Switching structure of electric auxiliary supercharger

Abstract

The invention provides an electric auxiliary supercharger switching structure which comprises a supercharger body, the supercharger body comprises a turbine and an air compression wheel connected with the turbine through a transmission shaft, a driving motor is arranged on a shell outside the turbine in a sliding mode, a transmission block is assembled at the output shaft end of the driving motor, and the fixed end of the driving motor is connected with a pushing mechanism; a first fixing support is arranged on the shell outside the air compression wheel, a rotating shaft is rotationally connected to the first fixing support, a transmission disc is arranged at one end of the rotating shaft, the transmission disc and the transmission block rotate in a transmission fit mode, and the rotating shaft is connected with the transmission shaft through a transmission mechanism and drives the transmission block to rotate so as to drive the transmission disc to rotate. The transmission mechanism drives the transmission shaft to rotate. The electric auxiliary driving mode can be rapidly switched to at the initial stage of engine starting, the supercharger intermediate shaft is driven by means of motor power to accelerate, the air inlet efficiency is remarkably improved, and the performance of the engine at the starting stage is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of turbocharger technology, and particularly relates to an electric-assisted turbocharger switching structure. Background Technology

[0002] Electric-assisted turbocharging integrates the electric motor and turbocharger into a single design. An auxiliary motor that can function as both an electric motor and a generator is coupled to the turbocharger's drive shaft. The aim is to improve the compressor rotor's response speed by using the motor to drive or brake it, thereby improving the transient response performance of the turbocharging system and enhancing its boost performance.

[0003] Electric-assisted turbocharging (EAG) systems fundamentally solve the problem of matching reciprocating piston engines with rotary turbochargers under all operating conditions. When the engine accelerates or exhaust gas energy is insufficient, the EAG can accelerate the compressor response by using an electric motor-assisted mode. When the engine decelerates or exhaust gas energy is abundant, it can switch to turbocharging mode to recover exhaust gas energy and improve overall engine thermal efficiency. The flexible operating modes of the electric motor in the EAG completely break the power balance relationship between the turbine and compressor in traditional turbochargers, as well as the constraints of the coupling between the turbocharger and the engine. This gives EAG significant advantages in addressing issues such as insufficient low-speed torque, slow transient response, and improved exhaust energy utilization.

[0004] Existing turbochargers rely on engine exhaust gases to drive a turbine during startup. The turbine's rotation, via a drive shaft, drives a compressor wheel, which in turn draws air into its housing before it enters the engine. However, at startup, the amount of exhaust gas is relatively small, resulting in insufficient turbine drive and a limited amount of air entering the engine. This leads to a slower response time for the turbocharger during startup. Summary of the Invention

[0005] In view of this, this application aims to propose an electric auxiliary turbocharger switching structure to solve the problem of insufficient intake air volume and slow start-up response speed caused by insufficient exhaust gas volume and insufficient turbine driving force when a traditional engine is first started.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows: This application provides an electric-assisted turbocharger switching structure, including a turbocharger body, the turbocharger body including a turbine and a compressor wheel connected to the turbine via a drive shaft, a drive motor slidably disposed on the housing of the turbine, a transmission block assembled at the output shaft end of the drive motor, and a push mechanism connected to the fixed end of the drive motor; The outer casing of the compressor wheel is provided with a first fixed bracket, and a rotating shaft is rotatably connected to the first fixed bracket. A transmission disc is provided at one end of the rotating shaft. The transmission disc rotates in a transmission cooperation with the transmission block. The rotating shaft is connected to the transmission shaft through a transmission mechanism, which drives the transmission block to rotate, thereby driving the transmission disc to rotate, and driving the transmission shaft to rotate through the transmission mechanism. It also includes a controller, which controls the power supply to the drive motor to be cut off based on the collected transmission shaft speed.

[0007] Furthermore, the transmission mechanism includes a driving pulley, a belt, and a driven pulley; The driving pulley is mounted on the drive shaft, and the driven pulley is mounted on the rotating shaft. The driving pulley is connected to the driven pulley via a belt.

