Engine, power assembly and vehicle

Abstract

The utility model discloses an engine, a power assembly and a vehicle, and the engine comprises an engine body, which is provided with a blow-by gas outlet and a gas inlet; the first valve body is provided with a first valve body first valve port, a first valve body second valve port and a first valve body third valve port, the first valve body first valve port is communicated with the blow-by gas outlet, the first valve body second valve port is communicated with the gas inlet, and the first valve body third valve port is communicated with the gas outlet; a first valve port of the first valve body and a third valve port of the first valve body can be selectively communicated; the supercharger is provided with a supercharger inlet and a supercharger outlet, and the supercharger outlet is communicated with the air inlet; one end of the supercharging loop is connected with the supercharger inlet, and the other end of the supercharging loop is connected with the supercharger outlet; and the third valve port of the first valve body is communicated into the pressurization loop. According to the engine designed by the utility model, the blow-by gas return effect is better.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to an engine, a power assembly and a vehicle. Background Art

[0002] In the related art, a vehicle is provided with an oil-gas separator for separating oil and gas in the engine. In some existing technologies, the oil-gas separator is connected to a vent valve, which is connected to two vent pipes to discharge the blowby gas flowing through the oil-gas separator, and the blowby gas return effect is poor. Utility Model Content

[0003] 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 an engine. The engine blowby gas return effect designed according to the utility model is better.

[0004] The utility model also provides a power assembly having the engine.

[0005] The utility model also provides a vehicle having the power assembly or engine.

[0006] According to the utility model, the engine includes: a body, the body is provided with a blow-by gas outlet and an air inlet; a first valve body, the first valve body has a first valve port of the first valve body, a second valve port of the first valve body and a third valve port of the first valve body, the first valve port of the first valve body is connected to the blow-by gas outlet, the second valve port of the first valve body is connected to the air inlet, and the first valve port of the first valve body and the third valve port of the first valve body can be selectively connected; a supercharger, the supercharger is provided with a supercharger inlet and a supercharger outlet, the supercharger outlet is connected to the air inlet; a supercharging circuit, one end of the supercharging circuit is connected to the supercharger inlet, and the other end of the supercharging circuit is connected to the supercharger outlet; wherein the third valve port of the first valve body is connected to the inside of the supercharging circuit.

[0007] According to the utility model, the engine is provided with a supercharging circuit, so as to utilize the pressure difference brought by the supercharger to generate negative pressure at the third valve port of the first valve body to discharge the blowby gas in the engine body, thereby improving the blowby gas return effect of the engine.

[0008] According to some embodiments of the utility model, the engine also includes: a second valve body, the second valve body is arranged in the boost circuit and has a second valve body first valve port, a second valve body second valve port and a second valve body third valve port, the second valve body first valve port is connected to the supercharger outlet, the second valve body second valve port is connected to the supercharger inlet, the second valve body third valve port is connected to the first valve body third valve port, the second valve body second valve port is connected to the second valve body third valve port, and the second valve body second valve port is selectively connected to the first valve port of the second valve body.

[0009] According to some embodiments of the present invention, the second valve body is constructed as a Venturi structure and is suitable for generating negative pressure at the third valve port of the second valve body to suck blowby gas when the first valve port of the second valve body is connected to the second valve port of the second valve body.

[0010] According to some embodiments of the utility model, the second valve body includes a first tubular cavity segment, a second tubular cavity segment and a third tubular cavity segment which are connected in sequence, and the flow area of ​​the first tubular cavity segment gradually decreases along the direction of the first tubular cavity segment toward the second tubular cavity segment; the flow area of ​​the third tubular cavity segment gradually increases along the direction of the second tubular cavity segment toward the third tubular cavity segment; wherein the first valve port of the second valve body is formed at the end of the first tubular cavity segment away from the second tubular cavity segment; the second valve port of the second valve body is formed at the end of the third tubular cavity segment away from the second tubular cavity segment; and the second tubular cavity segment is formed with the third valve port of the second valve body.

