Agricultural work vehicle and method for controlling engine speed thereof

Abstract

Provided is a method for controlling an engine speed of an agricultural work vehicle, the method comprising the steps of: receiving a user input for activating a rear control mode to control the engine speed of the agricultural work vehicle from a rear of the agricultural work vehicle; determining whether an operating condition of the rear control mode is satisfied; and, on the basis of a determination that the operating condition of the rear control mode is satisfied, controlling the engine speed to a target engine speed inputted through an engine speed manipulation unit located rearward of a seat of the agricultural work vehicle.

Description

Agricultural work vehicle and method for controlling the engine speed thereof

[0001] The present disclosure relates to an agricultural work vehicle and a method for controlling the engine speed thereof.

[0002] Agricultural work vehicles are vehicles used for agricultural work, such as rice transplanters, combines, and tractors. For example, a tractor can perform necessary agricultural work while attached with various implements required for agricultural work.

[0003] Rear implements, such as backhoes, can be attached to the rear of agricultural work vehicles to perform tasks. During operation, the rear implement receives the necessary power from the engine of the agricultural work vehicle. For example, the power required to raise or lower the backhoe's boom is generated by the engine of the agricultural work vehicle and supplied to the hydraulic system via the PTO (Power Take-Off). At this time, the power required varies depending on the different movements of the backhoe, and the engine speed must be controlled to regulate the power supplied from the engine.

[0004] However, since the controller for controlling engine speed (e.g., toggle switch or joystick) is located at the front of the agricultural work vehicle, the operator must sit in the rear to use the rear implement, move forward to operate the controller to control the engine speed, and then return to the rear. A solution is needed to address the inconvenience and inefficiency that may arise when using rear implements in this manner.

[0005] The present disclosure is intended to provide an agricultural work vehicle capable of controlling engine speed while a worker is seated in the rear to use a rear implement.

[0006] According to one aspect of the present disclosure, a method for controlling the engine speed of an agricultural work vehicle may include receiving a user input that activates a rear control mode for controlling the engine speed of the agricultural work vehicle from the rear of the agricultural work vehicle; determining whether the operating conditions of the rear control mode are satisfied; and, based on the determination that the operating conditions of the rear control mode are satisfied, controlling the engine speed to a target engine speed input through an engine speed control unit located behind the seat of the agricultural work vehicle.

[0007] In one embodiment, the step of determining whether the operating conditions of the rear control mode are satisfied may determine that the operating conditions of the rear control mode are not satisfied when the parking brake is not engaged.

[0008] In one embodiment, when the rear control mode is activated, the rear control mode can be deactivated when the parking brake is released.

[0009] In one embodiment, the step of determining whether the operating conditions of the rear control mode are satisfied may determine that the operating conditions of the rear control mode are not satisfied when the engine speed exceeds the idle speed.

[0010] In one embodiment, the step of determining whether the operating conditions of the rear control mode are satisfied may determine that the operating conditions of the rear control mode are not satisfied when the operator is in a driving position, and the driving position may be a state in which the operator is sitting in the seat facing the front of the agricultural work vehicle.

[0011] In one embodiment, the method may further include the step of deactivating the rear control mode when the operator is located at the driving position while the rear control mode is activated.

[0012] In one embodiment, the state in which the worker has left the driving position may include the state in which the worker is sitting in the seat facing the rear of the agricultural work vehicle.

[0013] In one embodiment, the step of determining whether the operating conditions of the rear control mode are satisfied may determine that the operating conditions of the rear control mode are not satisfied when the driving neutral state is not present.

[0014] In one embodiment, the method may further include the step of deactivating the rear control mode if the driving neutral state is not maintained while the rear control mode is activated.

[0015] In one embodiment, the driving neutral state may include at least one of the cases where the HST pedal is in a neutral state, where the clutch is disengaged, and where the forward / reverse gearbox is in a neutral state.

