Crankcase ventilation system of engine and automobile

Abstract

The utility model discloses a crankcase ventilation system of an engine and an automobile, the crankcase ventilation system comprises the engine, the air inlet end of the engine is provided with an air inlet pipe, and an air filter, an air compressor, an intercooler, a throttle valve and an air inlet manifold are sequentially arranged along the air inlet pipe at intervals. The crankcase ventilation system further comprises a full-load breathing pipe, a mixing pipe and a high-speed gas pipe, the gas inlet end of the full-load breathing pipe is communicated with an oil-gas separator of the engine, and the gas outlet end of the full-load breathing pipe is connected with the side wall of the mixing pipe and communicated with the interior of the mixing pipe. The gas inlet end of the high-speed gas pipe communicates with a pipeline, located on the downstream of an outlet of a gas compressor, of a gas inlet pipe of the engine, and the gas outlet end of the high-speed gas pipe communicates with the gas inlet end of the mixing pipe. The air outlet end of the mixing pipe is communicated with the position, located between an air filter and an air compressor, of an air inlet pipe of the engine. According to the crankcase ventilation system, the problem that the full-load breathing pipe is frozen can be solved through a simple structure.

Description

Technical Field

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

[0002] When the engine is working, the high-pressure combustible mixture and burned gas in the combustion chamber will more or less leak into the crankcase through the gap between the piston group and the cylinder, causing blowby. The components of blowby are unburned fuel gas, water vapor and exhaust gas, which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil. And the water vapor condenses in the engine oil, forming sludge and blocking the oil circuit. The acidic gas in the exhaust gas mixes into the lubrication system, which will cause corrosion and accelerated wear of engine parts. In addition, blowby will increase the pressure in the crankcase, making the crankcase pressure too high and destroying its seal, which will cause the oil to leak and lose. Therefore, in order to prevent the crankcase pressure from being too high, extend the service life of the engine oil, reduce the wear and corrosion of parts, and prevent the engine from leaking oil, the engine crankcase ventilation system must be set in the engine design process. In addition, blowby contains a large amount of pollutants. In order to meet the increasingly stringent emission requirements and improve economy, the engine crankcase ventilation system must also be set.

[0003] The crankcase ventilation system of the engine includes a natural crankcase ventilation system and a forced crankcase ventilation system. Gasoline engines often use a positive crankcase ventilation system (PCV), and diesel engines are also gradually using a forced crankcase ventilation system. The forced crankcase ventilation system is to transport the mixed gas in the crankcase to the appropriate position of the intake pipe through the full-load breathing pipe, so that the mixed gas in the crankcase returns to the cylinder for re-combustion, thereby reducing the pollutants in the engine emission system and improving the fuel economy of the engine. However, in extremely cold weather, the outlet of the full-load breathing pipe, that is, the junction of the full-load breathing pipe and the engine intake pipe is prone to ice. Once the full-load breathing pipe is frozen, it will cause blockage in the discharge process of the mixed gas in the crankcase, causing the pressure of the engine crankcase to be high, and then causing damage to the engine. In order to solve this problem, some manufacturers use the technology of water heating or electric heating of the full-load breathing pipe, but these technologies will add a whole set of equipment for heating, which will greatly increase the complexity of the structure of the engine crankcase ventilation system and increase the cost of the whole vehicle.

[0004] Therefore, the crankcase ventilation system of the engine in the prior art has the problem that it is impossible to avoid freezing of the full-load breathing tube by using a simple structure. Utility Model Content

[0005] The utility model aims to solve the problem that the crankcase ventilation system of the engine in the prior art cannot use a simple structure to avoid freezing of the full-load breathing tube.

[0006] To solve the above problems, an embodiment of the utility model provides a crankcase ventilation system of an engine, including an engine, an air filter, a compressor, an intercooler, a throttle valve and an intake manifold; wherein, an intake pipe is provided at the intake end of the engine, and along the gas flow direction in the intake pipe of the engine, the air filter, the compressor, the intercooler, the throttle valve and the intake manifold are arranged in sequence at intervals on the intake pipe of the engine.

[0007] The crankcase ventilation system also includes a full-load breathing pipe, a mixing pipe and a high-speed gas pipe, wherein the air inlet end of the full-load breathing pipe is connected and communicated with the oil-gas separator of the engine, and the air outlet end of the full-load breathing pipe is connected to the side wall of the mixing pipe and communicated with the interior of the mixing pipe. The air inlet end of the high-speed gas pipe is connected and communicated with the pipeline on the air inlet pipe of the engine located downstream of the outlet of the compressor, and the air outlet end of the high-speed gas pipe is connected and communicated with the air inlet end of the mixing pipe. The air outlet end of the mixing pipe is connected and communicated with the position on the air inlet pipe of the engine located between the air filter and the compressor.

[0008] With the above technical solution, in the crankcase ventilation system of the engine, the outlet end of the full-load breathing pipe is connected to the position between the air filter and the compressor on the intake pipe of the engine through the mixing pipe. On the intake pipe of the engine, after being filtered by the air filter, the air will be transported to the engine cylinder through the compressor, intercooler, throttle and intake manifold in sequence to participate in combustion, wherein the compressor will pressurize the air, making the air in a high-pressure state. The air inlet of the high-speed gas pipe is connected to the pipeline downstream of the outlet of the compressor, and the air outlet of the high-speed gas pipe is connected and communicated with the air inlet of the mixing pipe, so that part of the high-pressure air in the air inlet of the engine after the compressor supercharging process will flow into the high-speed gas pipe. After the high-speed air at the air outlet of the high-speed gas pipe is sprayed into the mixing pipe, it will play a flushing role on the air outlet of the full-load breathing pipe connected to the inside of the mixing pipe, flushing away the water vapor at the air outlet of the full-load breathing pipe, and preventing the air outlet of the full-load breathing pipe from freezing. Even when the air outlet of the full-load breathing pipe is frozen, the ice can be flushed away by the high-speed gas, thereby preventing the accumulation of ice from clogging the full-load breathing pipe. In other words, the crankcase ventilation system of the engine only needs to add a pipeline composed of a high-speed gas pipe and a mixing pipe to avoid and solve the problem of freezing of the full-load breathing pipe. Compared with the technology of adding a whole set of equipment for heating to water-heat or electrically heat the full-load breathing pipe in the prior art, the structure of the crankcase ventilation system of the engine is simpler.

[0009] In addition, the air pressurized by the compressor has a certain temperature, and the part of the engine's intake pipe that has been pressurized by the compressor has a certain temperature of high-pressure and high-speed air. The high-pressure and high-speed gas with a certain temperature has a better anti-icing effect when flushing the outlet end of the full-load breathing pipe. Even if there are ice cubes at the outlet end of the full-load breathing pipe, the high-speed air with a certain temperature can play a certain role in melting the ice cubes at the outlet end of the full-load breathing pipe while flushing. Therefore, the air intake end of the high-speed gas pipe is arranged on the intake pipe of the engine between the compressor and the intercooler, which can further enhance the anti-icing effect of the crankcase ventilation system of the engine on the full-load breathing pipe.