[0011] According to some embodiments of the present invention, the diameter of the second valve port of the first valve body is d1, the diameter of the third valve port of the first valve body is d2, and the following conditions are satisfied: 1 / 2≤d1 / d2≤2 / 3.

[0012] According to some embodiments of the present invention, the diameter of the second valve port of the first valve body is d1, and satisfies: 9mm≤d1≤10mm.

[0013] According to some embodiments of the present invention, the diameter of the third valve port of the first valve body is d2, and satisfies: 15mm≤d2≤18mm.

[0014] According to some embodiments of the utility model, a diaphragm for controlling the selective conduction between the first valve port of the first valve body and the third valve port of the first valve body is disposed in the first valve body, and an air supply hole is disposed on the diaphragm.

[0015] According to some embodiments of the present invention, the cross-sectional area of ​​the diaphragm is s1, and the cross-sectional area of ​​the air replenishing hole is s2 and they satisfy: 1 / 10≤s2 / s1≤1 / 5.

[0016] According to some embodiments of the present invention, the diameter of the air supply hole is d3 and satisfies: 4mm≤d3≤8mm.

[0017] According to some embodiments of the present utility model, the engine further includes: an oil-gas separator, wherein the oil-gas separator is respectively connected to the blow-by gas outlet and the first valve port of the first valve body.

[0018] According to some embodiments of the present utility model, the engine further comprises: an air filter, wherein the inlet of the air filter is connected to the outside atmosphere, and the outlet of the air filter is connected to the inlet of the supercharger.

[0019] The powertrain according to the second embodiment of the utility model is briefly described below.

[0020] The power assembly according to the utility model includes the engine described in any one of the above embodiments. Since the power assembly according to the utility model is provided with the engine described in the above embodiments, the power assembly has a simple structure and a better blowby gas return effect.

[0021] The following briefly describes a vehicle according to an embodiment of the third aspect of the utility model.

[0022] The vehicle according to the utility model includes the powertrain described in the above embodiments or includes the engine described in any one of the above embodiments. Since the vehicle according to the utility model is provided with the powertrain or the engine of the above embodiments, the vehicle is safer to use.

[0023] 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

[0024] 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:

[0025] Figure 1 It is a principle diagram of an engine according to an embodiment of the utility model.

[0026] Figure 2 It is an overall structural diagram of the second valve body according to an embodiment of the utility model.

[0027] Figure 3 It is an overall schematic diagram of the second valve body according to an embodiment of the utility model.

[0028] Figure 4 It is an overall structural diagram of the first valve body according to an embodiment of the utility model.

[0029] Reference numerals:

[0030] 1000, engine;

[0031] 1. Engine body; a. Blow-by gas outlet; b. Air inlet;

[0032] 2. first valve body; c. first valve port of the first valve body; d. second valve port of the first valve body; e. third valve port of the first valve body;

[0033] 3. Supercharger; f. Supercharger inlet; g. Supercharger outlet;

[0034] 4. second valve body; h. first valve port of second valve body; i. second valve port of second valve body; j. third valve port of second valve body; 41. first tubular cavity section; 42. second tubular cavity section; 43. third tubular cavity section;

[0035] 5. Oil-gas separator; 6. Air filter; 7. Check valve; 8. Throttle hole; 9. Throttle valve; 10. Exhaust gas recirculation system. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the related art, a vehicle is provided with an oil-gas separator for separating oil and gas in the engine. In some existing technologies, the oil-gas separator is connected to a vent valve, which is connected to two vent pipes to discharge the blowby gas flowing through the oil-gas separator, and the blowby gas return effect is poor.

[0042] Reference below Figure 1-Figure 4 An engine 1000 according to an embodiment of the present invention is described.