[0016] In one embodiment, the step of controlling the engine speed comprises: determining whether the engine speed control unit is located at a first position corresponding to the idle speed of the engine; and, based on the determination that the engine speed control unit is not located at the first position, controlling the engine speed to the target engine speed when the engine speed control unit is moved to the first position and then moved to a second position corresponding to the target engine speed.

[0017] According to one aspect of the present disclosure, an agricultural work vehicle comprises a rear control selection switch that receives a user input activating a rear control mode for controlling the engine speed of the agricultural work vehicle from the rear of the agricultural work vehicle, an engine speed control unit located behind the seat of the agricultural work vehicle and receiving a target engine speed input, and a processing module that receives a signal from the rear control selection switch and the engine speed control unit, wherein the processing module determines whether the operating conditions of the rear control mode are satisfied and, based on the determination that the operating conditions of the rear control mode are satisfied, can control the engine speed to the target engine speed.

[0018] In one embodiment, the processing module may determine that the operating conditions of the rear control mode are not satisfied when the parking brake is not engaged.

[0019] In one embodiment, the processing module may determine that the operating conditions of the rear control mode are not satisfied when the engine speed exceeds the idle speed.

[0020] In one embodiment, the processing module may determine that the operating conditions of the rear control mode are not satisfied when the operator is in the driving position, and the driving position may be a state in which the operator is sitting in the seat facing the front of the agricultural work vehicle.

[0021] In one embodiment, the processing module may determine that the operating conditions of the rear control mode are not satisfied when the driving neutral state is not present.

[0022] An agricultural work vehicle according to one embodiment can resolve the inconvenience and inefficiency that may occur when using a rear implement by allowing the operator to control the engine speed while sitting in the rear.

[0023] FIG. 1 schematically illustrates a state in which a rear implement is attached to an agricultural work vehicle according to one embodiment.

[0024] FIG. 2 is a block diagram showing the components of a system for controlling the engine speed of an agricultural work vehicle according to one embodiment.

[0025] FIG. 3 is a flowchart illustrating a method for controlling the engine speed of an agricultural work vehicle according to one embodiment.

[0026] FIG. 4 is a flowchart illustrating an example of a method for determining whether the operating conditions of a rear control mode are satisfied according to one embodiment.

[0027] FIG. 5 is a flowchart illustrating an example of a method for determining whether the operating conditions of a rear control mode are satisfied according to one embodiment.

[0028] FIG. 6 is a flowchart illustrating an example of a method for determining whether the operating conditions of a rear control mode are satisfied according to one embodiment.

[0029] FIG. 7 is a flowchart illustrating an example of a method for determining whether the operating conditions of a rear control mode are satisfied according to one embodiment.

[0030] The terms used in this disclosure have been selected to be as widely used and general as possible, taking into account their functions within this disclosure; however, these terms may vary depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. In specific cases, terms have been selected at the applicant's discretion, and in such cases, their meanings will be described in detail in the relevant explanatory sections. Therefore, terms used in this disclosure should be defined not merely by their names, but based on their meanings and the overall content of this disclosure.

[0031] Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art as described in this specification.

[0032] In this disclosure, the term “and / or” includes a combination of a plurality of related described components or any of a plurality of related described components.

[0033] Terms including ordinal numbers, such as "first" or "second," used in this disclosure may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another.

[0034] In the present 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.

[0035] When a part of a specification is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, terms such as "part" or "module" as used in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware or software, or as a combination of hardware and software.

[0036] Hereinafter, embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present disclosure in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals. In addition, the reference numerals used in each drawing are for the purpose of explaining each drawing, and different reference numerals used in different drawings are not intended to represent different elements.

[0037] FIG. 1 schematically illustrates a state in which a rear implement is attached to an agricultural work vehicle according to one embodiment.

