Engine assembly and vehicle

Abstract

The engine assembly comprises an engine, a supercharger, a first balance weight structure and a second balance weight structure, the engine is connected with an air inlet pipeline, the supercharger is arranged on the air inlet pipeline and comprises a rotatable supercharger shaft, and the first balance weight structure and the second balance weight structure are arranged at the two axial ends of the supercharger shaft. According to the engine assembly, the first balance weight structure and the second balance weight structure are arranged at the two axial ends of the supercharger shaft, unbalance of the supercharger shaft can be reduced, in this way, vibration and noise of a supercharger can be effectively reduced, frictional wear caused by unbalance of the supercharger shaft is reduced, and the service life of the supercharger shaft is prolonged. And the stability and the reliability of the supercharger shaft can be improved, so that the operation stability of an engine assembly can be enhanced, and the working efficiency of an engine can be improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to an engine component and a vehicle. Background Art

[0002] The engine assembly passes the pressurized air into the engine through the supercharger, and fills the engine with enough air to fully burn the fuel in the engine. In the related art, the supercharger is limited by its own structure. The supercharger shaft of the supercharger will produce severe vibration and noise during the high-speed rotation process. This vibration will not only damage the supercharger itself, such as causing excessive wear of the supercharger shaft and shortening the service life of the supercharger, but also affect the stability of the operation of the engine assembly. Therefore, there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an engine assembly, which can reduce the imbalance of the supercharger shaft by arranging a first counterweight structure and a second counterweight structure at both ends of the axial direction of the supercharger shaft, so as to effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly and facilitating the improvement of the working efficiency of the engine.

[0004] The present invention also provides a vehicle comprising the engine assembly.

[0005] An engine assembly according to an embodiment of the first aspect of the present invention includes: an engine connected to an intake pipe; a supercharger, arranged in the intake pipe and including a rotatable supercharger shaft; a first counterweight structure and a second counterweight structure, arranged at both axial ends of the supercharger shaft.

[0006] According to the engine assembly of the embodiment of the present invention, the imbalance of the supercharger shaft can be reduced by arranging the first counterweight structure and the second counterweight structure at the axial ends of the supercharger shaft, which can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly and helping to improve the working efficiency of the engine.

[0007] According to some embodiments of the present invention, at least one of the first counterweight structure and the second counterweight structure is integrally formed with the supercharger shaft.

[0008] According to some embodiments of the present invention, at least one of the first counterweight structure and the second counterweight structure is detachably connected to the supercharger shaft.

[0009] According to some embodiments of the present invention, at least one of the first counterweight structure and the second counterweight structure is provided with a mounting hole, and the supercharger shaft passes through the mounting hole and is fixed relative to the supercharger shaft.

[0010] According to some embodiments of the present invention, the engine is connected to an exhaust pipe, and the supercharger includes an exhaust gas turbine and a compressor, the exhaust gas turbine and the compressor are both arranged on the supercharger shaft and arranged at intervals along the axial direction of the supercharger shaft, the compressor is arranged on the intake pipe, and the exhaust gas turbine is arranged on the exhaust pipe, and the exhaust gas discharged from the exhaust pipe is used to drive the exhaust gas turbine to move; wherein, the first counterweight structure is located on a side of the exhaust gas turbine away from the compressor, and the second counterweight structure is located on a side of the compressor away from the exhaust gas turbine.

[0011] According to some embodiments of the present invention, the torque relationship between the first counterweight structure, the second counterweight structure, the exhaust gas turbine and the compressor satisfies: m1*l1+m t *l t =m c *l c +m2*l2; wherein m1 is the mass of the first counterweight structure, l1 is the distance between the center of mass of the first counterweight structure and the central axis of the supercharger shaft, m2 is the mass of the second counterweight structure, l2 is the distance between the center of mass of the second counterweight structure and the central axis of the supercharger shaft, m c is the mass of the compressor, l c is the distance between the center of mass of the compressor and the central axis of the supercharger shaft, m t is the mass of the exhaust gas turbine, l t is the distance between the center of mass of the exhaust turbine and the central axis of the supercharger shaft.

[0012] According to some embodiments of the present invention, the relationship between the moments of inertia of the first counterweight structure, the second counterweight structure, the exhaust gas turbine and the compressor satisfies: m1*r1 2 +m2* r2 2 =m c * r c 2 +m t * r t 2 ; wherein m1 is the mass of the first counterweight structure, r1 is the distance between the center of mass of the first counterweight structure and the rotation axis of the supercharger shaft, m2 is the mass of the second counterweight structure, r2 is the distance between the center of mass of the second counterweight structure and the rotation axis of the supercharger shaft, m c is the mass of the compressor, rc is the distance between the rotation axis of the compressor and the supercharger shaft, m t is the mass of the exhaust gas turbine, r t is the distance between the rotational axis of the exhaust gas turbine and the supercharger shaft.

