Control system and control method for lowering cargo compartment of dump truck

Abstract

The disclosed embodiment provides a control system for lowering the cargo compartment of a dump truck, including: a vehicle controller, which is used to receive the vehicle status information for logical judgment and output a driving signal according to the judgment result; a lowering solenoid valve, which receives the driving signal and controls the output of the control gas of the vehicle gas source; a three-way valve of the air pipe, whose automatic control interface is connected to the output port of the vehicle gas source, and is used to receive the gas output from the lowering solenoid valve; and a three-way valve, whose lowering channel is connected to the gas output port of the air pipe three-way valve, and whose oil return interface is connected to the lifting cylinder interface. The vehicle controller realizes the automatic lowering of the cargo compartment according to the judgment of the vehicle status, which not only enhances the safety of the dump truck, but also effectively prevents the road traffic accidents caused by the driver driving on the road without lowering the cargo compartment due to negligence, and also realizes the diversity of the cargo compartment lowering methods.

Description

Technical Field

[0001] The present disclosure relates to the technical field of dump truck cargo compartment control, and in particular to a method for controlling the descent of a dump truck cargo compartment. Background Art

[0002] The working principle of the lifting mechanism of dump trucks on the market is as follows: stop the car and put it in neutral gear, press the power take-off working switch, the power take-off is coupled with the gearbox, the power take-off solenoid valve is energized to control the air circuit so that the power take-off is combined with the lifting oil pump shaft, and the accelerator is pressed to increase the motor speed. At this time, the oil pump oil pressure is established. Then press the lifting button, the six-position three-way air control valve controls the three-position three-way valve lifting distribution valve, the oil pump interface in the three-position three-way valve is connected with the lifting cylinder interface, high-pressure oil enters the cylinder, lifts the cylinder, and the cargo compartment will rise; if the lifting button is not pressed, the three-position three-way valve maintains the initial state, the oil pump interface and the cylinder interface and the return oil interface are not connected, the cargo compartment will stay in the current lifting position, and it will remain the same after lifting to a certain height; the driver then disconnects the power take-off switch, and then shifts gears, and the dump truck can drive forward. Press the lifting mechanism down button, the lifting cylinder interface is connected with the oil return interface, and the cargo compartment can fall. The lowering process does not require the power take-off to work, and only the three-position six-way valve is needed to control the on-off of the three-position three-way valve. Figure 1 shown.

[0003] Since most of the unloading process requires the dump truck to lift the cargo box and drive forward a short distance to unload all the cargo, drivers often forget to lower the cargo box and drive away directly. When encountering a height-restricted road section, the truck box will hit the height-restricted building, causing a traffic accident, etc. This is not only likely to cause driver injuries, road buildings to be damaged, and other accidents, but also easily cause road traffic paralysis. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is: how to enhance the safety of drivers and vehicles.

[0005] In order to solve the above technical problems, the embodiment of the present disclosure provides a control system for lowering the cargo compartment of a dump truck, including: a vehicle controller, which is used to receive the vehicle status information for logical judgment and output a driving signal according to the result of the judgment; a descending solenoid valve, which receives the driving signal and controls the output of the control gas of the vehicle air source; an air pipe three-way valve, the automatic control interface of the air pipe three-way valve is connected to the output port of the vehicle air source, and is used to receive the gas output from the descending solenoid valve; and a three-position three-way valve, the descending channel of the three-position three-way valve is connected to the gas output port of the air pipe three-way valve, and the return oil interface of the three-position three-way valve is connected to the lifting cylinder interface.

[0006] In some embodiments, a manually controlled three-position six-way valve is also included, wherein the air inlet of the manually controlled three-position six-way valve is connected to the output port of the vehicle air source, and the air outlet of the manually controlled three-position six-way valve is connected to the manual control interface of the tracheal three-way valve.

[0007] In some embodiments, the status information includes: the status of the power take-off, the position status of the cargo compartment, the distance traveled from neutral gear to forward gear, the current vehicle speed and the current gear position.

[0008] A method for controlling the descent of a dump truck cargo compartment comprises the following steps:

[0009] The vehicle controller obtains the vehicle status information;

[0010] The vehicle controller determines the current state of the vehicle through the acquired state information;

[0011] If the current state of the vehicle is a stable state, the vehicle controller does not control the vehicle, and then returns to the step of the vehicle controller obtaining the state information of the vehicle; and

[0012] If the current state of the vehicle is an unstable state, the vehicle is converted from the unstable state to a stable state, and then returns to the step of the vehicle controller obtaining the state information of the vehicle.