[0043] like Figure 1-Figure 4 As shown, the engine 1000 according to the utility model includes: a body 1, a first valve body 2, a supercharger 3 and a supercharging circuit; the body 1 is provided with a blow-by gas outlet a and an air inlet b; the first valve body 2 has a first valve port c of the first valve body, a second valve port d of the first valve body and a third valve port e of the first valve body, the first valve port c of the first valve body is connected to the blow-by gas outlet a, the second valve port d of the first valve body is connected to the air inlet b, and the first valve port c of the first valve body and the third valve port e of the first valve body can be selectively connected; the supercharger 3 is provided with a supercharger inlet f and a supercharger outlet g, and the supercharger outlet g is connected to the air inlet b; one end of the supercharging circuit is connected to the supercharger inlet f, and the other end of the supercharging circuit is connected to the supercharger outlet g; wherein the third valve port e of the first valve body is connected to the supercharging circuit.

[0044] Specifically, in order to prevent blow-by gas from escaping from the engine body 1 into the atmosphere and causing pollution, and to prevent the un-exhausted blow-by gas from diluting the engine oil in the engine body 1, a first valve body 2, a supercharger 3 and a supercharging circuit are provided to discharge the blow-by gas in the engine body 1. The supercharging circuit utilizes the pressure difference brought by the supercharger 3 to generate negative pressure at the third valve port e of the first valve body, and uses the suction force of the negative pressure to draw the blow-by gas in the engine body 1 connected to the first valve body 2 to the first valve port c of the first valve body.

[0045] According to the utility model, the engine 1000 is provided with a supercharging circuit to utilize the pressure difference brought by the supercharger 3 to generate negative pressure at the third valve port e of the first valve body to discharge the blowby gas in the engine body 1, thereby improving the blowby gas return effect of the engine 1000.

[0046] In some embodiments, structures such as the engine body 1, the first valve body 2, the supercharger 3 and the supercharging circuit are assembled into an engine on an engine assembly line.

[0047] According to some embodiments of the present invention, Figure 1 As shown, the engine 1000 further includes a second valve body 4, which is arranged in the supercharging circuit and has a first valve port h of the second valve body, a second valve port i of the second valve body, and a third valve port j of the second valve body. The first valve port h of the second valve body is connected to the outlet g of the supercharger, the second valve port i of the second valve body is connected to the inlet f of the supercharger, the third valve port j of the second valve body is connected to the third valve port e of the first valve body, the second valve port i of the second valve body is connected to the third valve port j of the second valve body, and the second valve port i of the second valve body is selectively connected to the first valve port h of the second valve body. Specifically, the second valve body 4 is arranged in the supercharging circuit to generate negative pressure at the third valve port j of the second valve body, and the blow-by gas in the body body 1 connected to the first valve body 2 is sucked to the second valve port i of the second valve body by the suction force of the negative pressure, so as to discharge the blow-by gas, so as to enhance the blow-by gas return effect of the engine 1000.

[0048] In some embodiments, the blow-by gas is sucked from the first valve body 2 to the second valve body 4 and connected to the outlet of the differential pressure regulating valve seat after the air filter through a pipeline.

[0049] According to some embodiments of the present invention, Figure 3 As shown, the second valve body 4 is constructed as a Venturi structure and is suitable for generating negative pressure at the third valve port j of the second valve body to suck the blow-by gas when the first valve port h of the second valve body is connected to the second valve port i of the second valve body. The second valve body 4 is constructed as a Venturi structure to generate negative pressure at the third valve port j of the second valve body by using the pressure difference brought by the supercharger 3, and suck the blow-by gas in the body body 1 connected to the first valve body 2 to the second valve port i of the second valve body by the suction force of the negative pressure, thereby improving the blow-by gas return effect of the engine 1000.

