KR102581369B1 - Method for controlling clutch using load estimation in automated transmission - Google Patents

Abstract

The present invention relates to a method of controlling the clutch by estimating the load in an automatic transmission. More specifically, the load applied to the agricultural vehicle is estimated by considering the change in clutch transmission rate according to the change in the load applied to the agricultural vehicle. It relates to a clutch control method using load estimation in an automatic transmission that can suppress the occurrence of shift shock due to changes in load and prevent deterioration of shift quality by controlling the clutch in consideration of the estimated load.
In the present invention, in a method of controlling the clutch 110 in consideration of the workload added to the agricultural vehicle 1, the control unit 130 determines whether the clutch pedal 200 is in a pressed state. Status determination step (S100); A workload clutch transmission rate information collection step (S200) of collecting information on the clutch transmission rate (=workload clutch transmission rate) of the clutch 110 in the workload state; A workload calculation step (S300) of calculating the workload by comparing the workload clutch transfer rate information with predetermined reference load clutch transfer rate information; and a clutch control step (S400) of controlling the operation of the clutch 110 in consideration of the calculated workload.

Description

Clutch control method using load estimation in automated transmission {Method for controlling clutch using load estimation in automated transmission}

The present invention relates to a method of controlling the clutch by estimating the load in an automatic transmission. More specifically, the load applied to the agricultural vehicle is estimated by considering the change in clutch transmission rate according to the change in the load applied to the agricultural vehicle. It relates to a clutch control method using load estimation in an automatic transmission that can suppress the occurrence of shift shock due to changes in load and prevent deterioration of shift quality by controlling the clutch in consideration of the estimated load.

Typically, as can be seen in FIG. 1, an agricultural vehicle (1) such as a tractor is equipped with a transmission (5) that changes gear engagement according to the forward, reverse, or driving speed in order to transmit the output of the engine (2) to the driving wheels. ) is provided.

Conventionally, agricultural vehicles (1) such as tractors mainly used manual transmissions with simple structures and excellent fuel efficiency, but the manual transmissions had the disadvantage of being difficult for the driver to operate and causing shocks during shifting.

In response to this, attempts are being made to prevent the occurrence of shift shock and improve shift performance while providing excellent fuel efficiency and convenient operation for the driver by installing an automated shift device in the manual transmission. The transmission (5) is automated. It is called a transmission.

More specifically, in the automatic transmission, the hydraulic clutch is not engaged or disengaged according to the driver's direct operation, but the controller controls the clutch valve to adjust the flow rate applied to the hydraulic clutch and operates the hydraulic clutch. By controlling the engaging and disengaging operations, the vehicle moves forward, backwards, or shifts gears.

However, in the automatic transmission according to the prior art, the load added to the agricultural vehicle (1) may vary depending on the type of work tool attached to the agricultural vehicle (1) such as a tractor or the condition of the farmland, etc., and accordingly, the standard If a light load that is lower than the load is applied, the clutch may engage quickly, causing shift shock, and if a heavy load is applied, the slow response of the clutch may cause the driver to feel uncomfortable, leading to a problem of deteriorating shifting quality. It may appear.

In contrast, conventionally, a shift response level switch was installed in the driver's seat so that the driver could directly set the shift response level according to load conditions. However, in this case, the driver judged the load conditions according to the work situation and used the shift response level switch at any time. Not only does it have to be manipulated, but there is also the problem that it is difficult to properly set the correct shift response level according to various load conditions.

Furthermore, it is also possible to consider a method of controlling the clutch by sensing the working environment, such as the type of work machine attached to the agricultural work vehicle (1) and the condition of the farmland, and then calculating the load conditions added to the agricultural work vehicle (1). However, in this case, it is undesirable because separate sensors and electrical circuits must be added, which may lead to an increase in product cost.

Accordingly, in an automated transmission that suppresses the occurrence of shift shock and prevents deterioration of shift quality by detecting changes in the load applied to the agricultural vehicle (1) and controlling the clutch in consideration of this without adding additional parts, Although demands for clutch control methods continue, an appropriate solution has not yet been proposed.

