A deceleration control method for an amphibious vehicle when sailing on water

Abstract

The present invention provides a deceleration control method for an amphibious vehicle when sailing on water. The amphibious vehicle driven by a jet pump and equipped with a reverse bucket can automatically control the jet pump speed and the reverse bucket position according to the land driving habits through the brake pedal and the control unit according to the brake pedal signal and the speed signal to obtain appropriate braking force, thereby achieving the deceleration and parking effect of the amphibious vehicle during the water driving process. This control method can intelligently adjust the braking effect to meet the driving requirements, make up for the driver's lack of experience, simplify the driver's operation difficulty, and improve the safety of the amphibious vehicle when sailing on the water.

Description

Technical Field

[0001] The invention belongs to the field of special vehicles, and in particular relates to a deceleration control method for an amphibious vehicle when sailing on water. Background Art

[0002] Amphibious vehicles have the maneuverability and flexibility of land vehicles and can travel directly on water. They have important strategic significance and have developed rapidly.

[0003] The change of the land / water driving state of amphibious vehicles involves different driving operating systems. When driving on land, the braking system can be controlled to act on the wheels to generate braking force, reduce the speed of the vehicle to ensure driving safety; when driving on the water, if you want to slow down, you usually increase the resistance of the vehicle in the water by swinging the rudder left and right, or slow down by dropping anchor, or manually control the speed of the jet pump and cooperate with the reverse navigation device to achieve reverse drive to achieve the purpose of deceleration. Regardless of which of the above operations, they all require high skills and have certain limitations, and also have certain risks. If some operating devices and related signals can be shared and automatic control can be implemented, the vehicle system structure can be simplified, and the driver's land driving habits can be adapted to reduce the difficulty of operation. Summary of the invention

[0004] The purpose of the present invention is to provide an amphibious vehicle driving mode judgment and automatic control method. This control method is mainly aimed at amphibious vehicles driven by a jet pump and equipped with a reverse bucket. It can follow land driving habits and automatically control the jet pump speed and the reverse bucket position according to the brake pedal signal and the speed signal through the control unit to achieve safe deceleration and parking during water driving.

[0005] In order to realize the above-mentioned technical features, the purpose of the present invention is realized as follows: a deceleration control method for an amphibious vehicle when sailing on water, based on an amphibious vehicle driven by a jet pump and equipped with a reverse bucket, follows the land driving habits, and actively controls the jet pump speed and the reverse bucket position according to the brake pedal signal and the speed signal through the control unit to obtain the appropriate braking force, thereby achieving the deceleration and parking effect of the amphibious vehicle during the water driving process.

[0006] A deceleration control method for an amphibious vehicle when sailing on water, the specific method is as follows:

[0007] When driving on the water, if the driver retracts the accelerator pedal, the speed of the jet pump will drop to the lowest stable speed, and the vehicle's driving effect will be minimal. At this time, the vehicle will start to slow down by relying on the water surface resistance.

[0008] Step 1: When the driver needs a greater deceleration, he presses the brake pedal according to the land driving habit. At this time, the wheel braking has no effect on the water speed, but the generated brake pedal signal is transmitted to the control unit, which controls the lowering of the reverse bucket, changes the direction of the water flow output by the spray pump, and controls the operation of the spray pump to obtain the reverse braking force, thereby achieving a deceleration effect;

[0009] Step 2: When the brake pedal is depressed, the speed of the injection pump no longer maintains the lowest stable speed, but is instead controlled by the control unit. The control unit actively adjusts the speed of the injection pump to obtain the corresponding braking deceleration according to the speed of the vehicle during braking and the opening of the brake pedal.

[0010] Step 3: When the speed drops to the speed corresponding to the lowest stable speed of the jet pump, in order to prevent the vehicle from turning into reverse sailing, the control unit needs to control the reverse bucket to gradually lift up, and dynamically adjust it to a suitable intermediate position according to the speed change, so that the backward water flow and the forward water flow offset each other, thereby achieving the vehicle stopping;

[0011] Step 4: When the driver releases the brake pedal, the control unit controls the reverse bucket to lift back to the original position. At this time, if the accelerator pedal is not pressed, the injection pump rotates at the lowest stable speed, the vehicle restores the minimum driving force, and remains in the inching state;

[0012] Step 5: If the vehicle needs to sail reversely on the water, the driver operates the reverse bucket to be lowered. If the brake pedal is pressed at this time, the control unit will control the reverse bucket to be lifted and generate the opposite driving force according to the above strategy, thereby forming a braking effect.

[0013] The specific process of step 2 is as follows:

[0014] Step 2.1, as the opening of the brake pedal increases, after the inverted cart is lowered, the control unit controls the corresponding speed of the spray pump to be higher, so that the generated water flow has a more significant braking effect on the inverted cart after turning;

[0015] Step 2.2, if the brake pedal opening remains unchanged, the higher the initial speed of the vehicle during braking, the higher the speed of the spray pump controlled by the control unit. As the braking process continues, the speed gradually decreases, and the control unit controls the speed of the spray pump to decrease accordingly, thereby obtaining a suitable braking effect.

[0016] This method has the following beneficial effects:

[0017] 1. By adopting the method of the present invention, during the land / water driving process, the vehicle can be controlled to produce a braking effect by using a brake pedal signal without operating other devices, thereby simplifying the system setting and reducing the complexity of the operation, and making the operation mode during water navigation more in line with vehicle driving habits.

[0018] 2. Actively control the speed of the jet pump and the opening of the reverse bucket according to the brake pedal opening and speed information, so as to intelligently adjust the braking effect to meet driving needs, make up for the driver's lack of experience, simplify the driver's operation difficulty, and improve the safety of amphibious vehicles when sailing on the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a control flow chart of the present invention.