[0038] Referring to FIG. 1, a rear implement (110) is attached to the rear of an agricultural work vehicle (100). The rear implement (110) is equipment attached to the rear of the agricultural work vehicle (100) and used for work, and can be operated by power supplied from the engine of the agricultural work vehicle (100). For example, the rear implement (110) may be a backhoe, but is not limited thereto.

[0039] An agricultural work vehicle (100) may include a rear control panel (120) for controlling a rear implement (110). The rear control panel (120) may include various controllers depending on the type of rear implement (110). In an example where the rear implement (110) is a backhoe, the rear control panel (120) may include a PTO switch for turning the PTO (Power Take-Off) ON or OFF, and a hydraulic lever for controlling the boom, etc. The rear control panel (120) may be located behind the seat (130) so that the operator can work while looking at the rear implement (110).

[0040] The agricultural work vehicle (100) may include a seat (130) on which a user sits. When the agricultural work vehicle (100) is moving or a front implement is used, the worker may sit facing forward, and when a rear implement is used, the worker may sit facing backward. Accordingly, the seat (130) may be composed of a front seat and a rear seat, or may be composed of a single seat that can be oriented forward and backward.

[0041] The agricultural work vehicle (100) may include a front control panel (140) for controlling the movement of the agricultural work vehicle (100). For example, the front control panel (140) may include, but is not limited to, a steering wheel for controlling the rotation of the agricultural work vehicle (100), a gear selector lever for selecting a gear, a switch for selecting forward, neutral, or reverse of a forward / reverse transmission unit (e.g., a shuttle), a throttle lever for controlling engine speed, a Hydrostatic Transmission (HST) pedal for controlling the speed of the agricultural work vehicle (100), or a joystick for controlling a front implement. The front control panel (140) may be positioned in front of the seat (130) so that the operator can work while looking forward.

[0042] FIG. 2 is a block diagram showing the components of a system for controlling the engine speed of an agricultural work vehicle according to one embodiment.

[0043] Referring to FIG. 2, the system (200) may include a rear control selection switch (210), an engine speed control unit (220), an interface module (230), an engine speed sensor (240), a driving position detection sensor (250), a parking brake detection sensor (260), a driving neutral state detection sensor (270), and a processing module (280).

[0044] The rear control selection switch (210) can receive user input to activate a rear control mode for controlling the engine speed at the rear of the agricultural work vehicle (100). The rear control selection switch (210) may be located on the rear control panel (120) or the front control panel (140).

[0045] As an example, the rear control selection switch (210) may be a toggle switch located on the rear control panel (120), and the user may select ON of the toggle switch to activate the rear control mode and select OFF of the toggle switch to deactivate the rear control mode. As another example, the rear control selection switch (210) may be a push button switch located on the front control panel (140), and the user may press the push button switch to activate the rear control mode and press the push button switch again to deactivate the rear control mode. However, the type of the rear control selection switch (210) is not limited thereto.

[0046] The engine speed control unit (220) can receive a target engine speed. The engine speed control unit (220) can be located on the rear control panel (120).

[0047] As an example, the engine speed control unit (220) may be a lever located on the rear control panel (120) and adjustable within a predetermined range including a first position corresponding to the idle speed of the engine. In this case, the user may push the lever forward to increase the target engine speed and pull the lever backward to decrease the target engine speed. As another example, the engine speed control unit (220) may be a push button switch located on the rear control panel (120) and including a plus (+) button and a minus (-) button. In this case, the user may press the plus (+) button to increase the target engine speed and press the minus (-) button to decrease the target engine speed. However, the type of engine speed control unit (220) is not limited thereto.

[0048] The engine speed control unit (220) may be a controller for controlling the rear implement (110). For example, if the rear implement (110) is a backhoe, the rear control panel (120) may include one or more joysticks or levers for controlling the boom, deeper-stick, and bucket. Among the one or more joysticks or levers, the joystick or lever controlling the boom, which requires the greatest power during operation, may be used as the engine speed control unit (220). The engine speed may increase based on the user operating the joystick or lever to raise the boom, and the engine speed may decrease based on the user operating the joystick or lever to lower the boom. In this example, the system (200) may control the engine speed at the rear of the agricultural work vehicle (100) without having a separate controller for setting the engine speed.