Republic of Korea Patent Publication No. 10-2008-0097550

The present invention was developed to solve the above problems, and detects changes in the load applied to the agricultural vehicle (1) without adding additional parts and controls the clutch in consideration of this, thereby suppressing the occurrence of shift shock, etc. The purpose is to provide a clutch control method in an automated transmission that can prevent deterioration in transmission quality.

Other detailed purposes of the present invention will be clearly understood and understood by experts or researchers in this technical field through the detailed contents described below.

The method of controlling the clutch 110 in the automated transmission 100 according to an embodiment of the present invention to solve the above problem controls the clutch 110 in consideration of the workload added to the agricultural vehicle 1. The method includes a clutch pedal state determination step (S100) in which the control unit 130 determines whether the clutch pedal 200 is in a pressed state; A workload clutch transmission rate information collection step (S200) of collecting information on the clutch transmission rate (=workload clutch transmission rate) of the clutch 110 in the workload state; A workload calculation step (S300) of calculating the workload by comparing the workload clutch transfer rate information with predetermined reference load clutch transfer rate information; and a clutch control step (S400) of controlling the operation of the clutch 110 in consideration of the calculated workload.

At this time, in the clutch pedal state determination step (S100), the control unit 130 uses the position information of the clutch pedal 200 received from the clutch pedal sensor 210 to move the clutch pedal 200 within a predetermined range. If it is located in , it can be judged to be in a press state.

In addition, in the workload calculation step (S300), one or more of the response time (=workload response time) and slope (=workload slope) of the clutch transmission rate for the clutch 110 in the workload state is used. Thus, the workload can be calculated.

Here, the workload response time may be the time taken from the end of fill-up control for the clutch 110 to the time when the workload clutch transfer rate increases to a predetermined response time measurement standard value.

In addition, the workload slope is the time (Δt) required for the workload clutch transfer rate in the clutch 110 to increase from the predetermined first slope measurement standard value to the second slope measurement standard value and the workload clutch transmission rate during that time. It may be the ratio (ΔP/Δt) of the increase (ΔP).

Furthermore, in the workload calculation step (S300), when the control unit 130 calculates the workload, based on a predetermined standard load, a predetermined response is provided based on the difference between the workload response time and the standard load response time. The workload can be calculated by adding or subtracting one or more of a value multiplied by a time correction ratio or a value obtained by multiplying the difference between the workload slope and the reference load slope by a predetermined slope correction ratio.

In addition, in the workload clutch transfer rate information collection step (S200), the control unit 100 controls the engine control unit (ECU) for the engine 2 or the transmission 5 of the agricultural vehicle 1. The workload clutch transfer rate information can be collected using information generated by the unit (TCU).

Additionally, in the clutch control step (S400), the operation of the clutch 110 can be controlled by adjusting the hydraulic profile of the clutch 110 according to the calculated workload.

In the clutch 110 control method using load estimation in the automatic transmission 100 according to an embodiment of the present invention, the change in clutch transmission rate according to the change in the load applied to the agricultural vehicle 1 is taken into consideration. By estimating the workload added to the work vehicle 1 and controlling the clutch 110 in consideration of the estimated workload, the occurrence of shift shock due to changes in load is suppressed and the deterioration of shift quality is effectively prevented. It can be prevented.

Figure 1 is an exemplary diagram of a typical agricultural work vehicle (1).
Figure 2 is a flowchart of a method for controlling the clutch 110 using load estimation in the automated transmission 100 according to an embodiment of the present invention.
Figure 3 is a configuration diagram of a clutch 110 control system using load estimation in the automated transmission 100 according to an embodiment of the present invention.
Figure 4 is a diagram for explaining control of the clutch 110 in the automatic transmission 100 according to an embodiment of the present invention.
Figures 5 and 6 are diagrams for explaining in detail a method of controlling the clutch 110 using load estimation in the automated transmission 100 according to an embodiment of the present invention.
Figure 7 is a flowchart according to an additional embodiment of a method for controlling the clutch 110 using load estimation in the automated transmission 100 according to an embodiment of the present invention.
Figures 8a and 8b are diagrams for explaining a method of controlling the clutch 110 using load estimation in the automated transmission 100 according to another embodiment of the present invention.
FIG. 9 is a diagram illustrating a method of controlling the clutch 110 using an estimated workload in the automatic transmission 100 according to an embodiment of the present invention.

