prevented from being condensed and frozen after being in contact with cold air, and the service life of the crankcase is prolonged.

Description

Technical Field

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

[0002] When the vehicle's engine is working, the pressure inside the crankcase fluctuates. When the pressure is positive, the crankcase needs to exhaust gas, and when the pressure is negative, the crankcase needs to inhale filtered clean gas to maintain constant pressure. When the crankcase is exhausted, the gas exhausted from the crankcase is connected to the air filter outlet pipe through the vent pipe, and the gas exhausted from the crankcase flows into the supercharger again with the filtered air to participate in the engine operation.

[0003] However, when the vehicle is running in a low-temperature environment, the temperature of the air entering the air filter outlet pipe also decreases with the external environment. The high-temperature gas discharged from the crankcase encounters the cold air in the air filter outlet pipe and condenses and freezes at the interface between the air filter outlet pipe and the air filter outlet pipe. After working for a long time, the air filter pipe will be blocked, the gas in the crankcase cannot be discharged in time, and the pressure will increase. When a certain pressure is reached, the crankcase cannot work normally, the engine oil seal leaks, and in serious cases, the engine is scrapped. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a ventilation system to prevent the mixed gas discharged from the crankcase from condensing and freezing after contacting with cold air, thereby extending the service life of the crankcase.

[0005] The second object of the present utility model is to provide a crankcase adopting the above ventilation system.

[0006] The third object of the present utility model is to provide a vehicle using the above crankcase.

[0007] According to the first aspect of the utility model, a ventilation system for a crankcase includes: a breather pipe, which is connected to the crankcase; an air collecting device, which is connected to the crankcase through the breather pipe, and is suitable for being connected to a supercharger or a catalyst in a switchable manner; a control unit, which is communicatively connected to the air collecting device, the supercharger and the catalyst respectively, and is configured to control the air collecting device to extract the mixed gas discharged from the crankcase, and to control the mixed gas in the air collecting device to selectively flow to the supercharger and the catalyst.

[0008] According to the ventilation system for the crankcase of the utility model, the flow path of the mixed gas discharged from the crankcase is changed, thereby avoiding the condensation and icing of the mixed gas at the connection between the ventilation pipe and the air filter outlet pipe, preventing the ventilation system from being blocked, and the mixed gas in the crankcase can be discharged normally, so that the crankcase and the engine can be used normally for a long time. In addition, it is also avoided that the connection between the ventilation pipe and the air filter outlet pipe is frozen and falls into the supercharger along the air filter outlet pipe to damage the components of the supercharger, so that the supercharger can be used normally for a long time, providing sufficient power for the vehicle to travel. In addition, the control logic of the control unit is simple, and it is also convenient to control the flow path of the mixed gas in the air collecting device (flowing to the supercharger or catalyst), thereby improving the performance of the ventilation system.

[0009] According to some embodiments of the utility model, the gas collecting device includes: an air collecting tank; a pump, the pump is communicatively connected to the control unit, and the pump is arranged between the air collecting tank and the ventilation pipe to extract the mixed gas exhausted from the crankcase and collect it in the air collecting tank.

[0010] According to some embodiments of the utility model, the gas collecting device further includes an on-off control assembly, which is arranged on the gas collecting tank, and the on-off control assembly includes: a main body, a plurality of on-off parts, the plurality of on-off parts are arranged in the main body, and the gas collecting tank is connected to the supercharger and the catalyst in an on-off manner through the plurality of on-off parts; an on-off part controller, which is arranged on the main body, and the on-off part controller is communicatively connected to the control unit and the plurality of on-off parts.

[0011] According to some embodiments of the utility model, the on-off control assembly further includes: a first exhaust pipe, which is arranged between one of the multiple on-off parts and the supercharger; and a second exhaust pipe, which is arranged between another one of the multiple on-off parts and the catalyst.

[0012] According to some embodiments of the utility model, the gas collecting device further includes: a gas collecting tank detection component, the gas collecting tank detection component is communicatively connected with the control unit, and the gas collecting tank detection component is arranged on the main body to detect the pressure in the gas collecting tank.

[0013] According to some embodiments of the present invention, the on-off control assembly is arranged at the bottom of the gas collecting tank.

[0014] According to some embodiments of the present invention, the switch is a one-way switch.