[0010] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, and an acceleration nozzle is arranged at the position of the high-speed gas pipe near the intake end of the mixing pipe. The intake end of the high-speed gas pipe is connected to the intake pipe between the compressor and the intercooler; or the intake end of the high-speed gas pipe is connected to the intake pipe between the intercooler and the throttle. With the above technical solution, the acceleration nozzle can further accelerate the flow rate of the gas blown into the full-load breathing pipe, and the intake end of the high-speed gas pipe can be adjusted and arranged according to needs.

[0011] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, wherein the high-speed gas pipe includes a first connecting pipe, an accelerating nozzle and a second connecting pipe, and the accelerating nozzle is located between the first connecting pipe and the second connecting pipe. In addition, the air inlet end of the accelerating nozzle is connected and communicated with the air outlet end of the first connecting pipe, and the air outlet end of the accelerating nozzle is connected and communicated with the air inlet end of the second connecting pipe. The air inlet end of the first connecting pipe is connected and communicated with a position on the air inlet pipe of the engine between the compressor and the intercooler. The air outlet end of the second connecting pipe is connected and communicated with the air inlet end of the mixing pipe.

[0012] By adopting the above technical solution, the accelerating nozzle can accelerate the air in the high-speed gas pipe. The first connecting pipe is used to connect and communicate the accelerating nozzle with the position on the intake pipe of the engine located between the compressor and the intercooler, and the second connecting pipe is used to connect and communicate the accelerating nozzle with the intake end of the mixing pipe.

[0013] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, wherein the accelerating nozzle is a venturi tube structure, and the accelerating nozzle includes a throat, a contraction portion, and an expansion portion. The throat is located between the contraction portion and the expansion portion, and the air inlet end of the throat is connected and communicated with the air outlet end of the contraction portion, and the air outlet end of the throat is connected and communicated with the air inlet end of the expansion portion. The air inlet end of the contraction portion is connected and communicated with the air outlet end of the first connecting pipe. The air outlet end of the expansion portion is connected and communicated with the air inlet end of the second connecting pipe.

[0014] By adopting the above technical solution, this arrangement enables the accelerating nozzle to convert the high-pressure air flowing into the accelerating nozzle into high-speed air according to the Bernoulli principle, and the air at the throat of the accelerating nozzle is in a high-speed and low-pressure state.

[0015] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, the crankcase ventilation system also includes a carbon canister and an adsorption tube, and the air outlet end of the adsorption tube is connected and communicated with the throat of the acceleration nozzle, and the air inlet end of the adsorption tube is connected and communicated with the carbon canister.

[0016] By adopting the above technical solution, since the air at the throat of the accelerator nozzle is in a low-pressure state, the gas pressure at the throat of the accelerator nozzle is lower than the gas pressure in the carbon canister. Therefore, the throat of the accelerator nozzle can adsorb the oil-gas mixture in the carbon canister through the adsorption tube, and transport the oil-gas mixture to the engine cylinder through the second connecting pipe, the mixing pipe, and the engine's intake pipe in turn to participate in combustion again, so as to reduce the vehicle's fuel consumption and pollutant emissions.

[0017] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, wherein the axis of the outlet end of the high-speed gas pipe is vertically arranged relative to the axis of the position between the air filter and the compressor on the engine's intake pipe.

[0018] By adopting the above technical solution, this arrangement helps the high-speed gas ejected from the outlet end of the high-speed gas pipe to flush the outlet end of the full-load breathing pipe connected to the engine's intake pipe at a position between the air filter and the compressor through a mixing pipe, thereby further enhancing the engine's crankcase ventilation system's ability to eliminate ice in the full-load breathing pipe.

[0019] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, wherein the outer walls of the high-speed gas pipe, the mixing pipe and the full-load breathing pipe are all wrapped with an insulation layer, and the material of the insulation layer is a thermal insulation material.

[0020] By adopting the above technical scheme, the outer walls of the high-speed gas pipe, the mixing pipe and the full-load breathing pipe are all wrapped with an insulation layer, so that the high-speed gas pipe, the mixing pipe and the full-load breathing pipe have a better insulation effect. The air pressurized by the compressor has a certain temperature, and the part of the high-pressure air with a certain temperature in the intake pipe of the engine after the compressor pressurization treatment is sprayed out through the high-speed gas pipe to the outlet end of the full-load breathing pipe as high-speed air with a certain temperature. Therefore, the setting of the insulation layer on the outer wall of the high-speed gas pipe can reduce the heat loss of the air passing through the high-speed gas pipe, so that the high-speed air sprayed to the outlet end of the full-load breathing pipe has a higher temperature, thereby improving the crankcase ventilation system of the engine to eliminate ice in the full-load breathing pipe.

[0021] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, in which a full-load breathing pipe and a mixing pipe are integrally formed.

[0022] By adopting the above technical solution, the mixing tube can be understood as a pipe joint that is connected to the outlet end of the full-load breathing tube and connects the outlet end of the high-speed gas tube with the position on the intake pipe of the engine located between the air filter and the compressor. Therefore, the integrated molding of the full-load breathing tube and the mixing tube can facilitate the assembly of the outlet end of the full-load breathing tube with other pipelines.

[0023] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, the cross-sections of the full-load breathing pipe, the mixing pipe and the high-speed gas pipe are all circular, and the diameter of the high-speed gas pipe is smaller than the diameter of the mixing pipe.

[0024] By adopting the above technical solution, the full-load breathing tube, mixing tube and high-speed gas tube with circular cross-section are convenient for assembly and replacement between the various pipes. The diameter of the high-speed gas tube is smaller than the diameter of the mixing tube, so that the outlet end of the high-speed gas tube can be plugged into the mixing tube, and because the outlet end of the high-speed gas tube sprays high-speed air into the mixing tube, the outlet end of the high-speed gas tube is plugged into the mixing tube, which can improve the sealing performance between the high-speed gas tube and the mixing tube.

[0025] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, and the crankcase ventilation system also includes a first quick connector, a second quick connector and a third quick connector. The first quick connector is arranged at the air intake end of the full-load breathing tube, and the air intake end of the full-load breathing tube is connected to the oil-gas separator of the engine through the first quick connector.

[0026] The second quick connector is arranged at the outlet of the mixing tube, and the outlet end of the mixing tube is connected to the position of the intake pipe of the engine between the air filter and the compressor through the second quick connector. The third quick connector is arranged at the intake port of the high-speed gas pipe, and the intake end of the high-speed gas pipe is connected to the position of the intake pipe of the engine between the compressor and the intercooler through the third quick connector.