[0008] Furthermore, an inner disc is mounted on the drive shaft, and the drive pulley is rotatably mounted on the inner disc. Multiple ratchet mechanisms are also provided between the drive pulley and the inner disc to drive the inner disc to rotate.

[0009] Furthermore, the outer periphery of the inner disc is provided with a number of slots, and the inner side of the drive pulley is provided with pawls that match the number of slots. When the drive pulley rotates clockwise, the pawls are engaged in the slots to push the inner disc to rotate.

[0010] Furthermore, a second fixed bracket is provided on the housing of the turbine peripheral device, a horizontal guide rail is provided on the second fixed bracket, and a sliding block is provided at the bottom end of the drive motor that slides in cooperation with the horizontal guide rail.

[0011] Furthermore, the pushing mechanism is a telescopic cylinder, one end of which is mounted on the second fixed bracket, and the other end is fixedly connected to the fixed end of the drive motor.

[0012] Furthermore, a first gear is mounted on the drive shaft, and the first gear meshes with a second gear. The second gear is mounted on the side wall of the casing of the turbine via a connecting shaft. A speed sensor is mounted on the connecting shaft and is connected to the controller.

[0013] Furthermore, in response to the rotational speed of the drive shaft being greater than a preset value, the controller controls the power supply of the drive motor to be cut off based on the received rotational speed signal.

[0014] Compared with the prior art, the electric auxiliary turbocharger switching structure described in this application has the following advantages: The electric-assisted turbocharger switching structure described in this application effectively solves the problems of insufficient intake air volume and slow start-up response speed caused by insufficient exhaust gas volume and insufficient turbine driving force when traditional engines are first started. Through the coordinated design of the drive motor, belt drive, ratchet mechanism and push mechanism, it can quickly switch to electric-assisted drive mode at the initial stage of engine start-up. With the help of the motor power to drive the turbocharger intermediate shaft to speed up, the intake efficiency is significantly improved and the performance of the engine during the start-up phase is guaranteed. At the same time, with the addition of a speed sensor and controller, the motor power can be automatically cut off after the exhaust gas driven turbine speed reaches the standard, realizing intelligent switching between electric assistance and conventional exhaust gas drive. This avoids power waste and ensures efficient operation of the turbocharger under all working conditions. The overall structure is simple and reliable, with outstanding practicality and economy. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of an electric auxiliary turbocharger switching structure according to an embodiment of this application; Figure 2 This is a schematic diagram showing the details of the transmission mechanism described in the embodiments of this application.

[0016] Explanation of reference numerals in the attached figures: 1-Transmission block; 2-Transmission disc; 3-Driven pulley; 4-Belt; 5-Compressor; 6-Transmission shaft; 7-Drive pulley; 8-First gear; 9-Second gear; 10-Speed ​​sensor; 11-Housing; 12-Turbine; 13-Horizontal guide rail; 14-Pushing mechanism; 15-Drive motor; 16-Controller; 17-Ratchet mechanism; 18-Inner disc; 19-Slot; 20-Pawl; 21-First fixed bracket; 22-Rotating shaft; 23-Second fixed bracket. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Please see Figure 1 As shown, this embodiment provides an electric-assisted turbocharger switching structure, including a turbocharger body, the turbocharger body including a turbine 12 and a compressor wheel 5 connected to the turbine 12 via a drive shaft 6, a drive motor 15 is slidably disposed on the housing 11 of the turbine 12, a transmission block 1 is assembled at the output shaft end of the drive motor 15, and a push mechanism 14 is connected to the fixed end of the drive motor 15. A first fixed bracket 21 is provided on the housing of the compressor turbine 5 (in this embodiment, only the housing 11 of the turbine is marked in the attached drawings, and the housing of the compressor turbine is not marked). A rotating shaft 22 is rotatably connected to the first fixed bracket 21. A transmission disc 2 is provided at one end of the rotating shaft 22. The transmission disc 2 rotates in a transmission cooperation with the transmission block 1. The rotating shaft 22 is connected to the transmission shaft 6 through a transmission mechanism, driving the transmission block 1 to rotate, thereby driving the transmission disc 2 to rotate, and driving the transmission shaft 6 to rotate through the transmission mechanism. The transmission mechanism includes a driving belt pulley 4, a belt 4, and a driven belt pulley 43. The driving belt pulley 4 is mounted on the transmission shaft 6, and the driven belt pulley 43 is mounted on the rotating shaft 22. The driving belt pulley 4 is connected to the driven belt pulley 43 through the belt 4. like Figure 2 As shown, an inner disc 18 is mounted on the drive shaft 6, and the drive belt 4 pulley is rotatably mounted on the inner disc 18. Multiple ratchet mechanisms 17 are also provided between the drive belt 4 pulley and the inner disc 18. The outer periphery of the inner disc 18 is provided with several slots 19, and the inner side of the drive belt 4 pulley is provided with pawls 20 matching the number of slots 19. When the drive belt 4 pulley rotates clockwise, the pawls 20 are engaged in the slots 19 to push the inner disc 18 to rotate. A second fixed bracket 23 is provided on the housing 11 of the turbine 12, and a horizontal guide rail 13 is provided on the second fixed bracket 23. A sliding block that slides with the horizontal guide rail 13 is provided at the bottom of the drive motor 15.