[0050] According to some embodiments of the present invention, Figure 3 As shown, the second valve body 4 includes a first tubular cavity section 41, a second tubular cavity section 42 and a third tubular cavity section 43 which are connected in sequence, and the flow area of ​​the first tubular cavity section 41 gradually decreases along the direction of the first tubular cavity section 41 toward the second tubular cavity section 42; the flow area of ​​the third tubular cavity section 43 gradually increases along the direction of the second tubular cavity section 42 toward the third tubular cavity section 43; wherein the end of the first tubular cavity section 41 away from the second tubular cavity section 42 is formed with a first valve port h of the second valve body; the end of the third tubular cavity section 43 away from the second tubular cavity section 42 is formed with a second valve port i of the second valve body; and the second tubular cavity section 42 is formed with a third valve port j of the second valve body.

[0051] Specifically, under the action of the supercharger 3, the air pressure at the first valve port h of the second valve body is greater than the air pressure at the second valve port i of the second valve body, and the air flow flows at a high speed from the first valve port h of the second valve body toward the second valve port i of the second valve body. At this time, the high-speed flowing air flow generates a low pressure at the third valve port j of the second valve body, thereby generating an adsorption effect to suck the air flow at the third valve port e of the first valve body connected to the third valve port j of the second valve body.

[0052] According to some embodiments of the utility model, the diameter of the second valve port d of the first valve body is d1, and the diameter of the third valve port e of the first valve body is d2 and satisfies: 1 / 2≤d1 / d2≤2 / 3. Specifically, the second valve port d of the first valve body is connected to the first pipeline, and the third valve port e of the first valve body is connected to the second pipeline. The diameter of the second valve port d of the first valve body is smaller than the diameter of the third valve port e of the first valve body. Therefore, the first pipeline is thinner than the second pipeline, and the airflow flow rate flowing through the first pipeline is less than the airflow flow rate flowing through the second pipeline. The first valve port c of the first valve body can be selectively connected to the second valve port d of the first valve body or the third valve port e of the first valve body to allow the blowby gas to flow out of the first pipeline or the second pipeline. And the ratio of the diameter of the second valve port d of the first valve body to the diameter of the third valve port e of the first valve body satisfies 1 / 2≤d1 / d2≤2 / 3.

[0053] In some embodiments, the first valve body 2 is configured as a positive crankcase ventilation valve (Positive Crankcase Ventilation, ie, PCV valve).

[0054] According to some embodiments of the present invention, the diameter of the second valve port d of the first valve body is d1, and satisfies: 9mm≤d1≤10mm, d1 can be 9mm, 9.5mm, 9.65mm, 10mm, etc., preferably, d1=9.49mm.

[0055] According to some embodiments of the utility model, the diameter of the third valve port e of the first valve body is d2, and satisfies: 15mm≤d2≤18mm, d2 can be 15mm, 15.5mm, 16.65mm, 18mm, etc., preferably, d2=15.8mm, so that a large amount of blowby gas can be sucked out of the body 1 under the action of the supercharger 3, thereby improving the blowby gas discharge rate of the body 1.

[0056] According to some embodiments of the present utility model, a diaphragm for controlling the selective conduction between the first valve port c of the first valve body and the third valve port e of the first valve body is provided in the first valve body 2, and an air supply hole is provided on the diaphragm. When the blow-by gas pressure is high, the diaphragm is blown up, and at this moment, the third valve port e of the first valve body is connected to the first valve port c of the first valve body, and the blow-by gas flows from the first valve port c of the first valve body toward the second valve port d of the first valve body. Due to the existence of the air-injection through hole on the diaphragm, when the air pressure is low, an air flow from the third valve port e of the first valve body will also flow from the air-injection through hole to the second valve port d of the first valve body to assist the blow-by gas to flow toward the second valve port d of the first valve body. That is, when the diaphragm isolates the third valve port e of the first valve body from the first valve port c of the first valve body, it is not completely isolated; when the blow-by gas pressure is high, the diaphragm is blown up, and at this moment, the third valve port e of the first valve body is connected to the first valve port c of the first valve body, and the blow-by gas flows from the first valve port c of the first valve body toward the third valve port e of the first valve body.

