Method for controlling the state of an amphibious armored vehicle equipped with an at automatic transmission

Abstract

The application provides a state switching control method of an amphibious armored vehicle with an AT automatic transmission, which can realize integrated control of a water-land distributor and the AT automatic transmission, and the driver only needs to trigger the switch corresponding to the land mode or the water mode to automatically realize the switching function, so as to reduce the driver operation and reduce the operation failure. When the AT automatic transmission electronic control unit collects the water mode signal, the control process of switching from the land mode to the water mode is executed; when the AT automatic transmission electronic control unit collects the land mode signal, the switching process of switching from the water mode to the land mode is executed; meanwhile, the state monitoring can be performed, and the fault alarm can be performed when the water-land distributor switching is not in place.

Description

Technical Field

[0001] This invention relates to a vehicle state switching control method, specifically to a state switching control method for an amphibious armored vehicle equipped with an automatic transmission (AT), belonging to the field of vehicle transmission system control technology. Background Technology

[0002] Amphibious armored vehicles use amphibious transfer cases to deliver power to different paths to achieve both land and water modes. Traditional amphibious armored vehicle amphibious transfer cases use mechanical switching or independent control methods. When switching between water entry and exit states, the driver needs to perform a series of correct operations to ensure the function is realized. Misoperation can easily lead to switching failure. If the switching is not done properly, the automatic transmission will run at low speeds, resulting in insufficient lubrication and damage to the automatic transmission. Summary of the Invention

[0003] In view of this, the present invention proposes a state switching control method for amphibious armored vehicles equipped with an automatic transmission (AT). This method can achieve integrated control of the amphibious transfer case and the AT automatic transmission. When switching states, the driver only needs to trigger the switch corresponding to the land mode or the water mode to automatically achieve the switching function, reducing driver operation and minimizing operational errors.

[0004] The amphibious armored vehicle's state switching control method based on its automatic transmission (AT).

[0005] The AT automatic transmission electronic control unit triggers a state switching control process based on the collected mode status signals; the mode status signals include land mode signals and water mode signals;

[0006] When the AT automatic transmission electronic control unit receives the water mode signal, it executes the control process of switching from land mode to water mode:

[0007] First, restrict the automatic transmission to the starting gear;

[0008] Then, control the amphibious transfer case to switch to the water position and control the AT automatic transmission to return to neutral; when the automatic transmission input shaft speed is detected to be less than the set speed value A, control the gear control solenoid valve to de-energize, and then the amphibious armored vehicle enters the water mode.

[0009] When the AT automatic transmission electronic control unit receives the land mode signal, it executes the switching process from water mode to land mode:

[0010] First, control the amphibious transfer case to switch to the land position, and control the gear control solenoid valve of the AT automatic transmission to put the AT automatic transmission in neutral; when the input shaft speed of the AT automatic transmission is detected to be greater than or equal to the set speed value B, control the AT automatic transmission to engage the starting gear and limit it to the starting gear.

[0011] Then remove the gear restriction of the AT automatic transmission and restore land mode.

[0012] In a preferred embodiment of the present invention, during the process of the AT automatic transmission electronic control unit switching from land mode to water mode:

[0013] When the input shaft speed of the AT automatic transmission is detected to be greater than or equal to the set speed value A, it indicates that the amphibious transfer case is not properly switched and a fault alarm signal is issued.

[0014] As a preferred embodiment of the present invention: during the process of the AT automatic transmission electronic control unit performing the control of switching from water mode to land mode:

[0015] After controlling the amphibious transfer case to the land position and energizing the gear control solenoid valve of the AT automatic transmission to put the AT automatic transmission in neutral; if the input shaft speed of the AT automatic transmission is still less than the set speed value B after the set time interval, it indicates that the amphibious transfer case is not switched properly and a fault alarm signal is issued.

[0016] As a preferred embodiment of the present invention: the driver's compartment of the amphibious armored vehicle is provided with a mode status switch, the mode status switch including a land mode switch and a water mode switch; the AT automatic transmission electronic control unit collects the mode status signal input by the mode status switch.

[0017] As a preferred embodiment of the present invention, the AT automatic transmission electronic control unit acquires the mode status signal via the CAN bus.

[0018] Beneficial effects:

[0019] (1) The control method of the present invention can realize the integrated control of the land-water transfer case and the AT automatic transmission. When the state is switched, the driver only needs to trigger the switch corresponding to the land mode or the water mode, and the AT automatic transmission electronic control unit can automatically perform the switching process, reducing driver operation and reducing operation errors.

[0020] (2) The control method of the present invention can also monitor the switching status during the switching process. When the amphibious transfer case is not switched properly, it can promptly issue a fault alarm to avoid the automatic transmission running at low speed and causing damage to the automatic transmission when the switching is not properly performed. At the same time, it ensures the reliability and controllability of the switching process of amphibious armored vehicles.

[0021] (3) In the switching control method of the present invention, a transition mode is set during the switching process to play the role of initiating and connecting the water and land switching, thereby ensuring the reliability of the switching process. Attached Figure Description

[0022] Figure 1 This is a flowchart of the state switching control for an amphibious armored vehicle equipped with an automatic transmission (AT) according to the present invention. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and preferred embodiments, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the scope of protection of the present invention.

