Charging system for vehicle

Abstract

To actualize the operation of a turbine in a flow path cross section area appropriate to each rotating speed.SOLUTION: A charging system 100 for a vehicle 500 includes a supercharger TC including a turbine T to be driven by exhaust gas from an internal combustion engine 200 and an adjuster 80 for adjusting the cross section area of a flow path 62 flowing into a disc wheel 3 of the turbine T, a battery 300 capable of being charged with electricity generated by power from the internal combustion engine 200, and a control device 90 for controlling the adjuster 80, the control device 90 serving for switching the adjuster 80 between a first charge mode and a second charge mode to set the cross section area of the flow path 62 to be a first cross section area in the first charge mode and to set the cross section area of the flow path 62 to be a second cross section area different from the first cross section area in the second charge mode.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a charging system for a vehicle. [Background technology]

[0002] An electric vehicle may include a turbine for generating electricity. For example, Patent Document 1 discloses a system including an internal combustion engine, a storage battery, and a turbine. Exhaust from the internal combustion engine drives the turbine. The output of a generator connected to the turbine charges the storage battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-252517 Summary of the Invention [Problem to be solved by the invention]

[0004] The internal combustion engine may be operated at a number of discrete predetermined speeds during charging, including, for example, a slow charging speed and a fast charging speed, and in order to improve operating efficiency, it is desirable to operate the turbine with a flow cross-sectional area appropriate for each speed.

[0005] An object of the present disclosure is to provide a charging system for a vehicle that can operate a turbine with a flow path cross-sectional area suitable for each rotation speed. [Means for solving the problem]

[0006] A charging system for a vehicle according to one embodiment of the present disclosure includes a turbocharger including a turbine operated by exhaust gas from an internal combustion engine and an adjuster that adjusts the cross-sectional area of ​​a flow path flowing into a blade wheel of the turbine, a battery capable of charging with electricity generated by power from the internal combustion engine, and a control device that controls the adjuster, switching the adjuster between a first charging mode and a second charging mode, setting the cross-sectional area of ​​the flow path to a first cross-sectional area in the first charging mode, and setting the cross-sectional area of ​​the flow path to a second cross-sectional area different from the first cross-sectional area in the second charging mode.

[0007] The first cross-sectional area may be smaller than the second cross-sectional area, and the power delivered to the battery in the first charging mode may be greater than the power delivered to the battery in the second charging mode.

[0008] The turbocharger includes a compressor connected to the turbine, and the adjuster may include a movable wall defining a portion of the flow path, a fluid chamber accommodating the movable wall, a conduit directing compressed fluid from the compressor to the fluid chamber, and an elastic body that pushes the movable wall in a direction that expands or narrows the cross-sectional area of ​​the flow path.

[0009] The adjuster may include a first stopper for positioning the movable wall in a first position corresponding to the first charging mode, and a second stopper for positioning the movable wall in a second position corresponding to the second charging mode. Effect of the Invention

[0010] According to the present disclosure, the turbine can be operated with a flow passage cross-sectional area suitable for each rotation speed. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic diagram of a charging system for a vehicle according to an embodiment. [Diagram 2] FIG. 2 is a schematic enlarged cross-sectional view showing the movable wall in a first position. [Diagram 3] FIG. 3 is a schematic enlarged cross-sectional view showing the movable wall in a second position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The specific dimensions, materials, numerical values, etc. shown in the embodiments are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present disclosure are omitted from the drawings.

[0013] 1 is a schematic diagram of a charging system 100 for a vehicle 500 according to an embodiment. The vehicle 500 includes the charging system 100 and a motor 400. The vehicle 500 may further include other components. The charging system 100 includes an internal combustion engine 200, a battery 300, a turbocharger TC, and a control device 90. The charging system 100 may further include other components.

