Engine cylinder cover assembly, engine, power assembly and vehicle

Abstract

The utility model relates to an engine cylinder cover assembly, an engine, a power assembly and a vehicle. The engine cylinder cover assembly comprises a waste gas channel, a waste gas cooling part and a flow control valve, the waste gas cooling part is a part, adjacent to the waste gas channel, of a cylinder cover cooling sleeve, and the waste gas cooling part is used for circulating a cooling medium to exchange heat with waste gas in the waste gas channel. The flow control valve is connected with the waste gas cooling part and used for adjusting the flow of the cooling medium in the waste gas cooling part. The cooling medium in the cylinder cover cooling sleeve can be used for cooling waste gas, the flow of the cooling medium in the waste gas cooling part can be controlled through the flow control valve, and therefore the cooling temperature of the waste gas is adjusted according to the working condition of an engine.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle engines, and in particular, to an engine cylinder head assembly, an engine, a powertrain, and a vehicle. Background Art

[0002] In order to reduce the emission of nitrogen oxides, an EGR (Exhaust Gas Recirculation) system is usually adopted to send the exhaust gas discharged from the engine back to the intake system.

[0003] In the related art, due to the high exhaust temperature of the engine, a separate EGR cooler needs to be provided in the EGR pipeline to cool the exhaust gas, resulting in a large number of complex EGR system pipelines, poor cooling effect of the EGR system, and the problem that the cooling temperature of the exhaust gas cannot be well adapted to the working conditions of the engine. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide an engine cylinder head assembly, an engine, a powertrain, and a vehicle to solve the above technical problems.

[0005] To achieve the above purpose, as the first aspect of the present disclosure, there is provided an engine cylinder head assembly, including:

[0006] An exhaust gas passage;

[0007] An exhaust gas cooling part, which is a part of the cylinder head cooling jacket adjacent to the exhaust gas passage, and the exhaust gas cooling part is used for circulating a cooling medium to exchange heat with the exhaust gas in the exhaust gas passage;

[0008] A flow control valve, connected to the exhaust gas cooling part and used to adjust the flow rate of the cooling medium in the exhaust gas cooling part.

[0009] Optionally, the inlet of the flow control valve is communicated with one end of the exhaust gas cooling part, and the outlet of the flow control valve is communicated with the other end of the exhaust gas cooling part.

[0010] Optionally, a first opening and a second opening are formed on the cylinder head cooling jacket, and the exhaust gas cooling part is located between the first opening and the second opening;

[0011] The engine cylinder head assembly further includes a first cooling medium passage and a second cooling medium passage. One end of the first cooling medium passage is communicated with the first opening, the other end of the first cooling medium passage is communicated with the inlet of the flow control valve, one end of the second cooling medium passage is communicated with the second opening, and the other end of the second cooling medium passage is communicated with the outlet of the flow control valve.

[0012] Optionally, the first cooling medium channel and / or the second cooling medium channel are adjacent to at least a part of the exhaust gas channel, so that the cooling medium in the first cooling medium channel and / or the cooling medium in the second cooling medium channel can exchange heat with the exhaust gas in at least a part of the exhaust gas channel.

[0013] Optionally, the exhaust gas cooling part, the first cooling medium channel and the second cooling medium channel enclose a heat exchange area, and at least a part of the exhaust gas channel is located in the heat exchange area.

[0014] Optionally, the exhaust gas channel includes an intake section, a heat exchange section and an exhaust section that are connected in sequence. One end of the intake section away from the heat exchange section is the inlet of the exhaust gas channel, and one end of the exhaust section away from the heat exchange section is the outlet of the exhaust gas channel. The heat exchange section is adjacent to the exhaust gas cooling part.

[0015] Optionally, the flow direction of the exhaust gas in the heat exchange section is opposite to the flow direction of the cooling medium in the exhaust gas cooling part.

[0016] Optionally, the engine cylinder head assembly further includes a cylinder head body. The cylinder head cooling jacket and the exhaust gas channel are both provided on the cylinder head body, and the flow control valve is installed on the cylinder head body.

[0017] Optionally, the engine cylinder head assembly further includes an exhaust gas recirculation valve, and the exhaust gas recirculation valve is communicated with the exhaust gas channel.

[0018] As a second aspect provided by the present disclosure, the present disclosure provides an engine, including a cylinder block and the above-mentioned engine cylinder head assembly. The cylinder block has an exhaust port and an intake port. The inlet of the exhaust gas channel is communicated with the exhaust port, and the outlet of the exhaust gas channel is communicated with the intake port.

[0019] Optionally, the engine further includes a turbocharger, a first exhaust pipe and a second exhaust pipe. The turbocharger includes a turbine section;

[0020] The inlet of the first exhaust pipe is connected to the exhaust port, the outlet of the first exhaust pipe is connected to the inlet of the turbine section, and the inlet of the second exhaust pipe is connected to the outlet of the turbine section.

[0021] Optionally, a first interface is provided on the first exhaust pipe, and a second interface is provided on the second exhaust pipe. The first interface is connected to the inlet of the exhaust gas channel and can selectively conduct or cut off the connection with the inlet of the exhaust gas channel. The second interface is connected to the inlet of the exhaust gas channel and can selectively conduct or cut off the connection with the inlet of the exhaust gas channel.

[0022] Optionally, the engine further includes a third exhaust pipe, a fourth exhaust pipe, a fifth exhaust pipe, and a first reversing valve;

[0023] The inlet of the third exhaust pipe is connected to the first interface, the outlet of the third exhaust pipe is connected to port A of the first reversing valve, the inlet of the fourth exhaust pipe is connected to the second interface, the outlet of the fourth exhaust pipe is connected to port B of the first reversing valve, port C of the first reversing valve is connected to the inlet of the fifth exhaust pipe, and the outlet of the fifth exhaust pipe is connected to the inlet of the exhaust gas passage.

[0024] Optionally, the engine further includes a turbocharger, a first intake pipe, and a second intake pipe, and the turbocharger includes a compressor;

[0025] The inlet of the first intake pipe is used to communicate with the outside atmosphere, the outlet of the first intake pipe is connected to the inlet of the compressor, the inlet of the second intake pipe is connected to the outlet of the compressor, and the outlet of the second intake pipe is connected to the intake port.

