New energy tractor inching realization device and control method

Abstract

The application discloses a new energy tractor inching control method, relates to tractor control technology, and solves the technical problem that an operation mode of a connection of an existing agricultural implement and a rear suspension system at a tail of a tractor does not have the convenience and safety of operation. The control method comprises the following steps: when an operating state of the tractor is a static state and a gear of the tractor is N gear, an inching function activation switch electrically connected with a vehicle controller is controlled to activate the inching function; when the gear of the transmission is first gear, it is indicated that the inching function can be activated; inching-in switches and inching-out switches electrically connected with the vehicle controller are controlled to prevent false touch operation; inching operation is performed, and whether over-speed protection or over-time protection is performed is judged; when it is determined that over-speed protection or over-time protection is needed, the inching operation is stopped. The application further discloses a new energy tractor inching implementation device and control method. The application has the characteristics of high safety, convenient operation, rapid connection and the like.

Description

Technical Field

[0001] This invention relates to tractor control technology, and more specifically, to a device and control method for realizing inching motion of a new energy tractor. Background Technology

[0002] like Figure 1 As shown, during the use of a tractor, it is necessary to connect the implements to the rear suspension system at the rear of the tractor. This operation usually requires two people: one person operates the accelerator pedal in the cab to control the forward and backward movement of the tractor; the other person needs to be at the rear of the vehicle to adjust the relative position of the implements and the hydraulic suspension system of the tractor body to connect the implements.

[0003] This operating method prevents the driver in the cab from directly seeing the attachment status of farm implements behind. If the throttle is not properly controlled, it can easily cause speed fluctuations, which could harm farm implements or even people behind. It lacks both ease of operation and safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device and control method for realizing the inching motion of a new energy tractor, which addresses the shortcomings of the existing technology and solves the technical problem that the operation method of connecting agricultural implements to the rear suspension system of the tractor is not convenient and safe to operate.

[0005] The present invention discloses a method for controlling the inching motion of a new energy tractor, the method comprising,

[0006] Step 1: After powering on the vehicle controller, initialize the vehicle controller and obtain the tractor's operating status, tractor gear position, and gearbox gear position; Step 2: When the tractor is stationary and in neutral (N) gear, press and hold the inching function activation switch, which is electrically connected to the vehicle controller, to activate the inching function. Step 3: When the gearbox is in first gear after the inching function is activated, it indicates that the inching function can be activated, and proceed to Step 4. Step 4: Control the advance and retraction switches electrically connected to the vehicle controller to prevent accidental activation and observe the operation; Step 5: Control the inching advance switch and inching back switch to perform inching operation, and determine whether to perform overspeed protection or timeout protection; Step Six: When the inching function is no longer needed or when it is determined that overspeed protection or timeout protection is required, stop the inching operation and return to Step Five.

[0007] As a further improvement, in step four, the anti-accidental touch operation is to set the anti-accidental touch time and the disconnection time, press the in-step switch or the in-step back switch twice within the anti-accidental touch time, and keep the switch off according to the disconnection time, thereby confirming the driver's intention to use the in-step function.

[0008] Furthermore, in step five, the inching operation is to briefly press the inch forward switch or the inch backward switch, and the vehicle controller controls the main drive motor speed to increase from zero to the preset maximum speed within a preset first time, thereby realizing the instantaneous forward and reverse movement of the tractor. By pressing and holding the advance or reversal switch, the vehicle controller controls the main drive motor speed to increase from zero to the preset maximum speed within a preset second time period and continue to run at the maximum speed, thereby enabling the tractor to move forward or backward at a stable speed.

[0009] Furthermore, when the advance switch or retract switch is released, the main drive motor rotates to zero to stop.

[0010] Furthermore, in step five, the method for determining whether the overspeed protection needs to be performed is to set a speed threshold. When the speed of the main drive motor is greater than or equal to the speed threshold, the vehicle controller stops receiving the on / off status of the advance switch or the retraction switch.

[0011] Furthermore, in step five, the method for determining whether the timeout protection needs to be performed is as follows: a duration threshold and an effective timing time with an initial value of zero are set. When the vehicle controller receives the on / off state of the inch-advance switch or the inch-reverse switch, the effective timing time starts counting. When the effective timing time is equal to the duration threshold and the vehicle controller still receives the on / off state of the inch-advance switch or the inch-reverse switch, it indicates that there is a risk of sticking of the inch-advance switch or the inch-reverse switch, and the vehicle controller stops receiving the on / off state of the inch-advance switch or the inch-reverse switch.

