Vehicle and transmission reverse gear synchronizing system

Abstract

The invention belongs to the technical field of manual transmissions, and particularly relates to a vehicle and transmission reverse gear synchronizing system. The system comprises a controller and an intermediate shaft braking device, the controller is used for sending a control instruction to the intermediate shaft braking device when detecting that an engine is in a running state, the vehicle speed is smaller than a set value and a clutch is in an open working state, and the intermediate shaft braking device is used for applying braking force to a transmission intermediate shaft after receiving the control instruction. The rotation speed synchronization means that the rotation speed difference is smaller than a set threshold value; and when the clutch is detected to return or the vehicle speed is larger than or equal to the set value, the intermediate shaft braking device stops applying braking force to the transmission intermediate shaft. The problem that impact sound occurs in the gear meshing process due to the fact that the rotating speed difference between the reverse gear and the reverse intermediate gear on the intermediate shaft is too large is solved, and the reverse gear synchronizing structure is simple only by being matched with the intermediate shaft.

Description

Technical Field

[0001] The invention belongs to the technical field of manual transmissions, and in particular relates to a vehicle and transmission reverse gear synchronization system. Background Art

[0002] In the commercial vehicle industry, the forward gear of the manual transmission of the car has a synchronizer for meshing, but the reverse gear generally does not have a reverse synchronizer structure due to its complex structure and low frequency of use. Therefore, when the vehicle is in reverse gear, since there is no reverse synchronizer, when the clutch is pressed to quickly shift into reverse gear, the speed difference between the intermediate shaft and the reverse gear inside the transmission is large, and the reverse gear is not easy to mesh with the reverse intermediate gear set on the intermediate shaft, resulting in a knocking sound when quickly shifting into reverse gear, which affects the subjective feelings of the driver and passengers. Therefore, it is necessary to add a reverse gear synchronization control structure to the reverse gear of the transmission. The current reverse gear synchronization method is mainly to use a mechanical structure to synchronize the reverse gear by setting a complex reverse gear synchronization structure on the intermediate shaft and the input shaft. For example, the utility model patent with the announcement number CN207583884U discloses a new type of reverse gear synchronization structure of the transmission, which adds a reverse gear synchronization ring and a reverse gear synchronization cone on the basis of the original transmission. The upper end of the reverse gear synchronization cone is a circular ring structure, the lower end is a U-shaped structure, and the right side of the top end surface is provided with an outer cone surface. The lower end of the reverse gear synchronization cone is plugged into the intermediate shaft, and the upper end is sleeved on the input shaft; the reverse gear synchronization ring is sleeved on the input shaft and is arranged between the five-speed synchronizer assembly and the reverse gear synchronization cone. The lower end surface of the reverse gear synchronization ring is an inner cone surface, and the inner cone surface of the reverse gear synchronization ring is matched with the outer cone surface of the reverse gear synchronization cone. When the reverse gear is engaged, the slider of the five-speed synchronizer assembly pushes the reverse gear synchronization ring to move to the reverse gear side, and the speed difference is reduced by the friction between the inner cone surface of the reverse gear synchronization ring and the outer cone surface of the reverse gear synchronization cone, so as to achieve reverse gear synchronization. The reverse gear synchronization structure is complex and needs to be coordinated with the five-speed synchronizer assembly, the input shaft and the intermediate shaft during installation, which makes installation difficult. Summary of the invention

[0003] The object of the present invention is to provide a vehicle and transmission reverse gear synchronization system to solve the problem that the existing reverse gear synchronization structure is relatively complex and difficult to install.

[0004] In order to solve the above technical problems, the present invention provides a transmission reverse gear synchronization system, including a controller and an intermediate shaft braking device. The controller is used to send a control instruction to the intermediate shaft braking device when it detects that the engine state is running, the vehicle speed is less than a set value and the clutch working state is open. The intermediate shaft braking device is used to apply braking force to the transmission intermediate shaft after receiving the control instruction until the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear. Speed ​​synchronization means that the speed difference is less than a set threshold; when it is detected that the clutch is returned or the vehicle speed is greater than or equal to the set value, the intermediate shaft braking device stops applying braking force to the transmission intermediate shaft.

[0005] Furthermore, the intermediate shaft braking device includes a drive module and a brake, wherein the brake is used to be arranged on the intermediate shaft and is used to apply braking force to the intermediate shaft under the action of the drive module; the drive module is used to drive the brake to work when receiving a control instruction sent by the controller to reduce the speed of the intermediate shaft of the transmission.

[0006] Furthermore, the driving module is a telescopic driving structure.