[0013] According to some embodiments of the present invention, there are two superchargers, which are respectively a first-stage supercharger and a second-stage supercharger, the compressor of the first-stage supercharger is a first compressor, the compressor of the second-stage supercharger is a second compressor, the first compressor and the second compressor are connected in series, and in the flow direction of the airflow in the intake pipe, the first compressor is located on the upstream side of the second compressor, the exhaust gas turbine of the first-stage supercharger is a first exhaust gas turbine, and the exhaust gas turbine of the second-stage supercharger is a second exhaust gas turbine; the supercharger shaft of the first-stage supercharger is a first supercharger shaft, and the supercharger shaft of the second-stage supercharger is a second supercharger shaft, and the first counterweight structure and the second counterweight structure are provided on at least one of the first supercharger shaft and the second supercharger shaft.

[0014] According to some embodiments of the present invention, the engine assembly includes a supercharger housing, the first exhaust gas turbine, the first compressor, the second exhaust gas turbine and the second compressor are all located in the supercharger housing, the first supercharger shaft and the second supercharger shaft are both rotatably supported on the supercharger housing, and the first counterweight structure and the second counterweight structure are provided on one of the first supercharger shaft and the second supercharger shaft.

[0015] According to some embodiments of the present invention, a first bypass line and a first bypass valve are included, wherein the first bypass line is arranged in parallel with the second compressor, and the first bypass valve is arranged in the first bypass line to control the opening and closing of the first bypass line.

[0016] According to some embodiments of the present invention, the first exhaust gas turbine and the second exhaust gas turbine are arranged in series, and in the flow direction of the airflow in the exhaust pipe, the first exhaust gas turbine is located on the downstream side of the second exhaust gas turbine.

[0017] According to some embodiments of the present invention, a second bypass line and a second bypass valve are included, wherein the second bypass line is arranged in parallel with the second exhaust gas turbine, and the second bypass valve is arranged in the second bypass line to control the opening and closing of the second bypass line.

[0018] According to some embodiments of the present invention, the engine assembly includes a motor, and the motor is connected to the supercharger to drive the supercharger to operate.

[0019] According to some embodiments of the present invention, there are two superchargers, which are respectively a primary supercharger and a secondary supercharger; there are two motors, which are respectively a first motor and a second motor; the first motor is used to drive the primary supercharger, and the second motor is used to drive the secondary supercharger.

[0020] According to some embodiments of the present invention, there are two superchargers, which are a primary supercharger and a secondary supercharger, respectively, and the primary supercharger and the secondary supercharger are driven by the same motor.

[0021] According to some embodiments of the present invention, the engine assembly includes a battery, and the battery is connected to the motor to supply power to the motor.

[0022] A vehicle according to an embodiment of a second aspect of the present invention comprises: an engine assembly according to an embodiment of the first aspect of the present invention.

[0023] The vehicle according to the embodiment of the present invention is provided with the above-mentioned engine assembly, and the first counterweight structure and the second counterweight structure are arranged at the axial ends of the supercharger shaft, so that the imbalance of the supercharger shaft can be reduced, which can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and also improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly, which is conducive to improving the working efficiency of the engine.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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: Figure 1 is a simplified diagram of an engine assembly according to some embodiments of the present invention; Figure 2 yes Figure 1 A simplified diagram of the assembly of a first counterweight structure, a second counterweight structure and a supercharger in an engine assembly; Figure 3 yes Figure 2 A schematic diagram of the first counterweight structure in FIG. Figure 4 yes Figure 2 Schematic diagram of the second counterweight structure in .

[0026] Reference numerals: 100. Engine components; 1. Engine; 11. Intake pipe; 12. Exhaust pipe; 21. a first motor; 22. a second motor; 3. First stage supercharger; 32. First exhaust gas turbine; 33. First supercharger shaft; 34. First compressor; 4. Secondary turbocharger; 42. Second exhaust gas turbine; 43. Second turbocharger shaft; 44. Second compressor; 51. first counterweight structure; 52. second counterweight structure; 53. mounting hole; 61. first bypass pipeline; 62. first bypass valve; 63. second bypass pipeline; 64. second bypass valve; 71. Control unit; 72. Storage unit; 73. Battery. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which 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.

[0028] Reference below Figure 1-Figure 4 An engine assembly 100 according to an embodiment of the present invention is described.

[0029] Reference Figure 1-Figure 4 The engine assembly 100 according to the first embodiment of the present invention includes an engine 1, a supercharger, a first counterweight structure 51 and a second counterweight structure 52. The engine 1 is connected to an intake pipe 11, and air enters the engine 1 through the intake pipe 11, so that the fuel inside the engine 1 can be burned more fully.

[0030] The supercharger is arranged on the air intake pipeline 11 and includes a rotatable supercharger shaft, and the first counterweight structure 51 and the second counterweight structure 52 are arranged at both ends of the supercharger shaft in the axial direction. By arranging the supercharger on the air intake pipeline 11, the gas can be compressed to more fully provide air for the inside of the engine 1, thereby improving the working efficiency of the engine 1 and also improving the response speed of the engine 1 when the power suddenly changes.

[0031] By arranging the first counterweight structure 51 and the second counterweight structure 52 at the axial ends of the supercharger shaft, the imbalance of the supercharger shaft can be reduced, which can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly 100, which is beneficial to improving the working efficiency of the engine 1.