[0027] By adopting the above technical solution, multiple quick connectors are set to connect the corresponding air inlet or outlet ends of the full-load breathing tube, mixing tube and high-speed gas tube. The structure is simple, which is conducive to production and cost reduction, and can achieve quick installation and connection.

[0028] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a crankcase ventilation system of an engine, wherein the mixing tube is in any one of a straight tube shape, an oblique tube shape or an arc tube shape. The full-load breathing tube is in any one of a straight tube shape, an oblique tube shape or an arc tube shape. The end surface of one side where the mixing tube and the high-speed gas tube are connected is a flat structure or an arc surface structure.

[0029] By adopting the above technical solution, the mixing tube, full-load breathing tube and high-speed gas tube can be set with different structures or shapes according to actual needs and the spatial layout of the internal structure, and can be flexibly deformed according to the actual situation of the engine and the vehicle cabin, with a wider range of applications and application scenarios.

[0030] An embodiment of the utility model further provides an automobile, comprising a crankcase ventilation system of any one of the above-mentioned engines.

[0031] By adopting the above technical solution, in the crankcase ventilation system of the engine of the automobile, part of the high-pressure air in the engine intake pipe after being pressurized by the compressor is converted into high-speed air through the high-speed gas pipe, and then sprayed into the mixing pipe, and plays a flushing role on the outlet end of the full-load breathing pipe connected to the inside of the mixing pipe, thereby preventing the full-load breathing pipe from freezing. When the outlet end of the full-load breathing pipe freezes, the high-speed gas can also be used to impact the ice, thereby preventing the ice from accumulating and blocking the full-load breathing pipe. Therefore, the crankcase ventilation system of the engine of the automobile only needs to add a pipeline consisting of a high-speed gas pipe and a mixing pipe to avoid the problem of freezing of the full-load breathing pipe. In addition, the air pressurized by the compressor has a certain temperature, so that the high-speed air in the engine's intake pipe has a certain temperature after being pressurized by the compressor and sprayed to the outlet end of the full-load breathing pipe through the high-speed gas pipe and the mixing pipe, which further enhances the anti-icing effect when the high-speed gas flushes the full-load breathing pipe. When there is ice in the full-load breathing pipe, it can also flush the outlet end of the full-load breathing pipe or the ice in the full-load breathing pipe, and can also play a certain melting role.

[0032] The beneficial effects of the utility model are:

[0033] In the crankcase ventilation system of the engine provided by the utility model, the outlet end of the full-load breathing tube is connected to the position between the air filter and the compressor on the intake pipe of the engine through the mixing tube. On the intake pipe of the engine, after being filtered by the air filter, the air will be transported to the engine cylinder through the compressor, the intercooler, the throttle and the intake manifold in sequence to participate in combustion, wherein the compressor will pressurize the air, so that the air is in a high-pressure state. The intake end of the high-speed gas pipe is connected and communicated with the pipeline located downstream of the outlet of the compressor on the intake pipe of the engine, and the outlet end of the high-speed gas pipe is connected and communicated with the intake end of the mixing tube, so that part of the high-pressure air in the intake pipe of the engine after the compressor supercharging treatment will flow into the high-speed gas pipe, and due to the characteristics of the high-speed gas pipe, the high-pressure air passing through the high-speed gas pipe will be accelerated, so that the air flowing out of the high-speed gas pipe is in a high-speed state. After the high-speed air at the outlet end of the high-speed gas pipe is sprayed into the mixing pipe, it will flush the outlet end of the full-load breathing pipe connected to the inside of the mixing pipe, preventing the outlet end of the full-load breathing pipe from freezing. Even if the outlet end of the full-load breathing pipe is frozen, the ice can be knocked off, thereby preventing ice accumulation from clogging the full-load breathing pipe. In other words, the crankcase ventilation system of the engine only needs to add a pipeline consisting of a high-speed gas pipe and a mixing pipe to avoid and solve the problem of freezing of the full-load breathing pipe. Compared with the technology of adding a whole set of heating equipment to water-heat or electrically heat the full-load breathing pipe in the prior art, the structure of the crankcase ventilation system of the engine is simpler.

[0034] In addition, the air after being pressurized by the compressor has a certain temperature. The part of the high-pressure air with a certain temperature in the intake pipe of the engine after being pressurized by the compressor will become high-speed air with a certain temperature after passing through the high-speed gas pipe. The high-pressure and high-speed gas with a certain temperature has a better anti-icing effect when flushing the outlet end of the full-load breathing pipe. Even if there are ice cubes at the outlet end of the full-load breathing pipe, the high-speed air with a certain temperature can not only flush the ice cubes at the outlet end of the full-load breathing pipe, but also melt them to a certain extent. Therefore, the air intake end of the high-speed gas pipe is arranged on the intake pipe of the engine at a position between the compressor and the intercooler, which can further enhance the anti-icing effect of the crankcase ventilation system of the engine on the full-load breathing pipe, as well as the ability to eliminate ice cubes at the outlet end of the full-load breathing pipe.

[0035] Other features and corresponding beneficial effects of the utility model are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects become obvious from the records in the specification of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a crankcase ventilation system of an engine provided in Example 1 of the utility model;

[0037] Figure 2 A schematic cross-sectional view of a mixing pipe and its surrounding structure of a crankcase ventilation system of an engine provided in Example 1 of the utility model;

[0038] Figure 3 A schematic diagram of the partial structure of a quick connector in a crankcase ventilation system of an engine provided by Example 2 of the utility model;

[0039] Figure 4 A schematic structural diagram of a quick connector, an air filter and a compressor in a crankcase ventilation system of an engine provided in Example 2 of the utility model;

[0040] Figure 5 A schematic structural diagram of a mixing pipe in a crankcase ventilation system of an engine provided in Example 3 of the utility model, in which the top of the mixing pipe is in an arc shape;

[0041] Figure 6 A schematic diagram of the structure of a bent pipe in a crankcase ventilation system of an engine provided by Example 4 of the utility model;

[0042] Figure 7 A schematic diagram of a structure in which a mixing pipe and an intake pipe in a crankcase ventilation system of an engine provided in Example 5 of the utility model are arranged obliquely;

[0043] Figure 8 The cross-sectional shape of the mixing pipe in the crankcase ventilation system of the engine provided in Example 6 of the utility model is a schematic diagram of an arc-shaped structure.