[0049] The interface module (230) can convert the analog output signals of the rear control selection switch (210) and the engine speed control unit (220) into digital signals and transmit the converted digital signals to the processing module (280). For example, the digital signals may be CAN (Controller Area Network) signals, but are not limited thereto.

[0050] The interface module (230) may be located between the rear control panel (120) and the front control panel (140) (e.g., under the seat (130)) and may be connected to the rear control selection switch (210), the engine speed control unit (220), and the processing module (280) via a wiring harness, but is not limited thereto.

[0051] The engine speed sensor (240) can detect the engine speed. For example, the engine speed sensor (240) may be any one of a magnetic pickup sensor, a Hall effect sensor, and a variable reluctance sensor, but is not limited thereto.

[0052] The driving position detection sensor (250) can detect whether the worker has left the driving position. The driving position may refer to the state in which the worker is sitting on the seat (130) facing the front of the agricultural work vehicle (100). In an example where the seat (130) consists of a front seat and a rear seat, the driving position detection sensor (250) may be a weight sensor located on the front seat, and if the measured weight is less than a predetermined standard, it can detect that the worker has left the driving position. In an example where the seat (130) consists of a single seat that can be turned forward and backward, the driving position detection sensor (250) may be a rotation detection sensor, and if the direction of the seat is backward, it can detect that the worker has left the driving position. However, the type of the driving position detection sensor (250) is not limited thereto.

[0053] In one embodiment, the state in which the worker has left the driving position may include the state in which the worker is sitting on the seat (130) facing the rear of the agricultural work vehicle (100) to operate the rear implement (110). In this example, the driving position detection sensor (250) may be a weight sensor located on the rear seat, and can detect that the worker has left the driving position if the measured weight is greater than or equal to a predetermined standard.

[0054] The parking brake detection sensor (260) can detect whether the parking brake is engaged. For example, the parking brake detection sensor (260) may be any one of a position sensor that detects the position of the parking brake lever or a Hall effect sensor that detects the position of the parking brake lever using a magnetic field, but is not limited thereto.

[0055] A driving neutral state detection sensor (270) can detect whether the agricultural work vehicle (100) is in a driving neutral state. A driving neutral state may refer to a state in which the engine's power is not transmitted to the wheels. For example, a driving neutral state may include at least one of the following: when the HST pedal is in a neutral state, when the clutch is disengaged, and when the forward / reverse gearbox is in a neutral state. The driving neutral state detection sensor (270) may include, but is not limited to, at least one of a position sensor that detects the position of the HST pedal, a position sensor that detects the position of the clutch pedal, a pressure sensor that detects a change in hydraulic pressure of the hydraulic clutch, and a position sensor that detects the position of the power shuttle lever.

[0056] The processing module (280) can control the engine speed to a target engine speed. The operation of the processing module (280) controlling the engine speed is described later with reference to FIG. 3.

[0057] The processing module (280) may include a processor (281) and memory (282).

[0058] The processor (281) can control the overall operations of the system (200). For example, the processor (281) can control the operations performed by the system (200) to control engine speed by executing one or more instructions or programs stored in memory (282).

[0059] The processor (281) may be composed of at least one of, for example, a CPU (Central Processing Unit), a microprocessor, an AP (Application Processor), a GPU (Graphic Processing Unit), an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an ECU (Electronic Control Unit), a TCU (Transmission Control Unit), and a VCU (Vehicle Control Unit), but is not limited thereto.

[0060] The memory (282) may store one or more instructions or programs that can be executed by the processor (281). The operations of the system (200) described in this disclosure may be implemented by the processor (281) executing the instructions or programs stored in the memory (282).

[0061] The memory (282) may include at least one of flash memory, hard disk, RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), and PROM (Programmable Read-Only Memory), but is not limited thereto.