The present invention can be modified in various ways and can have various embodiments. Hereinafter, specific embodiments will be described in detail based on the accompanying drawings.

In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Terms such as first, second, etc. may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another component. It is used.

Hereinafter, exemplary embodiments of a method for controlling the clutch 110 using load estimation in the automated transmission 100 according to the present invention will be described in detail with reference to the attached drawings.

First, Figure 2 illustrates a flowchart of a method for controlling the clutch 110 using load estimation in the automated transmission 100 according to an embodiment of the present invention. As can be seen in FIG. 2, the method of controlling the clutch 110 using load estimation in the automated transmission 100 according to the present invention includes a clutch pedal state determination step (S100) and a workload clutch transfer rate information collection step (S200). ), a workload calculation step (S300), and a clutch control step (S400).

First, in the clutch pedal state determination step (S100), the control unit 130 determines whether the clutch pedal 200 is in a pressed state.

More specifically, in the clutch pedal state determination step (S100), the control unit 130 uses the position information of the clutch pedal 200 received from the clutch pedal sensor 210 to determine whether the clutch pedal 200 is If it is located within a certain range, it can be judged to be in a press state.

Next, in the workload clutch transfer rate information collection step (S200), the control unit 130 collects information on the clutch transfer rate (=workload clutch transfer rate) of the clutch 110 in the workload state.

Subsequently, in the workload calculation step (S300), the workload being added to the agricultural vehicle 1 is calculated by comparing the workload clutch transfer rate information with predetermined standard load clutch transfer rate information.

Finally, in the clutch control step (S400), the operation of the clutch 110 is controlled in consideration of the calculated workload.

More specifically, the control unit 130 controls the operation of the clutch 110 by adjusting the hydraulic profile (e.g., driving pressure, slope, etc. in the hydraulic profile) of the clutch 110 according to the calculated workload. can be controlled.

In addition, Figure 3 shows a configuration diagram of a clutch 110 control system using load estimation in the automated transmission 100 according to an embodiment of the present invention.

Below, a method and system for controlling the clutch 110 using load estimation in the automated transmission 100 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 and 3.

First, as can be seen in FIG. 3, the clutch 110 control system using load estimation in the automated transmission 100 according to an embodiment of the present invention includes a clutch 110, a clutch valve 120, and the clutch. It may include a control unit 130 for controlling the clutch 110, and also controls the engagement and disengagement of the clutch pedal 200 and the position of the clutch pedal 200. It may be configured to include a clutch pedal sensor 210 that senses information.

At this time, as can be seen in FIG. 4, the clutch 110 is provided with a single or a plurality of plates 112 and disks 113, and the plate 112 and the disk 113 It performs the function of connecting and blocking power through connection and disconnection.

To this end, the clutch valve 120, which is composed of a solenoid valve, etc., supplies oil supplied from a hydraulic pump to the clutch 110 to drive the piston 111, thereby driving the plate 112 and the disk. Concatenation and decomposition of (113) are performed.

However, in the automated transmission 100, the engaging and disengaging operations of the clutch 110 are not performed according to the driver's direct manipulation, but the clutch valve 120 is controlled by the control unit 130 to engage the clutch 110. The engaging and disengaging operations of the clutch 110 are controlled while controlling the flow rate flowing into the clutch 110. More specifically, the control unit 130 controls the clutch valve 120 to supply hydraulic pressure to the clutch 110 ((A) in Figure 4), and accordingly, the piston 111 is driven (Figure 4 (B)), power is transmitted while the plate 112 and the disk 113 are in contact with each other.

