Electronically supercharged vehicle
By designing lubrication channels and cooling channels in the electronic supercharger, the problem of insufficient bearing lubrication under high speed and long-term operation is solved, achieving efficient bearing lubrication and cooling, and improving the working performance of the electronic supercharger.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- VALEO EMBRAYAGES SAS
- Filing Date
- 2025-05-30
- Publication Date
- 2026-08-04
AI Technical Summary
Existing electronic superchargers suffer from insufficient bearing lubrication under high speed and long-term operating conditions, leading to decreased efficiency. Furthermore, existing grease lubrication solutions evaporate and fail at high temperatures.
It adopts a lubrication channel design, including a lubrication oil inlet, outlet and internal flow channel, which utilizes gravity natural flow to provide bearing lubrication, and combines with cooling channels to cool the motor and lubricating oil, making it suitable for high-speed and long-term operation of electronic superchargers.
This achieves effective lubrication of the bearings under high speed and long-term operating conditions, improving the efficiency and reliability of the electric supercharger and reducing the need for additional lubrication systems.
Smart Images
Figure CN224592404U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to an electronic supercharger, and also to a vehicle including such an electronic supercharger. Background Technology
[0002] By compressing air through a turbocharger, the engine's intake air density is increased, thereby increasing engine power. Simultaneously, improved combustion efficiency due to enhanced air-fuel mixture regulation also contributes to fuel savings and reduced emissions. Turbochargers include exhaust gas turbocharging and supercharging technologies. Exhaust gas turbocharging utilizes exhaust gases from the combustion process to drive a turbine, increasing the engine's intake air volume and boosting power output. Supercharging, on the other hand, is directly connected to the engine crankshaft via a pulley, ensuring immediate response when the throttle is closed.
[0003] With technological advancements, electronic supercharging technology has been proposed. Electronic supercharging uses an electric motor and compressor to drive the turbine, replacing the wasteful exhaust gas. Its efficiency is comparable to that of a mechanical supercharger, and its response speed is just as rapid. When the accelerator is pressed, the electronic supercharger immediately activates the compressor, forcing air into the turbine and into the engine. The electronic supercharger relies on a battery to operate initially and can work in conjunction with the exhaust turbine. When the turbine rotates fast enough to generate its own power, the electric motor and compressor automatically shut down, and the exhaust turbine takes over.
[0004] Due to the limited power supply of gasoline vehicles, the electric superchargers in typical gasoline vehicles usually only operate for short periods, thus requiring less stringent performance from the electric drive module. However, with the development of range-extended and hybrid vehicles, electric superchargers can now be supplied with sufficient power and higher voltage, enabling them to operate continuously. This places higher demands on the electric drive module within the electric supercharger.
[0005] Therefore, a new electronic booster is proposed. Utility Model Content
[0006] Therefore, this disclosure aims to solve the aforementioned problems of existing electronic superchargers, and its purpose is to provide an electronic supercharger, including a housing; a motor shaft disposed within the housing to drive a turbine to rotate; a first bearing disposed on the inner wall of the housing at the driving end of the motor shaft to support the motor shaft; a second bearing disposed on the inner wall of the housing at the non-driving end of the motor shaft to support the motor shaft; and a lubrication passage for lubricating the first and second bearings. The lubrication passage includes: a lubrication oil inlet disposed on the upper side of the housing; an internal flow channel disposed within the housing for conveying lubricating oil from the lubrication oil inlet to the first and second bearings; and a lubrication oil outlet disposed on the lower side of the housing.
[0007] The electronic supercharger according to this disclosure can be applied to motor shafts that operate at high speeds and for extended periods, providing sufficient lubrication for the bearings on the motor shaft.
[0008] The electronic supercharger according to this disclosure may also have one or more of the following features, individually or in combination.
[0009] For example, according to one embodiment of this disclosure, the electronic supercharger is configured to operate in sync with the engine.