[0007] Furthermore, the telescopic drive structure is a pneumatic cylinder drive structure, including an air intake pipe, a pneumatic cylinder and a piston rod arranged inside the pneumatic cylinder; the air intake pipe is used to connect to a high-pressure gas source, and a switch is provided on the air supply circuit between the high-pressure gas source and the air intake pipe. The switch is used to turn on the air supply circuit when receiving a control instruction sent by the controller, and control the high-pressure gas in the high-pressure gas source to enter the pneumatic cylinder through the air intake pipe, so that the piston rod inside the pneumatic cylinder drives the brake to work.

[0008] Furthermore, the switch is a solenoid valve.

[0009] The beneficial effects of the above technical solution are as follows: the present invention is a pioneering invention. In view of the problem that the reverse gear synchronization structure of the manual transmission is relatively complicated, it is only necessary to add an intermediate shaft braking device to the intermediate shaft, and determine whether a reverse gear signal is detected through a controller. When the controller detects a reverse gear signal, it directly sends a control instruction to the intermediate shaft braking device to control the intermediate shaft braking device to start working and apply braking force to the intermediate shaft, thereby quickly reducing the speed of the intermediate shaft of the transmission until the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, so that the reverse gear can be smoothly meshed. This not only solves the problem that when a manual transmission without a reverse gear synchronizer is reversed, the reverse gear and the reverse gear intermediate gear on the intermediate shaft have a knocking sound during the gear meshing process due to the large speed difference, but also there is no need to set a complex matching structure on the intermediate shaft and the input shaft, and it only needs to cooperate with the intermediate shaft, and the reverse gear synchronization structure is relatively simple.

[0010] To solve the above technical problems, the present invention also provides a vehicle, including a transmission, wherein the transmission adopts a transmission reverse gear synchronization system for reverse gear synchronization control, and the transmission reverse gear synchronization system includes a controller and an intermediate shaft braking device. The controller is used to send a control instruction to the intermediate shaft braking device when it detects that the engine state is running, the vehicle speed is less than a set value and the clutch working state is open. The intermediate shaft braking device is used to apply braking force to the intermediate shaft of the transmission after receiving the control instruction until the speed of the reverse intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, and the speed synchronization means that the speed difference is less than a set threshold; when it is detected that the clutch returns or the vehicle speed is greater than or equal to the set value, the intermediate shaft braking device stops applying braking force to the intermediate shaft of the transmission.

[0011] Furthermore, the intermediate shaft braking device includes a drive module and a brake, wherein the brake is used to be arranged on the intermediate shaft and is used to apply braking force to the intermediate shaft under the action of the drive module; the drive module is used to drive the brake to work when receiving a control instruction sent by the controller to reduce the speed of the intermediate shaft of the transmission.

[0012] Furthermore, the driving module is a telescopic driving structure.

[0013] Furthermore, the telescopic drive structure is a pneumatic cylinder drive structure, including an air intake pipe, a pneumatic cylinder and a piston rod arranged inside the pneumatic cylinder; the air intake pipe is used to connect to a high-pressure gas source, and a switch is provided on the air supply circuit between the high-pressure gas source and the air intake pipe. The switch is used to turn on the air supply circuit when receiving a control instruction sent by the controller, and control the high-pressure gas in the high-pressure gas source to enter the pneumatic cylinder through the air intake pipe, so that the piston rod inside the pneumatic cylinder drives the brake to work.

[0014] Furthermore, the controller is a vehicle controller or an engine controller of the vehicle.

[0015] The beneficial effects of the above technical scheme are as follows: the present invention is a pioneering invention, which aims at the reverse gear problem of a vehicle equipped with a manual transmission and the relatively complicated reverse gear synchronization structure of the manual transmission. It is only necessary to add an intermediate shaft braking device to the intermediate shaft, and determine whether a reverse gear signal is detected through a controller. When the controller detects a reverse gear signal, it directly sends a control instruction to the intermediate shaft braking device to control the intermediate shaft braking device to start working and apply braking force to the intermediate shaft, thereby quickly reducing the speed of the intermediate shaft of the transmission until the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, so that the reverse gear can be smoothly meshed. This not only solves the problem of the reverse gear and the reverse gear intermediate gear on the intermediate shaft causing a knocking sound during the gear meshing process due to the large speed difference when the manual transmission without a reverse gear synchronizer is reversed, but also does not require a complex matching structure to be set on the intermediate shaft and the input shaft, and only needs to cooperate with the intermediate shaft, so that the reverse gear synchronization structure is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a control principle diagram of a transmission reverse gear synchronization system of a vehicle embodiment of the present invention; Figure 2 It is a schematic structural diagram of an intermediate shaft braking device of a vehicle embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings.