[0026] Optionally, a third interface is provided on the first intake pipe, a fourth interface is provided on the second intake pipe, the outlet of the exhaust gas passage is connected to the third interface and can selectively conduct or cut off with the third interface, and the outlet of the exhaust gas passage is also connected to the fourth interface and can selectively conduct or cut off with the fourth interface.

[0027] Optionally, the engine further includes a third intake pipe, a fourth intake pipe, a fifth intake pipe, and a second reversing valve;

[0028] The outlet of the exhaust gas passage is connected to the inlet of the third intake pipe, the outlet of the third intake pipe is connected to port A of the second reversing valve, port B of the second reversing valve is connected to the inlet of the fourth intake pipe, the outlet of the fourth intake pipe is connected to the fourth interface, port C of the second reversing valve is connected to the inlet of the fifth intake pipe, and the outlet of the fifth intake pipe is connected to the third interface.

[0029] Optionally, the engine further includes an intercooler, the inlet of the intercooler is connected to the outlet of the compressor, and the outlet of the intercooler is connected to the inlet of the second intake pipe.

[0030] Optionally, the engine further includes a turbocharger, the turbocharger includes a turbine section and a compressor, and the engine has a first mode, a second mode, a third mode, and a fourth mode;

[0031] In the first mode, the exhaust port bypasses the turbine section and is connected to the inlet of the exhaust gas passage, and the outlet of the exhaust gas passage is connected to the intake port through the compressor;

[0032] In the second mode, the exhaust port bypasses the turbine section and is communicated with the inlet of the exhaust gas passage, and the outlet of the exhaust gas passage bypasses the compressor and is communicated with the inlet port.

[0033] In the third mode, the exhaust port is communicated with the inlet of the exhaust gas passage through the turbine section, and the outlet of the exhaust gas passage is communicated with the inlet port through the compressor.

[0034] In the fourth mode, the exhaust port is communicated with the inlet of the exhaust gas passage through the turbine section, and the outlet of the exhaust gas passage bypasses the compressor and is communicated with the inlet port.

[0035] As a third aspect provided by the present disclosure, the present disclosure provides a powertrain including the above-mentioned engine.

[0036] As a fourth aspect provided by the present disclosure, the present disclosure provides a vehicle including the above-mentioned engine or the above-mentioned powertrain.

[0037] Through the above technical solutions, an exhaust gas passage is integrated on the engine cylinder head assembly in the present disclosure. Since the exhaust gas cooling part of the cylinder head cooling jacket is adjacent to the exhaust gas passage, the present disclosure can utilize the cooling medium in the cylinder head cooling jacket to cool the exhaust gas, so that the exhaust gas can exchange heat with the cooling medium in the engine cylinder head assembly. Compared with the related art, there is no need to provide a separate EGR cooler to cool the exhaust gas, which simplifies the EGR system, reduces the pipeline complexity of the EGR system, reduces the installation space occupied by the EGR system on the vehicle, and improves the integration degree of the engine.

[0038] Moreover, since the engine cylinder head assembly further includes a flow control valve, the flow rate and flow velocity of the cooling medium in the exhaust gas cooling part can be controlled through the flow control valve, so that the cooling temperature of the exhaust gas can be adjusted according to the working conditions of the engine, enabling the cooling temperature of the exhaust gas to better adapt to the working conditions of the engine. For example, when the engine is at a high speed, the flow rate of the cooling medium can be increased to enhance the cooling efficiency or cooling effect of the exhaust gas.

[0039] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0041] Figure 1 is a perspective view of a powertrain provided by an embodiment of the present disclosure;

[0042] Figure 2 is a perspective view of a powertrain provided by an embodiment of the present disclosure (different from Figure 1 the perspective);

[0043] Figure 3 is a partial sectional view of an engine cylinder head assembly provided by an embodiment of the present disclosure;

[0044] Figure 4 is a schematic flow path diagram of an engine EGR system provided by an embodiment of the present disclosure;

[0045] Figure 5 is a schematic flow path diagram of an engine EGR system in a first mode provided by an embodiment of the present disclosure;

[0046] Figure 6 is a schematic flow path diagram of an engine EGR system in a second mode provided by an embodiment of the present disclosure;

[0047] Figure 7 is a schematic flow path diagram of an engine EGR system in a third mode provided by an embodiment of the present disclosure;

[0048] Figure 8 is a schematic flow path diagram of an engine EGR system in a fourth mode provided by an embodiment of the present disclosure.

[0049] Explanation of Reference Numerals

[0050] 100 - engine cylinder head assembly; 200 - cylinder block; 10 - engine; 20 - electric drive assembly; 101 - exhaust port; 102 - intake port; 103 - first exhaust pipe; 1031 - first interface; 104 - second exhaust pipe; 1041 - second interface; 105 - turbine section; 106 - third exhaust pipe; 107 - fourth exhaust pipe; 108 - fifth exhaust pipe; 109 - first reversing valve; 110 - compressor; 114 - first intake pipe; 1141 - third interface; 115 - second intake pipe; 1151 - fourth interface; 116 - third intake pipe; 117 - fourth intake pipe; 118 - fifth intake pipe; 119 - second reversing valve; 120 - intercooler; 121 - turbocharger; 1 - cylinder head body; 11 - exhaust gas passage; 111 - intake section; 112 - heat exchange section; 113 - exhaust section; 12 - exhaust gas cooling section; 13 - cylinder head cooling jacket; 131 - first opening; 132 - second opening; 14 - first cooling medium passage; 15 - second cooling medium passage; 16 - heat exchange area; 2 - flow control valve; 3 - exhaust gas recirculation valve. Detailed Embodiment

[0051] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0052] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" are usually defined based on the normal driving state of the vehicle. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present disclosure. "Inner" and "outer" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present disclosure, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "connected", "linked", "installed" 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 directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0054] As a first aspect of the present disclosure, as Figure 1 and Figure 3 shown, the present disclosure provides an engine cylinder head assembly 100, including an exhaust gas passage 11, an exhaust gas cooling part 12, and a flow control valve 2. Among them, the exhaust gas cooling part 12 is a part of the cylinder head cooling jacket 13 adjacent to the exhaust gas passage 11, and the exhaust gas cooling part 12 is used for circulating a cooling medium to exchange heat with the exhaust gas in the exhaust gas passage 11. The flow control valve 2 is connected to the exhaust gas cooling part 12 and is used to adjust the flow rate of the cooling medium in the exhaust gas cooling part 12.