[0010] For example, according to one embodiment of the present disclosure, the lubricating oil passage includes a lubricating oil inlet and a lubricating oil outlet, and the internal flow passage includes an axial flow passage to transport lubricating oil axially between the driving end and the non-driving end.
[0011] For example, according to one embodiment of this disclosure, the lubricating oil inlet is located at one of the non-driving end or the driving end, and the lubricating oil outlet is located at the other of the non-driving end or the driving end.
[0012] For example, according to one embodiment of this disclosure, the lubricating oil inlet is located at the non-driving end, the lubricating oil outlet is located at the driving end, and the axial flow channel delivers the lubricating oil from the lubricating oil inlet to the driving end.
[0013] For example, according to one embodiment of this disclosure, the internal oil passage further includes a first radial flow passage and a second radial flow passage, the first radial flow passage connecting the axial flow passage and the first bearing, and the second radial flow passage connecting the lubricating oil inlet and the second bearing.
[0014] For example, according to one embodiment of this disclosure, the first radial flow channel and the second radial flow channel are formed by drilling holes in the housing.
[0015] For example, according to one embodiment of this disclosure, the electronic supercharger further includes a cooling channel disposed within the housing and surrounding the motor portion.
[0016] For example, according to one embodiment of the present disclosure, the cooling channel is radially disposed outside the axial flow channel, and the cooling channel is axially disposed between the lubricating oil inlet and the lubricating oil outlet.
[0017] For example, according to one embodiment of this disclosure, the cooling channel includes a coolant inlet and a coolant outlet, which are disposed on both sides of the motor shaft in the radial direction.
[0018] According to another aspect of this disclosure, a vehicle is also proposed, comprising: an electronic supercharger according to any embodiment of this disclosure.
[0019] For example, according to some embodiments of this disclosure, the vehicle includes a hybrid vehicle and a range-extended vehicle. Attached Figure Description
[0020] The above and other features and advantages of this disclosure will become more apparent from the following detailed description of exemplary embodiments taken in conjunction with the accompanying drawings, which are for illustrative purposes only and are not intended to limit the scope of this disclosure in any way. The following drawings are not intentionally drawn to scale with actual dimensions; their focus is on illustrating the gist of this disclosure. In the figures:
[0021] Figure 1 A perspective view of an electronic supercharger according to an embodiment of the present disclosure is shown.
[0022] Figure 2 A cross-sectional perspective view of an electronic supercharger according to an embodiment of the present disclosure is shown.
[0023] In each figure, identical or similar parts are represented by the same reference numerals.
[0024] List of reference numerals
[0025] 1. Electronic booster
[0026] 21. Shell
[0027] 22 motors
[0028] 23 Motor Shaft
[0029] 25 turbo
[0030] 31 First Bearing
[0031] 32 Second Bearing
[0032] 4. Lubricating oil passage
[0033] 41 First radial flow channel
[0034] 42 Second radial flow channel
[0035] 43 Axial flow channel
[0036] 44 Lubricating oil inlet
[0037] 45 Lubricating oil outlet
[0038] 5 Cooling Channels
[0039] 51 Coolant Inlet
[0040] 52 Coolant outlet Detailed Implementation
[0041] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.
[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The use of terms such as “a,” “an,” or “the” in this patent application specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.
[0043] In this disclosure, the axial direction refers to the direction along the extension of the motor shaft, and the radial direction refers to the direction perpendicular to and passing through the motor shaft.
[0044] According to one aspect of this disclosure, an electronic booster 1 is proposed, such as... Figure 1 and Figure 2 As shown, the electric supercharger 1 may include a housing 21, a motor 22 mounted in the housing 21, and a turbine 25 driven by the motor 22. The turbine 25 can rotate to compress air, increasing the intake air density of the engine, thereby increasing the engine power. To drive the turbine, the electric supercharger 1 also includes a motor shaft 23 connecting the motor 22 and the turbine 25, the motor shaft 23 being disposed within the housing 21 to drive the turbine 25 to rotate.