[0015] The crankcase according to the embodiment of the second aspect of the utility model comprises the ventilation system for the crankcase according to the embodiment of the first aspect of the utility model, and the mixed gas exhausted from the crankcase is exhausted through the ventilation system.

[0016] According to some embodiments of the present invention, a pressure detection component is provided in the crankcase, and the pressure detection component is communicatively connected to the control unit of the ventilation system.

[0017] A vehicle according to an embodiment of the third aspect of the utility model comprises a crankcase according to an embodiment of the second aspect of the utility model.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of a ventilation system according to an embodiment of the utility model;

[0021] Figure 2 is a schematic diagram of an engine according to an embodiment of the utility model;

[0022] Figure 3 is a front view of an engine according to an embodiment of the utility model;

[0023] Figure 4 yes Figure 3 The enlarged view of the A part shown in the middle circle;

[0024] Figure 5 It is a schematic diagram of the working principle of the ventilation system according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 100. Ventilation system;

[0027] 1. Ventilation pipe;

[0028] 2. Gas collecting device; 21. Gas collecting tank; 22. Pump;

[0029] 23. On / off control assembly; 231. Main body; 232. On / off controller;

[0030] 233. First exhaust pipe; 234. Second exhaust pipe; 235. Gas collecting tank detection component;

[0031] 200, crankcase;

[0032] 300, engine;

[0033] 301. Supercharger; 302. Catalyst. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1 The ventilation system 100 according to the first embodiment of the utility model is described, and the ventilation system 100 can be used in a crankcase 200. In the following description of the present application, the ventilation system 100 is used in a crankcase 200 as an example for detailed description.

[0035] like Figure 1 and Figure 2 As shown, the ventilation system 100 for a crankcase 200 according to the first embodiment of the utility model comprises a ventilation pipe 1, an air collecting device 2 and a control unit (not shown).

[0036] Specifically, the breather pipe 1 is connected to the crankcase 200, and the gas collecting device 2 is connected to the crankcase 200 through the breather pipe 1. The gas collecting device 2 is suitable for being connected to the supercharger 301 or the catalyst 302 in a disconnectable manner. Figure 1 and Figure 2 In the example, one end of the breather pipe 1 is connected to the crankcase 200, and the other end of the breather pipe 1 is connected to the gas collecting device 2. When the gas collecting device 2 is isolated from both the supercharger 301 and the catalyst 302, the mixed gas discharged from the crankcase 200 can be stored in the gas collecting device 2.

[0037] With such arrangement, the mixed gas (eg hydrocarbon mixed gas) in the crankcase 200 can directly enter the gas collecting device 2 through the breather pipe 1, and then enter the supercharger 301 or the catalyst 302 respectively according to the working condition of the engine 300. Compared with the conventional technology in which the mixed gas in the crankcase comes into contact with filtered cold air when it flows out, the ventilation system 100 of the present application changes the flow path of the mixed gas discharged from the crankcase 100, and the filtered cold air directly enters the high-temperature supercharger 301, and the mixed gas discharged from the crankcase 200 does not come into contact with the cold air, thereby avoiding condensation and freezing of the mixed gas at the connection between the ventilation pipe 1 and the air filter outlet pipe. Therefore, after working for a long time, the ventilation system 100 can be prevented from being blocked by ice when the mixed gas in the crankcase 200 is discharged, thereby avoiding the mixed gas in the crankcase 200 from being unable to be discharged in time and the pressure increasing, causing the engine 300 to leak or even be scrapped, thereby improving the performance of the ventilation system 100 and extending the service life of the crankcase 200 and the engine 300.

[0038] In addition, it is possible to prevent the vent pipe 1 from freezing at the connection with the air filter outlet pipe and from falling into the supercharger 301 along the air filter outlet pipe, thereby preventing the components in the supercharger 301 from being damaged and making the supercharger 301 unable to perform supercharging, thereby allowing the supercharger 301 to be used normally for a long time, and the normal supercharging of the supercharger 301 provides sufficient intake air for the crankcase 200, providing sufficient power for the vehicle to travel. Moreover, the engine 300 using the ventilation system 100 of the present application can eliminate the hydrocarbon adsorption device in the air filter, reducing the number of components of the engine 300. In addition, the mixed gas discharged from the crankcase 200 can be recycled, thereby improving the utilization rate of the mixed gas and being more environmentally friendly. The vehicle can also travel normally in cold areas, thereby meeting the user's use needs.