[0055] Through the above technical solution, the present disclosure integrates the exhaust gas passage 11 on the engine cylinder head assembly 100. Since the exhaust gas cooling part 12 of the cylinder head cooling jacket 13 is adjacent to the exhaust gas passage 11, the present disclosure can use the cooling medium in the cylinder head cooling jacket 13 to cool the exhaust gas, so that the exhaust gas can exchange heat with the cooling medium in the engine cylinder head assembly 100. Compared with the related art, there is no need to set up a separate EGR cooler to cool the exhaust gas, which simplifies the EGR system, reduces the pipeline complexity of the EGR system, reduces the installation space occupied by the EGR system on the vehicle, and improves the integration of the engine.

[0056] Moreover, since the engine cylinder head assembly 100 further includes a flow control valve 2, the flow rate and velocity of the cooling medium in the exhaust gas cooling part 12 can be controlled by the flow control valve 2, so that the cooling temperature of the exhaust gas can be adjusted according to the operating conditions of the engine 10, enabling the cooling temperature of the exhaust gas to better adapt to the operating conditions of the engine. For example, when the engine 10 is at high speed, the flow rate of the cooling medium can be increased to enhance the cooling efficiency or effect of the exhaust gas.

[0057] Here, it should be noted that the above exhaust gas cooling part 12 can be a part of the overall structure of the cylinder head cooling jacket 13 or the entire structure of the cylinder head cooling jacket 13, and the present disclosure does not limit this. In addition, it can be understood that the exhaust gas comes from the exhaust of the engine 10. Therefore, the inlet of the exhaust gas passage 11 can be connected to the exhaust port 101 on the engine 10, and the outlet of the exhaust gas passage 11 can be connected to the intake port 102 on the engine 10.

[0058] Optionally, the engine cylinder head assembly 100 may further include a cylinder head body 1, the cylinder head cooling jacket 13 and the exhaust gas passage 11 are both provided on the cylinder head body 1, and the flow control valve 2 is installed on the cylinder head body 1.

[0059] The above flow control valve 2 can have any appropriate connection relationship with the exhaust gas cooling part 12 to achieve the regulation of the flow rate of the cooling medium in the exhaust gas cooling part 12, as long as the flow control valve 2 can regulate the flow rate of the cooling medium in the exhaust gas cooling part 12.

[0060] For example, in an embodiment provided by the present disclosure, as Figure 3 shown, the inlet of the flow control valve 2 is connected to one end of the exhaust gas cooling part 12, and the outlet of the flow control valve 2 is connected to the other end of the exhaust gas cooling part 12, that is, the flow control valve 2 and the exhaust gas cooling part 12 are connected in series to form a loop. By adjusting the opening degree of the flow control valve 2, the flow rate and velocity of the cooling medium flowing into the exhaust gas cooling part 12 can be adjusted.

[0061] In another embodiment provided by the present disclosure, the outlet of the flow control valve 2 can be connected to the inlet of the exhaust gas cooling part 12, and the inlet of the flow control valve 2 can be communicated with the part of the cylinder head cooling jacket 13 that is connected to the exhaust gas cooling part 12, that is, the flow control valve 2 and the exhaust gas cooling part 12 are connected in series to form a flow path, thereby controlling the flow rate and velocity of the cooling medium entering the exhaust gas cooling part 12.

[0062] To facilitate the connection between the flow control valve 2 and the exhaust gas cooling part 12, optionally, as Figure 3As shown, a first opening 131 and a second opening 132 are provided on the cylinder head cooling jacket 13, and an exhaust gas cooling portion 12 is located between the first opening 131 and the second opening 132. A first cooling medium channel 14 and a second cooling medium channel 15 are further provided on the cylinder head body 1. One end of the first cooling medium channel 14 is communicated with the first opening 131, and the other end of the first cooling medium channel 14 is communicated with the inlet of the flow control valve 2. One end of the second cooling medium channel 15 is communicated with the second opening 132, and the other end of the second cooling medium channel 15 is communicated with the outlet of the flow control valve 2. By providing the first cooling medium channel 14 and the second cooling medium channel 15 on the cylinder head body 1, the first opening 131 of the exhaust gas cooling portion 12 is communicated with the inlet of the flow control valve 2, and the second opening 132 of the exhaust gas cooling portion 12 is communicated with the outlet of the flow control valve 2, so as to form a circulatable loop between the exhaust gas cooling portion 12 and the flow control valve 2, and the flow control valve 2 controls the flow rate of the cooling medium in this flow path, thereby completing the cooling of the exhaust gas in the exhaust gas channel 11.

[0063] Optionally, the flow control valve 2 can be directly connected to the first cooling medium channel 14 and the second cooling medium channel 15, or can be connected to the first cooling medium channel 14 and the second cooling medium channel 15 through a connecting pipe. The present disclosure does not limit this.

[0064] Optionally, the first cooling medium channel 14 and the second cooling medium channel 15 can be provided on the cylinder head body 1.

[0065] To further improve the cooling efficiency, optionally, as Figure 3 shown, the first cooling medium channel 14 and / or the second cooling medium channel 15 are adjacent to at least a part of the exhaust gas channel 11, so that the cooling medium in the first cooling medium channel 14 and / or the cooling medium in the second cooling medium channel 15 can exchange heat with the exhaust gas in at least a part of the exhaust gas channel 11. While the exhaust gas cooling portion 12 is adjacent to at least a part of the exhaust gas channel 11 and can exchange heat with the exhaust gas, making the first cooling medium channel 14 and / or the second cooling medium channel 15 adjacent to at least a part of the exhaust gas channel 11 can enable the first cooling medium channel 14 and / or the second cooling medium channel 15 to also cool the exhaust gas in at least a part of the exhaust gas channel 11, further improving the cooling efficiency of the exhaust gas.