However, in the conventional automatic transmission 100, as can be seen in FIG. 5, the operation of the clutch 110 is controlled using a hydraulic profile ((A) in FIG. 5) according to a predetermined load condition. Accordingly, when a light load lower than the standard load ((b) in Figure 5) is applied (Figure 5(a)), the clutch may engage quickly, causing a shift shock, and if a heavy load is applied, In this case ((c) in FIG. 5), a problem occurs in which shifting quality is deteriorated due to changes in load conditions added to the agricultural vehicle 1, such as the driver feeling uncomfortable due to the slow response of the clutch.

In contrast, in the clutch 110 control method and system using load estimation in the automatic transmission 100 according to an embodiment of the present invention, the clutch transmission rate changes according to the change in the load applied to the agricultural vehicle 1. By estimating the workload added to the agricultural vehicle 1 in consideration of the load and controlling the clutch 110 in consideration of the estimated workload, the occurrence of shift shock due to changes in load is suppressed and the shift is performed. Deterioration in quality can be effectively prevented.

More specifically, in the clutch 110 control method and system using load estimation in the automated transmission 100 according to an embodiment of the present invention, as can be seen in FIG. 6, the workload clutch transfer rate information (FIG. By comparing (a) of 6 with the predetermined standard load clutch transmission rate information ((b) of FIG. 6), if the workload clutch transmission rate information increases faster than the standard load clutch transmission rate information, the workload is It is determined to be a light load lower than the standard load, and if the workload clutch transmission rate information increases more slowly than the standard load clutch transmission rate information, the workload can be determined to be a heavy load higher than the standard load.

Furthermore, in calculating the workload in the clutch 110 control method and system using load estimation in the automated transmission 100 according to an embodiment of the present invention, the workload clutch transfer rate information and the reference load clutch The workload being added to the agricultural vehicle 1 can also be calculated from the degree of difference in transmission rate information.

More specifically, in the workload calculation step (S300), the control unit 130 determines the response time (=workload response time) of the clutch transmission rate for the clutch 110 in the workload state ((a1 in FIG. 6) )) or slope (=workload slope) ((a2) in Figure 6) compared to a predetermined standard load response time ((b1) in Figure 6) or standard load slope ((b2) in Figure 6). It is also possible to calculate the workload being added to the agricultural vehicle 1 by considering the degree of difference.

Hereinafter, the method of controlling the clutch 110 of the automated transmission 100 according to an embodiment of the present invention will be described in more detail by dividing it into each step.

First, in the clutch pedal state determination step (S100), the control unit 130 determines whether the clutch pedal 200 is in a pressed state.

At this time, the state in which the clutch pedal 200 is pressed refers to a case in which the driver presses the clutch pedal 200 to a predetermined position and the clutch 110 is released. That is, when the clutch pedal 200 is in a pressed state, the clutch 110 is released, so the shift characteristics of the clutch 110 change due to the workload caused by a work tool attached to the agricultural vehicle 1, such as a tractor. does not appear, it becomes difficult to estimate the workload or even correct the operation of the clutch 110 using the estimated workload. In the present invention, when the clutch pedal 200 is in a pressed state, the workload is The calculation and correction process of the clutch 110 may not proceed (step S210 in FIG. 7).

More specifically, in the clutch pedal state determination step (S100), the control unit 130 uses the position information of the clutch pedal 200 transmitted from the clutch pedal sensor 210 to determine the clutch pedal 200. When located within a predetermined range, it may be determined that the clutch pedal 200 is in a pressed state.

At this time, the position information of the clutch pedal 200 may include position information according to the displacement of the clutch pedal 200 due to the driver's manipulation. Furthermore, the position information may be measured at predetermined periodic intervals, or the time at which each position information was measured may be included and used to calculate the release speed of the clutch pedal 200.

At this time, various sensors that can appropriately measure the displacement of the clutch pedal 200, such as a potentiometer, may be used as the clutch pedal sensor 210.