[0032] In addition, reducing supercharger shaft vibration can also reduce wear on related components, reducing maintenance costs and downtime.

[0033] According to the engine assembly 100 of the embodiment of the present invention, the imbalance of the supercharger shaft can be reduced by arranging the first counterweight structure 51 and the second counterweight structure 52 at the axial ends of the supercharger shaft, which can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly 100, which is beneficial to improving the working efficiency of the engine 1.

[0034] Reference Figure 1-Figure 4 According to some embodiments of the present invention, at least one of the first counterweight structure 51 and the second counterweight structure 52 is integrally formed with the supercharger shaft. At least one of the first counterweight structure 51 and the second counterweight structure 52 is integrally formed with the supercharger shaft, which can enhance the overall structural strength of the engine assembly 100 to a certain extent, and can also omit the assembly process between the first counterweight structure 51 and / or the second counterweight structure 52 and the supercharger shaft, thereby improving the overall assembly efficiency of the engine assembly 100.

[0035] Reference Figure 1-Figure 4 According to some embodiments of the present invention, at least one of the first counterweight structure 51 and the second counterweight structure 52 is detachably connected to the supercharger shaft. For example, the first counterweight structure 51 may be detachably connected to the supercharger shaft, the second counterweight structure 52 may be detachably connected to the supercharger shaft, or both the first counterweight structure 51 and the second counterweight structure 52 may be detachably connected to the supercharger shaft. By detachably connecting at least one of the first counterweight structure 51 and the second counterweight structure 52 to the supercharger shaft, the maintenance or replacement of the first counterweight structure 51 and / or the second counterweight structure 52 may be facilitated.

[0036] Reference Figure 1-Figure 4 According to some embodiments of the present invention, at least one of the first counterweight structure 51 and the second counterweight structure 52 is provided with a mounting hole 53, and the supercharger shaft is passed through the mounting hole 53 and fixed relative to the supercharger shaft. The mounting hole 53 can make the assembly between the first counterweight structure 51 and / or the second counterweight structure 52 and the supercharger shaft more convenient. By passing the supercharger shaft through the mounting hole 53 and fixing it relative to the supercharger shaft, for example, the first counterweight structure 51 and / or the second counterweight structure 52 can be interference-fitted with the supercharger shaft, so that the connection between the first counterweight structure 51 and / or the second counterweight structure 52 and the supercharger shaft is simple and has strong stability.

[0037] Reference Figure 1-Figure 4According to some embodiments of the present invention, the engine 1 is connected to an exhaust pipe 12, the supercharger includes an exhaust gas turbine and a compressor, the exhaust gas turbine and the compressor are both arranged on the supercharger shaft, and the exhaust gas turbine and the compressor are arranged at intervals along the axial direction of the supercharger shaft, the compressor is arranged on the intake pipe 11, the exhaust gas turbine is arranged on the exhaust pipe 12, and the exhaust gas discharged from the exhaust pipe 12 is used to drive the exhaust gas turbine to move. By the supercharger including the exhaust gas turbine, and the exhaust gas turbine being arranged in the exhaust pipe 12, the exhaust gas discharged from the exhaust pipe 12 can drive the exhaust gas turbine to move, and the energy of the exhaust gas discharged from the exhaust pipe 12 can be fully utilized to improve the exhaust gas recovery rate. By arranging the exhaust gas turbine and the compressor at intervals along the axial direction of the supercharger shaft, the supercharger shaft can transmit the rotation of the exhaust gas turbine to the compressor, so that the compressor moves and compresses the air.

[0038] The first counterweight structure 51 is located on the side of the exhaust turbine away from the compressor, and the second counterweight structure 52 is located on the side of the compressor away from the exhaust turbine. Since the first counterweight structure 51 is located on the side of the exhaust turbine away from the compressor, and the second counterweight structure 52 is located on the side of the compressor away from the exhaust turbine, the first counterweight structure 51 and the second counterweight structure 52 can reduce the imbalance of the supercharger shaft while avoiding interference between the first counterweight structure 51 and the second counterweight structure 52 and the exhaust turbine or the compressor.

[0039] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the torque relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies: m1*l1+m t *l t =m c *l c +m2*l2, where m1 is the mass of the first counterweight structure 51, l1 is the distance between the center of mass of the first counterweight structure 51 and the central axis of the supercharger shaft, m2 is the mass of the second counterweight structure 52, l2 is the distance between the center of mass of the second counterweight structure 52 and the central axis of the supercharger shaft, m c is the mass of the compressor, l c is the distance between the center of mass of the compressor and the central axis of the supercharger shaft, m t is the mass of the exhaust turbine, l t It is the distance between the center of mass of the exhaust turbine and the central axis of the supercharger shaft.

[0040] The torque relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies m1*l1+m t *l t =m c *l c+m2*l2 can balance the torque of the components distributed on the supercharger shaft on both sides of the central axis of the supercharger shaft, effectively reduce or eliminate the vibration and noise of the supercharger shaft caused by the unbalanced torque on both sides of the central axis of the supercharger shaft, enhance the stability of the operation of the supercharger shaft, and thus improve the stability of the operation of the engine assembly 100.