[0013] In some embodiments, if the current state of the vehicle is an unstable state, the vehicle controller inputs the vehicle air source into the air pipe three-way valve via the descending solenoid valve, and then connects to the descending channel of the three-position three-way valve to convert the vehicle from an unstable state to a stable state, and then returns to the vehicle controller to obtain the vehicle state information; or

[0014] If the current state of the vehicle is an unstable state, the three-position six-way valve connects the vehicle's air source to the descending channel of the three-position three-way valve, converts the vehicle from an unstable state to a stable state, and then returns to the vehicle controller to obtain the vehicle's state information.

[0015] In some embodiments, if the current state of the vehicle is an unstable state, the vehicle controller limits the vehicle to a low-power state and at the same time the vehicle controller inputs the vehicle air source into the air pipe three-way valve via the descending solenoid valve, and then connects to the descending channel of the three-position three-way valve to convert the vehicle from an unstable state to a stable state, and then returns to the step of the vehicle controller obtaining the vehicle status information; or

[0016] If the current state of the vehicle is an unstable state, the vehicle controller will limit the vehicle to a low-power state and the three-position six-way valve will connect the vehicle's air source to the descending channel of the three-position three-way valve to convert the vehicle from an unstable state to a stable state. The vehicle controller then releases the vehicle's low-power state and returns to the step where the vehicle controller obtains the vehicle's status information.

[0017] In some embodiments, the low power state is when the vehicle operates at 50% of rated power.

[0018] In some embodiments, the unstable state satisfies the following conditions simultaneously: the power take-off switch is in the disconnected state, the cargo compartment is not in a horizontal position, the vehicle's driving distance from neutral to forward gear is greater than 50 meters, the vehicle speed is greater than 20 km / h, and the current gear is the forward gear.

[0019] In some embodiments, the stable state is a state where the cargo box is not in a horizontal position.

[0020] In some embodiments, an alarm step is also included, where the vehicle controller drives the vehicle fault status description to be sent to the instrument through the CAN network and displayed to the driver.

[0021] Through the above technical solution, the control system and control method for lowering the cargo compartment of a dump truck provided by the present disclosure have the following advantages compared with the prior art:

[0022] 1. Two parallel control methods, automatic vehicle controller and manual three-position six-way valve, are adopted to realize diversified control of cargo compartment lowering of dump trucks.

[0023] 2. Real-time monitoring of vehicle status information through the vehicle controller can effectively prevent road traffic accidents caused by driver negligence.

[0024] 3. When it is detected that the cargo compartment of the vehicle has not yet been lowered back to its original position, the vehicle controller can restrict the vehicle, thereby enhancing the safety of the dump truck.

[0025] 4. When it is detected that the cargo compartment of the vehicle has not yet been lowered back to its original position, a real-time alarm signal can be sent to the driver, so that the driver can deal with the situation in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the control flow of the lifting mechanism of a dump truck disclosed in the prior art;

[0028] Figure 2 is a control principle diagram of the lowering of the cargo compartment of a dump truck according to an embodiment of the present disclosure;

[0029] Figure 3It is a flow chart of the control method for lowering the cargo compartment of a dump truck according to the first and second embodiments of the present disclosure.

[0030] Description of reference numerals:

[0031] 1. Vehicle controller; 2. Lowering solenoid valve; 3. Three-position six-way valve; 4. Vehicle air source; 5. Air pipe three-way valve; 6. Three-position three-way valve. DETAILED DESCRIPTION

[0032] The embodiments of the present disclosure are further described in detail below in conjunction with the drawings and examples. The detailed descriptions of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0033] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0034] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0035] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0036] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0037] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0039] like Figure 2 As shown, the technical solution disclosed in the present invention is to add a tracheal three-way valve 5 and a descending solenoid valve 2 in front of the tracheal pipe of the descending channel of the upper three-way three-way valve 6, so as to connect the vehicle air source 4 to the descending channel of the three-way three-way valve 6. In this way, the vehicle air source 4 can be connected to the descending channel of the three-way three-way valve 6 through the manual three-way six-way valve 3, and the vehicle controller 1 can also automatically output a high-side drive signal after judging the state of the vehicle to control the descending solenoid valve 2 to connect the vehicle air source 4 through the tracheal three-way valve 5 to the descending channel of the three-way three-way valve 6, so as to control the connection of the return oil interface and the lifting cylinder interface, so that the high-pressure oil returns to the oil tank, and the oil pressure of the oil cylinder decreases, so that the cargo compartment descends.