In addition, the control unit 130 may be implemented using a transmission control unit (TCU), but the present invention is not limited thereto, and may also be implemented using an engine control unit (ECU) or a separate control circuit. It can also be configured using .

Accordingly, the clutch pedal sensor 210 transmits the location information to the control unit 130 using a predetermined electrical signal.

Next, in the workload clutch transmission rate information collection step (S200), information on the clutch transmission rate (=workload clutch transmission rate) of the clutch 110 in a state in which a workload is added to the agricultural vehicle 1 is collected. do.

Here, the clutch transmission rate of the clutch 110 refers to the ratio of the output rotation speed to the input rotation speed during the joining process of the clutch 110 (i.e., (clutch 110 output shaft RPM) / (engine 2 RPM) )), and accordingly, the workload clutch transmission rate information refers to the rotation of the output shaft of the clutch 110 during the engagement process of the clutch 110 in a state in which a workload is added to the agricultural vehicle 1. It can be calculated using the number and rotation speed information of the engine 2.

In addition, in the present invention, the control unit 130 does not necessarily need to calculate the workload clutch transfer rate information using the rotation speed of the output shaft of the clutch 110 and the rotation speed information of the engine 2. In addition, the clutch ( 110) using other information such as the input shaft rotation speed information, or generated by the Engine Control Unit (ECU) for the engine 2 or the Transmission Control Unit (TCU) for the transmission 5. It is also possible to generate the workload clutch transfer rate information using the information provided.

At this time, the workload clutch transfer rate information may include the response time (=workload response time) and slope (=workload slope) of the clutch transfer rate for the clutch 110 in the workload state.

Here, the workload response time is calculated from the end point of fill-up control for the clutch 110 ((A) in FIG. 6) to the workload clutch transfer rate ((a) in FIG. 6) as a predetermined response time measurement standard value (FIG. The time required to increase to (c1)) in Figure 6 may be ((a1) in Figure 6), but the present invention is not necessarily limited thereto, and in addition, the time may be based on a time other than the end time of the fill-up control. The above ((a) in FIG. 6) may refer to the time required to increase to a predetermined response time measurement standard ((c1) in FIG. 6).

In addition, the workload slope is determined by the workload clutch transfer rate in the clutch 110 ((a) in Figure 6) from a predetermined first slope measurement standard value ((c21) in Figure 6) to a second slope measurement standard value (Figure 6(a)). It may be the ratio (ΔP1/Δt1) of the time required to increase to (c22) of 6 (Δt1 in FIG. 6) and the increase in workload clutch transfer rate (ΔP1 in FIG. 6) during that time.

Additionally, in the workload calculation step (S300), the workload is calculated by comparing the workload clutch transfer rate information with predetermined reference load clutch transfer rate information.

That is, in calculating the workload added to the agricultural vehicle 1 in the workload calculation step (S300), the workload clutch transmission rate information ((a) of FIG. 6) and the reference load clutch transmission rate information (FIG. 6 It is also possible to calculate the workload being added to the agricultural vehicle 1 from the degree of difference in (b)).

Furthermore, the control unit 130 uses one of the response time (=workload response time) and slope (=workload slope) of the clutch transmission rate for the clutch 110 in the workload state, or The workload can be calculated using both response time and workload slope.

More specifically, in the workload calculation step (S300), the control unit 130 determines the response time (=workload response time) of the clutch transmission rate for the clutch 110 in the workload state ((a1 in FIG. 6) )) or slope (=workload slope) ((a2) in Figure 6) compared to a predetermined standard load response time ((b1) in Figure 6) or standard load slope ((b2) in Figure 6). It is also possible to calculate the workload being added to the agricultural vehicle 1 by considering the degree of difference.

At this time, the workload response time ((a1) in FIG. 6) is determined by the workload clutch transfer rate ((a) in FIG. 6) from the end of fill-up control for the clutch 110 ((A) in FIG. 6). It may refer to the time required to increase to a predetermined response time measurement standard ((c1) in FIG. 6), but the present invention is not necessarily limited thereto, and in addition, from a point other than the end of the fill-up control, It may also refer to the time taken until the workload clutch transfer rate ((a) in FIG. 6) increases to a predetermined response time measurement standard ((c1) in FIG. 6).

