Agricultural work vehicle

Abstract

A method for generating a pressure profile for an agricultural work vehicle is provided. The method comprises the steps of: receiving an operation mode input for selecting an operation mode of the agricultural work vehicle; generating a basic pressure profile when the selected operation mode is a basic mode; generating a work pressure profile when the selected operation mode is a work mode; and controlling a hydraulic clutch of the agricultural work vehicle on the basis of the generated pressure profile.

Description

agricultural work vehicles

[0001] The present disclosure relates to a method for reducing shift shock in an agricultural work vehicle.

[0002] Agricultural work vehicles are vehicles used for agricultural work, such as rice transplanters, combine harvesters, and tractors. For example, tractors can perform necessary agricultural work by moving with various agricultural work tools attached.

[0003] Power generated by the power generator (e.g., engine, electric motor, etc.) of an agricultural work vehicle is transmitted to the wheels via a hydraulic clutch and transmission. For example, a hydraulic clutch transmits or disengages power to the transmission by hydraulically engaging or disengaging a flywheel attached to the engine crankshaft and multiple clutch discs connected to the transmission. Because the power generators in agricultural work vehicles generate significantly greater torque than engines used in automobiles, the moment a hydraulic clutch engages or disengages can cause significant shock.

[0004] Methods for adjusting the engagement and disengagement speeds of hydraulic clutches have been attempted to mitigate shift shock in agricultural work vehicles. However, these methods adjust the engagement and disengagement speeds of the hydraulic clutch based on the vehicle's idle state (e.g., without any implements attached). Therefore, they are not suitable for the operating environments of agricultural work vehicles, which experience varying load conditions (e.g., with implements attached, working on flat ground, working on slopes, etc.).

[0005] The present disclosure provides a method for generating a pressure profile considering the load conditions of an agricultural work vehicle.

[0006] According to one aspect of the present disclosure, a method for generating a pressure profile in an agricultural work vehicle may include the steps of: receiving an operation mode input for selecting an operation mode of the agricultural work vehicle; generating a basic pressure profile when the selected operation mode is a basic mode, and generating a work pressure profile when the selected operation mode is a work mode; and controlling a hydraulic clutch of the agricultural work vehicle based on the generated pressure profile, wherein a pressure of a fill phase of the basic pressure profile may be a second pressure (P2), and a pressure of a fill phase of the work pressure profile may be a third pressure (P3) greater than the second pressure (P2).

[0007] In one embodiment, the method for generating a pressure profile of the agricultural work vehicle may further include a step of receiving a shift response level input for selecting a shift response level of the agricultural work vehicle, and the step of generating the work pressure profile may include a step of determining the third pressure (P3) based on the selected shift response level.

[0008] In one embodiment, the step of determining the third pressure (P3) may determine the third pressure to a larger value as the selected shift response level corresponds to a faster shift speed.

[0009] In one embodiment, the step of generating the working pressure profile may further include the step of generating a pressure of a speed phase of the working pressure profile based on the selected shift response level.

[0010] In one embodiment, the working pressure profile may include a soft landing phase, wherein the pressure of the soft landing phase may be reduced from any pressure between the first pressure (P1) and the third pressure (P3) that is less than the second pressure (P2) to the first pressure (P1).

[0011] In one embodiment, the method for generating a pressure profile of the agricultural work vehicle may further include a step of receiving a shift response level input for selecting a shift response level of the agricultural work vehicle, and the step of generating the work pressure profile may include a step of generating a pressure of the soft landing phase such that the pressure of the soft landing phase linearly decreases at a predetermined slope, wherein the predetermined slope may be generated based on the selected shift response level.

[0012] According to one aspect of the present disclosure, an agricultural work vehicle may include an operation mode switch that receives an operation mode input for selecting an operation mode of the agricultural work vehicle, a controller that generates a basic pressure profile when the selected operation mode is a basic mode and generates an operation pressure profile when the selected operation mode is a work mode, and a hydraulic system that generates hydraulic pressure for controlling a hydraulic clutch based on the generated pressure profile, wherein the controller may generate a pressure of a fill phase of the basic pressure profile as a second pressure (P2) and a pressure of a fill phase of the work pressure profile as a third pressure (P3) greater than the second pressure (P2).

[0013] In one embodiment, the agricultural work vehicle may further include a shift response level switch that receives a shift response level input that selects a shift response level of the agricultural work vehicle, and the controller may determine the third pressure (P3) based on the selected shift response level.

