Energy-saving control method of corn harvester and corn harvester

Abstract

The embodiment of the invention discloses an energy-saving control method of a corn harvester and the corn harvester, and belongs to the technical field of equipment control. The corn harvester comprises a control handle, an engine and hydraulic equipment, and the energy-saving control method of the corn harvester comprises the steps that the energy-saving mode type of the corn harvester is determined in response to a received energy-saving mode request; under the condition that the energy-saving mode is an operation energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time rotating speed of the engine is adjusted to the target working rotating speed according to the opening interval where the real-time opening value of the control handle is located; and under the condition that the real-time rotating speed of the engine is the target working rotating speed, the displacement current of the hydraulic equipment is adjusted according to the real-time opening value of the control handle. Through power matching between the rotating speed of the engine and the hydraulic equipment, the overall power consumption of the corn harvester is reduced, and then the situation that the power of the corn harvester is excessive is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of equipment control, and in particular to an energy-saving control method of a corn harvester and a corn harvester. Background Art

[0002] Corn harvester is a kind of agricultural machinery used for multiple operations such as picking ears of corn, stacking and returning corn to the field. With the rapid development of agricultural machinery manufacturing technology, hydraulically driven corn harvesters have been widely used. Usually, users can control the driving speed of the corn harvester by operating the handle, and adjust the driving speed of the corn harvester by operating the handle at different openings. In addition, the user controls the engine speed of the corn harvester within a certain range by operating the throttle. Due to the characteristics of the fixed transmission ratio of the mechanical structure, the speed of the working equipment of the corn harvester is proportional to the engine speed, and then the harvesting operation is carried out in the field through the working equipment.

[0003] However, when the corn harvester is in motion, the engine speed is adjusted based on the user's personal experience to achieve engine output power control. If the engine speed is not adjusted accurately, it is easy for the engine to have a large throttle and a small displacement of the hydraulic pump, which will lead to excessive engine output power of the silage harvester and low volumetric efficiency of the hydraulic pump when working in a small displacement range. In addition, when the corn harvester is working in the field, the throttle opening is adjusted based on the user's personal experience, which may easily cause the engine speed to not match the operating requirements of the corn harvester, further leading to excess power of the corn harvester. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an energy-saving control method for a corn harvester and a corn harvester. The energy-saving control method for a corn harvester is used to solve the problem of excess power of the corn harvester in the prior art.

[0005] In order to achieve the above-mentioned purpose, the first aspect of the present application provides an energy-saving control method for a corn harvester, the corn harvester comprising a control handle, an engine, a working device and a hydraulic device, and the energy-saving control method for the corn harvester comprises:

[0006] In response to the received energy-saving mode request, determining an energy-saving mode type of the corn harvester;

[0007] Determine the real-time opening value of the control handle;

[0008] When the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to a preset minimum speed;

[0009] When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine and the displacement current of the hydraulic device are adjusted according to the real-time opening value of the control handle;

[0010] When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to the target operating speed according to the opening range of the real-time opening value of the control handle, wherein the opening of the control handle in the operation energy-saving mode is divided into at least two continuous opening ranges, and the target operating speed is the speed corresponding to the maximum operating speed of the working equipment in the opening range;

[0011] When the real-time speed of the engine is the target operating speed, the displacement current of the hydraulic equipment is adjusted according to the real-time opening value of the control handle.

[0012] In the embodiment of the present application, when the energy-saving mode is the driving energy-saving mode, the real-time speed of the engine and the displacement current of the hydraulic device are adjusted according to the real-time opening value of the control handle, including:

[0013] When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to a preset working speed, wherein the preset working speed is greater than the preset minimum speed and less than the target working speed;

[0014] Determine whether the real-time opening value of the control handle exceeds a preset opening threshold, wherein the preset opening threshold is the opening of the control handle corresponding to the maximum displacement current of the hydraulic device;

[0015] When the real-time opening value of the control handle exceeds the preset opening threshold, the displacement current of the hydraulic equipment is adjusted to the maximum displacement current, and the real-time speed of the engine is adjusted according to the preset working speed, the target working speed, the real-time opening value of the control handle and the maximum opening value of the control handle;

[0016] When the real-time opening value of the control handle does not exceed the preset opening threshold, determining whether the operating parameter of the engine exceeds the operating parameter threshold corresponding to the preset working speed;

[0017] When the operating parameters of the engine do not exceed the operating parameter threshold corresponding to the preset working speed, the target speed of the engine is determined according to the real-time opening value of the control handle and the target current, wherein the target current is the displacement current corresponding to the highest volumetric efficiency of the hydraulic equipment;

[0018] The real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic equipment is adjusted to the target current.

[0019] In an embodiment of the present application, the target speed of the engine is determined according to the real-time opening value of the control handle and the target current, including:

[0020] The target speed of the engine is determined according to the real-time opening value of the control handle, the preset opening threshold, the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the displacement corresponding to the maximum displacement current and the displacement corresponding to the minimum displacement current.