In addition, the workload slope ((a2) in FIG. 6) is a first slope measurement reference value ((c21) in FIG. 6) where the workload clutch transfer rate ((a) in FIG. 6) of the clutch 110 is predetermined. The ratio (ΔP1/Δt1) of the time required to increase from the second slope measurement reference value ((c22) in FIG. 6) to the increase in workload clutch transmission rate (ΔP1 in FIG. 6) during that time. it means.

Furthermore, in the workload calculation step (S300), the control unit 130 calculates the workload added to the agricultural work vehicle 1 by considering both the workload response time and the workload slope, so that the calculated workload The accuracy can also be improved.

For example, as can be seen in FIG. 7, when the clutch pedal 200 is not in a pressed state, after calculating the workload response time (S230) and the workload slope (S230), the calculated work After calculating the workload being added to the agricultural vehicle 1 by comparing the load response time and workload slope with the standard load response time and standard load slope, the clutch 110 takes the calculated workload into consideration. By correcting the hydraulic profile (S240), it is possible to suppress the occurrence of shift shock due to changes in the workload added to the agricultural work vehicle 1 and effectively prevent deterioration of shift quality.

In addition, in the workload calculation step (S300), the control unit 130 calculates the workload response time ((a1) in FIG. 6) and the standard load response time ( The difference between (b1) in Figure 6 multiplied by a predetermined response time correction ratio (=M) or the difference between the workload slope ((a2) in Figure 6) and the reference load slope ((b2) in Figure 6) The workload (=O) can be calculated by adding or subtracting one or more of the values multiplied by the predetermined tilt correction ratio (=N), and this can be expressed in the formula as follows.

[Equation 1]

Workload (O) = Base load (L) + M * (Workload response time - Base load response time) + N * (Workload slope - Base load slope)

Furthermore, in the method of controlling the clutch 110 of the automated transmission 100 according to an embodiment of the present invention, as can be seen in FIGS. 8A and 86B, only the workload slope information is used in the workload clutch transfer rate information. The workload can be calculated (FIG. 8a), or the workload can be calculated (FIG. 8b) using only the workload response time information.

That is, as can be seen in Figure 8a, even if only the workload slope ((a2) in Figure 8a) is calculated and compared with the standard load slope ((b2) in Figure 8a), the difference is used to calculate the agricultural work vehicle (1). ) It is possible to calculate the workload added to the load, and as can be seen in FIG. 8b, only the workload response time ((a1) in FIG. 8b) is calculated and this is calculated as the standard load response time ((b1 in FIG. 8b) ), it is possible to calculate the workload added to the agricultural work vehicle (1) using the difference.

However, if the workload is calculated by comparing both the workload slope and the workload response time with the reference load rather than using only one of the workload slope or the workload response time, the workload that can appear in various load environments Since it is possible to reduce the possibility of errors occurring and increase the accuracy of the calculated workload, it is more desirable to calculate the workload by considering both the workload slope and the workload response time.

Finally, in the clutch control step (S400), the operation of the clutch 110 is controlled in consideration of the calculated workload.

At this time, the control unit 130 can control the operation of the clutch 110 by adjusting the hydraulic profile of the clutch 110 according to the calculated workload. Furthermore, the control unit 130 can control the operation of the clutch 110 according to the pre-stored workload. Operations such as engagement of the clutch 110 can be controlled by using a hydraulic profile or by adjusting the driving pressure or slope in the hydraulic profile according to the difference between the work load and the reference load.