[0040] Embodiment 1

[0041] The control method for lowering the cargo compartment of a dump truck provided by the present invention can be applied to a dump truck system, such as a dump truck control system. Figure 3 As shown, the method for controlling the descent of the dump truck cargo compartment provided in this embodiment may include the following steps.

[0042] In the first step, the vehicle controller 1 obtains the vehicle status information.

[0043] In this embodiment, the vehicle controller 1 obtains the vehicle status information through sensors. The preset sensors may be one or more sensors installed on the dump truck. The sensors may include angle sensors, gravity sensors, pressure sensors, displacement sensors, photoelectric sensors, position positioning modules such as GPS sensors, and speed sensors.

[0044] In this embodiment, the vehicle status information may include the status of the power take-off of the dump truck, the position status of the cargo compartment, the distance traveled from neutral gear to forward gear, the current vehicle speed and the current gear position, etc.

[0045] Corresponding to each of the above sensors, the status information of the corresponding vehicle of the dump truck obtained by the preset sensors is transmitted to the vehicle controller 1.

[0046] In the second step, the vehicle controller 1 determines the current state of the vehicle through the acquired state information, wherein the state information of the vehicle is associated with the pre-set information.

[0047] In this embodiment, the vehicle controller 1 can be a pre-set service system or a temporarily set server or device, which is mainly used to analyze, store and output the data provided by the sensor. In specific applications, the vehicle controller 1 can be provided by a dump truck operator, manager or third-party operator.

[0048] The state can be determined by directly comparing the state information with the numerical value of the characteristic data and / or establishing a preset analysis model. The preset analysis model can be a calculation model and / or a comparison model stored in the vehicle controller 1. In this embodiment, the characteristic data is data that characterizes the dump truck and / or its related mechanisms in a special state, which is reflected as a characteristic event of the dump truck and / or its related mechanisms. Therefore, each characteristic data and the corresponding characteristic event are pre-established with an associated relationship before the vehicle state information is analyzed using the preset analysis model.

[0049] If the current state of the vehicle is a stable state, the vehicle controller 1 does not control the vehicle, and then returns to the step of the vehicle controller 1 obtaining the state information of the vehicle.

[0050] In this step, the state information of the vehicle corresponding to the dump truck obtained by the sensor is transmitted to the vehicle controller 1, and then the vehicle controller 1 uses the preset analysis model to analyze the parameters in the vehicle state information to find the characteristic data corresponding to the parameters, and compares it with the value of the characteristic data to determine the type of event. Here, the vehicle controller 1 analyzes the received vehicle state information and determines that the current state of the vehicle is a stable state. In this embodiment, the stable state should be understood as the cargo compartment of the vehicle being in a horizontal state, that is, the cargo compartment is lowered to the initial position, rather than in an arbitrary lifting state. In this case, the vehicle controller 1 will not issue an operating instruction to the operating system and / or mechanism for the cargo compartment. At the same time, the vehicle controller 1 will continue to transmit the state information of the vehicle corresponding to the dump truck obtained by the sensor to it for uninterrupted monitoring. Until a special event and / or state is triggered.

[0051] If the current state of the vehicle is an unstable state, the vehicle is converted from the unstable state to a stable state, and then the process returns to the step of the vehicle controller 1 acquiring the state information of the vehicle.