[0041] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the moment of inertia relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies: m1*r1 2 +m2* r2 2 =m c * r c 2 +m t * r t 2 , where m1 is the mass of the first counterweight structure 51, r1 is the distance between the center of mass of the first counterweight structure 51 and the rotation axis of the supercharger shaft, m2 is the mass of the second counterweight structure 52, r2 is the distance between the center of mass of the second counterweight structure 52 and the rotation axis of the supercharger shaft, m c is the mass of the compressor, r c is the distance between the rotation axis of the compressor and supercharger shafts, m t is the mass of the exhaust turbine, r t The distance between the axis of rotation of the exhaust gas turbine and the supercharger shaft.

[0042] The torque relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies m1*r1 2 +m2* r2 2 =m c * r c 2 +m t * r t 2 , the rotational inertia of each component on the supercharger shaft can be balanced, effectively reducing or eliminating the imbalance caused by the uneven distribution of the rotational inertia on the supercharger shaft. The balance of the rotational inertia can effectively reduce the vibration amplitude of the supercharger shaft, reduce the vibration and noise of the supercharger shaft, enhance the stability of the operation of the supercharger shaft, and thus improve the stability of the operation of the engine assembly 100.

[0043] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the torque relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies: m1*l1+m t *l t =m c *lc +m2*l2; the moment of inertia relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies: m1*r1 2 +m2* r2 2 =m c * r c 2 +m t * r t 2 ; Wherein, m1 is the mass of the first counterweight structure 51, l1 is the distance between the center of mass of the first counterweight structure 51 and the central axis of the supercharger shaft, r1 is the distance between the center of mass of the first counterweight structure 51 and the rotation axis of the supercharger shaft, m2 is the mass of the second counterweight structure 52, l2 is the distance between the center of mass of the second counterweight structure 52 and the central axis of the supercharger shaft, r2 is the distance between the center of mass of the second counterweight structure 52 and the rotation axis of the supercharger shaft, and m c is the mass of the compressor, l c is the distance between the center of mass of the compressor and the central axis of the supercharger shaft, r c is the distance between the rotation axis of the compressor and supercharger shafts, m t is the mass of the exhaust turbine, l t is the distance between the center of mass of the exhaust turbine and the central axis of the supercharger shaft, r t The distance between the axis of rotation of the exhaust gas turbine and the supercharger shaft.

[0044] The torque relationship between the first counterweight structure 51, the second counterweight structure 52, the exhaust gas turbine and the compressor satisfies m1*l1+m t *l t =m c *l c +m2*l2 and the moment of inertia relationship satisfies m1*r1 2 +m2* r2 2 =m c * r c 2 +m t * r t 2 , the balance of the rotational inertia of the components distributed on the supercharger shaft can be achieved, and the balance of the rotational inertia of the components distributed on the supercharger shaft can also be achieved. The balance of torque and rotational inertia can effectively reduce the vibration amplitude of the supercharger shaft, reduce the vibration and noise of the supercharger shaft, enhance the stability of the operation of the supercharger shaft, and thus improve the stability of the operation of the engine assembly 100.

[0045] Reference Figure 1-Figure 4According to some embodiments of the present invention, there are two superchargers, which are respectively a primary supercharger 3 and a secondary supercharger 4. By making the engine assembly 100 include a primary supercharger 3 and a secondary supercharger 4 arranged in series, two-stage supercharging is adopted, so that the gas can be compressed more fully, and air can be provided more fully to the inside of the engine 1, thereby improving the working efficiency of the engine 1, and also improving the response speed of the engine 1 when the power changes suddenly.

[0046] For example, at least one of the primary supercharger 3 and the secondary supercharger 4 is a vortex supercharger, and the vortex supercharger has good sealing performance, so that the primary supercharger 3 and / or the secondary supercharger 4 have higher working efficiency, and the mechanical efficiency of the primary supercharger 3 and / or the secondary supercharger 4 can be improved, thereby improving the performance of the engine component 100.

[0047] The compressor of the first-stage supercharger 3 is the first compressor 34, and the compressor of the second-stage supercharger 4 is the second compressor 44. The first compressor 34 and the second compressor 44 are connected in series, and in the flow direction of the airflow in the intake pipe 11, the first compressor 34 is located on the upstream side of the second compressor 44. The exhaust gas turbine of the first-stage supercharger 3 is the first exhaust gas turbine 32, and the exhaust gas turbine of the second-stage supercharger 4 is the second exhaust gas turbine 42. The supercharger shaft of the first-stage supercharger 3 is the first supercharger shaft 33, and the supercharger shaft of the second-stage supercharger 4 is the second supercharger shaft 43. The first supercharger shaft 33 can transmit the rotation of the first exhaust gas turbine 32 to the first compressor 34, so that the first compressor 34 moves and compresses the air. The second supercharger shaft 43 can transmit the rotation of the second exhaust gas turbine 42 to the second compressor 44, so that the second compressor 44 moves and compresses the air.