[0066] Optionally, as Figure 3As shown in the figure, the exhaust gas cooling part 12, the first cooling medium channel 14 and the second cooling medium channel 15 enclose a heat exchange area 16, and at least part of the exhaust gas channel 11 is located in the heat exchange area 16. The heat exchange area 16 enclosed by the exhaust gas cooling part 12, the first cooling medium channel 14 and the second cooling medium channel 15 can form a heat exchange space. As long as at least part of the exhaust gas channel 11 is located in this space, heat exchange with the cooling medium can be carried out, thereby further increasing the heat exchange contact area between the cooling medium and the exhaust gas and improving the cooling efficiency of the exhaust gas.

[0067] Optionally, as Figure 3 shown, the exhaust gas channel 11 includes an intake section 111, a heat exchange section 112 and an exhaust section 113 that are connected in sequence. One end of the intake section 111 away from the heat exchange section 112 is the inlet of the exhaust gas channel 11, and one end of the exhaust section 113 away from the heat exchange section 112 is the outlet of the exhaust gas channel 11. The heat exchange section 112 is adjacent to the exhaust gas cooling part 12. The exhaust gas discharged from the exhaust port 101 on the engine 10 enters the exhaust gas channel 11 through the intake section 111, exchanges heat with the cooling medium in the exhaust gas cooling part 12 in the heat exchange section 112, and then is discharged through the exhaust section 113.

[0068] Optionally, the flow direction of the exhaust gas in the heat exchange section 112 is opposite to the flow direction of the cooling medium in the exhaust gas cooling part 12. Since the exhaust gas cooling part 12 and the heat exchange section 112 are arranged adjacent to each other, and the flow direction of the exhaust gas in the heat exchange section 112 is opposite to the flow direction of the cooling medium in the exhaust gas cooling part 12, the part with the largest temperature difference between the exhaust gas and the cooling medium can always be in contact, thereby increasing the heat exchange efficiency between the exhaust gas and the cooling medium.

[0069] To control the amount of exhaust gas entering the exhaust gas channel 11, optionally, as Figure 3 shown, the engine cylinder head assembly 100 may further include an exhaust gas recirculation valve 3, and the exhaust gas recirculation valve 3 is communicated with the exhaust gas channel 11. The exhaust gas recirculation valve 3 can control the amount of exhaust gas entering the engine 10 from the exhaust gas channel 11 to improve the fuel efficiency on the premise of ensuring the normal operation of the engine 10.

[0070] Optionally, the inlet of the exhaust gas recirculation valve 3 can be communicated with the exhaust port 101 on the engine 10, and the outlet of the exhaust gas recirculation valve 3 is communicated with the inlet of the exhaust gas channel 11, so that the exhaust gas recirculation valve 3 can control the amount of exhaust gas entering the exhaust gas channel 11, thereby further controlling the amount of exhaust gas entering the engine 10 from the exhaust gas channel 11. Or, the inlet of the exhaust gas recirculation valve 3 can be communicated with the outlet of the exhaust gas channel 11, and the outlet of the exhaust gas recirculation valve 3 can be communicated with the intake port 102 on the engine 10, so that the amount of exhaust gas entering the engine 10 from the exhaust gas channel 11 can be controlled by the exhaust gas recirculation valve 3.

[0071] Optionally, the exhaust gas recirculation valve 3 can be installed on the cylinder head body 1.

[0072] As the second aspect provided by the present disclosure, as Figures 1 to 8 shown, the present disclosure provides an engine 10, including a cylinder block 200 and the above-mentioned engine cylinder head assembly 100. The cylinder block 200 has an exhaust port 101 and an intake port 102. The inlet of the exhaust gas passage 11 of the engine cylinder head assembly 100 is communicated with the exhaust port 101, and the outlet of the exhaust gas passage 11 is communicated with the intake port 102.

[0073] Optionally, as Figure 4 shown, the engine 10 further includes a turbocharger 121, a first exhaust pipe 103, and a second exhaust pipe 104. The turbocharger 121 includes a turbine section 105. The inlet of the first exhaust pipe 103 is connected to the exhaust port 101, the outlet of the first exhaust pipe 103 is connected to the inlet of the turbine section 105, and the inlet of the second exhaust pipe 104 is connected to the outlet of the turbine section 105.

[0074] The turbine section 105 of the turbocharger 121 includes a volute and a turbine disposed in the volute. The exhaust gas discharged from the engine 10 can drive the turbine to rotate, and the turbine can drive the impeller in the compressor 110 of the turbocharger 121 to rotate, compress the air, and make the pressurized air enter the engine 10.

[0075] Generally, the main purpose of the EGR system working is to make the exhaust gas recirculation amount reach an ideal state in each working condition of the engine 10, so that the combustion process of the fuel is always in an ideal situation, and finally ensure that the proportion of pollutants in the combustion emissions is at a low level. Therefore, the EGR system does not work in all working conditions of the engine 10, and only works when it is necessary to reduce the pollutant level. For example, during starting, warm-up, idling, and other low-load conditions, the temperature of the engine 10 cooling medium and the combustion temperature are relatively low, and the EGR system does not work. Under medium-load working conditions, the nitrogen oxide emission concentration is relatively high, and the EGR rate is generally between 10% and 20%. Under high-load working conditions, the amount of nitrogen oxides generated is relatively small. In order to ensure the power output of the engine 10, the EGR rate is usually relatively low.

[0076] In order to achieve the adjustment of the EGR rate to adapt to different working conditions of the engine 10, optionally, a first interface 1031 is provided on the first exhaust pipe 103, a second interface 1041 is provided on the second exhaust pipe 104. The first interface 1031 is connected to the inlet of the exhaust gas passage 11 and can selectively conduct or cut off the connection with the inlet of the exhaust gas passage 11. The second interface 1041 is connected to the inlet of the exhaust gas passage 11 and can selectively conduct or cut off the connection with the inlet of the exhaust gas passage 11.

[0077] Since the turbine section 105 of the turbocharger 121 is driven by exhaust gas, the pressure of the exhaust gas passing through the turbine section 105 will decrease to a certain extent. The outlet of the first exhaust pipe 103 is connected to the inlet of the turbine section 105, and the first interface 1031 is provided on the first exhaust pipe 103. Therefore, the exhaust gas entering the first interface 1031 is the exhaust gas that has not entered the turbine section 105 and is still in a relatively high-pressure state. At this time, the exhaust gas flowing into the exhaust gas passage 11 from the first interface 1031 will also maintain a relatively high pressure, thereby increasing the flow rate of the exhaust gas in the exhaust gas passage 11 and improving the efficiency of the exhaust gas recovered per unit time.