[0052] In this step, the state information of the dump truck corresponding to the vehicle obtained by the sensor is transmitted to the vehicle controller 1, and then the vehicle controller 1 uses the preset analysis model to analyze the parameters in the vehicle state information to find the characteristic data corresponding to the parameters, and compares it with the value of the characteristic data to determine the type of event. Here, the vehicle controller 1 analyzes the received vehicle state information and determines that the current state of the vehicle is an unstable state. In this embodiment, the unstable state should be understood as: the power take-off switch is in the disconnected state, the cargo compartment is not in the horizontal position, the vehicle switches from the neutral gear to the forward gear and the driving distance is greater than 50 meters, the vehicle speed is greater than 20km / h, and the current gear is the forward gear. When the above five conditions are met at the same time, a special event and / or state is triggered, that is, the vehicle controller 1 determines that the cargo compartment of the vehicle is in a non-horizontal state, that is, the cargo compartment is not in the initial position, but in an arbitrary lifting state. At this time, if the vehicle continues to move forward in this state, when encountering a height-restricted section, the car compartment will hit the height-restricted building, causing a traffic accident. In this case, the vehicle controller 1 will send an operation instruction to the operating system and / or mechanism to control the cargo compartment to descend from the current position to the initial position, while keeping the cargo compartment in a horizontal state. At the same time, the vehicle controller 1 will continue to transmit the status information of the dump truck corresponding to the vehicle obtained by the sensor to it for uninterrupted monitoring.

[0053] Control the cargo compartment to descend from the current position to the initial position. In this embodiment, the vehicle controller 1 will output a driving signal to control the cargo compartment's descending solenoid valve 2, and connect the vehicle's air source 4 through the air pipe three-way valve 5 and the descending channel of the three-position three-way valve 6, thereby controlling the return oil interface and the lifting cylinder interface to be connected, and the high-pressure oil returns to the oil tank, and the cylinder oil pressure decreases, so that the cargo compartment descends to the initial position, while keeping the cargo compartment in a horizontal state.

[0054] In some embodiments, the vehicle controller 1 also controls the pressure relief flow of the power take-off by limiting the output current, thereby controlling the descent speed of the cargo compartment.

[0055] In some embodiments, when it is determined that the cargo compartment of the vehicle is in a non-horizontal state, the vehicle controller 1 will restrict the vehicle, that is, the vehicle controller 1 will obtain part of the vehicle control authority from the driver at this time, and the vehicle controller 1 will restrict the vehicle to a low-power state. In this embodiment, the low-power state is that the vehicle operates at 50% of the rated power to reduce the probability of an accident. It is undeniable that limiting the rated power of the vehicle is not the only limiting method, and limiting methods also include but are not limited to locking the brakes, disengaging the clutch, etc.

[0056] In some embodiments, after determining that the cargo compartment of the vehicle is in a non-horizontal state, the vehicle controller 1 is used to output corresponding prompt information (fault level and fault status description) to the driver through the CAN network, thereby achieving timely prompts and notifications to relevant personnel when a problem occurs in the dump truck, which is conducive to improving the relevant personnel's intuitive perception of the status of the dump truck.

[0057] In this embodiment, the notification method can be the dump truck driver's vehicle terminal (dashboard) and / or mobile terminal, or the dump truck manager's terminal. The terminal can be an electronic device such as a computer, mobile phone, tablet computer or personal digital assistant. The corresponding prompt information can be collected by customizing or installing the corresponding application in the preset terminal. Of course, the corresponding prompt information can also be collected by browsing a specified web page.

[0058] Embodiment 2

[0059] The control method for lowering the cargo compartment of a dump truck provided by the present invention can be applied to a dump truck system, such as a dump truck control system. Figure 3 As shown, the method for controlling the descent of the dump truck cargo compartment provided in this embodiment may include the following steps.

[0060] In the first step, the vehicle controller 1 obtains the vehicle status information.

[0061] In this embodiment, the vehicle controller 1 obtains the vehicle status information through sensors. The preset sensors may be one or more sensors installed on the dump truck. The sensors may include angle sensors, gravity sensors, pressure sensors, displacement sensors, photoelectric sensors, position positioning modules such as GPS sensors, and speed sensors.

[0062] In this embodiment, the vehicle status information may include the status of the power take-off of the dump truck, the position status of the cargo compartment, the distance traveled from neutral gear to forward gear, the current vehicle speed and the current gear position, etc.

[0063] Corresponding to each of the above sensors, the status information of the corresponding vehicle of the dump truck obtained by the preset sensors is transmitted to the vehicle controller 1.

[0064] In the second step, the vehicle controller 1 determines the current state of the vehicle through the acquired state information, wherein the state information of the vehicle is associated with the pre-set information.

[0065] In this embodiment, the vehicle controller 1 can be a pre-set service system or a temporarily set server or device, which is mainly used to analyze, store and output the data provided by the sensor. In specific applications, the vehicle controller 1 can be provided by a dump truck operator, manager or third-party operator.