[0048] A first counterweight structure 51 and a second counterweight structure 52 are disposed on at least one of the first supercharger shaft 33 and the second supercharger shaft 43 .

[0049] For example, the first counterweight structure 51 and the second counterweight structure 52 may be provided at both axial ends of the first supercharger shaft 33 or the second supercharger shaft 43, so as to reduce the imbalance of the first supercharger shaft 33 or the second supercharger shaft 43. This can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the first supercharger shaft 33 or the second supercharger shaft 43 caused by the imbalance, and improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly 100, which is beneficial to improving the working efficiency of the engine 1.

[0050] For another example, the first supercharger shaft 33 and the second supercharger shaft 43 may be provided with a first counterweight structure 51 and a second counterweight structure 52 at both axial ends thereof, so as to reduce the imbalance of the first supercharger shaft 33 and the second supercharger shaft 43. This can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the first supercharger shaft 33 and the second supercharger shaft 43 caused by the imbalance, and further improve the stability and reliability of the supercharger shaft, thereby further enhancing the stability of the operation of the engine assembly 100, which is beneficial to improving the working efficiency of the engine 1.

[0051] For example, air first enters the first compressor 34 through the intake pipe 11 for preliminary supercharging, and the second compressor 44 can further supercharge the air compressed by the first compressor 34. The air supercharged by the second compressor 44 enters the engine 1, making the combustion of the fuel in the engine 1 more complete. The exhaust gas discharged by the engine 1 enters the second exhaust gas turbine 42 through the exhaust pipe 12. The exhaust gas can drive the second exhaust gas turbine 42 to rotate. The second supercharger shaft 43 can transmit the rotation of the second exhaust gas turbine 42 to the second compressor 44, so that the second compressor 44 moves and compresses the air. The first exhaust gas turbine 32 can further recycle the exhaust gas after being used by the second exhaust gas turbine 42. The exhaust gas can drive the first exhaust gas turbine 32 to rotate. The first supercharger shaft 33 can transmit the rotation of the first exhaust gas turbine 32 to the first compressor 34, so that the first compressor 34 moves and compresses the air. The exhaust gas used by the first exhaust gas turbine 32 is discharged to the environment outside the engine assembly 100.

[0052] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the engine assembly 100 includes a supercharger housing, the first exhaust gas turbine 32, the first compressor 34, the second exhaust gas turbine 42 and the second compressor 44 are all located in the supercharger housing, the first supercharger shaft 33 and the second supercharger shaft 43 are both rotatably supported in the supercharger housing, and the first counterweight structure 51 and the second counterweight structure 52 are arranged on one of the first supercharger shaft 33 and the second supercharger shaft 43.

[0053] The first exhaust gas turbine 32, the first compressor 34, the second exhaust gas turbine 42 and the second compressor 44 are all arranged in the supercharger housing, and the space in the supercharger housing is fully utilized, so that the overall structure of the supercharger is compact, which is conducive to the overall layout optimization of the engine 1. The first supercharger shaft 33 and the second supercharger shaft 43 are both rotatably supported on the supercharger housing, and the supercharger housing can provide stable support for the first supercharger shaft 33 and the second supercharger shaft 43.

[0054] Furthermore, a first counterweight structure 51 and a second counterweight structure 52 are provided through one of the first supercharger shaft 33 and the second supercharger shaft 43, and both the first supercharger shaft 33 and the second supercharger shaft 43 are rotatably supported on the supercharger housing, so that the imbalance of the two superchargers can be reduced at the same time, thereby reducing the vibration and noise of the two superchargers at the same time, reducing the number of parts, simplifying the overall structure of the engine assembly 100, and helping to reduce the manufacturing cost of the engine assembly 100.

[0055] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the first bypass line 61 and the first bypass valve 62 are included. The first bypass line 61 is arranged in parallel with the second compressor 44. The first bypass valve 62 is arranged on the first bypass line 61 to control the on-off of the first bypass line 61. By making the engine assembly 100 include the first bypass line 61 and making the first bypass line 61 and the second compressor 44 arranged in parallel, part of the air can enter the intake line 11 through the first bypass line 61, and finally enter the engine 1, thereby increasing the flow rate of the air entering the engine 1, making the combustion in the engine 1 more complete, and improving the working efficiency of the engine 1. By providing the first bypass valve 62 on the first bypass line 61, the first bypass valve 62 can control the on-off of the first bypass line 61.

[0056] For example, when the engine 1 has a large power and requires a large amount of air, the first bypass valve 62 can be opened to allow air to enter the intake pipe 11 through the first bypass line 61, thereby increasing the air flow in the intake pipe 11, making the combustion of fuel in the engine 1 more complete and improving the working efficiency of the engine 1.

[0057] When the power of engine 1 is low and the required air volume is low, the first bypass valve 62 can be closed so that the second compressor 44 only further pressurizes the air that has been pressurized by the first compressor 34, thereby reducing the energy consumption of the first compressor 34 while ensuring that sufficient gas is provided to the engine 1.