[0078] Since the inlet of the second exhaust pipe 104 is connected to the outlet of the turbine section 105, the exhaust gas passing through the turbine section 105 flows into the second exhaust pipe 104. The pressure of the exhaust gas in the second exhaust pipe 104 is relatively low. The second interface 1041 is provided on the second exhaust pipe 104. Therefore, the exhaust gas flowing out from the second interface 1041 has a relatively low pressure. The exhaust gas with a relatively low pressure enters the exhaust gas passage 11, which can meet the demand for exhaust gas recovery when the engine 10 is running at a relatively low speed.

[0079] Optionally, as Figure 4 shown, the engine 10 further includes a third exhaust pipe 106, a fourth exhaust pipe 107, a fifth exhaust pipe 108, and a first reversing valve 109. The inlet of the third exhaust pipe 106 is connected to the first interface 1031, the outlet of the third exhaust pipe 106 is connected to port A of the first reversing valve 109, the inlet of the fourth exhaust pipe 107 is connected to the second interface 1041, the outlet of the fourth exhaust pipe 107 is connected to port B of the first reversing valve 109, port C of the first reversing valve 109 is connected to the inlet of the fifth exhaust pipe 108, and the outlet of the fifth exhaust pipe 108 is connected to the inlet of the exhaust gas passage 11.

[0080] Through the third exhaust pipe 106, the fourth exhaust pipe 107, and the first reversing valve 109, the exhaust gas flowing in through the first interface 1031 or the exhaust gas flowing in through the second interface 1041 can be conveyed into the fifth exhaust pipe 108, and then input into the exhaust gas passage 11 through the outlet of the fifth exhaust pipe 108. In this way, according to different operating conditions of the engine 10, the first reversing valve 109 can be used to select the high or low pressure of the exhaust gas entering the exhaust gas passage 11, so that the combustion process of the engine 10 is always in an ideal state.

[0081] Optionally, as Figure 4As shown, the engine 10 further includes a turbocharger 121, a first intake pipe 114, and a second intake pipe 115. The turbocharger 121 includes a compressor 110, and the compressor 110 is drivingly connected to the turbine section 105. The inlet of the first intake pipe 114 is used to communicate with the outside atmosphere, the outlet of the first intake pipe 114 is connected to the inlet of the compressor 110, the inlet of the second intake pipe 115 is connected to the outlet of the compressor 110, and the outlet of the second intake pipe 115 is connected to the intake port 102.

[0082] Since the exhaust gas passage 11 in the cylinder head body 1 is adjacent to the exhaust gas cooling section 12, the exhaust gas flowing through the exhaust gas passage 11 can exchange heat with the exhaust gas cooling section 12. Therefore, the exhaust gas flowing out of the outlet of the exhaust gas passage 11 is cooled exhaust gas. The outlet of the exhaust gas passage 11 is connected to the intake port 102, and the exhaust gas flowing out of the outlet of the exhaust gas passage 11 can be mixed with the air entering the first intake pipe 114 or the second intake pipe 115 from the outside atmosphere and then enter the engine 10 together.

[0083] Optionally, in order to adjust the EGR rate to adapt to different operating conditions of the engine 10, a third interface 1141 is provided on the first intake pipe 114, a fourth interface 1151 is provided on the second intake pipe 115, the outlet of the exhaust gas passage 11 is connected to the third interface 1141 and can be selectively conducted or cut off from the third interface 1141, and the outlet of the exhaust gas passage 11 is also connected to the fourth interface 1151 and can be selectively conducted or cut off from the fourth interface 1151.

[0084] Since the third interface 1141 is provided on the first intake pipe 114 and the outlet of the first intake pipe 114 is in communication with the inlet of the compressor 110, the cooled exhaust gas discharged from the exhaust gas passage 11 can enter the first intake pipe 114 through the third interface 1141, enter the compressor 110 together with the air entering the first intake pipe 114 from the outside atmosphere, and further increase the intake air volume by compressing the air to improve the combustion efficiency of the engine 10.

[0085] The fourth interface 1151 is provided on the second intake pipe 115, and the inlet of the second intake pipe 115 is in communication with the outlet of the compressor 110. The cooled exhaust gas discharged from the exhaust gas passage 11 can enter the second intake pipe 115 through the fourth interface 1151. Since the fresh air in the second intake pipe 115 has been supercharged by the compressor 110, it can enter the engine 10 together with the cooled exhaust gas.

[0086] Optionally, as Figure 4As shown, the engine 10 further includes a third intake pipe 116, a fourth intake pipe 117, a fifth intake pipe 118 and a second reversing valve 119. The outlet of the exhaust passage 11 is connected to the inlet of the third intake pipe 116, the outlet of the third intake pipe 116 is connected to the A port of the second reversing valve 119, the B port of the second reversing valve 119 is connected to the inlet of the fourth intake pipe 117, the outlet of the fourth intake pipe 117 is connected to the fourth interface 1151, the C port of the second reversing valve 119 is connected to the inlet of the fifth intake pipe 118, and the outlet of the fifth intake pipe 118 is connected to the third interface 1141.

[0087] Through the fourth intake pipe 117, the fifth intake pipe 118 and the second reversing valve 119, the exhaust gas flowing out through the exhaust passage 11 can be delivered to the fourth interface 1151 or the third interface 1141 through the third intake pipe 116 and after being reversing by the second reversing valve 119, so that the cooled exhaust gas is mixed with fresh air and re-enters the engine 10 through the fourth intake pipe 117 and the fifth intake pipe 118. In this way, according to different working conditions of the engine 10, the exhaust gas can be discharged into the first intake pipe 114 or the second intake pipe 115 through the second reversing valve 119, so as to control the proportion of the exhaust gas in the intake volume of the engine 10, so that the combustion process of the engine 10 can always be in a relatively ideal state under different working conditions.

[0088] like Figures 5 to 8 As shown, an exhaust gas exhaust pipeline is composed of a first exhaust pipe 103, a second exhaust pipe 104, a third exhaust pipe 106, a fourth exhaust pipe 107, a fifth exhaust pipe 108 and a first reversing valve 109, and an exhaust gas intake pipeline is composed of a first intake pipe 114, a second intake pipe 115, a third intake pipe 116, a fourth intake pipe 117, a fifth intake pipe 118 and a second reversing valve 119. The above-mentioned exhaust gas intake pipeline and exhaust gas exhaust pipeline can also have different combination modes to constitute an EGR circulation mode adapted to different operating conditions of the engine 10.