[0014] In one embodiment, the working pressure profile may include a soft landing phase, and the controller may generate the pressure of the soft landing phase such that the pressure of the soft landing phase is reduced from any pressure between the first pressure (P1) and the third pressure (P3) that is less than the second pressure (P2) to the first pressure (P1).

[0015] In one embodiment, the agricultural work vehicle may further include a shift response level switch that receives a shift response level input that selects a shift response level of the agricultural work vehicle, and the controller may generate a pressure of the soft landing phase such that the pressure of the soft landing phase linearly decreases at a predetermined slope, the predetermined slope being generated based on the selected shift response level.

[0016] An agricultural work vehicle according to one embodiment can generate a hydraulic profile for engaging or disengaging a hydraulic clutch, taking into account load conditions.

[0017] An agricultural work vehicle according to one embodiment can adjust the engagement force of a hydraulic clutch in consideration of load conditions.

[0018] An agricultural work vehicle according to one embodiment can mitigate shift shock under high load conditions.

[0019] FIG. 1 is a block diagram illustrating components of an agricultural work vehicle according to one embodiment.

[0020] Figure 2 is a drawing for explaining a method of operating a shuttle lever according to one embodiment.

[0021] FIG. 3 is a flowchart illustrating an operation for generating a pressure profile according to one embodiment.

[0022] Figure 4 is a graph illustrating a basic pressure profile according to one embodiment.

[0023] Figures 5a and 5b are graphs illustrating a working pressure profile according to one embodiment.

[0024] The terms used in this disclosure are selected from widely used, common terms, taking into account the functions of the disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. In certain cases, terms may be arbitrarily selected by the applicant, in which case their meanings will be described in detail in the relevant description. Therefore, the terms used in this disclosure should not be defined simply as names, but rather based on the meanings of the terms and the overall content of the disclosure.

[0025] Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art described herein.

[0026] The term "and / or" in this disclosure includes any combination of a plurality of related described components or any one of a plurality of related described components.

[0027] Terms including ordinal numbers, such as "first" or "second," used in this disclosure may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another.

[0028] In this disclosure, the expression “at least one of a, b, or c” may refer to “a,” “b,” “c,” “a and b,” “a and c,” “b and c,” “all of a, b, and c,” or variations thereof.

[0029] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part" and "module" used in the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0030] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts that are not related to the description are omitted to clearly explain the present disclosure, and similar parts are designated with similar reference numerals throughout the specification. In addition, the reference numerals used in each drawing are only for the purpose of describing each drawing, and different reference numerals used in different drawings do not indicate different elements.

[0031] FIG. 1 is a block diagram illustrating components of an agricultural work vehicle according to one embodiment.

[0032] Referring to FIG. 1, an agricultural work vehicle (100) may include a power generator (110), a hydraulic clutch (120), a transmission (130), a hydraulic system (140), a controller (150), a shuttle lever (160), a shift response level switch (170), and an operation mode switch (180). However, not all of the components illustrated in FIG. 1 are essential components. The agricultural work vehicle (100) may be implemented with more components than the components illustrated in FIG. 1, or may be implemented with fewer components. For example, the agricultural work vehicle (100) may further include a sensor for measuring the weight of a work tool attached to the agricultural work vehicle (100) (e.g., a load cell, a pressure sensor, a piezoelectric sensor, etc.), and / or a sensor for measuring the inclination of the agricultural work vehicle (100) (e.g., an accelerometer, a gyroscope, an inclinometer, a magnetometer, etc.).

[0033] The power generator (110) can generate power required for driving and operating the agricultural work vehicle (100). For example, the power generator (110) can be, but is not limited to, an engine or an electric motor.

[0034] The hydraulic clutch (120) can transmit or block power generated by the power generator (110) to the transmission (130) by being hydraulically engaged or disengaged. For example, the hydraulic clutch (120) can include multiple clutch disks. When the hydraulic clutch (120) is engaged, power can be transmitted to the transmission (130), and when the hydraulic clutch (120) is disengaged, power to the transmission (130) can be blocked. The hydraulic clutch (120) can be disengaged and then engaged before and after the transmission (130) shifts.