[0066] The state can be determined by directly comparing the state information with the numerical value of the characteristic data and / or establishing a preset analysis model. The preset analysis model can be a calculation model and / or a comparison model stored in the vehicle controller 1. In this embodiment, the characteristic data is data that characterizes the dump truck and / or its related mechanisms in a special state, which is reflected as a characteristic event of the dump truck and / or its related mechanisms. Therefore, each characteristic data and the corresponding characteristic event are pre-established with an associated relationship before the vehicle state information is analyzed using the preset analysis model.

[0067] If the current state of the vehicle is a stable state, the vehicle controller 1 does not control the vehicle, and then returns to the step of the vehicle controller 1 obtaining the state information of the vehicle.

[0068] In this step, the state information of the vehicle corresponding to the dump truck obtained by the sensor is transmitted to the vehicle controller 1, and then the vehicle controller 1 uses the preset analysis model to analyze the parameters in the vehicle state information to find the characteristic data corresponding to the parameters, and compares it with the value of the characteristic data to determine the type of event. Here, the vehicle controller 1 analyzes the received vehicle state information and determines that the current state of the vehicle is a stable state. In this embodiment, the stable state should be understood as the cargo compartment of the vehicle being in a horizontal state, that is, the cargo compartment is lowered to the initial position, rather than in an arbitrary lifting state. In this case, the vehicle controller 1 will not issue an operating instruction to the operating system and / or mechanism for the cargo compartment. At the same time, the vehicle controller 1 will continue to transmit the state information of the vehicle corresponding to the dump truck obtained by the sensor to it for uninterrupted monitoring. Until a special event and / or state is triggered.

[0069] If the current state of the vehicle is an unstable state, the vehicle is converted from the unstable state to a stable state, and then the process returns to the step of the vehicle controller 1 acquiring the state information of the vehicle.

[0070] In this step, the state information of the dump truck corresponding to the vehicle obtained by the sensor is transmitted to the vehicle controller 1, and then the vehicle controller 1 uses the preset analysis model to analyze the parameters in the vehicle state information to find the characteristic data corresponding to the parameters, and compares it with the value of the characteristic data to determine the type of event. Here, the vehicle controller 1 analyzes the received vehicle state information and determines that the current state of the vehicle is an unstable state. In this embodiment, the unstable state should be understood as: the power take-off switch is in the disconnected state, the cargo compartment is not in the horizontal position, the vehicle switches from the neutral gear to the forward gear and the driving distance is greater than 50 meters, the vehicle speed is greater than 20km / h, and the current gear is the forward gear. When the above five conditions are met at the same time, a special event and / or state is triggered, that is, the vehicle controller 1 determines that the cargo compartment of the vehicle is in a non-horizontal state, that is, the cargo compartment is not in the initial position, but in an arbitrary lifting state. At this time, if the vehicle continues to move forward in this state, when encountering a height-restricted section, the car compartment will hit the height-restricted building, causing a traffic accident. In this case, the vehicle controller 1 will send an operation instruction to the operating system and / or mechanism to control the cargo compartment to descend from the current position to the initial position, while keeping the cargo compartment in a horizontal state. At the same time, the vehicle controller 1 will continue to transmit the status information of the dump truck corresponding to the vehicle obtained by the sensor to it for uninterrupted monitoring.

[0071] Control the cargo compartment to descend from the current position to the initial position. In the present embodiment, the cargo compartment is manually lowered to its original position. Specifically, the vehicle air source 4 is connected to the descending channel of the three-way valve 6 through the air pipe three-way valve 5 by the manually controlled three-position six-way valve 3, so that the return oil interface and the lifting cylinder interface are connected, the high-pressure oil returns to the oil tank, and the cylinder oil pressure decreases, so that the cargo compartment descends to the initial position while keeping the cargo compartment in a horizontal state.

[0072] In some embodiments, the vehicle controller 1 also controls the pressure relief flow of the power take-off by limiting the output current, thereby controlling the descent speed of the cargo compartment.