[0039] Combination Figure 1 , a control unit (not shown) is respectively connected to the gas collecting device 2, the supercharger 301 and the catalyst 302 for communication, and the control unit is configured to control the gas collecting device 2 to extract the mixed gas discharged from the crankcase 200, and to control the mixed gas in the gas collecting device 2 to selectively flow to the supercharger 301 and the catalyst 302. With such a configuration, the exhaust of the crankcase 100 can be controlled by the control unit according to the working condition of the engine 300, and the control is simple and efficient. In addition, it is also convenient to control the flow path of the mixed gas in the gas collecting device 2, so that the mixed gas in the gas collecting device 2 can be controlled to flow into the supercharger 301 or the catalyst 302 according to the working condition of the engine 300, thereby improving the performance of the ventilation system 100. For example, the control unit can be an ECU.

[0040] According to the ventilation system 100 for the crankcase 200 of the utility model, the flow path of the mixed gas discharged from the crankcase 100 is changed, thereby avoiding the condensation and icing of the mixed gas at the connection between the ventilation pipe 1 and the air filter outlet pipe, preventing the ventilation system 100 from being blocked, and the mixed gas in the crankcase 200 can be discharged normally, so that the crankcase 200 and the engine 300 can be used normally for a long time. In addition, it is also avoided that the connection between the ventilation pipe 1 and the air filter outlet pipe is frozen and falls into the supercharger 301 along the air filter outlet pipe to damage the components of the supercharger 301, so that the supercharger 301 can be used normally for a long time, providing sufficient power for the vehicle to travel. In addition, the control logic of the control unit is simple, and it is also convenient to control the flow path of the mixed gas in the gas collecting device 2 (flowing to the supercharger 301 or the catalyst 302), thereby improving the performance of the ventilation system 100.

[0041] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The gas collecting device 2 includes a gas collecting tank 21 and a pump 22 .

[0042] Specifically, the pump 22 is connected to the control unit in communication, and the pump 22 is disposed between the gas collecting tank 21 and the breather pipe 1 to extract the mixed gas discharged from the crankcase 200 and collect it in the gas collecting tank 21. Figure 1 and Figure 2 In the example, the gas collecting tank 21 is connected to the left side of the pump 22, and the pump 22 is connected to the other end of the ventilation pipe 1. The control unit can control whether the pump 22 extracts the mixed gas in the crankcase 200 according to the working condition of the crankcase 200. Therefore, when the internal pressure of the crankcase 200 reaches a positive pressure and needs to discharge the gas, the control unit can control the pump 22 to extract the mixed gas in the crankcase 200, reduce the pressure in the crankcase 200, so that the crankcase 200 can be used normally, that is, the ventilation system 100 can actively control the constant pressure in the crankcase 200. In addition, the control unit can control the amount of mixed gas discharged from the crankcase 200 through the pump 22, and the exhaust is stable, thereby improving the performance of the ventilation system 100. In addition, the gas collecting tank 21 can store the mixed gas extracted from the crankcase 200 for the subsequent use of the mixed gas. Moreover, when the mixed gas flows from the crankcase 200 to the gas storage tank, it will not come into contact with the cold air, avoiding condensation and icing. For example, the gas collecting tank 21 may be a high-pressure gas storage tank.

[0043] According to some embodiments of the present invention, referring to Figure 2 The gas collecting device 2 further includes an on-off control assembly 23, which is arranged on the gas collecting tank 21. The on-off control assembly 23 includes a main body 231, a plurality of on-off components (not shown) and an on-off component controller 232. In the description of the present utility model, "plurality" means two or more. The plurality of on-off components are all arranged in the main body 231, and the gas collecting tank 21 is connected to the supercharger 301 and the catalyst 302 through the plurality of on-off components in an on-off manner. The on-off component controller 232 is arranged on the main body 231, and the on-off component controller 232 is respectively connected to the control unit and the plurality of on-off components for communication.