[0020] The pushing mechanism 14 is used to push the drive motor 15 to move, so that the transmission block 1 contacts or separates from the transmission disc 2. The pushing mechanism 14 used in this embodiment is a telescopic cylinder (which can be a hydraulic telescopic cylinder, a pneumatic telescopic cylinder or an electric telescopic cylinder). One end of the telescopic cylinder is set on the second fixed bracket 23, and the other end is fixedly connected to the fixed end of the drive motor 15.

[0021] With the above structure, when the engine is first started, the turbine 12 rotates slowly because the exhaust gas volume is relatively small. At this time, the drive motor 15 can be moved by the push mechanism 14, so that the transmission block 1 contacts the transmission disc 2. Then, the external power supply of the drive motor 15 is turned on, and the drive motor 15 drives the transmission block 1 to rotate clockwise. When the transmission block 1 rotates, the transmission disc 2 rotates due to friction. The rotation of the transmission disc 2 drives the driven belt pulley 3 to rotate. The rotation of the driven belt pulley 3 drives the drive belt pulley 4 to rotate through the belt 4. When the drive belt pulley 4 rotates clockwise, the pawl 20 is engaged in the slot 19 to push the inner disc 18 to rotate. When the inner disc 18 rotates, it drives the transmission shaft 6 to rotate, thereby speeding up the rotation of the transmission shaft 6 and increasing the intake air volume.

[0022] As the engine start-up time increases, the amount of exhaust gas increases, which in turn increases the speed of the turbine 12. When the speed of the turbine 12 driven by the exhaust gas is greater than the speed driven by the drive motor 15, the speed of the inner disc 18 is greater than the speed of the drive belt pulley 4. At this point, the power supply to the drive motor 15 can be cut off.

[0023] In some embodiments, a controller 16 is also included, which controls the power supply of the drive motor 15 to be cut off based on the collected rotational speed of the drive shaft 6. The transmission shaft 6 is equipped with a first gear 8, which meshes with a second gear 9. The second gear 9 is mounted on the side wall of the housing 11 outside the turbine 12 via a connecting shaft. A speed sensor 10 is mounted on the connecting shaft and is connected to the controller 16.

[0024] Specifically, in this embodiment, in order to achieve the above objective and facilitate the monitoring of the rotational speed of the inner disc 18, a first gear 8 (i.e., the driving gear) is fixed on the transmission shaft 6, and a second gear 9 (i.e., the driven gear) is meshed with the driving gear. A speed sensor 10 is provided on the shaft 22 of the driven gear. The signal output terminal of the speed sensor 10 is connected to the signal input terminal of the controller 16. The signal output terminal of the controller 16 is connected to the signal input terminal of the drive motor 15. When the rotational speed of the transmission shaft is greater than a preset value (it should be noted that this embodiment does not specifically limit the preset value, and it can be flexibly set according to the actual situation, which will not be elaborated here), the controller 16 will receive a signal and automatically cut off the power supply of the motor to reduce power waste.