[0021] In the embodiment of the present application, the calculation formula of the target speed of the engine is:

[0022]

[0023] Among them, N mb is the target speed of the engine, I max is the maximum displacement of the hydraulic equipment, I min is the minimum displacement of the hydraulic equipment, V max is the displacement corresponding to the maximum displacement current of the hydraulic equipment, V min is the displacement corresponding to the minimum displacement current of the hydraulic equipment, N1 is the preset working speed, Ki is the real-time opening value of the control handle, K1 is the preset opening threshold, ηi is the volumetric efficiency value corresponding to the real-time opening value of the control handle, Vzj is the maximum displacement corresponding to the highest range of volumetric efficiency of the hydraulic pump of the hydraulic equipment, and ηzj is the optimal volumetric efficiency value of the hydraulic equipment.

[0024] In an embodiment of the present application, the real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic device is adjusted to the target current, and then the following is further included:

[0025] Determine the current travel speed of the corn harvester when the real-time speed of the engine is the target speed and the displacement current of the hydraulic device is the target current;

[0026] Calculate the speed difference between the current driving speed and the original driving speed, wherein the original driving speed is the driving speed of the corn harvester corresponding to the real-time opening value of the control handle;

[0027] When the speed difference is greater than the preset speed threshold, the target current is updated based on the preset current interval value, the target speed is updated based on the preset speed interval value, and the steps of adjusting the real-time speed of the engine to the target speed and adjusting the displacement current of the hydraulic equipment to the target current are executed.

[0028] In an embodiment of the present application, when the real-time speed of the engine is the target operating speed, adjusting the displacement current of the hydraulic device according to the real-time opening value of the control handle includes:

[0029] When the real-time speed of the engine is the target operating speed, the real-time speed of the engine is adjusted according to the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the real-time opening value of the control handle and the maximum opening value of the control handle.

[0030] In an embodiment of the present application, the corn harvester further comprises a cooling device;

[0031] When the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed, including:

[0032] When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed;

[0033] When the energy-saving mode is the operating energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed, and the real-time speed of the engine is updated according to the temperature parameters of the cooling equipment.

[0034] In an embodiment of the present application, updating the real-time speed of the engine according to the temperature parameter of the cooling device includes:

[0035] Get the temperature parameters of the cooling equipment;

[0036] determining whether a temperature parameter of the cooling device is below a preset temperature threshold;

[0037] When the temperature parameter of the cooling device is lower than a preset temperature threshold, the real-time speed of the engine is updated based on the preset speed difference.

[0038] In an embodiment of the present application, the energy-saving control method of the corn harvester further includes:

[0039] When the real-time opening value of the control handle is not a positive value, determining whether the operating parameter of the engine exceeds the operating parameter threshold corresponding to the real-time speed;

[0040] When the operating parameter of the engine exceeds the operating parameter threshold corresponding to the real-time speed, the real-time speed of the engine is updated based on the preset speed difference.

[0041] In an embodiment of the present application, the energy-saving control method of the corn harvester further includes:

[0042] Obtain the required power of the engine;

[0043] Adjust the power gear of the engine according to the power ratio of the required power at the real-time engine speed.

[0044] A second aspect of the present application provides a corn harvester, comprising:

[0045] A control device configured to implement the energy-saving control method of the corn harvester described above;

[0046] A hydraulic device configured to drive the corn harvester;

[0047] an engine configured to drive a hydraulic device;

[0048] A control handle configured to adjust the real-time opening value in response to a user's operation; and

[0049] Working equipment is configured to perform corn harvesting operations.

[0050] The present application provides an energy-saving control method for a corn harvester, the corn harvester comprising a control handle, an engine and a hydraulic device, the energy-saving control method for the corn harvester comprising: determining the energy-saving mode type of the corn harvester in response to a received energy-saving mode request; determining the real-time opening value of the control handle; when the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed; when the energy-saving mode is a driving energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle; when the energy-saving mode is an operating energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine to a target operating speed according to the opening range of the real-time opening value of the control handle; when the real-time speed of the engine is the target operating speed, adjusting the displacement current of the hydraulic device according to the real-time opening value of the control handle. By identifying the state of the corn harvester and dynamically adjusting the engine speed and / or the displacement current of the hydraulic equipment, power matching between the engine speed and the hydraulic equipment is achieved, reducing the overall power consumption of the corn harvester, thereby avoiding the situation of excess power of the corn harvester.

[0051] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0053] Figure 1 The flowchart of the first energy-saving control method of a corn harvester according to an embodiment of the present application is schematically shown;

[0054] Figure 2 A schematic diagram of a flow chart of a second energy-saving control method for a corn harvester according to an embodiment of the present application is shown;

[0055] Figure 3 A schematic diagram of a flow chart of a third energy-saving control method for a corn harvester according to an embodiment of the present application is shown;

[0056] Figure 4 A schematic diagram of a flow chart of a fourth energy-saving control method for a corn harvester according to an embodiment of the present application is shown;

[0057] Figure 5 The structural diagram of a corn harvester according to an embodiment of the present application is schematically shown.