[0044] Description of reference numerals:

[0045] 11. Engine; 111. Intake pipe; 112. Exhaust pipe;

[0046] 12. Air filter; 13. Compressor; 14. Intercooler; 15. Throttle; 16. Intake manifold; 17. Full-load breathing pipe; 18. Mixing pipe;

[0047] 19, high-speed gas pipe; 191, first connecting pipe; 192, accelerating nozzle; 1921, throat; 1922, contraction; 1923, expansion; 193, second connecting pipe;

[0048] 20. Carbon canister; 21. Adsorption tube; 22. Turbine; 23. Catalyst package; 24. Muffler; 25. First quick connector; 26. Second quick connector; 27. Third quick connector. DETAILED DESCRIPTION

[0049] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0050] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0051] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0052] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0053] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0054] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0055] Example 1

[0056] This embodiment provides a crankcase ventilation system of an engine, such as Figure 1 As shown, it includes an engine 11, an air filter 12, a compressor 13, an intercooler 14, a throttle 15 and an intake manifold 16. Among them, an intake pipe 111 is provided at the intake end of the engine 11, and along the gas flow in the intake pipe 111 of the engine 11, the air filter 12, the compressor 13, the intercooler 14, the throttle 15 and the intake manifold 16 are arranged in sequence at intervals on the intake pipe 111 of the engine 11. In addition, an exhaust pipe 112 is provided at the outlet end of the engine 11, and along the gas flow in the exhaust pipe 112 of the engine 11, a turbine 22, a catalyst package 23 and a muffler 24 are arranged in sequence at intervals. Specifically, the air filter 12 , the compressor 13 , the intercooler 14 , the throttle valve 15 and the intake manifold 16 are respectively fixedly connected to the intake pipe 111 of the engine 11 ; the turbine 22 , the catalyst package 23 and the muffler 24 are respectively fixedly connected to the exhaust pipe 112 of the engine 11 .

[0057] like Figure 1 and Figure 2 As shown, the crankcase ventilation system also includes a full-load breathing pipe 17, a mixing pipe 18 and a high-speed gas pipe 19, wherein the air inlet end of the full-load breathing pipe 17 is connected and communicated with the oil-gas separator (not shown) of the engine 11, and the air outlet end of the full-load breathing pipe 17 is connected to the side wall of the mixing pipe 18 and communicated with the interior of the mixing pipe 18. The air inlet end of the high-speed gas pipe 19 is connected and communicated with the pipeline located downstream of the outlet of the compressor 13 on the air inlet pipe 111 of the engine 11, and the air outlet end of the high-speed gas pipe 19 is connected and communicated with the air inlet end of the mixing pipe 18. The air outlet end of the mixing pipe 18 is connected and communicated with the position located between the air filter 12 and the compressor 13 on the air inlet pipe 111 of the engine 11.

[0058] Specifically, the full-load breathing pipe 17 and the oil-gas separator, the high-speed gas pipe 19 and the intake pipe 111 of the engine 11, the high-speed gas pipe 19 and the mixing pipe 18, and the mixing pipe 18 and the intake pipe 111 of the engine 11 can all be connected by fixed connection methods such as clamping and screwing, or by setting quick connectors, clamps, etc., and in order to ensure the sealing, sealing members can also be set at the connection positions of each pipeline, which can be specifically set according to the actual design.

[0059] It should be noted that, see Figure 1 In the crankcase ventilation system of the engine, the outlet end of the full-load breathing pipe 17 is connected to the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11 through the mixing pipe 18, and, as Figure 2As shown, the arrows in the figure point to the gas flow direction from the full-load breathing tube 17 to the mixing tube 18 and then into the intake pipe 111, the gas flow direction from the high-speed gas tube 19 to the mixing tube 18 and then into the intake pipe 111, and the gas flow direction in the intake pipe 111. Figure 1 As shown, on the intake pipe 111 of the engine 11, after being filtered by the air filter 12, the air will be transported to the cylinder of the engine 11 through the compressor 13, the intercooler 14, the throttle 15 and the intake manifold 16 in sequence to participate in combustion. Among them, the compressor 13 will boost the intake air, so that the intake air is in a high-pressure state, and the intake air at this time also has a certain speed. The intake end of the high-speed gas pipe 19 is connected and communicated with the position between the compressor 13 and the intercooler 14 on the intake pipe 111 of the engine 11, and the outlet end of the high-speed gas pipe 19 is connected and communicated with the intake end of the mixing pipe 18. Therefore, part of the high-pressure air in the intake pipe 111 of the engine 11 that has been boosted by the compressor 13 will flow into the high-speed gas pipe 19, and due to the acceleration characteristics of the high-speed gas pipe 19, the high-pressure air passing through the high-speed gas pipe 19 will be accelerated, so that the air flowing out of the high-speed gas pipe 19 is in a high-speed state. See Figure 2 After the high-speed air at the outlet end of the high-speed gas pipe 19 is sprayed into the mixing pipe 18, it will flush the outlet end of the full-load breathing pipe 17 connected to the inside of the mixing pipe 18, and can flush out the water vapor at the outlet end of the full-load breathing pipe 17 and the mixing pipe 18. In the cold winter, after the water vapor at the outlet end of the full-load breathing pipe 17 and the mixing pipe 18 is flushed out, the outlet end of the full-load breathing pipe 17 can be prevented from freezing, and the accumulation of ice at the outlet end of the full-load breathing pipe 17 can also be avoided to block the full-load breathing pipe 17, thereby effectively preventing and solving the problem of freezing at the outlet end of the full-load breathing pipe 17, and well preventing and solving the problem of freezing at the outlet end of the full-load breathing pipe 17.

[0060] In addition, the air pressurized by the compressor 13 has a certain temperature. The part of the high-pressure air with a certain temperature in the intake pipe 111 of the engine 11 after the compressor 13 pressurization process will become high-speed air with a certain temperature after passing through the high-speed gas pipe 19. The high-speed gas with a certain temperature has a better anti-icing effect when flushing the outlet end of the full-load breathing pipe 17. In other words, the crankcase ventilation system of the engine 11 only needs to add a pipeline composed of the high-speed gas pipe 19 and the mixing pipe 18 to avoid the problem of freezing of the full-load breathing pipe 17. Compared with the technology of adding a whole set of heating equipment to water-heat or electrically heat the full-load breathing pipe 17 in the prior art, the structure of the crankcase ventilation system of the engine is simpler and can also effectively reduce costs.

[0061] In another case, when the outlet end of the full-load breathing pipe 17 is accidentally frozen, for example, when there are ice cubes at the outlet end of the full-load breathing pipe 17, the high-speed air with a certain temperature can not only flush the ice cubes at the outlet end of the full-load breathing pipe 17, but also melt the ice cubes to a certain extent. Therefore, the high-speed gas with a certain temperature in the high-speed gas pipe 19 can quickly melt and flush the ice cubes at the outlet end of the full-load breathing pipe 17, and because the air inlet end of the high-speed gas pipe 19 is arranged on the air inlet pipe 111 at a position downstream of the compressor 13, the gas entering the high-speed gas pipe 19 is a gas with a certain temperature and a certain speed, which can further enhance the engine crankcase ventilation system's ability to eliminate ice cubes in the full-load breathing pipe 17.