[0035] The engagement and disengagement speed of the hydraulic clutch (120) may vary depending on the rate of change of the hydraulic pressure supplied from the hydraulic system (140). For example, if the rate of change of the hydraulic pressure is rapid, the engagement and disengagement speed of the hydraulic clutch (120) may increase, and if the rate of change of the hydraulic pressure is slow, the engagement and disengagement speed of the hydraulic clutch (120) may decrease. If the engagement and disengagement speed of the hydraulic clutch (120) is high, a relatively strong shift shock may occur, and if the engagement and disengagement speed of the hydraulic clutch (120) is low, a relatively weak shift shock may occur.

[0036] The engagement force of the hydraulic clutch (120) may vary depending on the magnitude of the hydraulic pressure supplied from the hydraulic system (140). For example, when the hydraulic pressure is large, the hydraulic clutch (120) may be relatively strongly engaged, and when the hydraulic pressure is small, the hydraulic clutch (120) may be relatively weakly engaged. If the engagement force of the hydraulic clutch (120) is excessively large compared to the load conditions (e.g., whether a work tool is attached, the weight of the attached work tool, whether the work is on a flat surface or on a slope, etc.), a shift shock may occur and the power transmission system (e.g., the hydraulic clutch (120), the transmission (130), the drive shaft, the differential gear, etc.) may be damaged. If the engagement force of the hydraulic clutch (120) is excessively small compared to the load conditions, clutch slip may occur, resulting in a loss of power and damage to the hydraulic clutch (120) due to friction.

[0037] Therefore, the hydraulic pressure needs to be controlled so that the hydraulic clutch (120) is engaged at a strength and / or speed appropriate for the load conditions of the agricultural work vehicle (100). As described below, the user can control the hydraulic pressure that engages the hydraulic clutch (120) according to desired conditions (e.g., load conditions, type of work, etc.). For example, the user can control the hydraulic pressure generated by the hydraulic system (140) by selecting a shift response level through the shift response level switch (170).

[0038] The transmission (130) can convert the power transmitted through the hydraulic clutch (120) into a speed and torque set according to a gear ratio and transmit it to the wheels. The transmission (130) can be controlled by hydraulic pressure supplied from the hydraulic system (140). The transmission (130) can include a shuttle shift that changes the driving direction (e.g., forward or backward) of the agricultural work vehicle (100), a main transmission that converts the speed and torque of the agricultural work vehicle (100) in stages, and a sub transmission that assists the main transmission to finely adjust the speed and torque. For example, if the main transmission is an 8-speed transmission and the sub transmission is a 3-speed transmission, the transmission (130) can convert the transmitted power into a speed and torque of 48 stages, including 24 stages in the forward direction and 24 stages in the reverse direction.

[0039] As illustrated in FIG. 2, the shuttle transmission can change the driving direction of the agricultural work vehicle (100) based on the user's manipulation of the shuttle lever (160). The shuttle lever (160) can be manipulated in the forward and backward directions, but is not limited thereto. For example, when the user pushes the shuttle lever (160) forward to position it in the forward position (F), the shuttle transmission can change the driving direction of the agricultural work vehicle (100) to forward, and when the user pulls the shuttle lever (160) backward to position it in the reverse position (R), the shuttle transmission can change the driving direction of the agricultural work vehicle (100) to reverse. When the user positions the shuttle lever (160) in the neutral position (N), the shuttle transmission can be in a neutral state.

[0040] However, the shape of the shuttle lever (160) is not limited to the shape illustrated in FIG. 2, and for example, the shuttle lever (160) may be implemented to include a plurality of buttons (e.g., a forward button, a neutral button, a reverse button, etc.).

[0041] The transmission may be shifted based on the user's manipulation of a transmission lever (not shown) or shift buttons (e.g., a plus (+) button and a minus (-) button). For example, the transmission may be a power shift transmission that shifts using hydraulic pressure supplied from a hydraulic system (140), but is not limited thereto.

[0042] The auxiliary transmission can be shifted based on the user's manipulation of the auxiliary transmission lever (not shown).

[0043] The hydraulic system (140) can generate hydraulic pressure for engaging or disengaging the hydraulic clutch (120) based on a control signal from the controller (150). The hydraulic system (140) can generate hydraulic pressure for controlling the transmission (130) based on a control signal from the controller (150). The hydraulic system (140) can include, but is not limited to, a hydraulic pump that applies pressure to hydraulic oil, a hydraulic control valve that regulates the flow of hydraulic oil, a hydraulic oil tank that stores hydraulic oil, and a hydraulic filter that filters out impurities that may be included in the hydraulic oil.