[0012] Furthermore, in step two, during the process of pressing and holding the inching function activation switch, if the vehicle controller receives the on / off state of the inching advance switch or the inching retreat switch, or if the tractor is not in a stationary state or the tractor is not in neutral, then the inching function is not allowed to be activated.

[0013] Furthermore, in step one, the real-time speed of the tractor is obtained. If the real-time speed is greater than a preset speed threshold at any time, or if the tractor is not in neutral (N) gear, or if the brake is applied, then step two is not performed.

[0014] Furthermore, in step six, a stop time is set. If the vehicle controller does not receive the on / off status of the advance or retreat switch after the stop time, it returns to step five.

[0015] A device for achieving inching motion in a new energy tractor, characterized in that the device comprises, The inching function activation switch is located in the cockpit. The retraction switch is located at the mudguard at the rear of the tractor, or it can be extended to the outside of the vehicle body via a signal line; The inching switch is located at the mudguard at the rear of the tractor, or it can be extended to the outside of the vehicle body via a signal line; The vehicle controller, using the aforementioned new energy tractor inching control method, controls the tractor to perform inching activation, inching advance, or inching retraction actions based on the on / off states of the inching function activation switch, the inching retraction switch, and the inching advance switch.

[0016] Beneficial effects The advantages of this invention are: This invention allows for the prevention of accidental touch and observation of the tractor's forward and backward movement by pressing and holding the inch-in and inch-back switches electrically connected to the vehicle controller; it controls the inch-in and inch-back switches to perform inch-movement operations and determines whether overspeed protection or timeout protection is required; when overspeed protection or timeout protection is required, the inch-movement operation is stopped; thereby enabling a single person to operate the tractor to move slowly and smoothly in the forward and backward directions, with high safety, convenient operation, and quick engagement. Attached Figure Description

[0017] Figure 1 A simplified diagram of the existing new energy tractor control system structure; Figure 2 This is a schematic diagram of the inching control method for a new energy tractor according to the present invention; Figure 3 This is a simplified structural diagram of the new energy tractor inching realization device of the present invention.

[0018] Among them: 1-Internal combustion engine, 2-Generator, 3-Battery, 4-Main drive motor, 5-Gearbox, 6-Central drive and differential, 7-Wheel, 8-Rear suspension, 9-Implements, 10-Inch reverse switch, 11-Inch forward switch, 12-Vehicle controller, 13-Instrument display screen, 14-Inch power function activation switch. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0020] See Figures 2-3 ,likeFigure 2 As shown, the present invention provides a method for controlling the inching motion of a new energy tractor, the method comprising, Step 1: After powering on the vehicle controller 12, initialize the vehicle controller 12 after a 500ms delay, acquiring the tractor's operating status, tractor gear position, and gear position of transmission 5. At this time, the instrument display 13 shows "Inching function not activated". In Step 1, the real-time speed of the tractor is acquired. If the real-time speed exceeds a preset speed threshold at any time, or if the tractor is not in neutral (N) gear, or if the brake is applied, then Step 2 is not performed.

[0021] Step 2: When the tractor is stationary and in neutral (N) gear, press and hold the inching function activation switch 14 for three seconds to activate the inching function.

[0022] In step two, during the process of pressing and holding the inching function activation switch 14, if the vehicle controller 12 receives the on / off state of the inching advance switch 11 or the inching retreat switch 10, or if the tractor is not stationary or the tractor is not in neutral, then the inching function is not allowed to be activated. This is to prevent the tractor from moving in a way that is not intended by the driver after the inching function is activated. Furthermore, the instrument display screen 13 will display "Inching function activation conditions not met".

[0023] If, during the process of pressing and holding the "Inch Function Activation Switch", neither the "Inch Forward Switch" nor the "Inch Backward Switch" located at the rear of the tractor is turned on, and the tractor is stationary and in neutral, then proceed to the next step.

[0024] Step 3: When gearbox 5 is in first gear, it indicates that the inching function is activated, proceed to step 4. If gearbox 5 fails to engage first gear due to a malfunction or other reasons, the instrument display 13 will show "Gearbox not ready". If gearbox 5 successfully engages first gear from neutral, the instrument display 13 will indicate "Inching function activated", proceed to the next step.