[0044] For example, in Figure 2 In the example, the on-off control assembly 23 is used to control the on-off connection between the gas collecting tank 21 and the supercharger 301 and the catalyst 302. Two on-off components are provided, one of which can control the connection or disconnection between the gas collecting tank 21 and the supercharger 301, and the other on-off component can control the connection or disconnection between the gas collecting tank 21 and the catalyst 302. The on-off component controller 232 can receive a signal from the control unit and control the opening and closing of multiple on-off components.

[0045] For example, Figure 5As shown, it can be determined whether to discharge the mixed gas into the supercharger 301 according to the working temperature of the supercharger 301 and the engine 300. When the mixed gas needs to be discharged into the supercharger 301, the control unit transmits information to the on-off component controller 232, and the on-off component controller 232 controls one of the above-mentioned on-off components to open, so that the gas collecting tank 21 and the supercharger 301 are connected, and the mixed gas enters the supercharger 301. When the exhaust is completed, the control unit transmits information to the on-off component controller 232, and the on-off component controller 232 controls one of the above-mentioned on-off components to close, so that the gas collecting tank 21 and the supercharger 301 are isolated. In this way, the ventilation system 100 can intelligently exhaust according to the cabin temperature.

[0046] When the control unit recognizes that the pressure of the GPF pressure sensor is too high, the control unit transmits information to the on-off component controller 232, and the on-off component controller 232 controls the above-mentioned other on-off component to open, so that the gas collecting tank 21 and the catalyst 302 are connected, and the mixed gas enters the catalyst 302, and the mixed gas burns in the catalyst 302 to burn and remove the particulate matter in the GPF. When the exhaust is completed, the control unit transmits information to the on-off component controller 232, and the on-off component controller 232 controls the above-mentioned other on-off component to close, so that the gas collecting tank 21 and the catalyst 302 are isolated. It should be noted that the catalyst 302 is provided with a gasoline engine particulate filter (GPF) and a GPF pressure detection component, and the GPF pressure detection component is connected to the control unit in communication. When the GPF pressure detection component detects that the pressure is relatively high, the GPF pressure detection component transmits a signal to the control unit, and the control unit transmits the signal to the on-off component controller 232. In this way, it is convenient to control the mixed gas to be discharged into the catalyst 302 according to the working condition of the catalyst 302. The GPF pressure detection component can be a GPF pressure sensor.

[0047] Thus, the on-off piece can output the mixed gas stably, avoiding the exhaust flow rate being affected by the negative pressure of the supercharger 301, so that the supercharger 301 can be used normally, and the discharge flow rate of the mixed gas can be effectively controlled. In addition, because the temperature of the supercharger 301 itself is relatively high, the mixed gas and the cold air are not easy to condense and freeze after meeting in the supercharger 301, thereby effectively avoiding the icing problem and facilitating the normal use of the supercharger 301 for a long time. In addition, the particulate matter in the GPF can be burned and removed, and the mixed gas is consumed at the same time, which is also more environmentally friendly. In addition, the control unit is communicatively connected with the on-off piece controller 232, which is convenient for controlling the opening, closing and opening degree of the on-off piece, thereby reducing the difficulty of operation and improving the opening and closing accuracy of the on-off piece.

[0048] According to some embodiments of the present invention, referring to Figure 2The on-off control assembly 23 further includes a first exhaust pipe 233 and a second exhaust pipe 234 . The first exhaust pipe 233 is arranged between one of the plurality of on-off components and the supercharger 301 , and the second exhaust pipe 234 is arranged between another one of the plurality of on-off components and the catalyst 302 .

[0049] For example, in Figure 2 In the example, the upper end of the first exhaust pipe 233 is connected to one of the above-mentioned on-off pieces, and the lower end of the first exhaust pipe 233 is connected to the supercharger 301, and the supercharger 301 is located below the gas collecting tank 21. The upper end of the second exhaust pipe 234 is connected to the above-mentioned other on-off piece, and the lower end of the second exhaust pipe 234 is connected to the catalyst 302. In this way, the mixed gas in the gas collecting tank 21 can flow into the supercharger 301 along the first exhaust pipe 233 after passing through one of the above-mentioned on-off pieces, and the mixed gas in the gas collecting tank 21 can flow into the catalyst 302 along the second exhaust pipe 234 after passing through the above-mentioned other on-off piece, thereby improving the smoothness of the flow of the mixed gas. In addition, it is also convenient to make the mixed gas in the gas collecting tank 21 flow along the first exhaust pipe 233 and the second exhaust pipe 234 to the corresponding supercharger 301 and the catalyst 302 according to the working condition of the engine 300, so that the mixed gas is consumed along different paths, which can fully consume the mixed gas, improve the performance of the engine 300, and be more environmentally friendly and energy-saving.