[0062] The embodiment of the present invention also provides a crankcase ventilation system of an engine, wherein an acceleration nozzle 192 is provided at a position of the high-speed gas pipe 19 near the intake end of the mixing pipe 18. In addition, the intake end of the high-speed gas pipe 19 is connected to the intake pipe 111 between the compressor 13 and the intercooler 14; or the intake end of the high-speed gas pipe 19 is connected to the intake pipe 111 between the intercooler 14 and the throttle 15. The intake end of the high-speed gas pipe 19 can be adjusted and arranged according to needs, such as Figure 1 As shown, the intake end of the high-speed gas pipe 19 is connected to the intake pipe 111 between the compressor 13 and the intercooler 14 .

[0063] Specifically, in this embodiment, an acceleration nozzle 192 is arranged at a position of the high-speed gas pipe 19 near the air inlet end of the mixing tube 18, which can further increase the air flow velocity of the high-speed gas pipe blowing toward the mixing tube 18 and the air outlet end of the full-load breathing tube 17, thereby improving the anti-icing effect of the mixing tube 18 and the air outlet end of the full-load breathing tube 17.

[0064] It should be noted that the acceleration nozzle 192 in this embodiment can be a structural change of the high-speed gas pipe 19, or an additional structure can be set on the high-speed gas pipe 19 for acceleration. For example, the pipeline of the high-speed gas pipe 19 near the air inlet end of the mixing tube 18 can be set as a venturi tube, and the gas flowing through the venturi tube is accelerated according to the Bernoulli effect. The pipeline of the high-speed gas pipe 19 near the air inlet end of the mixing tube 18 can also be set as a nozzle, and the internal gas can be accelerated by the nozzle. A small accelerator can also be set at the air inlet end of the high-speed gas pipe 19 near the mixing tube 18

[0065] Or a compressor to further accelerate the internal gas processing. Those skilled in the art can also set other structures to increase the gas flow rate in the high-speed gas pipe 19 or provide high-speed gas, and this embodiment does not make the sole limitation to this.

[0066] Furthermore, if Figure 1As shown, in a specific embodiment of the crankcase ventilation system provided in the present application, the high-speed gas pipe 19 includes a first connecting pipe 191, an accelerating nozzle 192 and a second connecting pipe 193, and the accelerating nozzle 192 is located between the first connecting pipe 191 and the second connecting pipe 193. In addition, the air inlet end of the accelerating nozzle 192 is connected and communicated with the air outlet end of the first connecting pipe 191, and the air outlet end of the accelerating nozzle 192 is connected and communicated with the air inlet end of the second connecting pipe 193. The air inlet end of the first connecting pipe 191 is connected and communicated with a position on the air inlet pipe 111 of the engine 11 between the compressor 13 and the intercooler 14. The air outlet end of the second connecting pipe 193 is connected and communicated with the air inlet end of the mixing pipe 18. Specifically, the accelerating nozzle 192 and the first connecting pipe 191, and the accelerating nozzle 192 and the second connecting pipe 193 can be connected by means of clamping, screwing, etc., and to ensure sealing, a sealing member can be provided at the connection between the accelerating nozzle 192 and the first connecting pipe 191, and the accelerating nozzle 192 and the second connecting pipe 193. The first connecting pipe 191, the accelerating nozzle 192 and the second connecting pipe 193 can also be integrally formed, which can be specifically set according to the actual design, and this embodiment does not specifically limit this.

[0067] It should be noted that the accelerating nozzle 192 can accelerate the air in the high-speed gas pipe 19, the first connecting pipe 191 is used to connect and communicate the accelerating nozzle 192 with the position on the intake pipe 111 of the engine 11 between the compressor 13 and the intercooler 14, and the second connecting pipe 193 is used to connect and communicate the accelerating nozzle 192 with the intake end of the mixing pipe 18. In addition, the specific shape and length of the first connecting pipe 191 and the second connecting pipe 193 can be adjusted according to the actual layout space in the engine 11, the position of the accelerating nozzle 192 and the intake pipe 111 of the engine 11 between the compressor 13 and the intercooler 14, and the layout position of the mixing pipe 18, so as to make the layout of the high-speed gas pipe 19 more flexible.

[0068] Furthermore, if Figure 1 As shown, in a specific embodiment of the crankcase ventilation system provided by the present application, the accelerating nozzle 192 is a venturi tube structure, and the accelerating nozzle 192 includes a throat 1921, a contraction portion 1922 and an expansion portion 1923. Among them, the throat 1921 is located between the contraction portion 1922 and the expansion portion 1923, and the air inlet end of the throat 1921 is connected and communicated with the air outlet end of the contraction portion 1922, and the air outlet end of the throat 1921 is connected and communicated with the air inlet end of the expansion portion 1923. The air inlet end of the contraction portion 1922 is connected and communicated with the air outlet end of the first connecting pipe 191. The air outlet end of the expansion portion 1923 is connected and communicated with the air inlet end of the second connecting pipe 193. In addition, the throat 1921, the contraction portion 1922 and the expansion portion 1923 are integrally formed to form the accelerating nozzle 192.

[0069] It should be noted that this arrangement enables the accelerating nozzle 192 to convert the high-pressure air flowing into the accelerating nozzle 192 into high-speed air according to the Bernoulli principle, and the air at the throat 1921 of the accelerating nozzle 192 is in a high-speed and low-pressure state.

[0070] The Bernoulli principle can be understood as the conversion of fluid pressure and flow rate. In this embodiment, the specific application of the Bernoulli principle is that after the high-pressure air flows into the contraction portion 1922 of the accelerating nozzle 192, the cross-sectional area from the contraction portion 1922 to the throat 1921 gradually decreases, so that the pressure of the air flowing into the accelerating nozzle 192 gradually decreases and the flow rate gradually increases, thereby making the air flowing to the throat 1921 of the accelerating nozzle 192 in a high-speed and low-pressure state.

[0071] Furthermore, in the crankcase ventilation system of the engine in this embodiment, as Figure 1 As shown, the crankcase ventilation system also includes a carbon canister 20 and an adsorption pipe 21, and the air outlet end of the adsorption pipe 21 is connected and communicated with the throat 1921 of the acceleration nozzle 192, and the air inlet end of the adsorption pipe 21 is connected and communicated with the carbon canister 20. It should be noted that, since the air at the throat 1921 of the acceleration nozzle 192 is in a low-pressure state, the gas pressure at the throat 1921 of the acceleration nozzle 192 is lower than the gas pressure in the carbon canister 20, so the throat 1921 of the acceleration nozzle 192 can adsorb the oil-gas mixture in the carbon canister 20 through the adsorption pipe 21, and the oil-gas mixture is sequentially transported to the cylinder of the engine 11 through the second connecting pipe 193, the mixing pipe 18, and the intake pipe 111 of the engine 11 to participate in combustion again, so as to reduce the fuel consumption of the vehicle and the emission of pollutants.