[0045] In order to enable the motor shaft 23 to rotate, the electronic booster 1 may also be provided with two bearings. For example, a first bearing 31 is provided on the inner wall of the housing 21 at the driving end of the motor shaft 23, and a second bearing 32 is provided on the inner wall of the housing 21 at the non-driving end of the motor shaft 23, so as to support the motor shaft 23 and facilitate the rotation of the motor shaft 23.
[0046] The electric supercharger 1 according to this disclosure can be powered by a high-voltage power supply (e.g., 400V) and rotate at high speed (e.g., up to 80,000 rpm). For example, the electric supercharger 1 can be installed in, for example, range-extended vehicles and hybrid vehicles. The electric supercharger 1 can also be continuously driven by an electric motor while the engine (not shown) is running. For example, the electric supercharger 1 is configured to operate synchronously with the engine, that is, it can be set so that the electric supercharger 1 is activated whenever the engine is started and deactivated whenever the engine is turned off.
[0047] Therefore, the electronic supercharger according to this disclosure can feature high speed and long-term operation, which places high demands on the electric drive module of the electronic supercharger, such as high requirements for bearing lubrication. Existing electronic superchargers typically use grease lubrication for bearing lubrication; however, grease lubrication is clearly unsuitable for the aforementioned high speed and long-term operation conditions. Under these conditions, high temperatures are generated, causing the grease to evaporate, leaving the bearings operating without lubrication and severely impacting efficiency.
[0048] In response, this disclosure proposes a new lubrication solution, specifically an oil lubrication solution. For example... Figure 2 As shown, the electronic supercharger 1 of this disclosure may include a lubrication channel 4 for supplying lubricating oil to the first bearing 31 and the second bearing 32. This lubrication scheme is suitable for motor shafts operating at high speeds and for extended periods, providing sufficient lubrication to the bearings on the motor shaft.
[0049] For example, such as Figure 1 and Figure 2 As shown, the lubricating oil passage 4 may include a lubricating oil inlet 44, a lubricating oil outlet 45, and an internal flow channel connecting the lubricating oil inlet 44 and the lubricating oil outlet 45. The internal oil passage is disposed within the housing 21 to deliver lubricating oil from the lubricating oil inlet 44 to the first bearing 31 and the second bearing 32, thereby achieving lubrication of the first bearing 31 and the second bearing 32. According to one embodiment of this disclosure, the lubricating oil passage 4 can be directly connected to the engine's lubrication system, thereby eliminating the need for an additional lubricating oil supply system.
[0050] like Figure 2 As shown, the lubricating oil inlet 44 can be located on the upper side of the housing, and the lubricating oil outlet 45 can be located on the lower side of the housing. In this disclosure, Figure 2 This shows the orientation of the electronic supercharger 1 after installation; the upper and lower sides are not only relative to each other. Figure 2 The description refers to the upper and lower sides relative to the ground reference after installation. By setting the lubricating oil inlet 44 and the lubricating oil outlet 45 on the upper and lower sides respectively, the lubricating oil can flow out naturally by gravity without pressurizing the lubricating oil or filling the entire internal flow channel with lubricating oil.
[0051] Furthermore, such as Figure 2 As shown, the lubricating oil passage 4 may include a lubricating oil inlet 44 and a lubricating oil outlet 45, so that lubricating oil entering through the lubricating oil inlet 44 can be delivered to the first bearing 31 and the second bearing 32. The internal flow passage may include an axial flow passage 43 to transport lubricating oil axially between the driving end and the non-driving end. In this disclosure, the form of the axial flow passage 43 is not limited to that shown. Figure 2The flow channel shown extends axially, and can extend at an angle to the axial direction, or bend or bend, as long as the lubricating oil is transported in the axial direction.
