Electronic gear shift control method for vehicle cog structure

Abstract

This invention discloses an electronic shift control method for a vehicle dog clutch structure, comprising: calibrating a pre-engagement angle A and a shift angle B on the CVT transmission assembly; the VCU receiving a shift request; the VCU issuing a shift command to the ERSU; the ERSU executing the pre-engagement angle A, engagement angle B, and disengagement angle A+B; the ERSU monitoring the driven cone speed of the CVT transmission assembly via the TCU; and the ERSU feeding back the shift status to the VCU. This electronic shift control method for a vehicle dog clutch structure can avoid shift failure caused by tooth overlap during shifting, improving reliability, reducing the cost of the shifting structure, and enhancing product market competitiveness.

Description

Technical Field

[0001] This invention belongs to the field of vehicle electronic shifting technology. Specifically, this invention relates to a vehicle gear shifting electronic shifting control method with a jaw clutch structure. Background Technology

[0002] With the booming automotive industry, its applications are becoming increasingly diverse, including outdoor leisure and entertainment, agricultural operations, industrial applications, off-road driving, and outdoor adventures. This demonstrates the complexity and harshness of its usage scenarios. During use, vehicles may encounter situations where they get stuck in sand pits or other obstacles, unable to extricate themselves due to insufficient power. In such cases, the vehicle's gear shifting system emerges. Common gear shifters employ a toothed clutch structure, which involves teeth engaging during gear shifting (e.g.,...). Figure 7 As shown in the figure, this prevents the gear shifting from being achieved, thus causing the gear shifting to fail.

[0003] The current common solution is to match the shift hub with a power storage device, but this solution requires a lot of space and is expensive.

[0004] The aim is to provide a method for electronic shift control of a vehicle's jaw clutch structure, particularly regarding how to avoid shift failure and how to implement it at a low cost. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides an electronic shift control method for a vehicle jaw structure, which aims to avoid shift failure and is implemented at a low cost.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a vehicle jaw clutch structure electronic shift control method, comprising:

[0007] Calibrate the pre-engagement angle A and shift angle B on the CVT transmission assembly;

[0008] VCU receives the gear shift request;

[0009] VCU sends a shift command to ERSU;

[0010] ERSU executes the pre-engagement angle A, engagement angle B, and disengagement angle A+B;

[0011] ERSU monitors the driven cone speed of the CVT transmission assembly via TCU;

[0012] The ERSU sends feedback on the shift status to the VCU.

[0013] The VCU gear position determination includes: whether to receive a gear shift request, and the gear shift request type is H / N / L.

[0014] The VCU sends commands to the ERSU, including: sending commands to switch to H gear, sending commands to switch to N gear, and sending commands to switch to L gear.

[0015] The ERSU receives shift commands from the VCU, including: switching to H gear, switching to N gear, and switching to L gear.

[0016] After receiving the shift command from the VCU, the shifting actions that the ERSU needs to perform include:

[0017] Receives H gear shift command, pre-engages H gear, pre-engage angle is A;

[0018] Receives L gear shift command, pre-engages L gear, and the pre-engagement angle is A;

[0019] Receives the N gear shift command, shifts to N gear, and the shift angle is A+B during the shift.

[0020] After the ERSU is pre-engaged in H / L gear, the TCU monitors the driven cone wheel speed in real time. When the driven cone wheel speed is greater than or equal to the set value, the ERSU executes the next gear shifting action; otherwise, no action is executed.

[0021] The setting value is 5 rpm.

[0022] The ERSU performs another gear shift, that is, it performs a gear shift angle B.

[0023] After the ERSU completes the VCU instruction, it needs to send a shift status signal back to the VCU.

[0024] The electronic shift control method for vehicle jaw structure of the present invention has the following beneficial effects:

[0025] 1. It can avoid gear shifting failure due to tooth jamming during gear shifting, thus improving reliability;

[0026] 2. It can optimize the shifting structure, reduce the cost of the shifting structure, and enhance the product's market competitiveness. Attached Figure Description

[0027] This manual includes the following figures, which illustrate the following:

[0028] Figure 1 This is the H / L switching logic diagram of the electronic gear shifting structure of the vehicle jaws of the present invention;

[0029] Figure 2 This is a schematic diagram of the electronic shifting L-gear structure of the vehicle jaws of the present invention;

[0030] Figure 3 This is a test diagram of the electronic gear shifting L-gear switching function of the vehicle's jaw structure according to an embodiment of the present invention.

[0031] Figure 4This is a schematic diagram of the electronic gear shifting H-gear structure of the vehicle's jaw mechanism according to an embodiment of the present invention;

[0032] Figure 5 This is a test diagram of the electronic gear shifting H-gear switching function of the vehicle's gear-clamping structure according to an embodiment of the present invention.