[0024] This embodiment provides a state switching control method for an amphibious armored vehicle equipped with an automatic transmission (AT). It can realize the integrated control of the amphibious transfer case and the AT automatic transmission. When switching states, the driver only needs to trigger the corresponding switch for the land mode or the water mode to automatically realize the switching function, reducing driver operation and reducing operational errors. At the same time, it can perform state monitoring and can issue a fault alarm when the amphibious transfer case is not switched properly.

[0025] like Figure 1 As shown, the specific process of the state switching control method for this amphibious armored vehicle equipped with an AT automatic transmission is as follows:

[0026] The automatic transmission electronic control unit (TCU) acquires mode status signals input from mode status switches via the CAN bus. These switches include a land mode switch and a water mode switch, with corresponding mode status signals including a land mode signal and a water mode signal. When the land mode switch is closed, a land mode signal is input; when the water mode switch is closed, a water mode signal is input. When the TCU detects a change in the mode status signal, it triggers a state switching control process. Specifically:

[0027] When the amphibious armored vehicle is in land mode, and the TCU detects a signal indicating water mode, it executes a control process to switch from land mode to water mode.

[0028] First, switch from land mode to transition mode: restrict the automatic transmission to starting gear;

[0029] Then, the transition mode is executed to the waterborne mode: the amphibious transfer case is switched to the waterborne position, and the automatic transmission is returned to neutral. When the input shaft speed of the automatic transmission is detected to be less than the set speed value A (200 r / min in this example, a test value), it indicates that the amphibious transfer case is switched in place. The gear control solenoid valve is de-energized, thus cutting off the power source to the input shaft of the automatic transmission. After this, the amphibious armored vehicle enters the waterborne mode. When the input shaft speed of the automatic transmission is detected to be greater than or equal to the set speed value A (200 r / min in this example), it indicates that the amphibious transfer case switching is not in place, and a fault alarm signal is issued.

[0030] When the amphibious armored vehicle is in water mode, and the TCU detects a land mode signal, it executes a switchover process from water mode to land mode:

[0031] First, the transition from water mode to transition mode is executed: the amphibious transfer case is switched to the land position, and the gear control solenoid valve of the automatic transmission is energized to put the automatic transmission in neutral; when the input shaft speed of the automatic transmission is detected to be greater than or equal to the set speed value B (550 r / min in this example), the automatic transmission is engaged in starting gear and locked in starting gear; if the input shaft speed of the automatic transmission is still less than the set speed value B after the set time interval, it indicates that the amphibious transfer case switching is not completed, and a fault alarm signal is issued; the set speed value B is the speed value that can establish working pressure. When switching from water mode to land mode, the input shaft speed of the automatic transmission needs to be greater than this speed value to establish working pressure.

[0032] Then, transition mode is executed to land mode: the gear restriction of the AT automatic transmission is canceled, and normal land driving function is restored.

[0033] The above control process is automatically performed by the AT automatic transmission electronic control unit (TCU) after acquiring the corresponding mode status signal, thereby realizing the automatic switching function.

[0034] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling the state switching of an amphibious armored vehicle equipped with an automatic transmission (AT), characterized in that: The AT automatic transmission electronic control unit triggers a state switching control process based on the collected mode status signals; the mode status signals include land mode signals and water mode signals; When the AT automatic transmission electronic control unit receives the water mode signal, it executes the control process of switching from land mode to water mode: First, restrict the automatic transmission to the starting gear; Then, control the amphibious transfer case to switch to the water position and control the AT automatic transmission to return to neutral; when the automatic transmission input shaft speed is detected to be less than the set speed value A, control the gear control solenoid valve to de-energize, and then the amphibious armored vehicle enters the water mode. When the AT automatic transmission electronic control unit receives the land mode signal, it executes the switching process from water mode to land mode: First, control the amphibious transfer case to switch to the land position, and control the gear control solenoid valve of the AT automatic transmission to put the AT automatic transmission in neutral; when the input shaft speed of the AT automatic transmission is detected to be greater than or equal to the set speed value B, control the AT automatic transmission to engage the starting gear and limit it to the starting gear. Then remove the gear restriction of the AT automatic transmission and restore land mode; During the process of the AT automatic transmission electronic control unit switching from land mode to water mode: When the input shaft speed of the AT automatic transmission is detected to be greater than or equal to the set speed value A, it indicates that the amphibious transfer case is not properly switched, and a fault alarm signal is issued. During the process of the AT automatic transmission electronic control unit switching from water mode to land mode: After controlling the amphibious transfer case to the land position and energizing the gear control solenoid valve of the AT automatic transmission to put the AT automatic transmission in neutral; if the input shaft speed of the AT automatic transmission is still less than the set speed value B after the set time interval, it indicates that the amphibious transfer case is not switched properly and a fault alarm signal is issued. The amphibious armored vehicle is equipped with a mode status switch in the driver's compartment, which includes a land mode switch and a water mode switch; the AT automatic transmission electronic control unit collects the mode status signal input from the mode status switch.

2. The amphibious armored vehicle state switching control method equipped with an AT automatic transmission as described in claim 1, characterized in that: The electronic control unit of the AT automatic transmission acquires mode status signals via the CAN bus.

Images