[0089] For example, Figure 5 As shown, in the first mode, on one side of the exhaust gas exhaust pipeline, the exhaust gas discharged from the first exhaust pipe 103 enters the first reversing valve 109 through the first interface 1031. At this time, the A port and the C port of the first reversing valve 109 are connected, and the exhaust gas enters the exhaust channel 11 through the fifth exhaust pipe 108. On one side of the exhaust gas intake pipeline, the cooled exhaust gas discharged from the exhaust channel 11 enters the second reversing valve 119 through the third intake pipe 116. At this time, the A port and the C port of the second reversing valve 119 are connected, and the exhaust gas enters the first intake pipe 114 through the fifth intake pipe 118 through the third interface 1141, and then further enters the engine 10 through the first intake pipe 114.

[0090] In this mode, the exhaust gas entering from the first interface 1031 does not drive the turbine unit 105 to rotate, and enters the exhaust passage 11 with a relatively high pressure; while the exhaust gas located on one side of the exhaust gas intake pipe has a relatively low pressure because the fresh air has not yet entered the compressor 110, and the pressure difference between the exhaust gas exhaust pipe and the exhaust gas intake pipe is relatively large, thereby increasing the flow speed of the exhaust gas in the exhaust passage 11. At this time, the EGR system has a high working efficiency, can adapt to the medium load condition of the engine 10, and reduce the emission of nitrogen oxides.

[0091] like Figure 6 As shown, in the second mode, on the exhaust gas exhaust pipe side, the flow path of the exhaust gas before entering the exhaust gas channel 11 is the same as the first circulation mode. On the exhaust gas intake pipe side, the cooled exhaust gas discharged from the exhaust gas channel 11 enters the second reversing valve 119 through the third intake pipe 116. At this time, the A port and the B port of the second reversing valve 119 are connected, and the exhaust gas enters the second intake pipe 115 through the fourth interface 1151 via the fourth intake pipe 117, and then enters the engine 10 through the second intake pipe 115.

[0092] In this mode, the exhaust gas entering from the first interface 1031 does not drive the turbine part 105 to rotate, and thus enters the exhaust passage 11 with a relatively high pressure. The exhaust gas on one side of the exhaust gas intake pipe has a relatively high pressure because the fresh air has been pressurized by the compressor 110. The pressure difference between the exhaust gas exhaust pipe and the exhaust gas intake pipe is relatively small, which can adapt to the low-load or high-load operating conditions of the engine 10 and improve the power performance of the engine 10.

[0093] like Figure 7 As shown, in the third mode, on one side of the exhaust gas exhaust pipeline, the exhaust gas discharged from the first exhaust pipe 103 enters the first reversing valve 109 through the second interface 1041 on the second exhaust pipe 104. At this time, the B port and the C port of the first reversing valve 109 are connected, and the exhaust gas enters the exhaust channel 11 through the fourth exhaust pipe 107 and the fifth exhaust pipe 108. On one side of the exhaust gas intake pipeline, the cooled exhaust gas discharged from the exhaust channel 11 enters the second reversing valve 119 through the third intake pipe 116. At this time, the A port and the C port of the second reversing valve 119 are connected, and the exhaust gas enters the first intake pipe 114 through the third interface 1141 through the fifth intake pipe 118, and then enters the engine 10 through the first intake pipe 114.

[0094] In this mode, since the kinetic energy of the exhaust gas entering from the second interface 1041 has been used to drive the rotation of the turbine section 105, the pressure of the exhaust gas entering the exhaust gas passage 11 is relatively low. For the exhaust gas on the exhaust gas inlet pipeline side, since fresh air has not yet entered the compressor 110, the pressure is relatively small, and the pressure difference between the exhaust gas exhaust pipeline and the exhaust gas inlet pipeline is small, which can adapt to the working conditions of the engine 10 at low load or high load, and improve the power performance of the engine 10.

[0095] As Figure 8 shown, in the fourth mode, the flow path of the exhaust gas before entering the exhaust gas passage 11 is the same as that in the third cycle mode; on the exhaust gas inlet pipeline side, the cooled exhaust gas discharged from the exhaust gas passage 11 enters the second reversing valve 119 through the third inlet pipe 116. At this time, the A port and the B port of the second reversing valve 119 are conducted, and the exhaust gas enters the second inlet pipe 115 through the fourth inlet pipe 117 and the fourth interface 1151, and thus enters the engine 10 through the second inlet pipe 115.

[0096] In this mode, since the kinetic energy of the exhaust gas entering from the second interface 1041 has been used to drive the rotation of the turbine section 105, the pressure of the exhaust gas entering the exhaust gas passage 11 is relatively low; for the exhaust gas on the exhaust gas inlet pipeline side, since the fresh air has been pressurized by the compressor 110, the pressure is relatively large, and the pressure difference between the exhaust gas exhaust pipeline and the exhaust gas inlet pipeline is large. However, the degree of pressurization of the compressor 110 is relatively small compared with the pressure during exhaust gas emission, and it cannot meet the requirements of the engine 10 for the circulation speed of the EGR system under medium load conditions. Therefore, it can adapt to the working conditions of the engine 10 at low load or high load, and improve the power performance of the engine 10.

[0097] It can be understood that the present disclosure is not limited to specifically forming the exhaust gas exhaust pipeline through the first exhaust pipe 103, the second exhaust pipe 104, the third exhaust pipe 106, the fourth exhaust pipe 107, the fifth exhaust pipe 108 and the first reversing valve 109 and forming the exhaust gas inlet pipeline through the first inlet pipe 114, the second inlet pipe 115, the third inlet pipe 116, the fourth inlet pipe 117, the fifth inlet pipe 118 and the second reversing valve 119 to realize the above modes for adapting to different working conditions of the engine 10, as long as the above modes for adapting to different working conditions of the engine 10 can be realized.

[0098] For example, the engine 10 may include a turbocharger 121, the turbocharger 121 includes a turbine section 105 and a compressor 110, and the engine has a first mode, a second mode, a third mode and a fourth mode.