[0052] For example, the lubricating oil inlet 44 can be located at one of the non-drive end or the drive end, and the lubricating oil outlet 45 can be located at the other of the non-drive end or the drive end. This arrangement is to reserve space for the cooling channel, which will be described in detail later. Further, as... Figure 2 As shown, the lubricating oil inlet 44 can be located at the non-drive end, and the lubricating oil outlet 45 can be located at the drive end. Since the electronic control components of the motor 22 are usually located at the non-drive end, placing the lubricating oil inlet 44 at the non-drive end also allows for better heat dissipation of the electronic control components. Furthermore, placing the lubricating oil outlet 45 at the drive end instead of the non-drive end prevents most of the lubricating oil from flowing directly out of the lubricating oil outlet 45 from the non-drive end side without flowing through the first bearing 31 located at the drive end.
[0053] exist Figure 2 In the illustrated embodiment, the axial flow channel 43 can deliver lubricating oil from the lubricating oil inlet 44 located at the non-drive end to the first bearing 41 at the drive end. Furthermore, the lubricating oil flowing through the second bearing 42 can flow to the lubricating oil outlet 45 located at the drive end. For example, the lubricating oil flowing through the second bearing 42 can flow to the lubricating oil outlet 45 through the gap between the motor 22 and the housing 21, without the need for a dedicated additional channel.
[0054] To connect the axial flow channel 43, the lubricating oil inlet 44, the lubricating oil outlet 45, and the first bearing 31 and the second bearing 32, according to embodiments of this disclosure, the internal oil passage may further include a first radial flow channel 41 and a second radial flow channel 42. For example... Figure 2 As shown, the first radial flow channel 41 can be disposed at the drive end to connect the axial flow channel 43 and the first bearing 31, and the second radial flow channel 42 can be disposed at the non-drive end to connect the lubricating oil inlet 44 and the second bearing 32. In this disclosure, the forms of the first radial flow channel 41 and the second radial flow channel 42 are not limited to those shown. Figure 2 The radially extending flow channel shown can extend at an angle to the radial direction, or it can be bent or folded, as long as the lubricating oil is transported in the radial direction.
[0055] Furthermore, the first radial flow channel 41 and the second radial flow channel 42 can be formed by drilling holes in the housing 21. This method is easy to implement and the process is simple. Due to this forming method, such as Figure 2 As shown, the first radial flow channel 41 may be in direct contact with the outside environment, thus requiring a seal to be installed at the end opening of the first radial flow channel 41 to prevent external contaminants from entering the lubricating oil passage 4.
[0056] like Figure 1 and Figure 2 As shown, the electric supercharger 1 may also include a cooling channel 5 for cooling the electric supercharger 1, particularly the motor 22 and the lubricating oil. For example, as Figure 2 As shown, the cooling channel 5 can be set inside the housing 21 and surround the motor part, so the entire cooling channel is annular.
[0057] Furthermore, such as Figure 2 As shown, the cooling channel 5 can be radially arranged outside the axial flow channel 43, and axially arranged between the lubricating oil inlet 44 and the lubricating oil outlet 45 to achieve sufficient cooling of the motor 22 and the axial flow channel 43. Furthermore, this arrangement facilitates the formation of the cooling channel 5, for example, as... Figure 2 As shown, the entire cooling channel is formed by sealing and fixing a closed shell around the surface of the complete annular groove (e.g., by welding), thereby forming an annular flow path. This method is easy to implement and the process is simple.
[0058] like Figure 2 As shown, the cooling channel 5 may further include a coolant inlet 51 and a coolant outlet 52, which are located on opposite sides of the motor shaft 23 in the radial direction. For example, the coolant inlet 51 may be located on the lower side of the housing 21 and the coolant outlet 52 may be located on the upper side of the housing 21. Figure 2 As shown, this ensures that the coolant fills the entire cooling channel 5 for more thorough cooling. According to embodiments of this disclosure, the cooling channel 5 can be externally connected to the engine's cooling system via a coolant inlet 51 and a coolant outlet 52, thereby eliminating the need for an additional coolant supply system.
[0059] According to another aspect of this disclosure, a vehicle (not shown) is also proposed, which may include an engine (not shown) and an electric supercharger 1 according to this disclosure for compressing air to increase the intake air density of the engine, thereby increasing the engine power. For example, the vehicle according to this disclosure may include a hybrid vehicle and a range-extended vehicle, thereby having sufficient electrical charge and being able to provide sufficiently high voltage so that the electric supercharger according to this disclosure can operate at high speed for extended periods.