[0050] Further, refer to Figure 3 and Figure 4 The gas collecting device 2 further includes a gas collecting tank detection member 235, which is in communication connection with the control unit and is disposed on the body 231 to detect the pressure in the gas collecting tank 21. Thus, when the pressure in the gas collecting tank 21 reaches a predetermined threshold, the gas collecting tank detection member 235 transmits the detected signal to the control unit, and the control unit transmits the signal to the on-off member controller 232, and the on-off member controller 232 controls one of the multiple on-off members to be opened, so as to discharge the mixed gas in the gas collecting tank 21 into the corresponding supercharging box 301 and the catalyst 302 (such as Figure 5 The control flow shown in the figure) reduces the pressure in the gas collecting tank 21, thereby preventing the mixed gas in the crankcase 200 from being discharged into the gas collecting tank 21 due to the high pressure in the gas collecting tank 21, thereby allowing the gas collecting tank 21 and the crankcase 200 to be used normally for a long time. It should be noted that the gas collecting tank detection member 235 can be a gas collecting tank pressure sensor.

[0051] According to some embodiments of the present invention, referring to Figure 3 and Figure 4, the on-off control assembly 23 is arranged at the bottom of the gas collecting tank 21. Such an arrangement is conducive to the mixed gas in the gas collecting tank 21 flowing to the supercharger 301 and the catalyst 302. In addition, it is also conducive to the arrangement of the gas collecting tank 21, the on-off control assembly 23, the supercharger 301 and the catalyst 302, so as to facilitate the installation and use of the ventilation system 100. In addition, the distance between the on-off control assembly 23 and the supercharger 301 and the catalyst 302 is also shortened, thereby shortening the length of the first exhaust pipe 233 and the second exhaust pipe 234, reducing the material consumption of the first exhaust pipe 233 and the second exhaust pipe 234, and reducing the production cost of the on-off control assembly 23.

[0052] According to some optional embodiments of the present invention, the switch is a one-way switch, which can control the mixed gas to flow to the supercharger 301 and the catalyst 302 in one direction, so as to prevent the mixed gas from flowing back into the gas collecting tank 21 and affecting the normal operation of the supercharger 301 and the catalyst 302.

[0053] Optionally, the on-off member is a one-way valve. With such a configuration, the one-way valve has a simple structure and is easy to install, thereby improving the installation efficiency of the on-off control assembly 23. In addition, the one-way valve has good sealing performance, thereby avoiding leakage of the one-way valve and improving the use effect of the on-off control assembly 23.

[0054] According to the crankcase 200 of the second embodiment of the utility model, refer to Figure 2 , including a ventilation system 100 for a crankcase 200 according to the above-mentioned first aspect embodiment of the utility model, and the mixed gas exhausted from the crankcase 200 is exhausted through the ventilation system 100.

[0055] For example, in Figure 2 In the example, the ventilation system 100 is located on the front side of the crankcase 200. When the pressure in the crankcase 200 is relatively large (i.e., the pressure is positive), the ventilation system 100 works to discharge the mixed gas in the crankcase 200, reduce the pressure in the crankcase 200, and ensure the normal use of the crankcase 200. Moreover, the ventilation system 100 prevents the mixed gas discharged from the crankcase 200 from condensing and freezing due to contact with the cold air flowing into the air filter outlet pipe, thereby extending the service life of the crankcase 200. In other words, the present application solves the problem of freezing of the ventilation pipe 1 of the crankcase 200 when the vehicle is running in a low temperature environment (e.g., -20°C to -40°C). The freezing of the ventilation pipe 1 will cause the engine 300 to stall, and the risks of oil leakage of the crankcase 200 oil seal and damage to the supercharger 301 will not occur again.