[0058] For example, the engine assembly 100 also includes a control unit 71 and a storage unit 72. The storage unit 72 is electrically connected to the engine 1. The control unit 71 is electrically connected to the first bypass valve 62 and the storage unit 72. The storage unit 72 is used to collect and send the operating conditions of the engine 1. The control unit 71 is used to receive the operating conditions of the engine 1 and control the opening and closing of the first bypass valve 62 according to the received operating conditions of the engine 1. The automatic control function of the engine assembly 100 can be realized, and the air flow rate in the intake pipe 11 can be adjusted in time according to the actual operating conditions of the engine 1, thereby improving the working efficiency of the engine 1.

[0059] Reference Figure 1-Figure 4According to some embodiments of the present invention, the first exhaust gas turbine 32 and the second exhaust gas turbine 42 are arranged in series, and in the flow direction of the airflow in the exhaust pipe 12, the first exhaust gas turbine 32 is located at the downstream side of the second exhaust gas turbine 42. By arranging the first exhaust gas turbine 32 and the second exhaust gas turbine 42 in series, the exhaust gas can be recycled and utilized by the second exhaust gas turbine 42 and the first exhaust gas turbine 32 in sequence after entering the exhaust pipe 12, and the energy in the exhaust gas can be recycled and utilized more fully, which can improve the recycling rate of the exhaust gas.

[0060] Reference Figure 1-Figure 4 According to some embodiments of the present invention, a second bypass line 63 and a second bypass valve 64 are included. The second bypass line 63 is arranged in parallel with the second exhaust gas turbine 42. The second bypass valve 64 is arranged in the second bypass line 63 to control the on-off of the second bypass line 63. By arranging the second bypass line 63 in parallel with the second exhaust gas turbine 42 and the second bypass valve 64 is used to control the on-off of the second bypass line 63, the on-off of the second bypass line 63 can be controlled according to the actual operation of the engine 1, thereby reducing the risk of damage to the second exhaust gas turbine 42.

[0061] For example, when the speed of the engine 1 is too fast, since the exhaust gas flow rate discharged by the engine 1 is large, if all the exhaust gas is passed into the second exhaust gas turbine 42, the second exhaust gas turbine 42 may be damaged due to excessive speed. At this time, the second bypass valve 64 can be opened to allow part of the gas to be discharged through the second bypass pipe 63, and the speed of the second exhaust gas turbine 42 can be appropriately reduced to avoid damage to the second exhaust gas turbine 42.

[0062] For another example, when the load of the engine 1 is relatively small, the engine 1 does not need too much air intake, and the second bypass valve 64 can be opened to allow the exhaust gas exhausted by the engine 1 to be discharged through the second bypass line 63, thereby preventing the second exhaust gas turbine 42 from continuously rotating to drive the second compressor 44 to rotate and introduce too much gas into the engine 1, thereby reducing the risk.

[0063] For example, the engine assembly 100 also includes a control unit 71 and a storage unit 72, the storage unit 72 is electrically connected to the engine 1, the control unit 71 is electrically connected to the second bypass valve 64 and the storage unit 72, the storage unit 72 is used to collect and send the operating conditions of the engine 1, the control unit 71 is used to receive the operating conditions of the engine 1, and control the on and off of the second bypass valve 64 according to the received operating conditions of the engine 1, so as to realize the automatic control function of the engine assembly 100, and timely adjust the size of the exhaust gas flow in the exhaust pipe 12 according to the actual operating conditions of the engine 1, thereby reducing the risk of overloading the engine 1.

[0064] Reference Figure 1-Figure 4According to some embodiments of the present invention, the engine assembly 100 includes a motor, which is connected to the supercharger to drive the supercharger to work. By providing a motor for the supercharger, the motor can directly provide driving force to the supercharger according to the needs of the engine 1, and can play an auxiliary supercharging role for the supercharger, thereby improving the response speed of the supercharger, so that a higher efficiency of supercharging can be achieved, so that the optimal working condition of the engine 1 can be reached relatively quickly.

[0065] For example, in the related art, the method of boosting by driving the supercharger to move through the exhaust gas of the engine 1, when the engine 1 is started or running at a low speed, the engine 1 starts slowly and the intake volume of the supercharger is insufficient, causing the engine 1 to reach the optimal operating condition relatively slowly. Directly driving the supercharger by the motor can play an auxiliary boosting role for the supercharger and improve the response speed of the supercharger, so that more efficient boosting can be achieved, so that the optimal operating condition of the engine 1 can be reached relatively quickly.

[0066] Moreover, compared with the mechanical superchargers in the related art that can only operate at medium and low speeds, the motor-driven supercharger has a wider operating range and can provide a wider selection of calibration strategies.