[0060] The vehicle according to this disclosure can be configured to allow the engine and the electric supercharger 1 to operate synchronously, i.e., to start and stop simultaneously. Furthermore, the engine can also operate independently of the electric supercharger 1, for example, when power is insufficient. According to embodiments of this disclosure, the lubrication passage 4 and cooling passage 5 of the electric supercharger 1 can be connected to the engine's lubrication system and cooling system, respectively, thereby eliminating the need for separate lubrication and coolant supply systems for the electric supercharger 1 and saving costs.
[0061] Certain features, structures, or characteristics in one or more embodiments of this disclosure may be appropriately combined.
[0062] The foregoing description is illustrative of the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the foregoing description is illustrative of the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of this disclosure.
Claims
1. An electronic supercharger (1), characterized by, include Shell (21) The motor shaft (23) is disposed within the housing (21) to drive the turbine (25) to rotate. The first bearing (31) is disposed on the inner wall of the housing (21) at the drive end of the motor shaft (23) to support the motor shaft (23). The second bearing (32) is disposed on the inner wall of the housing (21) at the non-driving end of the motor shaft (23) to support the motor shaft (23). A lubrication channel (4) for lubricating the first bearing (31) and the second bearing (32), the lubrication channel (4) comprising: A lubricating oil inlet (44) is located on the upper side of the housing (21). An internal flow channel, disposed within the housing (21), is used to deliver lubricating oil from the lubricating oil inlet (44) to the first bearing (31) and the second bearing (32). The lubricating oil outlet (45) is located on the lower side of the housing (21).
2. The electronic booster (1) according to claim 1, characterized in that, The electronic supercharger (1) is configured to operate in sync with the engine.
3. The electronic booster (1) according to claim 1, characterized in that, The lubricating oil passage (4) includes a lubricating oil inlet (44) and a lubricating oil outlet (45), and the internal flow passage includes an axial flow passage (43) to transport lubricating oil axially between the driving end and the non-driving end.
4. The electronic booster (1) according to claim 3, characterized in that, The lubricating oil inlet (44) is located at one of the non-driving end or the driving end, and the lubricating oil outlet (45) is located at the other of the non-driving end or the driving end.
5. The electronic booster (1) according to claim 4, characterized in that, The lubricating oil inlet (44) is located at the non-driving end, and the lubricating oil outlet (45) is located at the driving end. The axial flow channel (43) delivers the lubricating oil from the lubricating oil inlet (44) to the drive end.
6. The electronic booster (1) according to claim 5, characterized in that, The lubricating oil passage (4) further includes a first radial flow passage (41) and a second radial flow passage (42). The first radial flow passage (41) connects the axial flow passage (43) and the first bearing (31), and the second radial flow passage (42) connects the lubricating oil inlet (44) and the second bearing (32).
7. The electronic booster (1) according to claim 6, characterized in that, The first radial flow channel (41) and the second radial flow channel (42) are formed by drilling holes in the housing (21).
8. The electronic booster (1) according to any one of claims 1 to 5, characterized in that, The electronic supercharger (1) also includes a cooling channel (5), which is disposed within the housing (21) and surrounds the motor portion.
9. The electronic booster (1) according to claim 8, characterized in that, The cooling channel (5) is radially disposed outside the axial flow channel (43) of the internal flow channel, and the cooling channel (5) is axially disposed between the lubricating oil inlet (44) and the lubricating oil outlet (45).
10. The electronic booster (1) according to claim 8, characterized in that, The cooling channel (5) includes a coolant inlet (51) and a coolant outlet (52), which are located on both sides of the motor shaft (23) in the radial direction.
11. A vehicle characterized by comprising: Includes the electronic supercharger (1) according to any one of claims 1 to 10.
12. The vehicle of claim 11, wherein, The vehicles include hybrid vehicles and range-extended vehicles.