[0014] In this embodiment, the vehicle 500 is an automobile that uses electricity as a power source to drive the wheels. For example, in this embodiment, the vehicle 500 may be a range extender. For example, in this embodiment, the internal combustion engine 200 does not drive the wheels and is used only for generating electricity to charge the battery 300. In other embodiments, the vehicle 500 may be another automobile that uses the internal combustion engine 200 to drive the wheels in addition to charging the battery 300, such as a plug-in hybrid electric vehicle (PHEV).

[0015] The internal combustion engine 200 may be, for example, an engine such as a gasoline engine or a diesel engine. For example, the internal combustion engine 200 is connected to a generator 210, and the generator 210 generates electricity using power from the internal combustion engine 200. The electricity from the generator 210 charges the battery 300. For example, the generator 210 may be built into the internal combustion engine 200.

[0016] The battery 300 supplies electricity to the motor 400. The motor 400 drives the wheels using the electricity from the battery 300.

[0017] The turbocharger TC includes a turbine T and a centrifugal compressor C. The turbine T is driven by exhaust gas from the internal combustion engine 200, and the centrifugal compressor C compresses air by the rotational force from the turbine T. The compressed air is supplied to the internal combustion engine 200.

[0018] The turbocharger TC includes a housing 1 , a shaft 2 , a turbine wheel 3 , and a compressor wheel 4 .

[0019] As described below, the turbine wheel 3 and the compressor wheel 4 rotate integrally with the shaft 2. Therefore, in this disclosure, the axial direction, radial direction, and circumferential direction of the shaft 2, the turbine wheel 3, and the compressor wheel 4 may be simply referred to as the "axial direction," the "radial direction," and the "circumferential direction," respectively, unless otherwise specified. Also, in this disclosure, the central axis of the shaft 2, the turbine wheel 3, and the compressor wheel 4 may be simply referred to as the "central axis," unless otherwise specified.

[0020] The housing 1 includes a bearing housing 5, a turbine housing 6, and a compressor housing 7. One end of the bearing housing 5 in the axial direction is connected to the turbine housing 6 by a fastener such as a G coupling. The other end of the bearing housing 5 in the axial direction is connected to the compressor housing 7 by a fastener such as a bolt.

[0021] The bearing housing 5 includes a bearing hole 5a. The bearing hole 5a extends in the axial direction within the bearing housing 5. The bearing hole 5a accommodates a bearing B. The bearing B rotatably supports the shaft 2. In this embodiment, a pair of rolling bearings is used as the bearing B. In other embodiments, other radial bearings such as full-floating bearings or semi-floating bearings may be used as the bearing B.

[0022] A turbine wheel 3 is provided at a first end of the shaft 2 in the axial direction. The turbine wheel 3 rotates integrally with the shaft 2. A turbine housing 6 rotatably accommodates the turbine wheel 3. A compressor wheel 4 is provided at a second end of the shaft 2 opposite to the first end in the axial direction. The compressor wheel 4 rotates integrally with the shaft 2. A compressor housing 7 rotatably accommodates the compressor wheel 4.

[0023] The compressor housing 7 includes an air intake port 71 at an end opposite to the bearing housing 5 in the axial direction. The air intake port 71 is connected to an air cleaner (not shown).

[0024] The bearing housing 5 and the compressor housing 7 define a diffuser passage 72 therebetween. The diffuser passage 72 has an annular shape. The diffuser passage 72 is located radially outward relative to the compressor impeller 4. The diffuser passage 72 is in fluid communication with the intake port 71 via the compressor impeller 4.

[0025] The compressor housing 7 includes a compressor scroll passage 73. The compressor scroll passage 73 is located radially outward of the diffuser passage 72. The compressor scroll passage 73 communicates with the diffuser passage 72. The compressor scroll passage 73 also fluidly communicates with an intake port of the internal combustion engine 200.