[0072] In addition, the adsorption tube 21 and the throat 1921 of the accelerating nozzle 192, as well as the adsorption tube 21 and the carbon canister 20 can be connected by fixed connection methods such as snap-on connection and screw connection, and seals can also be provided at the connection between the adsorption tube 21 and the throat 1921 of the accelerating nozzle 192, as well as between the adsorption tube 21 and the carbon canister 20. The specific settings can be made according to the actual design, and this embodiment does not make any specific limitations on this.

[0073] In addition, the adsorption tube 21 can be set to a cylindrical, prism-shaped, rectangular parallelepiped and other shapes. Preferably, in order to make the adsorption tube 21 more conventional and facilitate the replacement of parts of the adsorption tube 21, the adsorption tube 21 in this embodiment is set to a cylindrical shape.

[0074] Furthermore, in the crankcase ventilation system of the engine in this embodiment, the axis of the outlet end of the high-speed gas pipe 19 may be arranged vertically or non-vertically relative to the axis of the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11. Preferably, in order to increase the flushing force of the high-speed gas ejected from the outlet end of the high-speed gas pipe 19 on the outlet end of the full-load breathing pipe 17 connected to the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11 through the mixing pipe 18, thereby further improving the ability of the crankcase ventilation system of the engine to eliminate ice in the full-load breathing pipe 17, as shown in FIG. Figure 1 and Figure 2 As shown, in this embodiment, the axis of the outlet end of the high-speed gas pipe 19 is vertically arranged relative to the axis of the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11.

[0075] Furthermore, in the crankcase ventilation system of the engine in this embodiment, as Figure 1 As shown, the outer walls of the high-speed gas pipe 19, the mixing pipe 18 and the full-load breathing pipe 17 are all wrapped with a heat-insulating layer (not shown in the figure), and the material of the heat-insulating layer is a heat-insulating material. In addition, the heat-insulating material can be polyurethane foam, phenolic foam, extruded polystyrene foam, etc., which is not specifically limited in this embodiment.

[0076] It should be noted that the air pressurized by the compressor 13 has a certain temperature, and the part of the high-pressure air with a certain temperature in the intake pipe 111 of the engine 11 after the pressurization by the compressor 13 is sprayed out as high-speed air with a certain temperature to the outlet end of the full-load breathing pipe 17 through the high-speed gas pipe 19. Therefore, the setting of the insulation layer on the outer wall of the high-speed gas pipe 19 can reduce the heat loss of the air passing through the high-speed gas pipe 19, so that the high-speed air sprayed to the outlet end of the full-load breathing pipe 17 has a higher temperature, thereby improving the crankcase ventilation system of the engine to eliminate ice in the full-load breathing pipe 17.

[0077] Furthermore, in the crankcase ventilation system of the engine in this embodiment, as Figure 1 As shown, the full-load breathing tube 17 and the mixing tube 18 can be connected by means of clamping, screwing, bonding, etc., or can be integrally formed, or quick connectors can be provided between different pipe connection locations.

[0078] Further, in the crankcase ventilation system of the engine in this embodiment, the cross-sections of the full-load breathing pipe 17, the mixing pipe 18 and the high-speed gas pipe 19 can be circular, rectangular, rectangular and the like. Preferably, in order to make the full-load breathing pipe 17, the mixing pipe 18 and the high-speed gas pipe 19 more conventional and to facilitate the replacement of the parts of the full-load breathing pipe 17, the mixing pipe 18 and the high-speed gas pipe 19, the cross-sections of the full-load breathing pipe 17, the mixing pipe 18 and the high-speed gas pipe 19 in this embodiment are all circular. In addition, the diameter of the high-speed gas pipe 19 is smaller than the diameter of the mixing pipe 18, so that the outlet end of the high-speed gas pipe 19 is inserted into the mixing pipe 18, and since the outlet end of the high-speed gas pipe 19 sprays high-speed air into the mixing pipe 18, the outlet end of the high-speed gas pipe 19 is inserted into the mixing pipe 18 to improve the sealing performance between the high-speed gas pipe 19 and the mixing pipe 18.

[0079] Furthermore, in the crankcase ventilation system of the engine in this embodiment, as Figure 1 As shown, the outlet end of the intake manifold 16 is arranged on the intake end of the engine 11 to shorten the size of the intake pipe 111 of the engine 11, thereby making the structure of the engine 11 more compact.

[0080] The specific working process of the crankcase ventilation system of the engine is as follows: Figure 1 As shown, the full-load breathing pipe 17 will transport the gas separated from the oil and gas by the oil and gas separator of the engine 11 back to the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11 through the mixing pipe 18, so that the gas separated from the oil and gas is transported back to the cylinder of the engine 11 through the intake pipe 111 of the engine 11, and then participates in combustion again. In extremely cold weather, the outlet of the existing full-load breathing pipe 17, that is, the position where the full-load breathing pipe 17 is connected to the side wall of the mixing pipe 18 and communicated with the inside of the mixing pipe 18, will freeze.

[0081] In the present application, after the air intake pipe 111 of the engine 11 is pressurized by the compressor 13, part of the air with a certain temperature and in a high-pressure state is transported to the acceleration nozzle 192 of the high-speed gas pipe 19 through the first connecting pipe 191 of the high-speed gas pipe 19, and the high-pressure air with a certain temperature flowing into the acceleration nozzle 192 is converted into high-speed low-pressure air with a certain temperature according to the Bernoulli principle, and then transported to the mixing tube 18 through the second connecting pipe 193 of the high-speed gas pipe 19. The high-speed gas with a certain temperature will flush away the water vapor at the outlet end of the full-load breathing tube 17 to prevent the outlet end of the full-load breathing tube 17 from freezing. Even if there is ice at the outlet end of the full-load breathing tube 17, the ice can be flushed away by the high-speed gas, thereby preventing the accumulation of ice from clogging the full-load breathing tube 17. After flushing, the air will flow back to the intake pipe 111 of the engine 11 through the position between the air filter 12 and the compressor 13 on the intake pipe 111 of the engine 11, and will be transported back to the cylinder of the engine 11 through the intake pipe 111 of the engine 11 to participate in combustion. Therefore, the crankcase ventilation system of the engine only needs to add a pipeline consisting of a high-speed gas pipe 19 and a mixing pipe 18 to avoid and solve the problem of freezing of the full-load breathing pipe 17. Compared with the technology of adding a whole set of heating equipment to water-heat or electrically heat the full-load breathing pipe 17 in the prior art, the structure of the crankcase ventilation system of the engine is simpler.