[0099] In the first mode, the exhaust port 101 bypasses the turbine section 105 and is connected to the inlet of the exhaust gas passage 11, and the outlet of the exhaust gas passage 11 is connected to the intake port 102 through the compressor 110. In this mode, as Figure 5As shown, the exhaust gas discharged from the exhaust port 101 enters the exhaust gas passage 11 without flowing through the turbine section 105. The exhaust gas discharged from the exhaust gas passage 11 is mixed with fresh air and then enters the compressor 110 together.

[0100] In the second mode, the exhaust port 101 bypasses the turbine section 105 and is connected to the inlet of the exhaust gas passage 11, and the outlet of the exhaust gas passage 11 bypasses the compressor 110 and is connected to the intake port 102. In this mode, as Figure 6 shown, the exhaust gas discharged from the exhaust port 101 enters the exhaust gas passage 11 without flowing through the turbine section 105. The exhaust gas discharged from the exhaust gas passage 11 is mixed with the fresh air pressurized by the compressor 110 and then enters the cylinder block 200 of the engine 10.

[0101] In the third mode, the exhaust port 101 is connected to the inlet of the exhaust gas passage 11 through the turbine section 105, and the outlet of the exhaust gas passage 11 is connected to the intake port 102 through the compressor 110. In this mode, as Figure 7 shown, the exhaust gas discharged from the exhaust port 101 flows through the turbine section 105 and then enters the exhaust gas passage 11. The exhaust gas discharged from the exhaust gas passage 11 is mixed with fresh air and then enters the compressor 110 together.

[0102] In the fourth mode, the exhaust port 101 is connected to the inlet of the exhaust gas passage 11 through the turbine section 105, and the outlet of the exhaust gas passage 11 bypasses the compressor 110 and is connected to the intake port 102. In this mode, as Figure 8 shown, the exhaust gas discharged from the exhaust port 101 flows through the turbine section 105 and then enters the exhaust gas passage 11. The exhaust gas discharged from the exhaust gas passage 11 is mixed with the fresh air pressurized by the compressor 110 and then enters the cylinder block 200 of the engine 10.

[0103] It can be understood that the above-mentioned connection between the exhaust port 101 bypassing the turbine section 105 and the inlet of the exhaust gas passage 11 means that the exhaust gas discharged from the exhaust port 101 enters the inlet of the exhaust gas passage 11 without flowing through the turbine section 105. The above-mentioned connection between the outlet of the exhaust gas passage 11 bypassing the compressor 110 and the intake port 102 means that the exhaust gas discharged from the outlet of the exhaust gas passage 11 enters the intake port 102 without flowing through the compressor 110.

[0104] Optionally, as Figure 4As shown, the engine 10 further includes an intercooler 120. The inlet of the intercooler 120 is connected to the outlet of the compressor 110, and the outlet of the intercooler 120 is connected to the inlet of the second intake pipe 115. After the air pressurized by the compressor 110 enters the intercooler 120, it is cooled and its temperature is reduced inside the intercooler 120. The cooled air then enters the engine 10 through the second intake pipe 115. Among them, the intercooler 120 is located downstream of the third interface 1141. After the exhaust gas and fresh air are pressurized by the compressor 110, they then enter the intercooler 120 for cooling. The lower intake air temperature helps to improve the combustion efficiency and makes the engine 10 operate more economically.

[0105] Optionally, as Figure 1 and Figure 2 shown, the turbine section 105 and the compressor 110 can be relatively spaced apart and located at the top of the engine cylinder head assembly 100. The first exhaust pipe 103 and the second exhaust pipe 104 can be arranged close to the turbine section 105 for easy connection to the turbine section 105, and the first intake pipe 114 and the second intake pipe 115 can be arranged close to the compressor 110 for easy connection to the compressor 110. The intercooler 120 is installed on the cylinder block 200 and is arranged close to the compressor 110 for easy connection to the second intake pipe 115. The exhaust gas recirculation valve 3 and the flow control valve 2 can be located at the top of the cylinder head body 1 and close to the edge of the cylinder head body 1 to leave installation space for structures such as the turbocharger 121.

[0106] Optionally, the first exhaust pipe 103 and the second exhaust pipe can be located on one side of the cylinder block 200, and the first intake pipe 114, the second intake pipe 115, and the intercooler 120 can be located on the other side of the cylinder block 200.

[0107] As a third aspect of the present disclosure, the present disclosure provides a powertrain including the above-mentioned engine 10.

[0108] Optionally, the above-mentioned powertrain can include an electric drive assembly 20, and the electric drive assembly 20 can include a drive motor, a speed reducer, etc.

[0109] Optionally, as Figure 2 shown, the electric drive assembly 20 can be arranged on the side of the cylinder block 200 facing away from the engine cylinder head assembly 100. For example, the engine cylinder head assembly 100 can be arranged on the top of the cylinder block 200, and the electric drive assembly 20 can be arranged at the bottom of the cylinder block 200.

[0110] As a fourth aspect of the present disclosure, the present disclosure provides a vehicle including the above-mentioned engine 10 or powertrain. Among them, the vehicle can be a hybrid vehicle or a gasoline-powered vehicle, and the present disclosure does not make any limitations in this regard.

[0111] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0112] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0113] Furthermore, any combination can be made among the various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An engine cylinder head assembly, characterized in that, Comprising: An exhaust gas passage; An exhaust gas cooling part, which is a part of the cylinder head cooling jacket adjacent to the exhaust gas passage. The cylinder head cooling jacket is provided with a first opening and a second opening, and the exhaust gas cooling part is between the first opening and the second opening; the exhaust gas cooling part is used for circulating a cooling medium to exchange heat with the exhaust gas in the exhaust gas passage; A flow control valve, connected to the exhaust gas cooling part and used for adjusting the flow rate of the cooling medium in the exhaust gas cooling part.

2. The engine cylinder head assembly according to claim 1, wherein, The inlet of the flow control valve communicates with one end of the exhaust gas cooling part, and the outlet of the flow control valve communicates with the other end of the exhaust gas cooling part.