[0044] The controller (150) can generate a pressure profile based on the operating mode selected by the user. The pressure profile can represent the hydraulic pressure that the hydraulic system (140) must generate over time to engage or disengage the hydraulic clutch (120) during shifting. The operation of the controller (150) to generate the pressure profile is described below with reference to FIGS. 3 to 5B.

[0045] The controller (150) can generate a control signal corresponding to the pressure profile and transmit it to the hydraulic system (140). The hydraulic system (140) can generate a hydraulic pressure corresponding to the pressure profile based on the control signal of the controller (150).

[0046] The controller (150) may include a memory (not shown) that stores one or more commands or programs, and a processor (not shown) that causes the controller (150) to perform an operation of generating a pressure profile and transmitting the pressure profile to the hydraulic system (140) by executing the one or more commands or programs.

[0047] For example, the memory may include, but is not limited to, at least one of flash memory, a hard disk, random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and programmable read-only memory (PROM).

[0048] For example, the processor may be configured as, but is not limited to, at least one of a CPU (Central Processing Unit), a microprocessor, an AP (Application Processor), a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), and an ECU (Electronic Control Unit).

[0049] The shift response level switch (170) can receive a shift response level input for selecting a shift response level of the agricultural work vehicle (100) from the user. The shift response level is to adjust the shift shock felt by the user when shifting by adjusting the engagement speed of the hydraulic clutch (120) through hydraulic pressure. For example, if the hydraulic pressure is increased to increase the engagement speed of the hydraulic clutch (120), the shift shock felt by the user when shifting can be increased, and if the hydraulic pressure is decreased to decrease the engagement speed of the hydraulic clutch (120), the shift shock felt by the user when shifting can be reduced. As described below, the hydraulic pressure can be adjusted by the hydraulic system (140).

[0050] The shift response level may correspond to the engagement and disengagement speed of the hydraulic clutch (120). For example, the shift response level may be one of levels 1 to 5. In the above example, level 1 may correspond to the fastest speed, and level 5 may correspond to the slowest speed. For example, the shift response level switch (170) may include a plus (+) switch and a minus (-) switch, and the default shift response level may be level 3. In this example, the user may select level 1 by pressing the plus (+) switch twice, and level 5 by pressing the minus (-) switch twice. However, the number of shift response levels and the shape of the shift response level switch (170) are not limited thereto. For example, the shift response level may be one of six or more levels, and the shift response level switch (170) may be implemented as a rotary switch that can select the shift response level by turning the switch.

[0051] The operation mode switch (180) can receive an operation mode input from a user to select an operation mode. The operation mode can include a basic mode and a work mode. The basic mode can correspond to a case where the agricultural work vehicle (100) is in an unoccupied state or is driving on a general road other than a work area. The work mode can correspond to a state where a work tool is attached to the agricultural work vehicle (100). In the present disclosure, the basic mode can be referred to as a "normal mode" or a "driving mode."

[0052] For example, a user can select a basic mode by inputting a shift response level through a shift response level switch (170) without pressing the operation mode switch (180), and can select a working mode by inputting a shift response level through a shift response level switch (170) while pressing the operation mode switch (180).

[0053] The operation mode switch (180) may be a switch already installed in the agricultural work vehicle (100) to perform a function other than a switch dedicated to selecting an operation mode. For example, the operation mode switch (180) may be a "CAL / SEL" switch for adjusting the size of tires of the agricultural work vehicle (100). According to one embodiment, the agricultural work vehicle (100) may utilize an existing switch for selecting an operation mode without adding a new switch.

[0054] FIG. 3 is a flowchart illustrating an operation for generating a pressure profile according to one embodiment.

[0055] The operations of FIG. 3 may be performed by the agricultural work vehicle (100) when the processor included in the controller (150) executes one or more commands or programs stored in the memory. Below, operations for engaging the hydraulic clutch (120) are described, but the present disclosure is not limited thereto and may be similarly applied to operations for disengaging the hydraulic clutch (120).

[0056] In operation 310, the agricultural work vehicle (100) can receive an operation mode input for selecting an operation mode of the agricultural work vehicle (100). The agricultural work vehicle (100) can receive the operation mode input through an operation mode switch (180).