[0082] In addition, since the air at the throat 1921 of the acceleration nozzle 192 is in a low-pressure state, the gas pressure at the throat 1921 of the acceleration nozzle 192 is lower than the gas pressure in the carbon canister 20. Therefore, the throat 1921 of the acceleration nozzle 192 can adsorb the oil-gas mixture in the carbon canister 20 through the adsorption tube 21, and transport the oil-gas mixture to the cylinder of the engine 11 through the second connecting pipe 193, the mixing pipe 18, and the intake pipe 111 of the engine 11 in turn to participate in combustion again, so as to reduce the fuel consumption of the vehicle and the emission of pollutants.

[0083] Example 2

[0084] The implementation of this embodiment discloses a crankcase ventilation system of an engine. It should be noted that the pipeline and structure of the crankcase ventilation system in this embodiment are exactly the same as those in Example 1, and the only difference is that the crankcase ventilation system in this embodiment further includes a first quick connector 25, a second quick connector 26 and a third quick connector 27. Figure 3 and Figure 4 As shown, the first quick connector 25 is arranged at the air intake end of the full-load breathing pipe 17, and the air intake end of the full-load breathing pipe 17 is connected to the oil-gas separator (not shown in the figure) of the engine through the first quick connector 25.

[0085] The second quick connector 26 is arranged at the outlet of the mixing tube 18, and the outlet end of the mixing tube 18 is connected to the position of the intake pipe 111 of the engine between the air filter 12 and the compressor 13 through the second quick connector 26. The third quick connector 27 is arranged at the intake port of the high-speed gas pipe 19, and the intake end of the high-speed gas pipe 19 is connected to the position of the intake pipe 111 of the engine between the compressor 13 and the intercooler 14 through the third quick connector 27.

[0086] See also Figure 3 ,exist Figure 3 In the illustrated embodiment, the high-speed gas pipe 19 is arranged at the top of the mixing tube 18 , and the air inlet of the mixing tube 18 connected to the air outlet end of the full-load breathing tube 17 is arranged at the top of the side wall of the mixing tube 18 .

[0087] Specifically, in this embodiment, a plurality of quick connectors are provided to connect the corresponding air inlet ends or air outlet ends of the full-load breathing tube 17, the mixing tube 18 and the high-speed gas tube 19. The structure is simple, and is conducive to production and cost reduction, and can achieve quick installation and connection.

[0088] More specifically, in this embodiment, the first quick connector 25, the second quick connector 26 and the third quick connector 27 can be set as snap-on quick connectors, or as threaded quick connectors, or flange quick connectors. Those skilled in the art can design and select according to actual needs, and this embodiment does not make the sole limitation to this.

[0089] Further, see Figure 3 In this embodiment, the three quick connectors are all configured as bayonet-shaped quick connectors. The quick connectors can be connected and installed by snapping together. This is convenient for installation, has good sealing performance, and is also beneficial to production and cost reduction. In order to make the structure compact, the lengths of the high-speed gas pipe 19, the full-load breathing pipe 17, and the mixing pipe 18 can be appropriately adjusted according to needs.

[0090] Furthermore, the high-speed gas pipe 19, the full-load breathing pipe 17 and the mixing pipe 18 can also be made into a flexible tubular structure, and the joints connected to the pipelines or part of the pipelines can be made into a rigid tubular structure. When connecting, part of the rigid tubular structure is inserted into the flexible tubular structure, and then a clamp is used for rapid installation. In this case, the quick connector can be omitted. Those skilled in the art should understand that a fixed connection can also be made by a quick connector.

[0091] Example 3

[0092] The implementation of this embodiment also provides a crankcase ventilation system of an engine. It should be noted that, Figure 5As shown, the difference between this embodiment and embodiment 1 is that: in embodiment 1, the top of the end where the mixing tube 18 and the high-speed gas tube 19 are connected is flat, while in this embodiment, the top of the end where the mixing tube 18 and the high-speed gas tube 19 are connected is arc-shaped. This structural setting can make the high-speed gas tube 19 blow directly to the mixing tube 18 and the outlet end of the full-load breathing tube 17, thereby avoiding the loss of high-speed gas.

[0093] Example 4

[0094] The implementation of this embodiment also provides a crankcase ventilation system of an engine. It should be noted that, Figure 6 As shown, the difference between this embodiment and embodiment 1 is that the full-load breathing tube 17 in embodiment 1 is a straight tube, while the full-load breathing tube 17 in this embodiment is a curved tube, and the full-load breathing tube 17 is not limited to Figure 6 The curved shape can also be deformed according to the actual situation of the engine and the vehicle cabin.

[0095] Example 5

[0096] The implementation of this embodiment also provides a crankcase ventilation system of an engine. It should be noted that, Figure 7 As shown, the difference between this embodiment and embodiment 1 is that: in embodiment 1, the mixing tube 18 and the intake pipe 111 are arranged vertically, while in this embodiment, the mixing tube 18 and the intake pipe 111 are arranged inclined. It should be noted that in actual arrangement, the inclination angle between the mixing tube 18 and the intake pipe 111 can be flexibly adjusted, and the inclination angle between the mixing tube 18 and the intake pipe 111 can be optimized according to simulation calculation results and test results.

[0097] Example 6

[0098] The implementation of this embodiment also provides a crankcase ventilation system of an engine. It should be noted that, Figure 8 As shown, the difference between this embodiment and embodiment 1 is that the cross-sectional shape of the mixing tube 18 in this embodiment along the axial direction is an arc shape. With this structural design, the connection between the full-load breathing tube 17 and the mixing tube 18 is relatively smooth and is not prone to ice formation. In addition, the gas flow in the mixing tube 18, the high-speed gas tube 19 and the full-load breathing tube 17 remains unchanged, which can further enhance the anti-icing effect of the outlet end of the full-load breathing tube 17. It should be understood that the pipeline structure and joint structure of the mixing tube 18, the high-speed gas tube 19 and the full-load breathing tube 17 can also be deformed into other shapes or structures according to actual needs, and this embodiment will not be repeated.

[0099] Example 7

[0100] This embodiment provides a car, including a crankcase ventilation system of any one of the engines in Embodiments 1 to 6. The car can be a fuel car or a hybrid car, which can be set according to actual needs, and this embodiment does not specifically limit this.