[0067] Reference Figure 1-Figure 4 According to some embodiments of the present invention, there are two superchargers, which are arranged in series, and the two superchargers are respectively a primary supercharger 3 and a secondary supercharger 4. There are two motors, and the two motors are respectively a first motor 21 and a second motor 22. The first motor 21 is used to drive the primary supercharger 3, and the second motor 22 is used to drive the secondary supercharger 4. The first motor 21 is connected to the primary supercharger 3, and the second motor 22 is connected to the secondary supercharger 4. By connecting the first motor 21 to the primary supercharger 3 and the second motor 22 to the secondary supercharger 4, the primary supercharger 3 and the secondary supercharger 4 can be driven by the first motor 21 and the second motor 22 respectively, and the opening and closing of the primary supercharger 3 or the secondary supercharger 4 can be controlled separately according to the working conditions.

[0068] Reference Figure 1-Figure 4 According to some embodiments of the present invention, there are two superchargers, which are arranged in series. The two superchargers are respectively a first-stage supercharger 3 and a second-stage supercharger 4. The first-stage supercharger 3 and the second-stage supercharger 4 are driven by the same motor, which can reduce the number of parts and simplify the overall structure of the engine assembly 100, which is conducive to reducing the manufacturing cost of the engine assembly 100.

[0069] For example, a first gear is provided at the input end of the first-stage supercharger 3, a second gear is provided at the input end of the second-stage supercharger 4, a third gear is connected to the motor shaft of the motor, and the third gear is meshed with both the first gear and the second gear. By meshing the third gear with both the first gear and the second gear, the motor shaft of the motor can be connected to the first-stage supercharger 3 and the second-stage supercharger 4, so that the kinetic energy of the same motor is transmitted to the first-stage supercharger 3 and the second-stage supercharger 4 at the same time, respectively, so as to achieve the effect of driving the first-stage supercharger 3 and the second-stage supercharger 4 by the same motor.

[0070] For another example, the engine assembly 100 includes a transfer case, the transfer case is connected to the motor shaft of the motor, the transfer case includes a first output shaft and a second output shaft, the first output shaft is connected to the primary supercharger 3, and the second output shaft is connected to the secondary supercharger 4. The first output shaft of the transfer case is connected to the primary supercharger 3, and the second output shaft is connected to the secondary supercharger 4, so that the transfer case can transfer the kinetic energy of the motor transmission to the primary supercharger 3 and the secondary supercharger 4 at the same time, respectively, so as to achieve the effect of driving the primary supercharger 3 and the secondary supercharger 4 by the same motor.

[0071] Reference Figure 1-Figure 4 According to some embodiments of the present invention, the engine assembly 100 includes a battery 73, which is connected to the motor to supply power to the motor. The battery 73 can provide stable energy for the motor, so that the first-stage supercharger 3 and the second-stage supercharger 4 can be directly started by the electric energy in the battery 73, thereby improving the response speed of the first-stage supercharger 3 and the second-stage supercharger 4.

[0072] Reference Figure 1-Figure 4 The vehicle according to the second embodiment of the present invention comprises the engine assembly 100 according to the first embodiment of the present invention.

[0073] According to the vehicle of the embodiment of the present invention, by providing the above-mentioned engine assembly 100, the imbalance of the supercharger shaft can be reduced by arranging the first counterweight structure 51 and the second counterweight structure 52 at the axial ends of the supercharger shaft, which can effectively reduce the vibration and noise of the supercharger, reduce the friction and wear of the supercharger shaft caused by the imbalance, and also improve the stability and reliability of the supercharger shaft, thereby enhancing the stability of the operation of the engine assembly 100, which is beneficial to improving the working efficiency of the engine 1.

[0074] 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", "axial", "radial", "circumferential" 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 limiting the present invention.

[0075] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0076] In the description of the present invention, "plurality" means two or more.

[0077] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0078] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does 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.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine assembly (100), characterized in that: include: An engine (1), wherein the engine (1) is connected to an air intake pipeline (11); A supercharger, arranged in the air intake pipeline (11) and comprising a rotatable supercharger shaft; The first counterweight structure (51) and the second counterweight structure (52) are arranged at two axial ends of the supercharger shaft.

2. The engine assembly (100) according to claim 1, characterized in that At least one of the first counterweight structure (51) and the second counterweight structure (52) is integrally formed with the supercharger shaft.

3. The engine assembly (100) according to claim 1, characterized in that At least one of the first counterweight structure (51) and the second counterweight structure (52) is detachably connected to the supercharger shaft.

4. The engine assembly (100) according to claim 1, characterized in that At least one of the first counterweight structure (51) and the second counterweight structure (52) is provided with a mounting hole (53), and the supercharger shaft passes through the mounting hole (53) and is fixed relative to the supercharger shaft.

5. The engine assembly (100) according to claim 1, characterized in that The engine (1) is connected to an exhaust pipeline (12); the supercharger comprises an exhaust gas turbine and a compressor; the exhaust gas turbine and the compressor are both arranged on the supercharger shaft and spaced apart along the axial direction of the supercharger shaft; the compressor is arranged on the intake pipeline (11); the exhaust gas turbine is arranged on the exhaust pipeline (12); the exhaust gas discharged from the exhaust pipeline (12) is used to drive the exhaust gas turbine to move; The first counterweight structure (51) is located on a side of the exhaust gas turbine away from the compressor, and the second counterweight structure (52) is located on a side of the compressor away from the exhaust gas turbine.