[0057] In operation 320, the agricultural work vehicle (100) can receive a shift response level input for selecting a shift response level of the agricultural work vehicle (100). The agricultural work vehicle (100) can receive the shift response level input through a shift response level switch (170).

[0058] For example, the user can select the basic mode by inputting the shift response level through the shift response level switch (170) without pressing the operation mode switch (180), and can select the working mode by inputting the shift response level through the shift response level switch (170) while pressing the operation mode switch (180).

[0059] In operation 330, the agricultural work vehicle (100) can check the selected operation mode.

[0060] In operation 340, the agricultural work vehicle (100) may generate a basic pressure profile when the operation mode is the basic mode. The basic mode may correspond to a case where the agricultural work vehicle (100) is in an empty state or is driving on a general road other than a work area.

[0061] Referring to FIG. 4, the basic pressure profile may include a Fill Phase, a Torque Phase, and a Speed ​​Phase.

[0062] The fill phase may correspond to the process in which the hydraulic oil required to engage the hydraulic clutch (120) is filled inside the hydraulic system.

[0063] In the fill phase, hydraulic pressure can be generated as a second pressure (P2). In the fill phase, a relatively higher hydraulic pressure is required than in other phases because the hydraulic clutch (120) begins to move to engage.

[0064] The torque phase may correspond to the process in which the hydraulic clutch (120) is engaged by hydraulic pressure and the power generated by the power generator (110) begins to be transmitted to the transmission (130).

[0065] In the torque phase, hydraulic pressure can be generated at a first pressure (P1). The first pressure (P1) may be less than the second pressure (P2). During the power transmission process, an appropriate engagement force is required to prevent damage to the power transmission system while minimizing power loss. By generating the first pressure (P1) to be less than the second pressure (P2), the engagement force of the hydraulic clutch (120) can be finely adjusted.

[0066] The speed phase may correspond to a process in which the hydraulic clutch (120) is maintained so that power can be continuously transmitted without being separated by external force while the agricultural work vehicle (100) performs agricultural work.

[0067] In the speed phase, the hydraulic pressure can be set based on the gear shift response level. In an example where the gear shift response level is one of levels 1 to 5, the hydraulic pressure can be set to increase at a first slope when the gear shift response level is level 1, and the hydraulic pressure can be set to increase at a second slope when the gear shift response level is level 5. In this case, the first slope can be set to be greater than the second slope. In the above example, when the gear shift response level is one of levels 2 to 4, the hydraulic pressure can increase at a slope less than the first slope and greater than the second slope.

[0068] Referring again to FIG. 3, at operation 350, the agricultural work vehicle (100) may generate a work pressure profile when the operating mode is a work mode. The work mode may correspond to a state in which a work device is attached to the agricultural work vehicle (100).

[0069] Referring to Fig. 5a, the working pressure profile may include a Fill Phase, a Soft Landing Phase, a Torque Phase, and a Speed ​​Phase. Since the hydraulic pressure settings in the Torque Phase and the Speed ​​Phase are the same as in the basic pressure profile, only the hydraulic pressure settings in the Fill Phase and the Soft Landing Phase will be described herein.

[0070] The fill phase and soft landing phase may correspond to the process in which the hydraulic oil required to engage the hydraulic clutch (120) is filled inside the hydraulic system.

[0071] In the fill phase, the hydraulic pressure may be set to a third pressure (P3). The third pressure (P3) may be greater than the second pressure (P2). The third pressure (P3) may be determined based on the load conditions of the agricultural work vehicle (100). For example, the third pressure (P3) may be determined to be greater as the weight of the work equipment attached to the agricultural work vehicle (100) increases.

[0072] In an example where the agricultural work vehicle (100) does not include a sensor for measuring the weight of the implement, the third pressure (P3) may be determined based on a shift response level selected by the user. The user may select a shift response level corresponding to a slow speed (e.g., level 4 or level 5) to alleviate shift shock when the implement is heavier. Conversely, the user may select a shift response level corresponding to a fast speed (e.g., level 1 or level 2) when the implement is lighter. Accordingly, the agricultural work vehicle (100) may set the third pressure (P3) to a relatively high level when receiving a user input for selecting a level corresponding to a slow speed, and may set the third pressure (P3) to a relatively low level when receiving a user input for selecting a level corresponding to a fast speed.

[0073] In an example where the agricultural work vehicle (100) includes a sensor that measures the weight of the work tool, the third pressure (P3) can be determined based on the weight of the work tool measured by the sensor.