[0056] According to some embodiments of the utility model, a pressure detection component is provided in the crankcase 200 (as shown in the figure), and the pressure detection component is communicatively connected with the control unit of the ventilation system 100. The pressure detection component can detect the pressure in the crankcase 200. When the pressure detection component detects that the pressure in the crankcase 200 reaches a predetermined positive pressure value (i.e., the above-mentioned pressure is larger), the pressure detection component transmits a signal to the control unit, and the control unit controls the pump 22 to extract the mixed gas in the crankcase 200 to reduce the pressure in the crankcase 200. When the pressure detection component detects that the pressure in the crankcase 200 reaches a predetermined negative pressure value (i.e., the above-mentioned pressure is smaller), the pressure detection component transmits a signal to the control unit, and the control unit controls the supercharger 301 to absorb the filtered air to maintain a constant pressure (such as Figure 5 As a result, the pressure detection element can timely check the pressure in the crankcase 200, so as to timely discharge the mixed gas and inhale the filtered air, maintain the constant pressure of the crankcase 200, and thus enable the crankcase 200 to be used normally for a long time. It should be noted that the pressure detection element can be a pressure sensor.

[0057] Optionally, refer to Figure 2 The engine 300 according to the utility model includes the crankcase 200 according to the second embodiment of the utility model. Thus, the engine 300 can operate normally for a long time in cold areas, improve the adaptability of the engine 300, and thus improve the performance of the engine 300.

[0058] A vehicle (not shown) according to an embodiment of the third aspect of the utility model comprises the crankcase 200 or the engine 300 according to the embodiment of the second aspect of the utility model.

[0059] According to the vehicle of the present invention, by adopting the crankcase 200 or the engine 300, the vehicle can run normally for a long time in cold areas, and the environmental adaptability of the vehicle will be stronger, thereby improving the use performance of the vehicle.

[0060] The crankcase 200 , the engine 300 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0061] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A ventilation system for a crankcase, characterized in that: include: a breather pipe connected to the crankcase; An air collecting device, the air collecting device is connected to the crankcase through the vent pipe, and the air collecting device is suitable for being connected to the supercharger or the catalyst in an on-off manner; A control unit is communicatively connected with the air collecting device, the supercharger and the catalyst respectively, and the control unit is configured to control the air collecting device to extract the mixed gas exhausted from the crankcase, and to control the mixed gas in the air collecting device to selectively flow to the supercharger and the catalyst.

2. The ventilation system for a crankcase according to claim 1, characterized in that The gas collecting device comprises: Gas collecting tank; A pump is communicatively connected with the control unit, and the pump is arranged between the gas collecting tank and the breather pipe to extract the mixed gas discharged from the crankcase and collect it in the gas collecting tank.

3. The crankcase ventilation system according to claim 2, characterized in that The gas collecting device further includes an on-off control assembly, which is arranged on the gas collecting tank, and the on-off control assembly includes: ontology, A plurality of on-off pieces, wherein the plurality of on-off pieces are all arranged in the body, and the gas collecting tank is connected to the supercharger and the catalyst through the plurality of on-off pieces in an on-off manner; A switch controller is arranged on the main body, and is respectively connected to the control unit and the plurality of switch controllers for communication.

4. The ventilation system for a crankcase according to claim 3, characterized in that The on-off control assembly further comprises: a first exhaust pipe, the first exhaust pipe being arranged between one of the plurality of on-off components and the supercharger; A second exhaust pipe is provided between another one of the plurality of on-off members and the catalyst.

5. The ventilation system for a crankcase according to claim 3, characterized in that The gas collecting device further comprises: A gas collecting tank detection component is communicatively connected with the control unit, and the gas collecting tank detection component is arranged on the main body to detect the pressure in the gas collecting tank.

6. The crankcase ventilation system according to claim 3, characterized in that The on-off control assembly is arranged at the bottom of the gas collecting tank.

7. The ventilation system for a crankcase according to claim 3, characterized in that The switch is a one-way switch.

8. A crankcase, characterized in that: It comprises a ventilation system for a crankcase according to any one of claims 1 to 7, wherein the mixed gas exhausted from the crankcase is exhausted through the ventilation system.

9. The crankcase according to claim 8, characterized in that A pressure detection component is provided in the crankcase, and the pressure detection component is communicatively connected with the control unit of the ventilation system.

10. A vehicle, characterized in that: Comprising a crankcase according to claim 8 or 9.

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