[0026] When the compressor impeller 4 rotates, air is sucked into the compressor housing 7 through the intake port 71. The air is accelerated and pressurized by centrifugal force while passing through the compressor impeller 4. The air is further pressurized while passing through the diffuser passage 72 and the compressor scroll passage 73. The pressurized air flows out from a discharge port (not shown) and is led to the intake port of the internal combustion engine 200. In the turbocharger TC, a portion including the compressor impeller 4 and the compressor housing 7 functions as a centrifugal compressor C.

[0027] The turbine housing 6 includes a discharge port 61 at an end opposite to the bearing housing 5 in the axial direction. The discharge port 61 is connected to an exhaust gas purification device (not shown).

[0028] The turbine housing 6 includes a connection passage 62. The connection passage 62 has an annular shape. The connection passage 62 is located radially outward from the turbine wheel 3. The connection passage 62 is located upstream of the turbine wheel 3. The connection passage 62 is fluidly connected to the discharge port 61 via the turbine wheel 3. A plurality of vanes V are arranged in the connection passage 62. The plurality of vanes V are arranged along the circumferential direction in a region radially outward from the turbine wheel 3.

[0029] The turbocharger TC includes an adjuster 80 that adjusts the cross-sectional area of ​​the connecting passage 62 that flows into the turbine wheel 3. The adjuster 80 will be described in detail later.

[0030] The turbine housing 6 includes a turbine scroll passage 63. The turbine scroll passage 63 is located radially outward of the connecting passage 62. The turbine scroll passage 63 is in fluid communication with the connecting passage 62. The turbine scroll passage 63 also communicates with a gas inlet (not shown). The gas inlet receives exhaust gas discharged from an exhaust manifold of the internal combustion engine 200.

[0031] The exhaust gas is guided from the gas inlet to the turbine scroll passage 63, and further through the connecting passage 62 and the turbine wheel 3 to the discharge port 61. The exhaust gas rotates the turbine wheel 3 while passing through it. The rotational force of the turbine wheel 3 is transmitted to the compressor wheel 4 via the shaft 2. When the compressor wheel 4 rotates, the air is compressed as described above. In this manner, the compressed air is guided to the intake port of the internal combustion engine 200. In the turbocharger TC, a portion including the turbine wheel 3 and the turbine housing 6 functions as the turbine T.

[0032] The control device 90 controls at least the adjuster 80. The control of the adjuster 80 by the control device 90 will be described in detail later. The control device 90 may further control some or all of the other components in the charging system 100. The control device 90 may further control some of the other components in the vehicle 500. For example, the control device 90 may be an ECU (Electronic Control Unit). The control device 90 includes components such as a processor 90a, a storage device 90b, and a connector 90c, and these components are connected to each other via a bus. The control device 90 may further include other components. For example, the processor 90a includes a CPU (Central Processing Unit) and the like. For example, the storage device 90b includes a hard disk, a ROM in which programs and the like are stored, and a RAM as a work area and the like. The control device 90 is communicatively connected to each component of the charging system 100 via the connector 90c. For example, a CAN (Controller Area Network) may be used for connection between the control device 90 and the components of the charging system 100. For example, the operation of the control device 90 may be realized by causing the processor 90a to execute a program stored in the storage device 90b.

[0033] Next, the adjuster 80 will be described.

[0034] Fig. 2 is a schematic enlarged cross-sectional view showing the movable wall 81 at the first position P1. Fig. 3 is a schematic enlarged cross-sectional view showing the movable wall 81 at the second position P2. Figs. 2 and 3 are schematic enlarged cross-sectional views showing part A in Fig. 1. With reference to Fig. 2, for example, the adjuster 80 includes the movable wall 81, a fluid chamber 82, a conduit 83, an elastic body 84, a first stopper 85, a second stopper 86, and a valve Va. The adjuster 80 may further include other components.