3. The engine cylinder head assembly according to claim 2, wherein, The engine cylinder head assembly further includes a first cooling medium passage and a second cooling medium passage. One end of the first cooling medium passage communicates with the first opening, and the other end of the first cooling medium passage communicates with the inlet of the flow control valve. One end of the second cooling medium passage communicates with the second opening, and the other end of the second cooling medium passage communicates with the outlet of the flow control valve.

4. The engine cylinder head assembly according to claim 3, wherein The first cooling medium passage and / or the second cooling medium passage is adjacent to at least part of the exhaust gas passage, so that the cooling medium in the first cooling medium passage and / or the cooling medium in the second cooling medium passage can exchange heat with the exhaust gas in at least part of the exhaust gas passage.

5. The engine cylinder head assembly according to claim 4, wherein, The exhaust gas cooling part, the first cooling medium passage and the second cooling medium passage enclose a heat exchange area, and at least part of the exhaust gas passage is located in the heat exchange area.

6. The engine cylinder head assembly according to any one of claims 1-5, characterized in that, The exhaust gas passage includes an intake section, a heat exchange section and an exhaust section that are sequentially connected. One end of the intake section away from the heat exchange section is the inlet of the exhaust gas passage, and one end of the exhaust section away from the heat exchange section is the outlet of the exhaust gas passage. The heat exchange section is adjacent to the exhaust gas cooling part.

7. The engine cylinder head assembly according to claim 6, characterized in that, The flow direction of the exhaust gas in the heat exchange section is opposite to the flow direction of the cooling medium in the exhaust gas cooling part.

8. The engine cylinder head assembly according to any one of claims 1-5, characterized in that, The engine cylinder head assembly further includes a cylinder head body. The cylinder head cooling jacket and the exhaust gas passage are both arranged on the cylinder head body, and the flow control valve is installed on the cylinder head body.

9. The engine cylinder head assembly according to any one of claims 1-5, characterized in that, The engine cylinder head assembly further includes an exhaust gas recirculation valve, and the exhaust gas recirculation valve communicates with the exhaust gas passage.

10. An engine, characterized in that, Comprising a cylinder block and the engine cylinder head assembly according to any one of claims 1-9. The cylinder block has an exhaust port and an intake port. The inlet of the exhaust gas passage communicates with the exhaust port, and the outlet of the exhaust gas passage communicates with the intake port.

11. The engine according to claim 10, characterized in that, The engine further includes a turbocharger, a first exhaust pipe and a second exhaust pipe. The turbocharger includes a turbine part; The inlet of the first exhaust pipe is connected to the exhaust port, the outlet of the first exhaust pipe is connected to the inlet of the turbine part, and the inlet of the second exhaust pipe is connected to the outlet of the turbine part.

12. The engine according to claim 11, characterized in that, A first interface is provided on the first exhaust pipe, and a second interface is provided on the second exhaust pipe. The first interface is connected to the inlet of the exhaust gas passage and can selectively conduct or cut off the connection with the inlet of the exhaust gas passage. The second interface is connected to the inlet of the exhaust gas passage and can selectively conduct or cut off the connection with the inlet of the exhaust gas passage.

13. The engine according to claim 12, characterized in that, The engine further includes a third exhaust pipe, a fourth exhaust pipe, a fifth exhaust pipe, and a first reversing valve; The inlet of the third exhaust pipe is connected to the first interface, the outlet of the third exhaust pipe is connected to port A of the first reversing valve, the inlet of the fourth exhaust pipe is connected to the second interface, the outlet of the fourth exhaust pipe is connected to port B of the first reversing valve, port C of the first reversing valve is connected to the inlet of the fifth exhaust pipe, and the outlet of the fifth exhaust pipe is connected to the inlet of the exhaust gas passage.

14. The engine according to any one of claims 10 - 13, characterized in that, The engine further includes a turbocharger, a first intake pipe, and a second intake pipe. The turbocharger includes a compressor. The inlet of the first intake pipe is for communicating with the outside atmosphere, the outlet of the first intake pipe is connected to the inlet of the compressor, the inlet of the second intake pipe is connected to the outlet of the compressor, and the outlet of the second intake pipe is connected to the intake port.

15. The engine according to claim 14, characterized in that, A third interface is provided on the first intake pipe, and a fourth interface is provided on the second intake pipe. The outlet of the exhaust gas passage is connected to the third interface and can selectively conduct or cut off the connection with the third interface. The outlet of the exhaust gas passage is also connected to the fourth interface and can selectively conduct or cut off the connection with the fourth interface.

16. The engine according to claim 15, characterized in that, The engine further includes a third intake pipe, a fourth intake pipe, a fifth intake pipe, and a second reversing valve; The outlet of the exhaust gas passage is connected to the inlet of the third intake pipe, the outlet of the third intake pipe is connected to port A of the second reversing valve, port B of the second reversing valve is connected to the inlet of the fourth intake pipe, the outlet of the fourth intake pipe is connected to the fourth interface, port C of the second reversing valve is connected to the inlet of the fifth intake pipe, and the outlet of the fifth intake pipe is connected to the third interface.

17. The engine according to claim 14, characterized in that, The engine further includes an intercooler. The inlet of the intercooler is connected to the outlet of the compressor, and the outlet of the intercooler is connected to the inlet of the second intake pipe.

18. The engine according to claim 10, characterized in that, The engine further includes a turbocharger. The turbocharger includes a turbine section and a compressor. The engine has a first mode, a second mode, a third mode, and a fourth mode; In the first mode, the exhaust port bypasses the turbine section and is connected to the inlet of the exhaust gas passage, and the outlet of the exhaust gas passage is connected to the intake port through the compressor; In the second mode, the exhaust port bypasses the turbine section and is connected to the inlet of the exhaust gas passage, and the outlet of the exhaust gas passage bypasses the compressor and is connected to the intake port; In the third mode, the exhaust port is connected to the inlet of the exhaust gas passage through the turbine section, and the outlet of the exhaust gas passage is connected to the intake port through the compressor; In the fourth mode, the exhaust port is communicated with the inlet of the exhaust gas passage through the turbine section, and the outlet of the exhaust gas passage bypasses the compressor and is communicated with the intake port.

19. A powertrain, characterized in that, Comprising the engine according to any one of claims 10-18.

20. A vehicle, characterized in that, Comprising the engine according to any one of claims 10-18 or the powertrain according to claim 19.

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