[0025] This invention aims to solve the problem of insufficient intake air volume and slow start-up response speed of existing engines due to insufficient exhaust gas volume and insufficient turbine 12 drive during initial engine startup. It designs an electric-assisted turbocharger switching structure including a drive motor 15, a transmission belt pulley 4, a ratchet mechanism 17, and a push mechanism 14. In the initial stage of engine startup, the push mechanism 14 drives the drive motor 15, causing the transmission block 1 to contact the transmission disc 2. The drive motor 15, through the belt 4 and ratchet 20, drives the inner disc 18, accelerating the turbocharger drive shaft 6 and increasing the intake air volume. Simultaneously, in conjunction with the speed sensor 10 and controller 16, when the exhaust gas-driven turbine 12 reaches sufficient speed, the power to the drive motor 15 is automatically cut off, realizing the switching between electric assistance and conventional exhaust gas drive, improving the turbocharger start-up response speed and reducing power waste.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0027] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. An electrically assisted turbocharger switching structure, comprising a turbocharger body, the turbocharger body including a turbine and a compressor wheel connected to the turbine via a drive shaft, characterized in that: A drive motor is slidably mounted on the housing of the turbine peripheral device. A transmission block is assembled at the output shaft end of the drive motor, and a push mechanism is connected to the fixed end of the drive motor. The outer casing of the compressor wheel is provided with a first fixed bracket, and a rotating shaft is rotatably connected to the first fixed bracket. A transmission disc is provided at one end of the rotating shaft. The transmission disc rotates in a transmission cooperation with the transmission block. The rotating shaft is connected to the transmission shaft through a transmission mechanism, which drives the transmission block to rotate, thereby driving the transmission disc to rotate, and driving the transmission shaft to rotate through the transmission mechanism. It also includes a controller, which controls the power supply to the drive motor to be cut off based on the collected transmission shaft speed.

2. The electric auxiliary turbocharger switching structure according to claim 1, characterized in that: The transmission mechanism includes a driving pulley, a belt, and a driven pulley; The driving pulley is mounted on the drive shaft, and the driven pulley is mounted on the rotating shaft. The driving pulley is connected to the driven pulley via a belt.

3. The electric auxiliary turbocharger switching structure according to claim 2, characterized in that: An inner disc is mounted on the drive shaft, and the drive pulley is rotatably mounted on the inner disc. Multiple ratchet mechanisms are also provided between the drive pulley and the inner disc to drive the inner disc to rotate.

4. The electric auxiliary turbocharger switching structure according to claim 3, characterized in that: The inner disc has several slots around its outer perimeter, and the inner side of the drive pulley has pawls that match the number of slots. When the drive pulley rotates clockwise, the pawls engage in the slots to push the inner disc to rotate.

5. The electric auxiliary turbocharger switching structure according to claim 1, characterized in that: The turbine peripheral housing is provided with a second fixed bracket, the second fixed bracket is provided with a horizontal guide rail, and the bottom end of the drive motor is provided with a sliding block that slides in cooperation with the horizontal guide rail.

6. The electric auxiliary turbocharger switching structure according to claim 5, characterized in that: The pushing mechanism is a telescopic cylinder, one end of which is mounted on the second fixed bracket, and the other end is fixedly connected to the fixed end of the drive motor.

7. The electric auxiliary turbocharger switching structure according to claim 1, characterized in that: A first gear is mounted on the drive shaft, and the first gear meshes with a second gear. The second gear is mounted on the side wall of the turbine housing via a connecting shaft. A speed sensor is mounted on the connecting shaft and is connected to the controller.

8. The electric auxiliary turbocharger switching structure according to claim 7, characterized in that: In response to the transmission shaft speed being greater than a preset value, the controller controls the power supply to the drive motor to be cut off based on the received speed signal.

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