[0057] In some embodiments, the engine 1000 has an air replenishment state, at which time the diaphragm separates the third valve port e of the first valve body from the first valve port c of the first valve body, and the airflow outside the engine 1000 can flow from the second valve port i of the second valve body toward the third valve port j of the second valve body. The external airflow can flow through the first valve port c of the first valve body through the air replenishment hole on the diaphragm to merge with the blowby gas to the second valve port d of the first valve body, and the mixed airflow can be replenished into the interior of the engine body 1.

[0058] According to some embodiments of the utility model, the cross-sectional area of ​​the diaphragm is s1, and the cross-sectional area of ​​the air-injection hole is s2 and satisfies: 1 / 10≤s2 / s1≤1 / 5. It is understandable that the air-injection hole provided on the diaphragm should not be too large. If it is too large, when the diaphragm separates the third valve port e of the first valve body from the first valve port c of the first valve body, blowby gas can still flow from the first valve port c of the first valve body toward the third valve port e of the first valve body, affecting the normal operation of the engine 1000. The air-injection hole provided on the diaphragm should not be too small. If it is too small, it will result in too little external airflow to be injected into the body 1. Therefore, the ratio of the cross-sectional area of ​​the diaphragm to the cross-sectional area of ​​the air-injection hole satisfies 1 / 10≤s2 / s1≤1 / 5.

[0059] According to some embodiments of the utility model, the diameter of the air supply hole is d3 and satisfies: 4mm≤d3≤8mm, d3 can be 4mm, 4.5mm, 5mm, 8mm, etc. Preferably, d3=5mm, so as to ensure the flow rate of external air flow into the body 1 while ensuring that the engine 1000 can work normally.

[0060] According to some embodiments of the present invention, Figure 1As shown, the engine 1000 further includes an oil-gas separator 5, which is respectively connected to the blow-by gas outlet a and the first valve port c of the first valve body. Specifically, the oil-gas separator 5 is suitable for separating the oil and gas in the blow-by gas, and the oil flows back into the engine body 1, and the air flow is discharged from the first valve port c of the first valve body, thereby reducing the blow-by gas and the oil loss in the engine body 1.

[0061] According to some embodiments of the present invention, Figure 1 As shown, the engine 1000 also includes an air filter 6, the inlet of the air filter 6 is connected to the outside atmosphere, and the outlet of the air filter 6 is connected to the inlet f of the supercharger. Specifically, the air filter 6 is suitable for filtering the air, and fresh air is introduced. The gas filtered by the air filter 6 can be released from the outlet. The fresh air and the blowby gas with oil and gas will mix in the pipeline between the air filter 6 and the supercharger 3 to form a mixed gas, and then pass through the second valve body 4 to the first valve body 2, and finally pass into the combustion chamber of the body 1 for combustion. After the airflow passes through the air filter 6, the air pressure is between -5kpa and 0kpa.

[0062] In some embodiments, the engine 1000 further includes a one-way valve 7 and a throttle hole 8 .

[0063] In some embodiments, the engine 1000 further includes an exhaust gas recirculation system 10 (EGR), which is connected to the supercharger 3. The exhaust gas discharged from the engine body 1 can be mixed with the mixed gas again through the exhaust gas recirculation system 10. The exhaust gas generally contains oil and gas. The exhaust gas recirculation system 10 can be used to control the exhaust gas to increase the proportion of oil and gas in the mixed gas, thereby improving the mixing degree of oil and gas with fresh air, so that the mixed gas can be fully burned. Of course, the exhaust gas recirculation system 10 can also adjust the amount of exhaust gas entering to ensure that the amount of oil and gas in the mixed gas is within an appropriate range.