[0025] Step 4: Press and hold the advance switch 11 and the retraction switch 10, which are electrically connected to the vehicle controller 12, to prevent accidental touch and observe.

[0026] In step four, the anti-accidental touch operation involves setting the anti-accidental touch time and the disconnection time. In this embodiment, the anti-accidental touch time is 3 seconds and the disconnection time is 5 seconds. During the anti-accidental touch time, the advance switch or the retractor switch is pressed twice, and the switch remains open according to the disconnection time. This confirms the driver's intention to use the inching function and prevents the tractor from moving due to accidental touch.

[0027] The no-operation time is set. In this embodiment, the no-operation time is 600 seconds. If the advance switch 11 or the retraction switch 10 is not pressed within 600 seconds, return to step three.

[0028] Step 5: Control the inching advance switch 11 and the inching retreat switch 10 to perform inching operation, and determine whether to perform overspeed protection or timeout protection.

[0029] In step five, the inching operation involves briefly pressing the inch forward switch 11 or the inch backward switch 10 to increase the speed of the main drive motor 4 from zero to the preset maximum speed within a preset first time, thereby achieving instantaneous forward and reverse movement of the tractor. In this embodiment, the first time is 10 seconds, and the maximum speed is 300 rpm.

[0030] By pressing and holding the advance switch 11 or the reversal switch 10, the speed of the main drive motor 4 is increased from zero to the preset maximum speed within a preset second time period, thereby enabling the tractor to move forward or backward at a stable speed. In this embodiment, the second time period is 1 minute.

[0031] When the advance switch 11 or the retraction switch 10 is released, the main drive motor 4 will stop at zero speed.

[0032] In step five, the method for determining whether overspeed protection is required is to set a speed threshold. When the main drive motor speed is greater than or equal to the speed threshold, the vehicle controller 12 stops receiving the on / off status of the advance switch 11 or the retraction switch 10. In this embodiment, the speed threshold is 350 rpm. The driver must press the advance switch 11 or the retraction switch 10 again, and the vehicle controller 12 will then respond to the "advance switch" or "retraction switch" command again.

[0033] In step five, the method for determining whether timeout protection is required is as follows: a duration threshold and an effective timing time with an initial value of zero are set. When the vehicle controller 12 receives the on / off state of the advance switch 11 or the retraction switch 10, the effective timing time begins to run. When the effective timing time is greater than or equal to the duration threshold, it indicates that the advance switch 11 or the retraction switch 10 has a risk of sticking, and the vehicle controller 12 stops receiving the on / off state of the advance switch 11 or the retraction switch 10. The advance switch 11 or the retraction switch 10 needs to be disconnected once. After the advance switch 11 or the retraction switch 10 is pressed again, the vehicle controller will respond to the "advance switch" or "retraction switch" command again.

[0034] Step Six: When it is determined that overspeed protection or timeout protection is required, stop the inching operation and return to Step Five.

[0035] When the driver does not need to use the inching forward or inching backward functions, he can return to the driver's cab and step on the brake or press and hold the inching function activation switch 14 for three seconds again. The vehicle controller will then exit the inching function mode, and the instrument display screen 13 will show "Inching function not activated".

[0036] In step six, a stop time is set. If the vehicle controller 12 does not receive the on / off status of the advance switch 11 or the retractor switch 10 within the stop time, it returns to step five. This prevents the driver from activating the inching function and then forgetting to turn it off after a long period of inactivity. The driver needs to repeat step four before the inching function can be used again.

[0037] like Figure 3 As shown, a device for realizing inching movement of a new energy tractor is provided, the device comprising, The inching function activation switch 14 is used to activate the inching function. It must be a self-resetting push-button switch installed in the cockpit.

[0038] The inching retraction switch 10 is used to implement the inching retraction function.

[0039] The advance switch 11 is used to enable the advance function. Both the advance switch 10 and the reverse switch 11 are installed on the mudguard at the rear of the tractor, or extended to the outside of the vehicle body via a signal line, so that the driver can operate the tractor forward or backward from behind the tractor when attaching implements.