[0074] In the soft landing phase, the hydraulic pressure may be set to decrease from any pressure between the first pressure (P1) and the third pressure (P3) that is lower than the second pressure (P2) to the first pressure (P1). At this time, the hydraulic pressure may be set to decrease linearly at a predetermined slope. The predetermined slope may be determined based on the load conditions of the agricultural work vehicle (100). For example, the predetermined slope may be determined to be more gentle (i.e., have a smaller absolute value) as the weight of the work equipment attached to the agricultural work vehicle (100) becomes heavier.

[0075] In an example where the agricultural work vehicle (100) does not include a sensor for measuring the weight of the implement, the predetermined incline may be determined based on a shift response level selected by the user. The agricultural work vehicle (100) may set the predetermined incline to be relatively gentle (i.e., with a small absolute value) when receiving a user input selecting a level corresponding to a slow speed, and may set the predetermined incline to be relatively steep (i.e., with a large absolute value) when receiving a user input selecting a level corresponding to a fast speed.

[0076] In an example where the agricultural work vehicle (100) includes a sensor that measures the weight of the work tool, a predetermined incline can be determined based on the weight of the work tool measured by the sensor.

[0077] For example, as in 510 of FIG. 5a, if the determined slope is steeper than the slope decreasing from the second pressure (P2) at time t1 to the first pressure (P1) at time t3, the pressure of the soft landing phase can linearly decrease from a certain pressure between the second pressure (P2) and the third pressure (P3) at time t1 to the first pressure (P1) at time t3.

[0078] For example, as in 520 of FIG. 5a, if the determined slope is steeper than the slope decreasing from the second pressure (P2) at time t1 to the first pressure (P1) at time t3, the pressure of the soft landing phase can linearly decrease from a specific pressure between the first pressure (P1) and the second pressure (P2) at time t1 to the first pressure (P1) at time t2. In this case, the point in time at which the soft landing phase ends can be brought forward from t3 to t2.

[0079] For example, as in 530 of FIG. 5b, if the determined slope is gentler than the slope decreasing from the second pressure (P2) at time t1 to the first pressure (P1) at time t3, the pressure of the soft landing phase can linearly decrease from a specific pressure between the first pressure (P1) and the second pressure (P2) at time t1 to the first pressure (P1) at time t3, as in 530.

[0080] Since the difference between the third pressure (P3) and the first pressure (P1) is relatively greater than the difference between the second pressure (P2) and the first pressure (P1), if the hydraulic pressure changes abruptly from the third pressure (P3) to the first pressure (P1), the hydraulic clutch (120) may be momentarily separated, resulting in a power cut. In one embodiment, the agricultural work vehicle (100) can resolve the problem of power cut due to a sudden pressure difference by setting the hydraulic pressure to decrease linearly in the soft landing phase.

[0081] Referring again to FIG. 3, at operation 360, the agricultural work vehicle (100) can control the hydraulic clutch (120) based on the generated pressure profile. For example, the controller (150) can generate a control signal corresponding to the pressure profile and transmit it to the hydraulic system (140). The hydraulic system (140) can generate a hydraulic pressure corresponding to the pressure profile based on the control signal of the controller (150). The hydraulic clutch (120) can be engaged or disengaged depending on the hydraulic pressure of the hydraulic system (140).

[0082] In one embodiment, when a work mode is selected, the agricultural work vehicle (100) may activate one or more other functions associated with the work mode. For example, the agricultural work vehicle (100) may activate an EZ brake function. The EZ brake function may refer to a function that allows the user to stop the agricultural work vehicle (100) simply by depressing the brake pedal without having to place the shuttle lever (160) in a neutral position or depress the inching pedal to disengage the hydraulic clutch (120). For example, even if the EZ brake function is designed to be activated only after receiving a separate activation command, the agricultural work vehicle (100) according to one embodiment may automatically activate the EZ brake function when the work mode is selected to help the user perform the work more conveniently.

[0083] The embodiments of the present disclosure described above may be implemented in the form of a recording medium containing computer-executable instructions, such as program modules, executed by a computer. Computer-readable media may include any volatile and nonvolatile media, removable and non-removable media that can be accessed by a computer. Furthermore, computer-readable media may include computer storage media and communication media. Computer storage media may include volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Communication media may include computer-readable instructions, data structures, or other data in a modulated data signal, such as program modules.