Accordingly, in the control unit 130, as can be seen in FIG. 9, when the calculated work load is lighter ((a1) in FIG. 9) than the reference load ((b1) in FIG. 9), the clutch 110 ) In order to prevent shift shock, etc. from occurring as the clutch 110 is rapidly engaged, a hydraulic profile that allows the clutch 110 to be engaged more slowly is applied ((a2) in FIG. 9), and the calculated workload is In the case of a heavier load ((c1) in FIG. 9) than the standard load ((b1) in FIG. 9), the clutch 110 is engaged too slowly to prevent shifting quality from being deteriorated due to slow shifting. The operation of the clutch 110 can be controlled by applying a hydraulic profile that allows the clutch 110 to be joined more quickly ((c2) in FIG. 9).

Accordingly, in the method of controlling the clutch 110 of the automated transmission 100 according to an embodiment of the present invention, the change in clutch transmission rate according to the change in the load applied to the agricultural vehicle 1 is taken into consideration. By estimating the workload added to (1) and controlling the clutch 110 in consideration of the estimated workload, the occurrence of shift shock due to changes in load can be suppressed and deterioration of shift quality can be effectively prevented. It becomes possible.

The above description is merely an illustrative explanation of the technical idea of the present invention, and those skilled in the art will be able to make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. It would be possible. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

(1): Agricultural work vehicle (2): Engine
(5): Transmission (10): Clutch pedal
(100): Automatic transmission (110): Clutch
(111): Piston (112): Plate
(113): Disk (114): Return spring
(120): Clutch valve (130): Control unit
(200): Clutch pedal (210): Clutch pedal sensor

Claims (8)

In a method of controlling the clutch 110 in consideration of the workload added to the agricultural work vehicle 1,
A clutch pedal state determination step (S100) in which the control unit 130 determines whether the clutch pedal 200 is in a pressed state;
A workload clutch transmission rate information collection step (S200) of collecting information on the clutch transmission rate (=workload clutch transmission rate) of the clutch 110 in the workload state;
A workload calculation step (S300) of calculating the workload by comparing the workload clutch transfer rate information with predetermined reference load clutch transfer rate information; and
A clutch control step (S400) of controlling the operation of the clutch 110 in consideration of the calculated workload;
Including,
In the workload calculation step (S300),
Calculating the workload using one or more of the response time (=workload response time) and slope (=workload slope) of the clutch transmission rate for the clutch 110 in the workload state,
The workload slope is the time (Δt) required for the workload clutch transmission rate in the clutch 110 to increase from a predetermined first slope measurement standard value to the second slope measurement standard value and the increase in workload clutch transmission rate during that time ( A method of controlling the clutch 110 in the automated transmission 100, characterized in that the ratio of ΔP) is (ΔP/Δt). According to paragraph 1,
In the clutch pedal state determination step (S100),
The control unit 130 uses the position information of the clutch pedal 200 received from the clutch pedal sensor 210 to determine that the clutch pedal 200 is in a press state when it is located in a predetermined range. Method for controlling clutch 110 in automated transmission 100. delete According to paragraph 1,
The workload response time is the time taken from the end of fill-up control for the clutch 110 to the time when the workload clutch transmission rate increases to a predetermined response time measurement standard in the automated transmission 100. Clutch 110 control method. delete According to paragraph 1,
In the workload calculation step (S300),
When the control unit 130 calculates the workload,
Based on a predetermined standard load, the difference between the workload response time and the standard load response time is multiplied by a predetermined response time correction ratio, or the difference between the workload slope and the standard load slope is multiplied by a predetermined slope correction ratio. A method of controlling the clutch 110 in an automated transmission 100, characterized in that the workload is calculated by adding or subtracting one or more of the following. According to paragraph 1,
In the workload clutch transfer rate information collection step (S200),
The control unit 130 uses information generated by the engine control unit (ECU) for the engine 2 of the agricultural vehicle 1 or the transmission control unit (TCU) for the transmission 5 to control the workload. A method of controlling the clutch 110 in an automated transmission 100, characterized by collecting clutch transmission rate information. According to paragraph 1,
In the clutch control step (S400),
A method of controlling the clutch 110 in an automated transmission 100, characterized in that the operation of the clutch 110 is controlled by adjusting the hydraulic profile of the clutch 110 according to the calculated workload.

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