[0018] The present invention aims to solve the problem that the reverse gear synchronization structure of the manual transmission is relatively complicated. It only needs to add an intermediate shaft braking device to the intermediate shaft, and judge whether a reverse gear signal is detected through a controller. When the controller detects the reverse gear signal, it directly sends a control instruction to the intermediate shaft braking device to control the intermediate shaft braking device to start working and apply braking force to the intermediate shaft, thereby quickly reducing the rotation speed of the intermediate shaft of the transmission until the rotation speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the rotation speed of the reverse gear, so that the reverse gear can be smoothly meshed. This not only solves the problem that when a manual transmission without a reverse gear synchronizer is reversed, there is a knocking sound in the gear meshing process due to the excessive speed difference between the reverse gear and the reverse gear intermediate gear on the intermediate shaft, which improves the subjective experience of the driver and passengers, but there is no need to set a complex matching structure on the intermediate shaft and the input shaft, and it only needs to cooperate with the intermediate shaft, so the reverse gear synchronization structure is relatively simple.

[0019] Vehicle Example A vehicle of the present invention is provided with a transmission, which is a manual transmission. When the vehicle is in reverse gear, a transmission reverse gear synchronization system is used to perform reverse gear synchronization control. The transmission reverse gear synchronization system includes a controller and an intermediate shaft braking device. Figure 1 and Figure 2 As shown, the controller determines whether a reverse gear signal is detected according to the vehicle conditions. Specifically, the controller receives signals such as vehicle speed, engine state and clutch working state, and comprehensively determines whether the vehicle has a reverse gear signal according to these signals. When the controller simultaneously receives that the engine state is running (ON), the vehicle speed is less than a set value (such as 2km / h) and the clutch working state is open, the controller determines that a reverse gear signal is detected, and outputs a control instruction to the intermediate shaft brake device, thereby controlling the intermediate shaft brake device to start braking the intermediate shaft. The intermediate shaft brake device includes a drive module and a brake. The brake is arranged on the intermediate shaft and is used to apply a braking force to the intermediate shaft under the action of the drive module; the drive module is used to drive the brake to work when receiving the control instruction sent by the controller, apply a braking force to the transmission intermediate shaft, and quickly reduce the speed of the transmission intermediate shaft until the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, so that the reverse gear can be smoothly engaged and the impact sound of the reverse gear is eliminated. Speed ​​synchronization means that the speed difference is less than the set threshold, that is, speed synchronization includes speed consistency and speed proximity. In this embodiment, the set threshold is 200rpm.

[0020] In this embodiment, the drive module is a telescopic drive structure, such as a hydraulic cylinder drive structure and a pneumatic cylinder drive structure. Preferably, the telescopic drive structure is a pneumatic cylinder drive structure, including a switch, an air intake pipe, a pneumatic cylinder, and a piston rod arranged inside the pneumatic cylinder. The air intake pipe is used to connect a high-pressure gas source, and the switch is arranged on the air supply circuit between the high-pressure gas source and the air intake pipe of the pneumatic cylinder. The switch is used to conduct the air supply circuit when receiving a control instruction sent by the controller, so that the high-pressure gas in the high-pressure gas source enters the pneumatic cylinder through the air intake pipe, thereby pushing the piston rod in the pneumatic cylinder to extend, and then pushing the brake to work, applying braking force to the intermediate shaft of the transmission, quickly reducing the speed of the intermediate shaft, and controlling the speed of the reverse gear intermediate gear on the intermediate shaft to be synchronized with the speed of the reverse gear, thereby eliminating the impact sound when the reverse gear is engaged. When the gear shifting process is completed, the clutch returns to its position or the vehicle speed is greater than or equal to the set value, the controller sends an instruction to control the intermediate shaft brake device to stop applying braking force to the intermediate shaft of the transmission. The high-pressure gas source can use an existing gas source device of the vehicle, such as a brake gas source used for braking of the vehicle.

[0021] In a specific embodiment, the brake includes a gear, the brake gear is rigidly connected to the intermediate shaft, and is arranged at a position corresponding to the piston rod. When the switch receives a control instruction sent by the controller, the air supply circuit is turned on, so that the high-pressure gas in the high-pressure gas source enters the pneumatic cylinder through the intake pipe and pushes the piston rod in the pneumatic cylinder to extend, so that the piston rod and the brake gear at the corresponding position of the transmission intermediate shaft are in friction contact, thereby applying a braking force to the brake gear to reduce the speed of the brake gear, thereby driving the intermediate shaft speed to reduce rapidly, so that the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, thereby eliminating the impact sound when the reverse gear is engaged.