[0058] Description of Reference Numerals

[0059] 200-corn harvester; 210-control device, 220-hydraulic equipment, 230-engine, 240-control handle, 250-travel mechanism, 260-mechanical transmission structure, 270-working equipment, 280-cooling equipment; 221-hydraulic variable pump, 222-hydraulic motor. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0061] It should be noted that if the embodiments of the present application involve directional indications (such as left, right, front and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0063] Figure 1The flowchart of the first energy-saving control method for a corn harvester according to an embodiment of the present application is schematically shown. Figure 1 As shown, an embodiment of the present application provides an energy-saving control method for a corn harvester. The corn harvester includes a control handle, an engine, working equipment and hydraulic equipment. The energy-saving control method for the corn harvester includes:

[0064] S110, responding to the received energy-saving mode request, determining the energy-saving mode type of the corn harvester.

[0065] The corn harvester in this embodiment includes a control handle, an engine, a hydraulic device, a working device and other devices. The types of other devices are set according to actual needs, and cooling devices, etc., are not limited here. In addition, the corn harvester in this embodiment provides a normal mode and an energy-saving mode. When the corn harvester is in the normal mode, the corn harvester adjusts the engine speed and the displacement of the hydraulic device according to the user's control.

[0066] When the corn harvester is in energy-saving mode, the power consumption of the whole machine of the corn harvester is reduced by matching the engine speed with the power of the hydraulic equipment. Specifically, the energy-saving mode of the corn harvester in this embodiment includes a walking energy-saving mode and an operation energy-saving mode. The walking energy-saving mode is a mode in which the corn harvester only travels in the field or on the road and does not perform corn harvesting operations. The operation energy-saving mode is a mode in which the corn harvester performs corn harvesting operations.

[0067] In response to the received energy-saving mode request, the energy-saving mode type of the corn harvester is determined to adjust the engine speed according to the equipment status of the corn harvester. Specifically, the sensor can be used to detect the main clutch signal and the operation equipment action signal, etc., and the energy-saving mode type of the corn harvester can be determined according to the signal of the sensor. For ease of understanding, the sensor is used to detect the type of the main clutch signal in the embodiment of the present application. When the main clutch engagement signal is disconnected, the energy-saving mode of the corn harvester is determined to be the driving energy-saving mode. When the main clutch engagement signal is engaged, the energy-saving mode of the corn harvester is determined to be the operating energy-saving mode.

[0068] S120, determining the real-time opening value of the control handle.

[0069] Determine the real-time opening value of the control handle in real time. For ease of understanding, in the embodiment of the present application, the user can push the operating lever of the control handle in a Z shape to adjust the real-time opening value of the control handle. When the operating lever of the control handle is in the middle position, the corn harvester stops moving. When the operating lever of the control handle is pushed along the right front, the real-time opening value of the control handle is a positive value, and the corn harvester moves forward. When the operating lever of the control handle is pushed along the left rear, the real-time opening value of the control handle is a negative value, and the corn harvester moves backward. The user can control the walking speed of the corn harvester by adjusting the real-time opening value of the control handle.

[0070] S130, when the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed.

[0071] The real-time speed of the engine is the speed of the engine when the corn harvester is running. The preset minimum speed and target operating speed of the engine can be preset. The preset minimum speed is the lowest speed allowed by the engine when the corn harvester is running, and the target operating speed is the highest speed allowed by the engine when the corn harvester is running. It should be understood that the values ​​of the preset minimum speed and the target operating speed are set according to actual needs and are not limited here.

[0072] When the real-time opening value of the control handle is not a positive value, the state of the corn harvester is determined to be one of the following: field transfer, backward movement, static idling and unloading. The real-time speed of the engine is reduced to a preset minimum speed to reduce the power consumption of the whole corn harvester.

[0073] S140, when the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle.

[0074] It should be understood that the corn harvester in this embodiment also includes a traveling mechanism, the engine drives the hydraulic device, and the hydraulic device then drives the traveling mechanism to travel.

[0075] When the energy-saving mode of the corn harvester is the driving energy-saving mode and the real-time opening value of the control handle is positive, it is determined that the corn harvester drives forward and does not perform corn harvesting operations. The signal of the control handle is detected to obtain the real-time opening value of the control handle. According to the real-time opening value of the control handle, the real-time speed of the engine and the displacement current of the hydraulic equipment are adjusted to match the speed of the engine with the load of the hydraulic equipment, so that the corn harvester is in a low energy consumption zone while meeting the driving speed requirements of the corn harvester.

[0076] S150, when the energy-saving mode is the operating energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to the target operating speed according to the opening range of the real-time opening value of the control handle, wherein the opening of the control handle in the operating energy-saving mode is divided into at least two continuous opening ranges, and the target operating speed is the speed corresponding to the maximum operating speed of the working equipment in the opening range.

[0077] It should be understood that the corn harvester in this embodiment also includes a mechanical transmission mechanism, and the engine is connected to the working equipment through the mechanical transmission structure. Mechanical transmission mechanisms such as chain transmission, gear transmission and belt transmission have the characteristics of fixed transmission ratios, and the speed of the working equipment is proportional to the speed of the engine and is stable within a certain range.