[0062] FIG. 3 is a flowchart for explaining a method for controlling the engine speed of an agricultural work vehicle according to one embodiment, and FIG. 4 to 7 are flowcharts for explaining examples of a method for determining whether the operating conditions of a rear control mode are satisfied according to one embodiment.

[0063] Referring to FIG. 3, in operation 301, the system (200) may receive user input to activate a rear control mode for controlling the engine speed of the agricultural work vehicle (100) at the rear of the agricultural work vehicle (100). Operation 301 may be performed via a rear control selection switch (210).

[0064] In operation 302, the system (200) can determine whether the operating conditions of the rear control mode are satisfied. Operation 302 can be understood as a procedure for checking safety conditions to activate the rear control mode.

[0065] The system (200) may determine whether the operating conditions of the rear control mode are satisfied based on at least one of whether the parking brake is engaged, whether the operator has left the driving position, whether the agricultural work vehicle (100) is in a driving neutral state, and whether the engine speed is below the idle speed, but is not limited thereto.

[0066] As an example, as illustrated in FIG. 4, the system (200) may determine that the operating conditions of the rear control mode are satisfied when the parking brake is engaged and the operator has left the driving position. The system (200) may determine whether the operator has left the driving position through the driving position detection sensor (250).

[0067] In the example of FIG. 4, the system (200) can determine that the operating conditions of the rear control mode are not met when the parking brake is not engaged.

[0068] In the example of FIG. 4, the system (200) may determine that the operating conditions of the rear control mode are not met when the operator is in the driving position.

[0069] As another example, as illustrated in FIG. 5, the system (200) can determine that the operating conditions of the rear control mode are satisfied when the parking brake is engaged, the operator is out of the driving position, and the agricultural work vehicle (100) is in a driving neutral state.

[0070] A driving neutral state may refer to a state in which the engine's power is not transmitted to the wheels. For example, if the HST pedal is in a neutral state, the clutch is disengaged, or the forward / reverse gearbox is in a neutral state, the system (200) may determine that the agricultural work vehicle (100) is in a driving neutral state.

[0071] In the example of FIG. 5, the system (200) can determine that the operating conditions of the rear control mode are not met when the parking brake is not engaged.

[0072] In the example of FIG. 5, the system (200) may determine that the operating conditions of the rear control mode are not met when the operator is in the driving position.

[0073] In the example of FIG. 5, the system (200) can determine that the operating conditions of the rear control mode are not met when the agricultural work vehicle (100) is not in a driving neutral state.

[0074] As another example, as illustrated in FIG. 6, the system (200) may determine that the operating conditions of the rear control mode are satisfied when the parking brake is engaged, the operator is out of the driving position, and the engine speed is below the idle speed. The idle speed may be 1000 rpm, but is not limited thereto.

[0075] In the example of FIG. 6, the system (200) can determine that the operating conditions of the rear control mode are not met when the parking brake is not engaged.

[0076] In the example of FIG. 6, the system (200) may determine that the operating conditions of the rear control mode are not met when the operator is in the driving position.

[0077] In the example of FIG. 6, the system (200) can determine that the operating conditions of the rear control mode are not met when the engine speed exceeds the idle speed.

[0078] As another example, as illustrated in FIG. 7, the system (200) can determine that the operating conditions of the rear control mode are satisfied when the parking brake is engaged, the operator is out of the driving position, the engine speed is below the idle speed, and the agricultural work vehicle (100) is in a driving neutral state.

[0079] In the example of FIG. 7, the system (200) can determine that the operating conditions of the rear control mode are not met when the parking brake is not engaged.

[0080] In the example of FIG. 7, the system (200) may determine that the operating conditions of the rear control mode are not met when the operator is in the driving position.

[0081] In the example of FIG. 7, the system (200) can determine that the operating conditions of the rear control mode are not met when the engine speed exceeds the idle speed.