[0035] The movable wall 81 defines a part of the connecting passage 62. Specifically, the connecting passage 62 is defined by a first wall 62a and a second wall 62b. The first wall 62a and the second wall 62b are opposed to each other in the axial direction. For example, the first wall 62a is formed by a surface of the turbine housing 6, and the second wall 62b is formed by a surface of the bearing housing 5. In this embodiment, the movable wall 81 defines a part of the second wall 62b. The movable wall 81 has a generally annular shape. The movable wall 81 includes a first surface 81a axially facing the connecting passage 62 and a second surface 81b opposite to the first surface 81a. The second surface 81b axially faces the space in the fluid chamber 82.

[0036] In this embodiment, the movable wall 81 adjusts the cross-sectional area at the throat between the vanes V. In other words, in this embodiment, the movable wall 81 overlaps with the vanes V in the radial direction. Specifically, in this embodiment, the vanes V are fixed to the first wall 62a and protrude from the first wall 62a in the axial direction. The movable wall 81 includes a slit 81c at a position corresponding to the tip of the vane V. The tip of the vane V is inserted into the slit 81c.

[0037] The fluid chamber 82 accommodates the movable wall 81. For example, in this embodiment, the fluid chamber 82 may be a cavity or a groove formed in the bearing housing 5. The fluid chamber 82 has a generally annular shape. The movable wall 81 is air-tightly inserted into the fluid chamber 82. For example, seals S1 and S2 are disposed between the movable wall 81 and the fluid chamber 82. For example, the seals S1 and S2 may be O-rings.

[0038] The conduit 83 guides the compressed fluid (compressed air) from the centrifugal compressor C to the fluid chamber 82. In this embodiment, the conduit 83 is connected to the fluid chamber 82 at a position opposite the connecting flow passage 62 across the movable wall 81. For example, the conduit 83 includes a through hole 83a and a pipe 83b.

[0039] For example, the through hole 83a penetrates the bearing housing 5 from the fluid chamber 82 to the outer surface of the bearing housing 5. With reference to FIG. 1, for example, the through hole 83a may penetrate both the turbine housing 6 and the bearing housing 5 if the turbine housing 6 and the bearing housing 5 partially overlap.

[0040] A first end of the pipe 83b is connected to the through hole 83a. A second end of the pipe 83b is fluidly connected to a flow path of the compressed fluid of the centrifugal compressor C. Specifically, the second end of the pipe 83b is fluidly connected to the flow path of the compressed fluid at a position downstream of the compressor impeller 4. For example, the second end of the pipe 83b may be connected to a pipe (not shown) that connects the compressor scroll flow path 73 to an intake port of the internal combustion engine 200.

[0041] For example, the pipe 83b is provided with a valve Va. The valve Va is communicatively connected to the control device 90 and is controlled by the control device 90. For example, the control device 90 adjusts the flow rate of the compressed fluid supplied from the centrifugal compressor C to the fluid chamber 82 by controlling the opening degree of the valve Va. In other words, the control device 90 adjusts the cross-sectional area of ​​the connection flow path 62 by controlling the opening degree of the valve Va (described in detail later).

[0042] 2, in this embodiment, the elastic body 84 pushes the movable wall 81 in a direction to expand the cross-sectional area of ​​the connecting flow passage 62. In other words, the elastic body 84 pushes the movable wall 81 in a direction away from the vane V. For example, the elastic body 84 is disposed in an accommodation chamber 87 formed in the bearing housing 5.

[0043] Specifically, for example, the bearing housing 5 includes a main body 51, a first plate 52, and a second plate 53. The bearing housing 5 may further include other components. For example, the first plate 52 faces the connecting passage 62 in the axial direction and defines a part of the connecting passage 62. The first plate 52 has a generally annular shape. The first plate 52 extends radially from the middle of the shroud to the middle of the connecting passage 62. The first plate 52 is located radially inside the vane V and the movable wall 81. For example, the first plate 52 is fitted into the main body 51. The accommodation chamber 87 is formed between the main body 51 and the first plate 52.

[0044] In this embodiment, the elastic body 84 is a disc spring. In other embodiments, the elastic body 84 may be another elastic body, such as a coil spring. In this embodiment, the inner peripheral edge of the disc spring contacts the first plate 52, and the outer peripheral edge of the disc spring contacts a step 81d formed on the movable wall 81.