[0040] The vehicle controller uses the aforementioned new energy tractor inching control method to control the vehicle to perform inching activation, inching advance, or inching retraction actions based on the switching states of the inching function activation switch 14, the inching retraction switch 10, and the inching advance switch 11.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for controlling the inching motion of a new energy tractor, characterized in that, The control method includes, Step 1: After powering on the vehicle controller (12), initialize the vehicle controller (12) and obtain the tractor's operating status, the tractor's gear position, and the gear position of the gearbox (5); Step 2: When the tractor is stationary and in neutral (N) gear, press and hold the inching function activation switch (14) which is electrically connected to the vehicle controller (12) to activate the inching function. Step 3: When the gearbox (5) is in first gear after the inching function is activated, it indicates that the inching function can be activated, and proceed to step 4. Step 4: Control the advance switch (11) and retreat switch (10) electrically connected to the vehicle controller (12) to perform anti-accidental touch operation and observe; Step 5: Control the inching advance switch (11) and the inching retreat switch (10) to perform inching operation, and determine whether overspeed protection or timeout protection is required; Step Six: When the inching function is no longer needed or when it is determined that overspeed protection or timeout protection is required, stop the inching operation and return to Step Five.

2. The inching control method for a new energy tractor according to claim 1, characterized in that, In step four, the anti-accidental touch operation involves setting an anti-accidental touch time and a disconnection time, pressing the inching forward switch or the inching backward switch twice within the anti-accidental touch time, and keeping the switch off according to the disconnection time, thereby confirming the driver's intention to use the inching function.

3. The inching control method for a new energy tractor according to claim 1, characterized in that, In step five, the inching operation is to briefly press the inch advance switch (11) or the inch retraction switch (10), and the vehicle controller (12) controls the main drive motor (4) to increase its speed from zero to the preset maximum speed within a preset first time, thereby realizing the instantaneous forward and reverse movement of the tractor; Press and hold the advance switch (11) or the retraction switch (10), and the vehicle controller (12) will control the main drive motor (4) to increase its speed from zero to the preset maximum speed within a preset second time period and continue to run at the maximum speed, thereby enabling the tractor to move forward or backward at a stable speed.

4. The inching control method for a new energy tractor according to claim 3, characterized in that, When the advance switch (11) or the retraction switch (10) is released, the main drive motor (4) rotates to zero to stop.

5. The inching control method for a new energy tractor according to claim 3, characterized in that, In step five, the method for determining whether the overspeed protection needs to be performed is to set a speed threshold. When the speed of the main drive motor is greater than or equal to the speed threshold, the vehicle controller (12) stops receiving the switching status of the inching switch (11) or the inching retraction switch (10).

6. The inching control method for a new energy tractor according to claim 5, characterized in that, In step five, the method for determining whether the timeout protection needs to be performed is to set a duration threshold and an effective timing time with an initial value of zero. When the vehicle controller (12) receives the switch status of the inching switch (11) or the inching switch (10), the effective timing time starts to count. When the effective timing time is equal to the duration threshold and the vehicle controller (12) still receives the switch status of the inching switch (11) or the inching switch (10), it indicates that there is a risk of sticking of the inching switch (11) or the inching switch (10), and then the vehicle controller (12) stops receiving the switch status of the inching switch (11) or the inching switch (10).

7. The inching control method for a new energy tractor according to claim 1, characterized in that, In step two, during the process of pressing and holding the inching function activation switch (14), when the vehicle controller (12) receives the switch status of the inching advance switch (11) or the inching retreat switch (10), or when the tractor is in a non-stationary state or the tractor is in a non-neutral gear, the inching function is not allowed to be activated.

8. The inching control method for a new energy tractor according to claim 1, characterized in that, In step one, the real-time speed of the tractor is obtained. If the real-time speed is greater than a preset speed threshold at any time, or if the tractor is not in neutral (N) gear, or if the brake is applied, then step two is not performed.

9. The inching control method for a new energy tractor according to claim 5, characterized in that, In step six, a stop time is set. If the vehicle controller (12) does not receive the switch status of the advance switch (11) or the retreat switch (10) after the stop time, it returns to step five.

10. A device for realizing inching motion of a new energy tractor, characterized in that, The device includes, The inching function activation switch (14) is located in the cockpit; The inching switch (10) is located at the mudguard at the rear of the tractor. An inching switch (11) is located at the mudguard at the rear of the tractor. The vehicle controller (12) uses the inching control method of any one of the claims 1-9 to control the tractor to perform inching activation, inching advance or inching retreat actions according to the switching state of the inching function activation switch (14), the switching state of the inching retreat switch (10) and the switching state of the inching advance switch (11).

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