[0082] In the example of FIG. 7, the system (200) can determine that the operating conditions of the rear control mode are not met when the agricultural work vehicle (100) is not in a driving neutral state.

[0083] In one embodiment, operation 302 can be performed continuously even while the rear control mode is activated. For example, while the system (200) is controlling the engine speed to a target engine speed in operation 303, the system (200) can continuously monitor whether the operating conditions of the rear control mode are satisfied. At this time, if it is determined that the operating conditions of the rear control mode are not satisfied, the system (200) can disable the rear control mode.

[0084] For example, when the rear control mode is activated, the system (200) can deactivate the rear control mode if the parking brake is released, the operator is in the driving position, or the driving neutral state is not maintained.

[0085] When the rear control mode is deactivated, the rear control selection switch (210) and the engine speed control unit (220) can be returned to an initial state by operation of the system (200) or an operator.

[0086] Referring again to FIG. 3, in operation 303, the system (200) can activate the rear control mode based on the determination that the operating conditions of the rear control mode are satisfied. In the rear control mode, the system (220) can control the engine speed to the target engine speed input through the engine speed control unit (220).

[0087] In an example where the engine speed control unit (220) is a lever adjustable within a predetermined range including a first position corresponding to the idle speed of the engine, the system (200) may or may not control the engine speed to a target engine speed depending on the position of the lever at the time of receiving user input to activate the rear control mode, even though the operating condition of the rear control mode in operation 302 is satisfied.

[0088] For example, the system (200) can determine whether the lever is in a first position. The system (200) can control the engine speed to the target engine speed if the lever is in the first position and then the user operates the lever to move the lever to a second position corresponding to the target engine speed. If the lever is not in the first position, the system (200) can control the engine speed to the target engine speed if the user operates the lever to move the lever to the first position and then to the second position.

[0089] If the target engine speed is set to a value other than the idle speed at the time the rear control mode is activated, the rear implement may operate differently from the user's intention, potentially causing a safety accident. A system (200) according to one embodiment can prevent safety accidents caused by unexpected operation of the implement in advance by determining whether to control the engine speed based on the position of the lever at the time of receiving user input.

[0090] In an example where the engine speed control unit (220) is a controller for controlling a rear implement (110) attached to the rear of an agricultural work vehicle (100), if the rear implement (100) is a backhoe, the engine speed control unit (220) may be a joystick or lever for controlling the boom of the backhoe.

[0091] The embodiments of the present disclosure described above may be implemented in the form of a recording medium comprising computer-executable instructions, such as program modules executed by a computer. A computer-readable medium may include any volatile and non-volatile media, and removable and inseparable media, that can be accessed by a computer. Additionally, a computer-readable medium may include computer storage media and communication media. A computer storage medium may include volatile and non-volatile, removable and inseparable media implemented by any method or technique for storing information, such as computer-readable instructions, data structures, program modules, or other data. A communication medium may include other data of modulated data signals, such as computer-readable instructions, data structures, or program modules.

[0092] The foregoing description of the present disclosure is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present disclosure. Therefore, all of the above descriptions should be understood as illustrative and not limiting. For example, a component described in a single form may be implemented in a distributed manner, and components described in a distributed manner may likewise be implemented in a combined manner.

[0093] The scope of the present disclosure is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalents thereof should be interpreted as being included within the scope of the present disclosure.

Claims

1. A step of receiving user input to activate a rear control mode for controlling the engine speed of an agricultural work vehicle (100) from the rear of the agricultural work vehicle (100); A step of determining whether the operating conditions of the above rear control mode are satisfied; A method for controlling the engine speed of an agricultural work vehicle, comprising the step of controlling the engine speed to a target engine speed input through an engine speed control unit (220) located behind the seat (130) of the agricultural work vehicle (100), based on the determination that the operating conditions of the rear control mode are satisfied.