[0045] The first stopper 85 positions the movable wall 81 at a first position P1. Also, referring to Fig. 3, the second stopper 86 positions the movable wall 81 at a second position P2. In this embodiment, the first stopper 85 and the second stopper 86 are defined by a groove 88 formed in the bearing housing 5.

[0046] Specifically, the bearing housing 5 includes the second plate 53 as described above. For example, the second plate 53 faces the connecting passage 62 in the axial direction and defines a part of the connecting passage 62. The second plate 53 has a generally annular shape. The second plate 53 extends radially outward from the middle of the connecting passage 62. The second plate 53 is located radially outward of the vane V and the movable wall 81. For example, the second plate 53 is fitted into the main body 51. The groove 88 is formed between the main body 51 and the second plate 53. In this embodiment, the groove 88 is located radially outward of the movable wall 81. The groove 88 extends in the axial direction.

[0047] The groove 88 is defined by a pair of axially opposed surfaces, one of which defines a first stop 85 and the other of which defines a second stop 86.

[0048] The movable wall 81 includes a protrusion 89. In this embodiment, the protrusion 89 protrudes radially outward from the movable wall 81. The protrusion 89 is inserted into the groove 88. In the axial direction, the width of the protrusion 89 is smaller than the width of the groove 88. Therefore, the protrusion 89 can move in the axial direction within the groove 88 by a difference between the groove 88 and the protrusion 89. For example, the groove 88 and the protrusion 89 may be continuous in the circumferential direction or may have a ring shape. Alternatively, a plurality of grooves 88 and protrusions 89 may be arranged along the circumferential direction. Furthermore, the groove 88 and the protrusion 89 may be provided only partially in the circumferential direction.

[0049] Next, the operation of the charging system 100 will be described.

[0050] 1, in this embodiment, when the remaining charge of the battery 300 is low, the control device 90 operates the charging system 100 in a first charging mode or a second charging mode. For example, in this embodiment, the first charging mode is a high-speed charging mode, and the second charging mode is a low-speed charging mode. In these charging modes, the internal combustion engine 200 is operated and electricity is generated by the generator 210. The electricity from the generator 210 is charged into the battery 300.

[0051] In the fast charging mode, the internal combustion engine 200 is operated at a predetermined high rotation speed. For example, the fast charging mode may be executed when the consumption of electricity is higher than a predetermined threshold, such as when the vehicle 500 is traveling on a highway. In the slow charging mode, the internal combustion engine 200 is operated at a predetermined rotation speed lower than the rotation speed in the fast charging mode. For example, the slow charging mode may be executed when the consumption of electricity is equal to or lower than a predetermined threshold. Thus, in the charging mode, the internal combustion engine 200 is operated at a plurality of discrete rotation speeds. Here, the discrete rotation speed indicates that a parameter such as a numerical value that defines the operating state of the internal combustion engine 200, such as a control command value or a control target value of the rotation speed of the internal combustion engine 200, a command value of a control signal, etc., varies discretely with switching of the charging mode, and does not prevent the actual rotation speed of the internal combustion engine 200 from changing transiently (continuously) with switching of the charging mode. In this embodiment, two discrete rotation speeds are taken. In addition, in the charging mode, the above parameters do not take values ​​between the parameter values ​​determined in each charging mode.

[0052] Referring to FIG. 2, in the high-speed charging mode, the control device 90 adjusts the valve Va to increase the flow rate of the compressed fluid supplied from the centrifugal compressor C to the fluid chamber 82. The compressed fluid pushes the movable wall 81 toward the connection flow passage 62 against the elastic force of the elastic body 84. Therefore, the movable wall 81 moves along the axial direction so as to narrow the connection flow passage 62. When the protrusion 89 contacts the first stopper 85, the movable wall 81 stops and is positioned at the first position P1. In this embodiment, the cross-sectional area of ​​the connection flow passage 62 at this time is the first cross-sectional area. In this embodiment, the first cross-sectional area of ​​the connection flow passage 62 in the high-speed charging mode is narrow.

