Self-adaptive load regulation and control method and system for harvester engine power in energy-saving state

Abstract

The invention relates to the technical field of harvesters, and discloses a harvester engine rotating speed self-adaptive control method and system. The method comprises the steps that the harvester is in an initial operation state, the engine predicts the output power of the regulation model according to the engine power, and the controller judges whether the engine power meets the requirement of the current total power or not according to the rotating speed and data information fed back by the torque sensor. If the two powers are matched, the output power of the engine is kept unchanged; and if not, entering an engine power adjusting state, and controlling the electronic injection diesel engine to adjust power output by the controller. And according to the designed fuzzy controller, the fuel injection quantity of the electronic control fuel injector is automatically adjusted, and then the output power of the engine is adjusted. The current situations that the engine is high in oil consumption and the real-time power is not matched are changed, real-time adjustment in the engine power operation process is achieved, and the engine power matching efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of harvesters, and in particular to a method and system for adaptively controlling engine power load of a harvester in an energy-saving state. Background Art

[0002] The operating conditions of harvesters are complex. During operation, they are affected by factors such as crop height and density, grain moisture content, ground flatness, and travel speed. The engine power consumed is also different. In most cases, the engine cannot operate at the optimal working point, and may even cause speed loss, stalling, or even black smoke. Therefore, controlling the engine's power output has a great impact on the energy saving of the entire machine.

[0003] The Chinese invention patent with publication number CN115380700A discloses a combine harvester engine power adaptive control system and method, which can adaptively control the engine power of the combine harvester, so that the engine power and the working condition are optimally matched, greatly improving the engine power utilization rate and reducing fuel consumption. The Chinese invention patent with publication number CN118224004A discloses a harvester engine speed adaptive control method, system and harvester, which controls the engine speed adaptive working condition from the software level, maintains the engine speed at the optimal working point, avoids the energy waste caused by the mismatch between the engine speed and the working condition, and takes into account the harvester performance and fuel saving goals.

[0004] The above patents all perform adaptive control of engine power and formulate engine power distribution strategies under multiple working modes, but do not perform real-time control during the actual operation of the harvester. Moreover, the harvester is a nonlinear system, and the engine power regulation effect is poor, resulting in high fuel consumption. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a method and system for adaptive load control of harvester engine power in an energy-saving state.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for adaptively controlling the engine power of a harvester in an energy-saving state, comprising: The harvester is in the starting operation state.

[0007] The engine outputs power according to the engine power prediction and control model.

[0008] Obtain real-time torque and speed data information of engine and load components.

[0009] Based on the data information fed back by the speed and torque sensors, the controller determines whether the engine power meets the current total power requirement, that is, whether the engine power matches the total power of the load components.

[0010] If the two powers match, the engine output remains unchanged; if they do not match, that is, the engine output power is greater or less than the current total power demand, the engine enters the power adjustment state, and the controller controls the electronic fuel injection diesel engine to adjust the power output.

[0011] According to the designed fuzzy controller, the controller automatically adjusts the fuel injection amount of the electronic fuel injector, thereby adjusting the engine output power.

[0012] In order to solve the above technical problems, an embodiment of the present invention provides a harvester engine power adaptive load control system in an energy-saving state, comprising: an on-board controller, a speed sensor, a torque sensor, an image sensor, a pressure sensor electronically controlled diesel engine and a human-machine interaction interface. The product of the data obtained by the speed sensor and the torque sensor constitutes a power value.

[0013] The speed sensor is used to obtain the engine and load speeds, the torque sensor is used to obtain the engine and load torque, the image sensor is used to identify crop phenotypic characteristics, the pressure sensor obtains the feed amount, the electronically controlled diesel engine is used to output power, and the on-board controller is used for the engine power adaptive load control method described in any one of the above technical solutions.

[0014] Beneficial effects of the present invention: 1. An adaptive load control system for harvester engine power in energy-saving state innovatively establishes engine fuzzy control strategy and innovatively selects electronic fuel injection diesel engine as power output mechanism, thereby realizing adaptive intelligent control.