[0064] In some embodiments, the engine 1000 further includes a throttle 9, which is disposed between the supercharger 3 and the air inlet b of the engine body 1. The throttle 9 can control the amount of the mixed gas. On the one hand, the amount of the mixed gas entering the second valve body 4 can be controlled as needed, so that the combustion process can be better performed, the combustion efficiency can be improved, and the fuel consumption can be reduced. On the other hand, the demand for the mixed gas is controlled within a smaller range, so that the cooling amount of the mixed gas can also be controlled within a smaller range, thereby reducing the volume of the engine body 1 and reducing costs. After the airflow passes through the throttle 9, the air pressure is between 70kpa-300kpa.

[0065] In some embodiments, the air flow out of the second valve port d of the first valve body can enter the intake manifold between the throttle 9 and the air inlet b of the engine body 1. Here, the air flow outside the engine 1000 can flow from the second valve port i of the second valve body toward the third valve port j of the second valve body, and after passing through the air supply hole on the diaphragm, it can flow from the first valve port c of the first valve body toward the second valve port d of the first valve body, thereby being supplied to the interior of the engine body 1 through the intake manifold.

[0066] When the blow-by gas flow is large and the air pressure is high, the diaphragm is blown up. At this time, the third valve port e of the first valve body is connected to the first valve port c of the first valve body, and the blow-by gas in the body body 1 enters the oil-gas separator 5, and can enter the second valve body 4 after passing through the first valve body 2. The second valve body 4 is constructed as a Venturi structure to use the pressure difference brought by the supercharger 3 to generate suction, and the blow-by gas in the body body 1 is sucked into the supercharging circuit by means of suction. The second valve port i of the second valve body is connected to the supercharger 3, and the mixed gas of the blow-by gas and the external air flow flows to the body body 1 through the throttle 9, and the body body 1 discharges the exhaust gas. The exhaust gas discharged from the body body 1 can be mixed with the mixed gas again through the exhaust gas recirculation system 10, and the exhaust gas recirculation system 10 can control the exhaust gas to increase the proportion of oil and gas in the mixed gas. In addition, the mixed gas can also flow toward the body body 1 through the one-way valve 7 and the throttle hole 8.

[0067] When the blow-by gas flow rate is small and the air pressure is low, the diaphragm separates the third valve port e of the first valve body from the first valve port c of the first valve body, and the blow-by gas in the engine body 1 enters the oil-gas separator 5, and flows from the first valve port c of the first valve body toward the second valve port d of the first valve body. At the same time, the external air flow flows from the second valve port i of the second valve body toward the third valve port j of the second valve body, and thus flows to the second valve port d of the first valve body through the air replenishment hole on the diaphragm to mix with the blow-by gas. The mixed gas is replenished into the interior of the engine body 1 through the intake manifold to blow the original gas in the engine body 1, thereby promoting the engine body 1 to discharge internal exhaust gas.

[0068] The power assembly according to the present utility model is briefly described below.

[0069] The power assembly according to the utility model includes the engine 1000 described in any one of the above embodiments. Since the power assembly according to the utility model is provided with the engine 1000 described in the above embodiments, the power assembly has a simple structure and a better blowby gas return effect.

[0070] The vehicle according to the present utility model is briefly described below.

[0071] The vehicle according to the utility model includes the powertrain described in the above embodiments or includes the engine 1000 described in any one of the above embodiments. Since the vehicle according to the utility model is provided with the powertrain or the engine 1000 of the above embodiments, the vehicle is safer to use.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0073] Although embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. An engine, characterized in that: include: A machine body (1), wherein the machine body (1) is provided with a blow-by gas outlet (a) and an air inlet (b); A first valve body (2), wherein the first valve body (2) has a first valve port (c), a second valve port (d) and a third valve port (e), wherein the first valve port (c) is connected to the blow-by gas outlet (a), the second valve port (d) is connected to the air inlet (b), and the first valve port (c) and the third valve port (e) of the first valve body can be selectively connected; A supercharger (3), the supercharger (3) being provided with a supercharger inlet (f) and a supercharger outlet (g), the supercharger outlet (g) being in communication with the air inlet (b); A boost circuit, one end of which is connected to the inlet of the supercharger (f), and the other end of which is connected to the outlet of the supercharger (g); wherein The third valve port (e) of the first valve body is connected to the boost circuit.