[0078] When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is a positive value, it is determined that the corn harvester moves forward and performs corn harvesting operations. The engine needs to supply energy to the working equipment and the walking mechanism at the same time, and the real-time speed of the engine is adjusted to the target working speed according to the opening range of the real-time opening value of the control handle to meet the operation requirements of the corn harvester. Specifically, the opening of the control handle in the operation energy-saving mode is preset to be divided into at least two continuous opening ranges, and different opening ranges correspond to different target working speeds output by the engine. The number of divided opening ranges is based on actual needs and is not limited here. Assuming that the real-time opening value of the control handle is in the first opening range, the target working speed is determined as the speed corresponding to the maximum operating speed of the working equipment in the first opening range, and the real-time speed of the engine is adjusted to the target working speed.

[0079] S160, when the real-time speed of the engine is the target operating speed, adjusting the displacement current of the hydraulic equipment according to the real-time opening value of the control handle.

[0080] When the corn harvester is in the energy-saving mode and driving forward, the engine speed is maintained at the target operating speed. During the actual corn harvesting operation of the corn harvester, the corn feeding amount will fluctuate dynamically. When the corn feeding amount is small, the corn harvester is prone to overpower. When the real-time engine speed is the target operating speed, the displacement current is determined by the handle opening and is not automatically adjusted. According to the real-time opening value of the control handle, the displacement current of the hydraulic equipment is adjusted. At the same time, the output power gear of the engine is adjusted according to the proportion of the engine output power to optimize the power matching between the engine speed and the hydraulic equipment and reduce the power consumption of the corn harvester. By identifying the state of the corn harvester and dynamically adjusting the engine speed and / or the displacement current of the hydraulic equipment, the power matching between the engine speed and the hydraulic equipment is achieved, the power consumption of the corn harvester is reduced, and the overpower of the corn harvester is avoided.

[0081] Figure 2 The flowchart of the second energy-saving control method for a corn harvester according to an embodiment of the present application is schematically shown.

[0082] In the embodiment of the present application, S160, when the real-time speed of the engine is the target operating speed, adjusting the displacement current of the hydraulic device according to the real-time opening value of the control handle includes:

[0083] S161, when the real-time speed of the engine is the target operating speed, the real-time speed of the engine is adjusted according to the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the real-time opening value of the control handle and the maximum opening value of the control handle.

[0084] When the real-time speed of the engine is the target operating speed, the displacement current of the hydraulic device is adjusted according to the real-time opening value of the control handle to optimize the power matching between the engine speed and the hydraulic device. Specifically, according to the maximum displacement current of the hydraulic device, the minimum displacement current of the hydraulic device, the real-time opening value of the control handle and the maximum opening value of the control handle, the real-time speed of the engine is adjusted to (I max -I min )*Ki / Kmax, where I max is the maximum displacement current of the hydraulic equipment, I min is the minimum displacement current of the hydraulic equipment, Ki is the real-time opening value of the control handle, and Kmax is the maximum opening value of the control handle.

[0085] In an embodiment of the present application, the corn harvester further comprises a cooling device;

[0086] When the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed, including:

[0087] When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed.

[0088] In an embodiment of the present application, the energy-saving control method of the corn harvester further includes:

[0089] S170, obtaining the required power of the engine, and adjusting the power gear of the engine according to the power ratio of the required power at the real-time speed of the engine.

[0090] The sensor is used to detect the real-time pressure and / or real-time displacement of the hydraulic equipment, and the required power of the engine is obtained according to the real-time pressure and / or real-time displacement of the hydraulic equipment. The power gear of the engine is adjusted according to the power ratio of the required power at the real-time speed of the engine.

[0091] It should be understood that the engine can preset n power gears. For ease of understanding, in the embodiment of the present application, n is 10, that is, when the power gear of the engine is 1 to 10, the engine can output 100% of the power at the real-time speed. Assuming that the power gear of the engine is adjusted to 1 to 4 in the walking energy-saving mode, the engine can output 40% of the power at the real-time speed. Assuming that the power gear of the engine is adjusted to 1 to 7 in the walking energy-saving mode, the engine can output 70% of the power at the real-time speed. In this embodiment, when the real-time opening value of the control handle is not a positive value, after adjusting the real-time speed of the engine to the preset minimum speed, and / or when the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is a positive value, after adjusting the real-time speed of the engine to the target working speed, the step of obtaining the required power of the engine is performed, so that the corn harvester can operate at the optimal working point under the condition of poor corn harvest by adjusting the power gear of the engine, and the rest of the flowchart is no longer shown.

[0092] Figure 3 The flowchart of the third energy-saving control method for a corn harvester according to an embodiment of the present application is schematically shown.

[0093] S130, when the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed, including:

[0094] S131, when the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed;

[0095] Update the real-time engine speed according to the temperature parameters of the cooling equipment.

[0096] In this embodiment, the engine is connected to the cooling device through a mechanical transmission structure. When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to a preset minimum speed, and the cooling device operates at a fixed speed according to the speed of the engine and the transmission ratio of the mechanical transmission structure.