2. In Paragraph 1, The step of determining whether the operating conditions of the above rear control mode are satisfied is: An engine speed control method for an agricultural work vehicle that determines that the operating conditions of the rear control mode are not satisfied when the parking brake is not engaged.

3. In Paragraph 2, A method for controlling engine speed of an agricultural work vehicle, wherein the rear control mode is deactivated when the parking brake is released while the rear control mode is activated.

4. In Paragraph 1, The step of determining whether the operating conditions of the above rear control mode are satisfied is: An engine speed control method for an agricultural work vehicle, which determines that the operating conditions of the rear control mode are not satisfied when the above engine speed exceeds the idle speed.

5. In Paragraph 1, The step of determining whether the operating conditions of the above rear control mode are satisfied is: It is determined that the operating conditions of the above rear control mode are not satisfied when the operator is in the driving position, and A method for controlling the engine speed of an agricultural work vehicle, wherein the above driving position is a state in which the worker is sitting in the seat facing the front of the agricultural work vehicle (100).

6. In Paragraph 5, A method for controlling the engine speed of an agricultural work vehicle, further comprising the step of deactivating the rear control mode when the operator is in the driving position while the rear control mode is activated.

7. In Paragraph 5, A method for controlling the engine speed of an agricultural work vehicle, wherein the state in which the worker has departed from the driving position includes the state in which the worker is sitting in the seat (130) facing the rear of the agricultural work vehicle (100).

8. In Paragraph 1, The step of determining whether the operating conditions of the above rear control mode are satisfied is: An engine speed control method for an agricultural work vehicle that determines that the operating conditions of the rear control mode are not satisfied when the vehicle is not in a driving neutral state.

9. In Paragraph 8, A method for controlling engine speed of an agricultural work vehicle, wherein if the driving neutral state is not maintained while the rear control mode is activated, the rear control mode is deactivated.

10. In Paragraph 8, A method for controlling engine speed of an agricultural work vehicle, wherein the above driving neutral state includes at least one of the cases where the HST pedal is in a neutral state, where the clutch is disengaged, and where the forward / reverse gearbox is in a neutral state.

11. In Paragraph 1, The step of controlling the engine speed above is, A step of determining whether the engine speed control unit (220) is located at a first position corresponding to the idle speed (idle) of the engine, and A method for controlling the engine speed of an agricultural work vehicle, comprising the step of controlling the engine speed to the target engine speed when the engine speed control unit (220) is moved to the first position and then moved to a second position corresponding to the target engine speed, based on a determination that the engine speed control unit (220) is not located at the first position.

12. A rear control selection switch (210) that receives user input to activate a rear control mode for controlling the engine speed of the agricultural work vehicle (100) from the rear of the agricultural work vehicle (100); An engine speed control unit (220) located behind the seat (130) of the above agricultural work vehicle (100) and receiving a target engine speed input; and It includes a processing module (280) that receives signals from the rear control selection switch (210) and the engine speed control unit (220), and The above processing module (280) is, An agricultural work vehicle that determines whether the operating conditions of the rear control mode are satisfied, and controls the engine speed to the target engine speed based on the determination that the operating conditions of the rear control mode are satisfied.

13. In Paragraph 12, The above processing module (280) is, An agricultural work vehicle that determines that the operating conditions of the rear control mode are not met when the parking brake is not engaged.

14. In Paragraph 12, The above processing module (280) is, An agricultural work vehicle that determines that the operating conditions of the rear control mode are not met when the above engine speed exceeds the idle speed.

15. In Paragraph 12, The above processing module (280) is, It is determined that when the operator is in the driving position, the operating conditions of the above rear control mode are not satisfied, and The above driving position is an agricultural work vehicle in which the worker is sitting in the seat facing the front of the agricultural work vehicle (100).

16. In Paragraph 12, The above processing module (280) is, An agricultural work vehicle that determines that the operating conditions of the above rear control mode are not met when the vehicle is not in a neutral driving state.

Images