[0015] 2. It has changed the current situation of high engine fuel consumption and real-time power mismatch, realized real-time adjustment of engine power during operation, and greatly improved power matching efficiency.

[0016] 3. By adjusting the engine power output in real time, the system can achieve the best match according to the actual workload, avoid excessive power output, ensure stable and efficient operation of the equipment, and the control process is fully intelligent without the need for human intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 A flow chart of the engine power adaptive control method provided by an embodiment of the present invention; Figure 2 A schematic diagram of an engine power adaptive control system provided by an embodiment of the present invention; Figure 3 The engine power prediction and control model diagram provided by the embodiment of the present invention; Figure 4 A harvester feeding amount prediction model diagram provided by an embodiment of the present invention; Figure 5 A schematic diagram of power regulation of an electronic fuel injection diesel engine provided by an embodiment of the present invention; Figure 6 A fuzzy control principle diagram provided for an embodiment of the present invention; DETAILED DESCRIPTION

[0019] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof; The operating conditions of harvesters are complex. During operation, they are affected by factors such as crop height and density, grain moisture content, ground flatness, and travel speed. The engine power consumed is also different. In most cases, the engine cannot operate at the optimal working point, and may even cause speed loss, stalling, or even black smoke. Therefore, controlling the engine's power output has a great impact on the energy saving of the entire machine.

[0021] In order to solve the above technical problems, an embodiment of the present invention provides a method and system for adaptive load control of harvester engine power in an energy-saving state.

[0022] Figure 1 It is a flow chart of the engine power adaptive control method, such as Figure 1 As shown, the method includes: The harvester is in the initial operation state. According to the engine universal characteristic curve, the engine has a series of operating points composed of different speeds and torques at each output power. These different operating points constitute multiple equal power curves. At the same time, each operating point has a different fuel consumption rate, and the operating points with the same fuel consumption rate constitute a series of equal fuel consumption curves. When the equal power curve is tangent to the equal fuel consumption line, the tangent point is the lowest point of fuel consumption. This method is used to determine the optimal fuel consumption line of the engine.

[0023] Furthermore, the engine outputs power according to the engine power prediction and control model.

[0024] Furthermore, real-time torque and speed data information of the engine and load components are obtained.

[0025] Furthermore, based on the data information fed back by the speed and torque sensors, the controller determines whether the engine power meets the current total power requirement, that is, whether the engine power matches the total power of the load components.

[0026] Furthermore, if the two powers match, the engine output remains unchanged; if they do not match, that is, the engine output power is greater than or less than the current total power demand, the engine enters the power adjustment state, and the controller controls the electronic fuel injection diesel engine to adjust the power output.

[0027] Furthermore, according to the designed fuzzy controller, the controller automatically adjusts the fuel injection amount of the electronic fuel injector, thereby adjusting the engine output power.

[0028] As a further technical solution, the power prediction and control model is as follows: Figure 3 As shown, by inputting the phenotypic characteristics and mechanical characteristics data collected by the image sensor and the harvester load component sensor into the feed amount prediction model, the predicted value of the feed amount is further obtained, and the power is further output according to the feed amount-power matching library.

[0029] As a further technical solution, the feed amount prediction model is as follows Figure 4 As shown, the phenotypic characteristics and mechanical parameters are input into a neural network-based controller. The controller has three layers, including six input variables (moisture content, lodging density, plant condition, torque, speed, pressure) and one output variable (feeding amount). The predicted value of the feeding amount is obtained through the trained controller.

[0030] As a further technical solution, the regulation principle of the electronic fuel injection diesel engine is as follows: Figure 5 As shown in the figure, the electronic fuel injection diesel engine achieves precise fuel supply through the electronic control system, allowing the engine to achieve zero speed adjustment. This means that even if the torque fluctuates, it will not have a significant impact on the engine speed. The engine adjusts the injection amount based on the difference between the actual value detected by the sensor and the set value to ensure stable engine speed. This precise fuel supply control technology enables the electronic fuel injection diesel engine to have better power output performance and fuel efficiency.