[0097] When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to the preset minimum speed. Since the engine is also connected to the working equipment through a mechanical transmission structure, when the working equipment also runs at a constant speed according to the transmission ratio of the mechanical transmission structure, it is easy for the power of the cooling equipment to not match, and the real-time speed of the engine needs to be updated according to the temperature parameters of the cooling equipment. It should be understood that the temperature parameters of the cooling equipment can be at least one of the engine coolant temperature, the charge air cooling system temperature and the hydraulic oil temperature, which is not limited here.

[0098] In an embodiment of the present application, updating the real-time speed of the engine according to the temperature parameter of the cooling device includes:

[0099] S132, obtaining temperature parameters of the cooling device;

[0100] S133, determining whether the temperature parameter of the cooling device is lower than a preset temperature threshold;

[0101] S133: When the temperature parameter of the cooling device is lower than a preset temperature threshold, the real-time speed of the engine is updated based on a preset speed difference.

[0102] When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is not a positive value, after reducing the engine speed to the preset minimum speed, obtain the temperature parameter of the cooling device, and determine whether the temperature parameter of the cooling device is lower than the preset temperature threshold. When the temperature parameter of the cooling device is lower than the preset temperature threshold, it is determined that the power of the cooling device is mismatched, which is likely to cause waste of engine output power. Based on the preset speed difference, the real-time speed of the engine is updated until the temperature parameter of the cooling device is higher than the preset temperature threshold to avoid waste of engine output power and reduce the power consumption of the corn harvester.

[0103] In an embodiment of the present application, the energy-saving control method of the corn harvester further includes:

[0104] S1301, when the real-time opening value of the control handle is not a positive value, determining whether the operating parameter of the engine exceeds the operating parameter threshold corresponding to the real-time speed;

[0105] S1302: When the operating parameter of the engine exceeds the operating parameter threshold corresponding to the real-time speed, the real-time speed of the engine is updated based on a preset speed difference.

[0106] When the real-time opening value of the control handle is not a positive value, no matter the energy-saving mode of the corn harvester is the driving energy-saving mode or the operating energy-saving mode, after the real-time speed of the engine is reduced to the preset minimum speed, it is necessary to determine whether the operating parameters of the engine exceed the operating parameter threshold corresponding to the real-time speed to determine whether there is a power shortage. It should be understood that the operating parameter threshold is set according to actual needs and is not limited here. For ease of understanding, the operating parameter threshold in the embodiment of the present application is the maximum operating parameter corresponding to the engine can run stably at the current real-time speed.

[0107] Figure 4 The flowchart of the fourth energy-saving control method for a corn harvester according to an embodiment of the present application is schematically shown.

[0108] In the embodiment of the present application, S140, when the energy-saving mode is the driving energy-saving mode, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle includes:

[0109] S141, when the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine to a preset working speed, wherein the preset working speed is greater than a preset minimum speed and less than a target working speed;

[0110] S142, determining whether the real-time opening value of the control handle exceeds a preset opening threshold, wherein the preset opening threshold is the opening of the control handle corresponding to the maximum displacement current of the hydraulic equipment;

[0111] S143, when the real-time opening value of the control handle exceeds the preset opening threshold, adjusting the displacement current of the hydraulic equipment to the maximum displacement current, and adjusting the real-time speed of the engine according to the preset working speed, the target working speed, the real-time opening value of the control handle and the maximum opening value of the control handle;

[0112] S144, when the real-time opening value of the control handle does not exceed the preset opening threshold, determining whether the operating parameter of the engine exceeds the operating parameter threshold corresponding to the preset working speed;

[0113] S145, when the operating parameter of the engine does not exceed the operating parameter threshold corresponding to the preset working speed, determining the target speed of the engine according to the real-time opening value of the control handle and the target current, wherein the target current is the displacement current corresponding to the highest volumetric efficiency of the hydraulic equipment;

[0114] S146, adjusting the real-time speed of the engine to the target speed, and adjusting the displacement current of the hydraulic equipment to the target current.

[0115] When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to a preset working speed that is greater than the preset minimum speed and less than the target working speed. According to the real-time opening value of the control handle, it is determined whether to reduce the speed of the engine or to maintain the speed of the engine at the preset working speed. Specifically, it is determined whether the real-time opening value of the control handle exceeds a preset opening threshold, and the preset opening threshold is the opening of the control handle corresponding to the maximum displacement current of the hydraulic device.

[0116] When the real-time opening value of the control handle does not exceed the preset opening threshold, the engine speed is maintained at the preset working speed. The real-time opening value of the control handle is proportional to the displacement current of the hydraulic device. The displacement current of the hydraulic device increases linearly according to the real-time opening value of the control handle to (I max -Imin )*Ki / K1, where, I max is the maximum displacement current of the hydraulic equipment, I min is the minimum displacement current of the hydraulic equipment, Ki is the real-time opening value of the control handle, and K1 is the preset opening threshold.