2. The engine according to claim 1, characterized in that Also includes: A second valve body (4), the second valve body (4) is arranged in the boost circuit and has a second valve body first valve port (h), a second valve body second valve port (i) and a second valve body third valve port (j), the second valve body first valve port (h) is connected to the supercharger outlet (g), the second valve body second valve port (i) is connected to the supercharger inlet (f), the second valve body third valve port (j) is connected to the first valve body third valve port (e), the second valve body second valve port (i) is connected to the second valve body third valve port (j), the second valve body second valve port (i) is connected to the second valve body third valve port (j), and the second valve body second valve port (i) and the second valve body first valve port (h) can be selectively connected.

3. The engine according to claim 2, characterized in that The second valve body (4) is constructed as a Venturi structure and is suitable for generating negative pressure at the third valve port (j) of the second valve body to suck the blow-by gas when the first valve port (h) of the second valve body is connected to the second valve port (i) of the second valve body.

4. The engine according to claim 3, characterized in that The second valve body (4) comprises a first tubular cavity section (41), a second tubular cavity section (42) and a third tubular cavity section (43) which are connected in sequence, and the flow area of ​​the first tubular cavity section (41) gradually decreases along the direction from the first tubular cavity section (41) to the second tubular cavity section (42); and the flow area of ​​the third tubular cavity section (43) gradually increases along the direction from the second tubular cavity section (42) to the third tubular cavity section (43); in The end of the first tubular cavity section (41) facing away from the second tubular cavity section (42) is formed with a first valve port (h) of the second valve body; The end of the third tubular cavity section (43) facing away from the second tubular cavity section (42) is formed with a second valve port (i) of the second valve body; The second tubular cavity section (42) is formed with a third valve port (j) of the second valve body.

5. The engine according to claim 1, characterized in that The diameter of the second valve port (d) of the first valve body is d1, and the diameter of the third valve port (e) of the first valve body is d2, and they satisfy: 1 / 2≤d1 / d2≤2 / 3.

6. The engine according to claim 5, characterized in that The diameter of the second valve port (d) of the first valve body is d1, and satisfies: 9mm≤d1≤10mm.

7. The engine according to claim 5, characterized in that The diameter of the third valve port (e) of the first valve body is d2 and satisfies: 15mm≤d2≤18mm.

8. The engine according to claim 1, characterized in that The first valve body (2) is provided with a diaphragm for controlling the selective conduction between the first valve port (c) of the first valve body and the third valve port (e) of the first valve body, and the diaphragm is provided with an air supply hole.

9. The engine according to claim 8, characterized in that The cross-sectional area of ​​the diaphragm is s1, and the cross-sectional area of ​​the air replenishing hole is s2, and they satisfy: 1 / 10≤s2 / s1≤1 / 5.

10. The engine according to claim 9, characterized in that The diameter of the air supply hole is d3 and satisfies: 4mm≤d3≤8mm.

11. The engine according to claim 1, characterized in that Also includes: An oil-gas separator (5), the oil-gas separator (5) being respectively connected to the blow-by gas outlet (a) and the first valve port (c) of the first valve body.

12. The engine according to claim 1, characterized in that Also includes: An air filter (6), wherein the inlet of the air filter (6) is connected to the outside atmosphere, and the outlet of the air filter (6) is connected to the inlet (f) of the supercharger.

13. A powertrain, characterized in that: Comprising an engine (1000) according to any one of claims 1-12.

14. A vehicle, characterized in that: A powertrain according to claim 13 or an engine (1000) according to any one of claims 1-12.

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