[0053] Referring to FIG. 3, in the low-speed charging mode, the control device 90 may adjust the valve Va to reduce the flow rate of the compressed fluid supplied from the centrifugal compressor C to the fluid chamber 82, or close the valve Va. The elastic body 84 pushes the movable wall 81 in the direction opposite to the connection flow passage 62 against the pressure from the compressed fluid. Therefore, the movable wall 81 moves along the axial direction so as to expand the connection flow passage 62. When the protrusion 89 contacts the second stopper 86, the movable wall 81 stops and is positioned at the second position P2. In this embodiment, the cross-sectional area of ​​the connection flow passage 62 at this time is the second cross-sectional area. In this embodiment, the second cross-sectional area of ​​the connection flow passage in the low-speed charging mode is larger than the first cross-sectional area. In the example of FIG. 3, in the second position P2, the movable wall 81 contacts the bottom wall of the fluid chamber 82 (the wall on the right side in FIG. 2). In other embodiments, in the second position P2, the movable wall 81 may not contact the bottom wall of the fluid chamber 82.

[0054] Thus, in this embodiment, the movable wall 81 is positioned at only two positions P1 and P2, and the cross-sectional area of ​​the connection flow path 62 is set to only the first cross-sectional area and the second cross-sectional area. Therefore, the adjuster 80 is easy to control.

[0055] As described above, the charging system 100 according to the present embodiment includes the turbine T operated by exhaust gas from the internal combustion engine 200, the turbocharger TC including the adjuster 80 for adjusting the cross-sectional area of ​​the connecting passage 62 flowing into the impeller 3 of the turbine T, the battery 300 capable of charging electricity generated by the power from the internal combustion engine 200, and the control device 90 for controlling the adjuster 80, which switches the adjuster 80 between a fast charging mode and a slow charging mode, and adjusts the cross-sectional area of ​​the connecting passage 62 to a first cross-sectional area in the fast charging mode and adjusts the cross-sectional area of ​​the connecting passage 62 to a second cross-sectional area larger than the first cross-sectional area in the slow charging mode. With this configuration, the turbine T can be operated with the cross-sectional area of ​​the connecting passage 62 suitable for each rotation speed.

[0056] Furthermore, in the charging system 100, the first cross-sectional area is smaller than the second cross-sectional area, and the power supplied to the battery 300 in the fast charging mode is greater than the power supplied to the battery 300 in the slow charging mode.

[0057] In the charging system 100, the turbocharger TC includes a centrifugal compressor C connected to the turbine T, and the adjuster 80 includes a movable wall 81 that defines a part of the connecting passage 62, a fluid chamber 82 that accommodates the movable wall 81, a conduit 83 that guides the compressed fluid from the centrifugal compressor C to the fluid chamber 82, and an elastic body 84 that pushes the movable wall 81 in a direction that expands the cross-sectional area of ​​the connecting passage 62. According to this configuration, the compressed fluid from the centrifugal compressor C can be used to adjust the cross-sectional area of ​​the connecting passage 62. Therefore, no additional power such as a motor is required to adjust the cross-sectional area of ​​the connecting passage 62. According to this configuration, a simple elastic body 84 such as a disc spring can be used to adjust the cross-sectional area of ​​the connecting passage 62.

[0058] Moreover, in the charging system 100, the adjuster 80 includes a first stopper 85 that positions the movable wall 81 at a first position P1 corresponding to the first charging mode, and a second stopper 86 that positions the movable wall 81 at a second position P2 corresponding to the second charging mode. With this configuration, the movable wall 81 can be easily positioned at the fixed first position P1 and second position P2. Therefore, the adjuster 80 can be easily controlled.

[0059] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to the above-described embodiments. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present disclosure.