[0084] The above description of the present disclosure is provided for illustrative purposes only, and those skilled in the art will readily appreciate that the present disclosure can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present disclosure. Therefore, the above descriptions should be understood as illustrative and not limiting. For example, components described in a single form may be implemented in a distributed manner, and similarly, components described in a distributed manner may be implemented in a combined manner.

[0085] The scope of the present disclosure is indicated by the claims set forth below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present disclosure.

Claims

1. A method for generating a pressure profile in an agricultural work vehicle, A step of receiving an operation mode input for selecting an operation mode of the agricultural work vehicle; If the selected operation mode is a basic mode, a step of generating a basic pressure profile, and if the selected operation mode is a work mode, a step of generating a work pressure profile; and A step of controlling a hydraulic clutch of the agricultural work vehicle based on the generated pressure profile, The pressure of the fill phase of the above basic pressure profile is the second pressure (P2), A method for generating a pressure profile of an agricultural work vehicle, wherein the pressure of the fill phase of the above-mentioned working pressure profile is a third pressure (P3) greater than the second pressure (P2).

2. In paragraph 1, The method for generating a pressure profile of the above agricultural work vehicle is as follows: Further comprising a step of receiving a shift response level input for selecting a shift response level of the agricultural work vehicle; The steps of generating the above working pressure profile are: A method for generating a pressure profile of an agricultural work vehicle, comprising the step of determining the third pressure (P3) based on the selected gear response level.

3. In paragraph 2, The step of determining the third pressure (P3) is: A method for generating a pressure profile of an agricultural work vehicle, wherein the third pressure is determined to have a larger value as the selected gear response level corresponds to a faster gear speed.

4. In paragraph 2, The steps of generating the above working pressure profile are: A method for generating a pressure profile of an agricultural work vehicle, further comprising the step of generating a pressure of a speed phase of the working pressure profile based on the selected shift response level.

5. In paragraph 1, The above working pressure profile includes a soft landing phase, A method for generating a pressure profile of an agricultural work vehicle, wherein the pressure of the soft landing phase is reduced from any pressure between the first pressure (P1) and the third pressure (P3) which is less than the second pressure (P2) to the first pressure (P1).

6. In paragraph 5, The method for generating a pressure profile of the above agricultural work vehicle is as follows: Further comprising a step of receiving a shift response level input for selecting a shift response level of the agricultural work vehicle; The steps of generating the above working pressure profile are: A step of generating the pressure of the soft landing phase so that the pressure of the soft landing phase is linearly reduced at a predetermined slope, A method for generating a pressure profile of an agricultural work vehicle, wherein the predetermined slope is generated based on the selected gear response level.

7. An operation mode switch (180) for receiving an operation mode input for selecting an operation mode of an agricultural work vehicle (100); A controller (150) that generates a basic pressure profile when the selected operation mode is a basic mode, and generates a working pressure profile when the selected operation mode is a working mode; and A hydraulic system (140) for generating hydraulic pressure for controlling a hydraulic clutch based on the generated pressure profile is included. The above controller (150) The pressure of the fill phase of the above basic pressure profile is generated as the second pressure (P2), An agricultural work vehicle, which generates the pressure of the fill phase of the above work pressure profile as a third pressure (P3) greater than the second pressure (P2).

8. In paragraph 7, The above agricultural work vehicle (100) is, Further comprising a shift response level switch (170) for receiving a shift response level input for selecting a shift response level of the agricultural work vehicle; The above controller (150) An agricultural work vehicle, wherein the third pressure (P3) is determined based on the selected gear response level.

9. In paragraph 7, The above working pressure profile includes a soft landing phase, The above controller (150) An agricultural work vehicle, wherein the pressure of the soft landing phase is generated such that the pressure of the soft landing phase is reduced from any pressure between the first pressure (P1) and the third pressure (P3) that is less than the second pressure (P2) to the first pressure (P1).

10. In paragraph 9, The above agricultural work vehicle (100) is, Further comprising a shift response level switch (170) for receiving a shift response level input for selecting a shift response level of the agricultural work vehicle; The above controller (150) The pressure of the soft landing phase is generated so that the pressure of the soft landing phase decreases linearly at a predetermined slope, An agricultural work vehicle, wherein the above-described predetermined slope is generated based on the above-described selected gear response level.

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