[0033] Figure 6 This is the N-gear switching logic diagram;

[0034] Figure 7 This is a schematic diagram of the top teeth of a vehicle's gear shifting mechanism during the shifting process.

[0035] The markings in the diagram are: 1. Gear sleeve; 2. Shift gear. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0037] This invention provides a method for electronic shift control of a vehicle's jaw clutch structure, comprising:

[0038] Calibrate the pre-engagement angle A and shift angle B on the CVT transmission assembly;

[0039] VCU (Vehicle Controller Unit) receives gear shift requests;

[0040] The VCU sends a shift command to the ERSU (Electronic Shift Unit);

[0041] ERSU executes the pre-engagement angle A, engagement angle B, and disengagement angle A+B;

[0042] The ERSU monitors the driven cone speed of the CVT transmission assembly via the TCU (Transmission Control Unit);

[0043] The ERSU sends feedback on the shift status to the VCU.

[0044] Specifically, in this invention, when the vehicle is stationary, the driver sends a shift (H / L) command to the VCU via the shift lever / button or other means. Upon receiving the shift command, the VCU sends a shift command to the ERSU. The ERSU, upon receiving the VCU command, performs a pre-engagement (pre-engagement angle A). After pre-engagement, it sends a shift completion signal back to the VCU. At this time, the driver accelerates by pressing the accelerator pedal, engaging the clutch of the CVT transmission assembly. The engine speed is transmitted to the driven cone pulley of the CVT transmission assembly. The TCU sends the driven cone pulley speed to the ERSU. When the driven cone pulley speed is greater than or equal to a set value, the ERSU performs another shift (shift angle B) to complete the shift. Alternatively, when the vehicle is stationary, the driver sends a shift (N) command to the VCU via the shift lever / button or other means. Upon receiving the shift command, the VCU sends a shift command to the ERSU. The ERSU, upon receiving the VCU command, performs a disengagement (disengagement angle A+B) and sends a shift completion signal back to the VCU. The electronic shift control method for the toothed clutch structure provided by this invention has lower requirements for the shift mechanism, does not require the design of a power storage device, optimizes the shift structure, and saves product space requirements and production costs.

[0045] The CVT transmission assembly includes a driving cone pulley, a driven cone pulley, and a ring-shaped drive belt mounted on both pulleys. One end of the clutch is connected to the driving cone pulley, and the other end is connected to the engine. The clutch is configured to control the engagement and disengagement of the driving cone pulley from the engine. By controlling the engagement and disengagement of the clutch, the power transmission between the driving cone pulley and the engine can be controlled.

[0046] In this invention, relevant shift angles need to be calibrated on the CVT transmission assembly. The shift angles mainly include the pre-engagement angle A and the shift angle B.

[0047] In this invention, the VCU gear position determination includes: whether a gear position switching request is received, and the gear position switching request type is H / N / L.

[0048] In this invention, the VCU sends relevant instructions to the ERSU based on the received gear shift request. The instructions sent by the VCU to the ERSU include: sending instructions to switch to H gear (high gear), sending instructions to switch to N gear (neutral gear), and sending instructions to switch to L gear (low gear).

[0049] In this invention, the ERSU receives VCU shift commands including: switching to H gear, switching to N gear, and switching to L gear.

[0050] The VCU receives gear shift requests based on the driver's operation. The request information includes: shifting to H gear, shifting to N gear, and shifting to L gear.

[0051] In this invention, after the ERSU receives the VCU shift command, the shifting actions it needs to perform include:

[0052] In this invention, the H-gear shift command is received, and the H-gear is pre-engaged at a pre-engagement angle of A.

[0053] In this invention, an L-gear shift command is received, and L-gear is pre-engaged at a pre-engagement angle of A.

[0054] In this invention, an N-gear shift command is received, and the gear is switched to N. The angle of disengagement during the shift is A+B.

[0055] In this invention, after the ERSU is pre-engaged in H / L gear, the TCU monitors the driven cone wheel speed in real time and determines its speed value. When the driven cone wheel speed is ≥ the set value, the ERSU executes the next gear shifting action; otherwise, no action is executed.

[0056] In this invention, the set value is 5 rpm.

[0057] In this invention, when the driven cone wheel speed is ≥5 rpm, ERSU performs another gear shifting action, that is, performs a gear shifting angle B.

[0058] In this invention, after the ERSU completes the VCU instruction, it needs to send a shift status signal back to the VCU.

[0059] Example 1

[0060] like Figures 2 to 4 This invention provides a method for electronic shift control of a vehicle's jaw clutch structure, comprising the following steps:

[0061] Calibrate the pre-engagement angle A and shift angle B on the CVT transmission assembly;

[0062] The VCU receives a gear shift request, the request information of which includes: switch to L gear;

[0063] The VCU sends a shift command to the ERSU; after receiving the L gear shift command, the ERSU controls the ERSU to rotate counterclockwise (towards the rear of the ERSU);

[0064] The electronic shift actuator drives the shift shaft to rotate clockwise by 12° (12° is the pre-engagement angle A, which is the calibrated value); the shift finger is fixed to the shift shaft, and the shift finger drives the shift fork shaft and shift fork to move downward; the shift fork drives the gear sleeve to move downward, eliminating the gap between the gear sleeve and the end face of the shift gear.