[0073] In some embodiments, when it is determined that the cargo compartment of the vehicle is in a non-horizontal state, the vehicle controller 1 will restrict the vehicle, that is, the vehicle controller 1 will obtain part of the vehicle control authority from the driver at this time, and the vehicle controller 1 will restrict the vehicle to a low-power state. In this embodiment, the low-power state is that the vehicle operates at 50% of the rated power to reduce the probability of an accident. It is undeniable that limiting the rated power of the vehicle is not the only limiting method, and limiting methods also include but are not limited to locking the brakes, disengaging the clutch, etc.

[0074] In some embodiments, after determining that the cargo compartment of the vehicle is in a non-horizontal state, the vehicle controller 1 is used to output corresponding prompt information (fault level and fault status description) to the driver through the CAN network, thereby achieving timely prompts and notifications to relevant personnel when a problem occurs in the dump truck, which is conducive to improving the relevant personnel's intuitive perception of the status of the dump truck.

[0075] In this embodiment, the notification method can be the dump truck driver's vehicle terminal (dashboard) and / or mobile terminal, or the dump truck manager's terminal. The terminal can be an electronic device such as a computer, mobile phone, tablet computer or personal digital assistant. The corresponding prompt information can be collected by customizing or installing the corresponding application in the preset terminal. Of course, the corresponding prompt information can also be collected by browsing a specified web page.

[0076] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for controlling the descent of a dump truck cargo compartment, characterized in that: A control system for lowering a cargo compartment of a dump truck, the control system for lowering a cargo compartment of a dump truck comprising: A vehicle controller (1) is used to receive vehicle status information, perform logical judgment, and output a drive signal according to the judgment result; A descending solenoid valve (2), the descending solenoid valve (2) receiving the driving signal and controlling the output of the control gas of the vehicle air source (4); a gas pipe three-way valve (5), the automatic control interface of the gas pipe three-way valve (5) being connected to the output port of the vehicle gas source (4) for receiving the gas output from the descending solenoid valve (2); and A three-position three-way valve (6), wherein the descending channel of the three-position three-way valve (6) is connected to the gas output port of the gas pipe three-way valve (5), and the oil return interface of the three-position three-way valve (6) is connected to the interface of the lifting cylinder; A manually controlled three-position six-way valve (3), wherein the air inlet of the manually controlled three-position six-way valve (3) is connected to the output port of the vehicle air source (4), and the air outlet of the manually controlled three-position six-way valve (3) is connected to the manual control interface of the air pipe three-way valve (5); The steps include: The vehicle controller (1) obtains the vehicle status information; The vehicle controller (1) determines the current state of the vehicle by acquiring the state information; If the current state of the vehicle is a stable state, the vehicle controller (1) does not control the vehicle, and then returns to the step of the vehicle controller (1) acquiring the state information of the vehicle; and If the current state of the vehicle is an unstable state, the vehicle is converted from the unstable state to a stable state, and then the vehicle controller (1) is returned to the step of obtaining the state information of the vehicle; If the current state of the vehicle is an unstable state, the vehicle controller (1) limits the vehicle to a low-power state and at the same time the vehicle controller (1) inputs the vehicle air source (4) into the air pipe three-way valve (5) via the descending solenoid valve (2), and then connects to the descending channel of the three-position three-way valve (6), so as to convert the vehicle from an unstable state to a stable state, and then returns to the step of the vehicle controller (1) obtaining the vehicle state information; or If the current state of the vehicle is an unstable state, the vehicle controller (1) limits the vehicle to a low-power state and the three-position six-way valve (3) is manually controlled to connect the vehicle air source (4) to the descending channel of the three-position three-way valve (6), so as to convert the vehicle from an unstable state to a stable state. After that, the vehicle controller (1) releases the low-power state of the vehicle and then returns to the step of the vehicle controller (1) obtaining the vehicle state information. The unstable state satisfies the following conditions at the same time: the power take-off switch is disconnected, the cargo compartment is not in a horizontal position, the vehicle travels a distance of more than 50 meters from neutral to forward gear, the vehicle speed is greater than 20 km / h, and the current gear is in forward gear; Among them, the stable state is that the cargo compartment is in a horizontal position.

2. The method for controlling the lowering of a dump truck cargo compartment according to claim 1, characterized in that: The low power state is when the vehicle operates at 50% of rated power.

3. The method for controlling the lowering of a dump truck cargo compartment according to claim 1, characterized in that: The vehicle controller (1) drives the vehicle fault status description to be sent to the instrument panel via the CAN network for display to the driver.

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