[0021] Figure 2 It is a simplified diagram of the control system of the present invention. DETAILED DESCRIPTION

[0022] The following is a further description in conjunction with specific implementation methods.

[0023] Embodiment 1:

[0024] When an amphibious vehicle is driving normally on the water, if the driver retracts the accelerator pedal, the jet pump speed will drop to the lowest stable speed accordingly, and the vehicle driving effect will be minimal. At this time, it will start to slow down by relying on the water surface resistance.

[0025] See also Figure 1-2 When a greater deceleration is required, it can be achieved through the following control method:

[0026] Step 1: When the driver needs a greater deceleration, he presses the brake pedal according to the land driving habit. At this time, the wheel braking has no effect on the water speed, but the generated brake pedal signal is transmitted to the control unit, which controls the lowering of the reverse bucket, changes the direction of the water flow output by the spray pump, and controls the operation of the spray pump to obtain the reverse braking force, thereby achieving a deceleration effect;

[0027] Step 2: When the brake pedal is pressed, the speed of the injection pump no longer maintains the lowest stable speed, but is controlled by the control unit. The control unit actively adjusts the speed of the injection pump to obtain the corresponding braking deceleration according to the speed of the vehicle during braking and the opening of the brake pedal:

[0028] Step 2.1, as the opening of the brake pedal increases, after the inverted cart is lowered, the control unit controls the corresponding speed of the spray pump to be higher, so that the generated water flow has a more significant braking effect on the inverted cart after turning;

[0029] Step 2.2, if the brake pedal opening remains unchanged, the higher the initial speed of the vehicle during braking, the higher the speed of the spray pump controlled by the control unit. As the braking process continues, the speed gradually decreases, and the control unit controls the speed of the spray pump to decrease accordingly, thereby obtaining a suitable braking effect.

[0030] Step 3: When the speed drops to the speed corresponding to the lowest stable speed of the jet pump, in order to prevent the vehicle from turning into reverse sailing, the control unit needs to control the reverse bucket to gradually lift up, and dynamically adjust it to a suitable intermediate position according to the speed change, so that the backward water flow and the forward water flow offset each other, thereby achieving the vehicle stopping;

[0031] Step 4: When the driver releases the brake pedal, the control unit controls the reverse bucket to lift back to the original position. At this time, if the accelerator pedal is not pressed, the injection pump rotates at the lowest stable speed, the vehicle restores the minimum driving force, and remains in the inching state;

[0032] Step 5: If the vehicle needs to sail reversely on the water, the driver operates the reverse bucket to be lowered. If the brake pedal is pressed at this time, the control unit will control the reverse bucket to be lifted and generate the opposite driving force according to the above strategy, thereby forming a braking effect.

Claims

1. A deceleration control method for an amphibious vehicle when sailing on water, characterized in that: Amphibious vehicles driven by jet pumps and equipped with inverted buckets follow the driving habits on land. The control unit actively controls the speed of the jet pumps and the position of the inverted bucket according to the brake pedal signal and the speed signal to obtain appropriate braking force, thereby achieving the deceleration and parking effect of the amphibious vehicle during surface driving. The specific method is as follows: When driving on the water, if the driver retracts the accelerator pedal, the speed of the jet pump will drop to the lowest stable speed, and the vehicle's driving effect will be minimal. At this time, the vehicle will start to slow down by relying on the water surface resistance. Step 1: When the driver needs a greater deceleration, he presses the brake pedal according to the land driving habit. At this time, the wheel braking has no effect on the water speed, but the generated brake pedal signal is transmitted to the control unit, which controls the lowering of the reverse bucket, changes the direction of the water flow output by the spray pump, and controls the operation of the spray pump to obtain the reverse braking force, thereby achieving a deceleration effect; Step 2: When the brake pedal is depressed, the speed of the injection pump no longer maintains the lowest stable speed, but is instead controlled by the control unit. The control unit actively adjusts the speed of the injection pump to obtain the corresponding braking deceleration according to the speed of the vehicle during braking and the opening of the brake pedal. Step 3: When the speed drops to the speed corresponding to the lowest stable speed of the jet pump, in order to prevent the vehicle from turning into reverse sailing, the control unit needs to control the reverse bucket to gradually lift up, and dynamically adjust it to a suitable intermediate position according to the speed change, so that the backward water flow and the forward water flow offset each other, thereby achieving the vehicle stopping; Step 4: When the driver releases the brake pedal, the control unit controls the reverse bucket to lift back to the original position. At this time, if the accelerator pedal is not pressed, the injection pump rotates at the lowest stable speed, the vehicle restores the minimum driving force, and remains in the inching state; Step 5: When the driver has lowered the reverse bucket and the vehicle is in reverse sailing, if the brake pedal is pressed at this time, the control unit will control the reverse bucket to be raised and generate an opposite driving force according to the above strategy, thereby forming a braking effect.

2. The deceleration control method for an amphibious vehicle when sailing on water according to claim 1, characterized in that: The specific process of step 2 is: Step 2.1, as the opening of the brake pedal increases, after the inverted cart is lowered, the control unit controls the corresponding speed of the spray pump to be higher, so that the generated water flow has a more significant braking effect on the inverted cart after turning; Step 2.2, if the brake pedal opening remains unchanged, the higher the initial speed of the vehicle during braking, the higher the speed of the spray pump controlled by the control unit. As the braking process continues, the speed gradually decreases, and the control unit controls the speed of the spray pump to decrease accordingly, thereby obtaining a suitable braking effect.

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