[0065] The ERSU feeds back to the VCU to complete the L gear shift; the driver presses the accelerator pedal, and the CVT transmission controls the clutch to close; the engine speed is transmitted to the CVT transmission assembly, and the driven cone pulley rotates;

[0066] ERSU monitors the driven cone wheel speed in real time via the transmission TCU;

[0067] When the driven cone wheel speed is ≥5 rpm, the ERSU performs the shifting action again to complete the shifting, and the shifting angle is 34° (34° is the shifting angle B, which is the calibrated value);

[0068] The ERSU sends feedback on the shift status to the VCU.

[0069] Example 2

[0070] like Figure 2 , Figure 5 and Figure 6 This invention provides a method for electronic shift control of a vehicle's jaw clutch structure, comprising the following steps:

[0071] Calibrate the pre-engagement angle A and shift angle B on the CVT transmission assembly;

[0072] The VCU receives a gear shift request, the request information of which includes: switch to H gear;

[0073] The VCU sends a shift command to the ERSU; after receiving the command to switch to H gear, the ERSU controls the ERSU to rotate clockwise (towards the rear of the ERSU);

[0074] The electronic shift actuator drives the shift shaft to rotate clockwise by 12° (12° is the pre-engagement angle A, which is the calibrated value); the shift finger is fixed to the shift shaft, and the shift finger drives the shift fork shaft and shift fork to move upward; the shift fork drives the gear sleeve to move upward, eliminating the gap between the gear sleeve and the end face of the shift gear.

[0075] The ERSU feeds back to the VCU to complete the H gear shift; the driver presses the accelerator pedal, and the CVT transmission controls the clutch to close; the engine speed is transmitted to the CVT transmission assembly, and the driven cone pulley rotates;

[0076] ERSU monitors the driven cone wheel speed in real time via the transmission TCU;

[0077] When the driven cone wheel speed is ≥5 rpm, the ERSU performs the shifting action again to complete the shifting, and the shifting angle is 16° (16° is the shifting angle B, which is the calibrated value);

[0078] The ERSU sends feedback on the shift status to the VCU.

[0079] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A method for electronic gear shifting control of a vehicle's jaw clutch structure, characterized in that, include: Calibrate the pre-engagement angle A and shift angle B on the CVT transmission assembly; VCU receives the gear shift request; VCU sends a shift command to ERSU; ERSU executes the pre-engagement angle A, engagement angle B, and disengagement angle A+B; ERSU monitors the driven cone speed of the CVT transmission assembly via TCU; The ERSU sends feedback on the shift status to the VCU.

2. The electronic shift control method for a vehicle jaw structure according to claim 1, characterized in that, The VCU gear position determination includes: whether to receive a gear shift request, and the gear shift request type is H / N / L.

3. The electronic shift control method for a vehicle jaw structure according to claim 1, characterized in that, The VCU sends commands to the ERSU, including: sending commands to switch to H gear, sending commands to switch to N gear, and sending commands to switch to L gear.

4. The electronic shift control method for a vehicle jaw structure according to any one of claims 1 to 3, characterized in that, The ERSU receives shift commands from the VCU, including: switching to H gear, switching to N gear, and switching to L gear.

5. The electronic shift control method for a vehicle jaw structure according to claim 4, characterized in that, After receiving the shift command from the VCU, the shifting actions that the ERSU needs to perform include: Receives H gear shift command, pre-engages H gear, pre-engage angle is A; Receives L gear shift command, pre-engages L gear, and the pre-engagement angle is A; Receives the N gear shift command, shifts to N gear, and the shift angle is A+B during the shift.

6. The electronic shift control method for a vehicle jaw structure according to claim 5, characterized in that, After the ERSU is pre-engaged in H / L gear, the TCU monitors the driven cone wheel speed in real time. When the driven cone wheel speed is greater than or equal to the set value, the ERSU executes the next gear shifting action; otherwise, no action is executed.

7. The electronic shift control method for a vehicle jaw structure according to claim 6, characterized in that, The setting value is 5 rpm.

8. The electronic shift control method for a vehicle jaw structure according to any one of claims 1 to 7, characterized in that, The ERSU performs another gear shift, that is, it performs a gear shift angle B.

9. The electronic shift control method for a vehicle jaw structure according to any one of claims 1 to 7, characterized in that, After the ERSU completes the VCU instruction, it needs to send a shift status signal back to the VCU.

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