[0117] It should be understood that the operating parameters of the engine may be at least one of the load rate, torque percentage and real-time power of the engine, which is not limited here. Each speed value of the engine corresponds to an operating parameter threshold. When the engine speed is maintained at the preset working speed, determine whether the operating parameters of the engine exceed the operating parameter threshold corresponding to the preset working speed. When the operating parameters of the engine do not exceed the operating parameter threshold corresponding to the preset working speed, the target speed of the engine is determined based on the real-time opening value and target current of the control handle, while ensuring that the driving speed of the corn harvester is consistent, wherein the target current is the displacement current corresponding to the highest volumetric efficiency of the hydraulic equipment. The real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic equipment is adjusted to the target current, so that the corn harvester is in a low energy consumption area while meeting the driving speed requirements of the corn harvester.

[0118] When the real-time opening value of the control handle exceeds the preset opening threshold, the real-time opening value of the control handle is not proportional to the displacement current of the hydraulic equipment. After the displacement current of the hydraulic equipment is adjusted to the maximum displacement current, the displacement current of the hydraulic equipment cannot be further increased. According to the preset working speed, target working speed, real-time opening value of the control handle and the maximum opening value of the control handle, the real-time speed of the engine is adjusted to N1+(N max -N1)*(Ki-K1) / (Kmax-Ki), where, N max is the target operating speed, N1 is the preset operating speed, Ki is the real-time opening value of the control handle, Kmax is the maximum opening value of the control handle, and K1 is the preset opening threshold. When the displacement current of the hydraulic equipment cannot be further increased, the engine speed is linearly increased to make the engine and the travel system work in a low energy consumption area as a whole while meeting the driving speed requirements of the corn harvester, thereby avoiding excess power of the corn harvester.

[0119] In an embodiment of the present application, the target speed of the engine is determined according to the real-time opening value of the control handle and the target current, including:

[0120] The target speed of the engine is determined according to the real-time opening value of the control handle, the preset opening threshold, the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the displacement corresponding to the maximum displacement current and the displacement corresponding to the minimum displacement current.

[0121] When the operating parameters of the engine do not exceed the operating parameter threshold corresponding to the preset working speed, and under the premise of ensuring the consistent driving speed of the corn harvester, the target speed of the engine is determined according to the real-time opening value of the control handle, the preset opening threshold, the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the displacement corresponding to the maximum displacement current and the displacement corresponding to the minimum displacement current.

[0122] In the embodiment of the present application, the calculation formula of the target speed of the engine is:

[0123]

[0124] Among them, N mb is the target speed of the engine, I max is the maximum displacement of the hydraulic equipment, I min is the minimum displacement of the hydraulic equipment, V max is the displacement corresponding to the maximum displacement current of the hydraulic equipment, V min is the displacement corresponding to the minimum displacement current of the hydraulic equipment, N1 is the preset working speed, Ki is the real-time opening value of the control handle, K1 is the preset opening threshold, ηi is the volumetric efficiency value corresponding to the real-time opening value of the control handle, Vzj is the maximum displacement corresponding to the highest range of volumetric efficiency of the hydraulic pump of the hydraulic equipment, that is, the displacement corresponding to the target current, and ηzj is the optimal volumetric efficiency value of the hydraulic equipment.

[0125] When the operating parameters of the engine exceed the operating parameter threshold corresponding to the real-time speed, the real-time speed of the engine is increased based on the preset speed difference. By determining whether the operating parameters of the engine exceed the operating parameter threshold corresponding to the real-time speed, the power shortage of the corn harvester is avoided, the engine speed is adjusted to meet the power demand of the corn harvester, and the power consumption of the corn harvester is reduced.

[0126] In an embodiment of the present application, the real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic device is adjusted to the target current, and then the following is further included:

[0127] S1401, determining a current travel speed of the corn harvester when the real-time speed of the engine is the target speed and the displacement current of the hydraulic device is the target current;

[0128] S1402, calculating the speed difference between the current driving speed and the original driving speed, wherein the original driving speed is the driving speed of the corn harvester corresponding to the real-time opening value of the control handle;

[0129] S1403: When the speed difference is greater than a preset speed threshold, the target current is updated based on a preset current interval value, and the target speed is updated based on a preset speed interval value.

[0130] When the corn harvester is in normal mode, the original driving speed is the driving speed of the corn harvester corresponding to the real-time opening value of the control handle. When the real-time speed of the engine is the target speed and the displacement current of the hydraulic equipment is the target current, the current driving speed of the corn harvester is determined. The speed difference between the current driving speed and the original driving speed is calculated. When the speed difference is less than the preset speed threshold, it is determined that the adjusted target current and target speed meet the requirements of the original driving speed, the real-time speed of the engine is maintained at the target speed, and the displacement current of the hydraulic equipment is maintained at the target current.

[0131] In the case where the speed difference is greater than the preset speed threshold, the target current is updated based on the preset current interval value, and it is determined that the adjusted target current and target speed do not meet the requirements of the original driving speed. The target current is updated based on the preset current interval value, and the target speed is updated based on the preset speed interval value. Specifically, in the case where the current driving speed is greater than the original driving speed and the speed difference is greater than the preset speed threshold, the target current is reduced based on the preset current interval value, and the target speed is reduced based on the preset speed interval value. In the case where the current driving speed is less than the original driving speed and the speed difference is greater than the preset speed threshold, the target current is increased based on the preset current interval value, and the target speed is increased based on the preset speed interval value. After updating the target current and target speed, the steps of adjusting the real-time speed of the engine to the target speed and adjusting the displacement current of the hydraulic equipment to the target current are executed, and it is determined whether the requirements of the original driving speed are met.