6. The engine assembly (100) according to claim 5, characterized in that The torque relationship between the first counterweight structure (51), the second counterweight structure (52), the exhaust gas turbine and the compressor satisfies: m1*l1+m t *l t =m c *l c +m2*l2; Wherein, m1 is the mass of the first counterweight structure (51), l1 is the distance between the center of mass of the first counterweight structure (51) and the central axis of the supercharger shaft, m2 is the mass of the second counterweight structure (52), l2 is the distance between the center of mass of the second counterweight structure (52) and the central axis of the supercharger shaft, and m c is the mass of the compressor, l c is the distance between the center of mass of the compressor and the central axis of the supercharger shaft, m t is the mass of the exhaust gas turbine, l t is the distance between the center of mass of the exhaust turbine and the central axis of the supercharger shaft.

7. The engine assembly (100) according to claim 5, characterized in that The relationship between the moments of inertia of the first counterweight structure (51), the second counterweight structure (52), the exhaust gas turbine and the compressor satisfies: m1*r1 2 +m2*r2 2 =m c * r c 2 +m t * r t 2 ; Wherein, m1 is the mass of the first counterweight structure (51), r1 is the distance between the center of mass of the first counterweight structure (51) and the rotation axis of the supercharger shaft, m2 is the mass of the second counterweight structure (52), r2 is the distance between the center of mass of the second counterweight structure (52) and the rotation axis of the supercharger shaft, and m c is the mass of the compressor, r c is the distance between the rotation axis of the compressor and the supercharger shaft, m t is the mass of the exhaust gas turbine, r t is the distance between the rotational axis of the exhaust gas turbine and the supercharger shaft.

8. The engine assembly (100) according to claim 5, characterized in that There are two superchargers, the two superchargers are respectively a first-stage supercharger (3) and a second-stage supercharger (4); the compressor of the first-stage supercharger (3) is a first compressor (34), the compressor of the second-stage supercharger (4) is a second compressor (44), the first compressor (34) and the second compressor (44) are connected in series, and in the flow direction of the airflow in the intake pipeline (11), the first compressor (34) is located at the upstream side of the second compressor (44); the exhaust gas turbine of the first-stage supercharger (3) is a first exhaust gas turbine (32), and the exhaust gas turbine of the second-stage supercharger (4) is a second exhaust gas turbine (42); The supercharger shaft of the first-stage supercharger (3) is a first supercharger shaft (33), and the supercharger shaft of the second-stage supercharger (4) is a second supercharger shaft (43). The first counterweight structure (51) and the second counterweight structure (52) are arranged on at least one of the first supercharger shaft (33) and the second supercharger shaft (43).

9. The engine assembly (100) according to claim 8, characterized in that The engine assembly (100) comprises a supercharger housing, wherein the first exhaust gas turbine (32), the first compressor (34), the second exhaust gas turbine (42) and the second compressor (44) are all located in the supercharger housing, the first supercharger shaft (33) and the second supercharger shaft (43) are both rotatably supported on the supercharger housing, and the first counterweight structure (51) and the second counterweight structure (52) are arranged on one of the first supercharger shaft (33) and the second supercharger shaft (43).

10. The engine assembly (100) according to claim 8, characterized in that The invention comprises a first bypass pipeline (61) and a first bypass valve (62), wherein the first bypass pipeline (61) is arranged in parallel with the second compressor (44), and the first bypass valve (62) is arranged on the first bypass pipeline (61) to control the on-off of the first bypass pipeline (61).

11. The engine assembly (100) according to claim 8, characterized in that The first exhaust gas turbine (32) and the second exhaust gas turbine (42) are arranged in series, and in the flow direction of the airflow in the exhaust pipe (12), the first exhaust gas turbine (32) is located on the downstream side of the second exhaust gas turbine (42).

12. The engine assembly (100) according to claim 11, characterized in that The invention comprises a second bypass pipeline (63) and a second bypass valve (64), wherein the second bypass pipeline (63) is arranged in parallel with the second exhaust gas turbine (42), and the second bypass valve (64) is arranged on the second bypass pipeline (63) to control the on-off of the second bypass pipeline (63).

13. The engine assembly (100) according to claim 1, characterized in that The engine assembly (100) comprises a motor, which is connected to the supercharger to drive the supercharger to operate.

14. The engine assembly (100) according to claim 13, characterized in that There are two superchargers, which are respectively a primary supercharger (3) and a secondary supercharger (4); there are two motors, which are respectively a first motor (21) and a second motor (22); the first motor (21) is used to drive the primary supercharger (3), and the second motor (22) is used to drive the secondary supercharger (4).

15. The engine assembly (100) according to claim 13, characterized in that There are two superchargers, which are a primary supercharger (3) and a secondary supercharger (4). The primary supercharger (3) and the secondary supercharger (4) are driven by the same motor.

16. The engine assembly (100) according to claim 13, characterized in that The engine assembly (100) comprises a battery (73), and the battery (73) is connected to the motor to supply power to the motor.

17. A vehicle, characterized in that: include: An engine assembly (100) according to any one of claims 1-16.

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