[0060] For example, in the above embodiment, the first cross-sectional area in the fast charge mode is smaller than the second cross-sectional area in the slow charge mode. In other embodiments, the first cross-sectional area in the fast charge mode may be larger than the second cross-sectional area in the slow charge mode.

[0061] Also, for example, in the above embodiment, the first stopper 85 and the second stopper 86 are defined by a groove 88 formed in the bearing housing 5, and the movable wall 81 includes a protrusion 89 that is inserted into the groove 88. In other embodiments, the groove 88 may be formed in the movable wall 81, and the protrusion 89 may be formed in the bearing housing 5.

[0062] Also, for example, in the above embodiment, the internal combustion engine 200 is operated at two discrete rotation speeds, and the connecting passage 62 is set to two predetermined cross-sectional areas. In other embodiments, the internal combustion engine 200 may be operated at three or more discrete rotation speeds, and the connecting passage 62 may be set to three or more predetermined cross-sectional areas.

[0063] Also, for example, in the above embodiment, the elastic body 84 is configured to push the movable wall 81 in a direction to expand the cross-sectional area of ​​the connecting flow passage 62, and the compressed fluid is configured to push the movable wall 81 in a direction to narrow the cross-sectional area of ​​the connecting flow passage 62. In other embodiments, the elastic body 84 may be configured to push the movable wall 81 in a direction to narrow the cross-sectional area of ​​the connecting flow passage 62, and the compressed fluid may be configured to push the movable wall 81 in a direction to expand the cross-sectional area of ​​the connecting flow passage 62. That is, in other embodiments, the conduit 83 and the elastic body 84 may be arranged inversely to those in the above embodiment in the axial direction.

[0064] Also, for example, in the above embodiment, the adjuster 80 is provided in the bearing housing 5. In other embodiments, the adjuster 80 may be provided in the turbine housing 6.

[0065] The present disclosure can improve the fuel efficiency of vehicles and, therefore, can contribute to, for example, Goal 7 of the Sustainable Development Goals (SDGs) "Ensure access to affordable, reliable, sustainable and modern energy." [Explanation of symbols]

[0066] 3 Turbine wheel 62 Connecting passage (turbine passage) 80 Adjuster 81 Movable wall 82 Fluid Chamber 83 Conduit 84 Elastic Body 85 First stopper 86 Second stopper 90 Control device 100 Charging System 200 Internal combustion engine 300 Battery 500 vehicles C Centrifugal compressor (compressor) P1 1st position P2 2nd position T Turbine TC Turbocharger

Claims

1. A turbocharger including a turbine operated by exhaust gas from an internal combustion engine and an adjuster for adjusting a cross-sectional area of ​​a flow passage flowing into a blade wheel of the turbine; a battery capable of being charged with electricity generated by the power from the internal combustion engine; A control device for controlling the adjuster, switching the adjuster between a first charging mode and a second charging mode; In the first charging mode, the cross-sectional area of ​​the flow path is set to a first cross-sectional area; In the second charging mode, the cross-sectional area of ​​the flow path is set to a second cross-sectional area different from the first cross-sectional area. A control device; Equipped with Charging system for vehicles.

2. the first cross-sectional area is smaller than the second cross-sectional area; 2. The charging system for a vehicle according to claim 1, wherein the power supplied to the battery in the first charging mode is greater than the power supplied to the battery in the second charging mode.

3. The turbocharger includes a compressor coupled to the turbine, The adjuster is a movable wall defining a portion of the flow path; a fluid chamber containing the movable wall; a conduit for conducting compressed fluid from the compressor to the fluid chamber; an elastic body that pushes the movable wall in a direction that expands or narrows the cross-sectional area of ​​the flow path; Including, 2. The vehicle charging system according to claim 1.

4. The adjuster is a first stopper for positioning the movable wall at a first position corresponding to the first charging mode; a second stopper for positioning the movable wall at a second position corresponding to the second charging mode; Including, 4. The vehicle charging system according to claim 3.

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