[0031] As a further technical solution, the fuzzy controller principle is as follows Figure 6As shown in the figure, the power of the current engine and load is obtained, the total power difference and change rate of the engine and load are calculated, the power difference and change rate are converted into fuzzy variables, and fuzzy rules are established to describe the relationship between the input variables (power difference and change rate) and the output variables (electronic fuel injector). The maximum and minimum fuzzy reasoning method is used to convert the fuzzy rule table into a clear output. According to the output result after defuzzification, the electronic fuel injector is regulated to further adjust the engine output power.

[0032] like Figure 2 As shown, an embodiment of the present invention also provides a harvester engine power adaptive load control system in an energy-saving state, characterized in that it includes: an on-board controller, a speed sensor, a torque sensor, an image sensor, a pressure sensor, an electronically controlled diesel engine, CAN communication and a human-computer interaction interface.

[0033] Speed ​​sensor: used to obtain engine and load component speed information.

[0034] Torque sensor: used to obtain torque information of engine and load components.

[0035] Image sensors: used to identify crop phenotypic characteristics, including moisture content, lodging, density, and plant height.

[0036] Electronically controlled diesel engine: Precise fuel supply is achieved through an electronic control system, allowing the engine to achieve zero speed adjustment.

[0037] Human-machine interaction interface: used to display the speed and torque data of the engine and load components, and perform fault diagnosis.

[0038] The vehicle-mounted controller receives and sends data through the input port and the CAN bus, and outputs signals to the electronically controlled diesel engine through the control logic, and is used to execute the harvester engine power adaptive load control method provided in the above embodiment.

[0039] In the embodiment of the present invention, a signal acquisition device composed of a speed sensor, a torque sensor, an image sensor, a pressure sensor, etc. is used to provide vehicle status information; the on-board controller determines the current power matching degree according to the product of the speed and torque and adaptively adjusts the optimal engine power, so that the engine power and the operating conditions reach the optimal matching point, thereby improving the engine efficiency and reducing fuel consumption; the system uses the CAN line to realize data interaction between the electronically controlled diesel engine, the on-board controller, and the human-computer interaction interface.

[0040] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adaptive load control of harvester engine power in energy-saving state, It is characterized in that The engine outputs power according to the engine power prediction and control model. According to the data information fed back by the speed and torque sensors, the controller determines whether the engine power meets the current total power demand. If the two powers match, the engine output remains unchanged. If not, the engine power adjustment state is entered. The controller controls the electronic fuel injection diesel engine to adjust the power output. According to the designed fuzzy controller, the fuel injection amount of the electronic fuel injector is automatically adjusted to adjust the engine output power.

2. The method according to claim 1, It is characterized in that The power prediction and control model further obtains the predicted value of the feed amount by inputting the phenotypic characteristics and mechanical characteristics data collected by the image sensor and the harvester load component sensor into the feed amount prediction model, and further outputs the power according to the feed amount-power matching library.

3. The method according to claim 1, It is characterized in that The fuzzy controller converts the power difference and the rate of change into fuzzy variables, establishes fuzzy rules to convert the fuzzy rule table into clear outputs, and regulates the electronically controlled injector according to the defuzzified output results to further adjust the engine output power.

4. The method according to claim 2, It is characterized in that The feed amount prediction model inputs parameters such as phenotypic characteristics and mechanical quantities into a controller based on a neural network, and obtains a predicted value of the feed amount through a trained controller.

5. An adaptive load control system for harvester engine power in energy-saving state, It is characterized in that include: The vehicle controller, speed sensor, torque sensor, image sensor, pressure sensor electronically control the diesel engine and the human-machine interface. Among them, the product of the data obtained by the speed sensor and the torque sensor constitutes the power value.

6. The speed sensor is used to obtain the engine and load speeds, the torque sensor is used to obtain the engine and load torque, the image sensor is used to identify crop phenotypic characteristics, the pressure sensor obtains the feed amount, the electronically controlled diesel engine is used to output power, and the on-board controller is used to execute the engine power adaptive load control method described in any one of claims 1 to 4.

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