[0132] The present application provides an energy-saving control method for a corn harvester, the corn harvester comprising a control handle, an engine and a hydraulic device, the energy-saving control method for the corn harvester comprising: determining the energy-saving mode type of the corn harvester in response to a received energy-saving mode request; determining the real-time opening value of the control handle; when the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed; when the energy-saving mode is a driving energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle; when the energy-saving mode is an operating energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine to a target operating speed according to the opening range of the real-time opening value of the control handle; when the real-time speed of the engine is the target operating speed, adjusting the displacement current of the hydraulic device according to the real-time opening value of the control handle. By identifying the state of the corn harvester and dynamically adjusting the engine speed and / or the displacement current of the hydraulic equipment, power matching between the engine speed and the hydraulic equipment is achieved, reducing the overall power consumption of the corn harvester, thereby avoiding the situation of excess power of the corn harvester.

[0133] The present application also provides a control device, including:

[0134] a memory configured to store instructions; and

[0135] The processor is configured to call instructions from the memory and implement the above-mentioned energy-saving control method of the corn harvester when executing the instructions.

[0136] The processor includes a kernel, which calls the corresponding program unit from the memory. The kernel can be set to one or more, and the problem of excess power of the corn harvester can be solved by adjusting the kernel parameters.

[0137] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0138] Figure 5 The structure diagram of a corn harvester according to an embodiment of the present application is schematically shown. Figure 5 As shown, the embodiment of the present application provides a corn harvester 200, comprising:

[0139] The control device 210 is configured to implement the energy-saving control method of the corn harvester 200 described above;

[0140] The hydraulic device 220 is configured to drive the corn harvester 200 to travel;

[0141] An engine 230 configured to drive the hydraulic device 220;

[0142] A control handle 240, configured to adjust the real-time opening value in response to a user's operation; and

[0143] The working equipment 270 is configured to perform corn harvesting operations.

[0144] The control handle 240 is connected to the engine 230 through the control device 210, and the control device 210 adjusts the speed of the engine 230 according to the real-time opening value of the detected control handle. It should be understood that the corn harvester 200 also includes other devices and other equipment, and the types of other devices and other equipment are set according to actual needs and are not limited here. For ease of understanding, in the embodiment of the present application, other devices and other equipment include a walking mechanism 250, a mechanical transmission structure 260, a working device 270 and a cooling device 280, and the hydraulic device 220 includes a hydraulic variable pump 221 and a hydraulic motor 222. The type of the working device 270 is set according to actual needs, and can be a dust removal fan, an elevator, an upper exhaust fan, a grain agitator, a peeling mechanism, a bract chopper, a field return machine and a header mechanism, etc., which are not limited here. The type of the cooling device 280 is also set according to actual needs, and can be a supercharged air cooler and a radiator, etc., which are not limited here.

[0145] The engine 230 is connected to the traveling mechanism 250 through the hydraulic variable pump 221 and the hydraulic motor 222 in turn to drive the traveling mechanism 250. The engine 230 is connected to the working equipment 270 through the mechanical transmission mechanism, and the working equipment 270 runs at a constant speed according to the speed of the engine 230 and the transmission ratio of the mechanical transmission structure 260. The engine 230 is connected to the cooling device 280 through the mechanical transmission mechanism 260, and the cooling device 280 runs at a constant speed according to the speed of the engine 230 and the transmission ratio of the mechanical transmission structure. Through the power matching between the speed of the engine 230 and the hydraulic device 220, the power consumption of the whole machine of the corn harvester 200 can be reduced, thereby avoiding the situation of excess power of the corn harvester 200.

[0146] An embodiment of the present application also provides a machine-readable storage medium, on which instructions are stored, and the instructions are used to enable the machine to execute the above-mentioned energy-saving control method of the corn harvester.

[0147] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0148] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0149] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0150] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0151] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0152] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0153] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0154] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0155] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for energy-saving control of a corn harvester, characterized in that: The corn harvester includes a control handle, an engine, a working device and a hydraulic device. The energy-saving control method of the corn harvester includes: In response to the received energy-saving mode request, determining an energy-saving mode type of the corn harvester; Determining the real-time opening value of the control handle; When the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed; When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle; When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to the target operating speed according to the opening range in which the real-time opening value of the control handle is located, wherein the opening of the control handle in the operation energy-saving mode is divided into at least two continuous opening ranges, and the target operating speed is the speed corresponding to the maximum operating speed of the working equipment in the opening range; When the real-time rotation speed of the engine is the target operating rotation speed, the displacement current of the hydraulic device is adjusted according to the real-time opening value of the control handle.