[0101] It should be noted that if Figure 1 As shown, in the crankcase ventilation system of the engine of the automobile, part of the high-pressure air in the intake pipe 111 of the engine 11 after being pressurized by the compressor 13 is converted into high-speed air through the high-speed gas pipe 19, and then is sprayed into the mixing pipe 18, and has a flushing effect on the outlet end of the full-load breathing pipe 17 connected to the inside of the mixing pipe 18, so that the outlet end of the full-load breathing pipe 17 and the water vapor in the mixing pipe 18 can be flushed away. In the cold winter, after the outlet end of the full-load breathing pipe 17 and the water vapor in the mixing pipe 18 are flushed away, the outlet end of the full-load breathing pipe 17 can be prevented from freezing, and the ice cubes at the outlet end of the full-load breathing pipe 17 can be prevented from accumulating and clogging the full-load breathing pipe 17, thereby effectively preventing and solving the problem of freezing at the outlet end of the full-load breathing pipe 17. Therefore, the crankcase ventilation system of the engine of the automobile only needs to add a pipeline composed of a high-speed gas pipe 19 and a mixing pipe 18 to avoid the problem of ice formation in the full-load breathing pipe 17. Compared with the technology of adding a whole set of heating equipment to water-heat or electrically heat the full-load breathing pipe 17 in the prior art, the structure of the crankcase ventilation system of the engine is simpler. In addition, the air pressurized by the compressor 13 has a certain temperature, so that the high-speed air in the intake pipe 111 of the engine 11 after the compressor 13 pressurization treatment and the high-speed air sprayed to the outlet end of the full-load breathing pipe 17 through the high-speed gas pipe 19 and the mixing pipe 18 has a certain temperature, which can flush the ice at the outlet end of the full-load breathing pipe 17 and also play a certain melting role, thereby improving the ability of the crankcase ventilation system of the engine of the automobile to eliminate ice in the full-load breathing pipe 17.

[0102] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A crankcase ventilation system of an engine, comprising an engine, an air filter, a compressor, an intercooler, a throttle valve and an intake manifold; wherein: The air intake end of the engine is provided with an air intake pipe, and along the gas flow direction in the air intake pipe of the engine, the air filter, the compressor, the intercooler, the throttle valve and the intake manifold are sequentially arranged at intervals on the air intake pipe of the engine; characterized in that: The crankcase ventilation system also includes a full-load breathing tube, a mixing tube and a high-speed gas tube, wherein The air inlet end of the full-load breathing pipe is connected to and communicated with the oil-gas separator of the engine, and the air outlet end of the full-load breathing pipe is connected to the side wall of the mixing tube and communicated with the interior of the mixing tube; the air inlet end of the high-speed gas pipe is connected to and communicated with the pipeline on the air inlet pipe of the engine that is located downstream of the outlet of the compressor, and the air outlet end of the high-speed gas pipe is connected to and communicated with the air inlet end of the mixing tube; the air outlet end of the mixing tube is connected to and communicated with a position on the air inlet pipe of the engine that is located between the air filter and the compressor.

2. The crankcase ventilation system of an engine according to claim 1, characterized in that: The high-speed gas pipe is provided with an accelerating nozzle at a position close to the air inlet end of the mixing pipe; and The air inlet end of the high-speed gas pipe is connected to the air inlet pipe between the compressor and the intercooler; or The air inlet end of the high-speed gas pipe is connected to the air inlet pipe between the intercooler and the throttle valve.

3. The crankcase ventilation system of an engine as claimed in claim 2, characterized in that: The high-speed gas pipe includes a first connecting pipe, an accelerating nozzle and a second connecting pipe, wherein the accelerating nozzle is located between the first connecting pipe and the second connecting pipe, and The air inlet end of the accelerating nozzle is connected and communicated with the air outlet end of the first connecting pipe, and the air outlet end of the accelerating nozzle is connected and communicated with the air inlet end of the second connecting pipe; The air inlet end of the first connecting pipe is connected and communicated with a position on the air inlet pipe of the engine between the compressor and the intercooler; the air outlet end of the second connecting pipe is connected and communicated with the air inlet end of the mixing pipe.

4. The crankcase ventilation system of an engine as claimed in claim 3, characterized in that: The accelerating nozzle is a Venturi tube structure, and comprises a throat, a contraction part and an expansion part; wherein The throat is located between the contraction portion and the expansion portion, and the air inlet end of the throat is connected and communicated with the air outlet end of the contraction portion, and the air outlet end of the throat is connected and communicated with the air inlet end of the expansion portion; The air inlet end of the contraction portion is connected and communicated with the air outlet end of the first connecting pipe; the air outlet end of the expansion portion is connected and communicated with the air inlet end of the second connecting pipe.

5. The crankcase ventilation system of an engine as claimed in claim 4, characterized in that: The crankcase ventilation system further includes a carbon canister and an adsorption pipe, wherein an air outlet end of the adsorption pipe is connected and communicated with the throat of the acceleration nozzle, and an air inlet end of the adsorption pipe is connected and communicated with the carbon canister.

6. The crankcase ventilation system of an engine according to any one of claims 1 to 5, characterized in that: The axis of the outlet end of the high-speed gas pipe is arranged perpendicularly relative to the axis of the position between the air filter and the compressor on the intake pipe of the engine.

7. The crankcase ventilation system of an engine according to any one of claims 1 to 5, characterized in that: The outer walls of the high-speed gas pipe, the mixing pipe and the full-load breathing pipe are all wrapped with a thermal insulation layer, and the material of the thermal insulation layer is a thermal insulation material.

8. The crankcase ventilation system of an engine according to any one of claims 1 to 5, characterized in that: The full-load breathing tube is integrally formed with the mixing tube.

9. The crankcase ventilation system of an engine according to any one of claims 1 to 5, characterized in that: The cross sections of the full-load breathing tube, the mixing tube and the high-speed gas tube are all circular, and the diameter of the high-speed gas tube is smaller than the diameter of the mixing tube.

10. The crankcase ventilation system of an engine according to any one of claims 1 to 5, characterized in that: The crankcase ventilation system further comprises a first quick connector, a second quick connector and a third quick connector; wherein The first quick connector is arranged at the air inlet end of the full-load breathing tube, and the air inlet end of the full-load breathing tube is connected to the oil-gas separator of the engine through the first quick connector; The second quick connector is arranged at the outlet of the mixing tube, and the air outlet end of the mixing tube is connected to the position of the air intake pipe of the engine between the air filter and the compressor through the second quick connector; The third quick connector is arranged at the air inlet of the high-speed gas pipe, and the air inlet end of the high-speed gas pipe is connected to the position of the air inlet pipe of the engine between the compressor and the intercooler through the third quick connector.

11. The crankcase ventilation system of an engine as claimed in claim 10, characterized in that: The mixing tube is in any one of a straight tube shape, an oblique tube shape or an arc tube shape; The full-load breathing tube is in any one of a straight tube shape, an oblique tube shape or an arc tube shape; and The end surface of one side where the mixing tube and the high-speed gas tube are connected is a plane structure or an arc-shaped structure.

12. A car, characterized in that: A crankcase ventilation system for an engine comprising the invention as claimed in any one of claims 1 to 11.

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