[0022] Preferably, the switch is a solenoid valve. When the controller determines that a reverse gear signal appears according to the vehicle conditions, the solenoid valve is controlled to open the air supply circuit, thereby controlling the opening time of the brake until the speed of the reverse gear intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear, and the solenoid valve is controlled to close the air supply circuit to achieve precise control of reverse gear synchronization. When the shifting process is completed, the clutch returns to its position or the vehicle speed is greater than or equal to the set value, the controller sends a command to the solenoid valve to control the solenoid valve to close, so that the air supply circuit between the high-pressure air source and the air intake pipe of the pneumatic cylinder is cut off, the piston rod returns to the initial position inside the pneumatic cylinder, and stops applying braking force to the brake gear.

[0023] Furthermore, in order to make the transmission reverse gear synchronization system more efficient and reliable and reduce system costs, the controller is a vehicle controller or an engine controller of the vehicle.

[0024] System Example A transmission reverse gear synchronization system of the present invention is used for performing reverse gear synchronization control when the vehicle is in reverse gear. The transmission reverse gear synchronization system is the transmission reverse gear synchronization system described in the above vehicle embodiment and will not be described in detail here.

Claims

1. A transmission reverse gear synchronization system, characterized in that: It includes a controller and an intermediate shaft brake device. The controller is used to send a control command to the intermediate shaft brake device when it detects that the engine state is running, the vehicle speed is less than a set value and the clutch working state is open. The intermediate shaft brake device is used to apply braking force to the intermediate shaft of the transmission after receiving the control command until the speed of the reverse intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear. Speed ​​synchronization means that the speed difference is less than a set threshold. When it is detected that the clutch returns to its position or the vehicle speed is greater than or equal to the set value, the intermediate shaft brake device stops applying braking force to the intermediate shaft of the transmission.

2. The transmission reverse gear synchronization system according to claim 1, characterized in that: The intermediate shaft braking device includes a driving module and a brake. The brake is used to be arranged on the intermediate shaft and is used to apply braking force to the intermediate shaft under the action of the driving module. The driving module is used to drive the brake to work when receiving a control instruction sent by the controller to reduce the speed of the intermediate shaft of the transmission.

3. The transmission reverse gear synchronization system according to claim 2, characterized in that: The driving module is a telescopic driving structure.

4. The transmission reverse gear synchronization system according to claim 3, characterized in that: The telescopic driving structure is a pneumatic cylinder driving structure, including an air intake pipe, a pneumatic cylinder and a piston rod arranged inside the pneumatic cylinder; the air intake pipe is used to connect to a high-pressure gas source, and a switch is provided on the air supply circuit between the high-pressure gas source and the air intake pipe. The switch is used to open the air supply circuit when receiving a control instruction sent by a controller, and control the high-pressure gas in the high-pressure gas source to enter the pneumatic cylinder through the air intake pipe, so that the piston rod inside the pneumatic cylinder drives the brake to work.

5. The transmission reverse gear synchronization system according to claim 4, characterized in that: The switch is a solenoid valve.

6. A vehicle comprising a transmission, characterized in that: The transmission adopts a transmission reverse gear synchronization system for reverse gear synchronization control. The transmission reverse gear synchronization system includes a controller and an intermediate shaft braking device. The controller is used to send a control instruction to the intermediate shaft braking device when it detects that the engine state is running, the vehicle speed is less than a set value and the clutch working state is open. The intermediate shaft braking device is used to apply braking force to the transmission intermediate shaft after receiving the control instruction until the speed of the reverse intermediate gear on the intermediate shaft is synchronized with the speed of the reverse gear. Speed ​​synchronization means that the speed difference is less than a set threshold; when it is detected that the clutch is returned or the vehicle speed is greater than or equal to the set value, the intermediate shaft braking device stops applying braking force to the transmission intermediate shaft.

7. The vehicle according to claim 6, characterized in that The intermediate shaft braking device includes a driving module and a brake. The brake is used to be arranged on the intermediate shaft and is used to apply braking force to the intermediate shaft under the action of the driving module. The driving module is used to drive the brake to work when receiving a control instruction sent by the controller to reduce the speed of the intermediate shaft of the transmission.

8. The vehicle according to claim 7, characterized in that The driving module is a telescopic driving structure.

9. The vehicle according to claim 8, characterized in that The telescopic driving structure is a pneumatic cylinder driving structure, including an air intake pipe, a pneumatic cylinder and a piston rod arranged inside the pneumatic cylinder; the air intake pipe is used to connect to a high-pressure gas source, and a switch is provided on the air supply circuit between the high-pressure gas source and the air intake pipe. The switch is used to open the air supply circuit when receiving a control instruction sent by a controller, and control the high-pressure gas in the high-pressure gas source to enter the pneumatic cylinder through the air intake pipe, so that the piston rod inside the pneumatic cylinder drives the brake to work.

10. The vehicle according to claim 6, characterized in that The controller is a vehicle controller or an engine controller of the vehicle.

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