2. The method according to claim 1, characterized in that When the energy-saving mode is the driving energy-saving mode, adjusting the real-time speed of the engine and the displacement current of the hydraulic device according to the real-time opening value of the control handle includes: When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is a positive value, the real-time speed of the engine is adjusted to a preset working speed, wherein the preset working speed is greater than the preset minimum speed and less than the target working speed; Determining whether the real-time opening value of the control handle exceeds a preset opening threshold, wherein the preset opening threshold is the opening of the control handle corresponding to the maximum displacement current of the hydraulic device; When the real-time opening value of the control handle exceeds the preset opening threshold, the displacement current of the hydraulic equipment is adjusted to the maximum displacement current, and the real-time speed of the engine is adjusted according to the preset working speed, the target working speed, the real-time opening value of the control handle and the maximum opening value of the control handle; When the real-time opening value of the control handle does not exceed the preset opening threshold, determining whether the operating parameter of the engine exceeds the operating parameter threshold corresponding to the preset working speed; When the operating parameter of the engine does not exceed the operating parameter threshold corresponding to the preset working speed, the target speed of the engine is determined according to the real-time opening value of the control handle and the target current, wherein the target current is the displacement current corresponding to the highest volumetric efficiency of the hydraulic equipment; The real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic device is adjusted to the target current.

3. The method according to claim 2, characterized in that Determining the target speed of the engine according to the real-time opening value of the control handle and the target current includes: The target speed of the engine is determined according to the real-time opening value of the control handle, the preset opening threshold, the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the displacement corresponding to the maximum displacement current and the displacement corresponding to the minimum displacement current.

4. The method according to claim 2, characterized in that: The calculation formula of the target speed of the engine is: Among them, N mb is the target speed of the engine, I max is the maximum displacement of the hydraulic equipment, I min is the minimum displacement of the hydraulic equipment, V max is the displacement corresponding to the maximum displacement current of the hydraulic equipment, V min is the displacement corresponding to the minimum displacement current of the hydraulic equipment, N1 is the preset working speed, Ki is the real-time opening value of the control handle, K1 is the preset opening threshold, ηi is the volumetric efficiency value corresponding to the real-time opening value of the control handle, Vzj is the maximum displacement corresponding to the highest range of volumetric efficiency of the hydraulic pump of the hydraulic equipment, and ηzj is the optimal volumetric efficiency value of the hydraulic equipment.

5. The method according to claim 2, characterized in that: The method further comprises: adjusting the real-time speed of the engine to the target speed and adjusting the displacement current of the hydraulic device to the target current; and then: Determining the current travel speed of the corn harvester when the real-time speed of the engine is the target speed and the displacement current of the hydraulic device is the target current; Calculating the speed difference between the current driving speed and the original driving speed, wherein the original driving speed is the driving speed of the corn harvester corresponding to the real-time opening value of the control handle; When the speed difference is greater than a preset speed threshold, the target current is updated based on a preset current interval value, the target speed is updated based on a preset speed interval value, and the real-time speed of the engine is adjusted to the target speed, and the displacement current of the hydraulic equipment is adjusted to the target current step.

6. The method according to claim 1, characterized in that When the real-time speed of the engine is the target working speed, adjusting the displacement current of the hydraulic device according to the real-time opening value of the control handle includes: When the real-time speed of the engine is the target operating speed, the real-time speed of the engine is adjusted according to the maximum displacement current of the hydraulic equipment, the minimum displacement current of the hydraulic equipment, the real-time opening value of the control handle and the maximum opening value of the control handle.

7. The method according to claim 1, characterized in that The corn harvester also includes a cooling device; When the real-time opening value of the control handle is not a positive value, adjusting the real-time speed of the engine to a preset minimum speed includes: When the energy-saving mode is the driving energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to a preset minimum speed; When the energy-saving mode is the operation energy-saving mode and the real-time opening value of the control handle is not a positive value, the real-time speed of the engine is adjusted to a preset minimum speed, and the real-time speed of the engine is updated according to the temperature parameters of the cooling device.

8. The method according to claim 7, characterized in that The updating of the real-time speed of the engine according to the temperature parameter of the cooling device comprises: Obtaining temperature parameters of the cooling device; Determining whether a temperature parameter of the cooling device is lower than a preset temperature threshold; When the temperature parameter of the cooling device is lower than a preset temperature threshold, the real-time speed of the engine is updated based on a preset speed difference.

9. The method according to claim 8, characterized in that The energy-saving control method of the corn harvester also includes: When the real-time opening value of the control handle is not a positive value, determining whether the operating parameter of the engine exceeds an operating parameter threshold value corresponding to the real-time rotation speed; When the operating parameter of the engine exceeds the operating parameter threshold corresponding to the real-time speed, the real-time speed of the engine is updated based on a preset speed difference.

10. The method according to claim 1, characterized in that The energy-saving control method of the corn harvester also includes: The required power of the engine is obtained, and the power gear of the engine is adjusted according to the power ratio of the required power at the real-time speed of the engine.

11. A corn harvester, characterized in that: include: A control device configured to implement the energy-saving control method for a corn harvester according to any one of claims 1 to 10; A hydraulic device configured to drive the corn harvester to travel; an engine configured to drive the hydraulic device; A control handle is configured to respond to a user's operation and adjust the real-time opening value; as well as Working equipment is configured to perform corn harvesting operations.

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