Electric control engine control method and device based on hydraulic excavator

Abstract

The invention discloses an electronic control engine control method and device based on a hydraulic excavator, and the method comprises the steps that when the hydraulic excavator is in a working state, the hydraulic excavator judges whether the load rate of an electronic control engine is changed or not, and when it is judged that the load rate is changed, the electronic control engine is started; calculating according to the obtained current torque of the electric control engine and a preset algorithm model to obtain the current torque redundancy of the electric control engine, judging whether the torque redundancy meets a preset torque redundancy condition or not, and when it is judged that the torque redundancy does not meet the preset torque redundancy condition, starting the electric control engine; and the torque redundancy is input into a preset torque redundancy calculation model for calculation, a target relation curve matched with the torque redundancy is obtained, and the curve is used for determining the optimal output power matched with the current torque of the electric control engine. It can be seen that the electronic control engine can be intelligently controlled, the working efficiency of the electronic control engine can be improved, oil consumption is reduced, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to an electronically controlled engine control method and device based on a hydraulic excavator. Background Art

[0002] As the demand for engine service life and fuel consumption reduction of hydraulic excavators has become more and more urgent in recent years, most of the current engines use fixed speed control speed regulation, fixed throttle control speed regulation and fixed throttle control multiple speed regulation methods to control the engine. These speed and power controls are relatively simple and have strong adaptability to normal working conditions, but poor adaptability to special working conditions. It is difficult to fully utilize the engine's optimal economic fuel consumption area, and it is difficult to take into account the advantages of low speed drop and low fuel consumption. The above-mentioned speed control and power matching energy-saving control methods are difficult to meet market needs.

[0003] Therefore, a method and device for controlling an electronically controlled engine based on a hydraulic excavator are provided, which can intelligently control the speed and power of the electronically controlled engine of the hydraulic excavator, thereby helping to improve the working efficiency of the electronically controlled engine and the accuracy of its speed control while reducing fuel consumption and saving costs. Summary of the invention

[0004] The present invention provides a method and device for controlling an electronically controlled engine based on a hydraulic excavator, which can help improve the working efficiency of the electronically controlled engine and the accuracy of its speed control while reducing fuel consumption and saving costs.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses an electronically controlled engine control method based on a hydraulic excavator, the method comprising:

[0006] When the hydraulic excavator is in a working state, the hydraulic excavator determines whether the load rate of the electronically controlled engine changes;

[0007] When it is determined that the load rate of the electronically controlled engine has changed, the hydraulic excavator calculates according to the acquired current torque of the electronically controlled engine and a preset algorithm model to obtain the current torque surplus of the electronically controlled engine, and determines whether the torque surplus satisfies a preset torque surplus condition;

[0008] When it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, and the target relationship curve is used to determine the optimal output power matching the current torque of the electronically controlled engine.

[0009] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0010] When it is determined that the torque surplus meets the preset torque surplus condition, the hydraulic excavator determines that the control mode of the electronically controlled engine is fixed throttle speed regulation, and determines the output power matching the torque surplus of the electronically controlled engine;

[0011] The hydraulic excavator determines a target output power corresponding to a hydraulic device in the hydraulic excavator that matches the output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power.

[0012] As an optional implementation, in the first aspect of the present invention, the hydraulic excavator calculates according to the acquired current torque of the electronically controlled engine and a preset algorithm model to obtain the current torque redundancy of the electronically controlled engine, including:

[0013] The hydraulic excavator calculates the current theoretical output power of the electronically controlled engine according to the acquired current torque and angular velocity of the electronically controlled engine;

[0014] The hydraulic excavator calculates the actual output power of the electronically controlled engine according to the theoretical output power and the preset rotational loss power of the electronically controlled engine;

[0015] The calculation formula of the theoretical output power and the actual output power is:

[0016] W 理论 =Tω

[0017] W 实际 =W 理论 -W 损耗

[0018] The W 理论 is represented by the theoretical output power, T is represented by the current torque of the electronically controlled engine obtained, ω is represented by the current angular velocity of the electronically controlled engine obtained, and W 实际 Expressed as the actual output power, the W 损耗 Indicates the preset rotating parts loss power for the electronically controlled engine;

[0019] The hydraulic excavator calculates according to the actual output power and a preset algorithm model to obtain the current torque margin of the electronically controlled engine;

[0020] The calculation formula of the algorithm model is:

[0021]

[0022] Wherein, I represents the current torque margin of the electronically controlled engine, and W 额定 It is expressed as the rated output power of the electronically controlled engine.

[0023] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0024] The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area to determine an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area;

[0025] The hydraulic excavator determines the optimal output power matching the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area;

[0026] The preset specific fuel consumption curve regions include: a first specific fuel consumption curve region, a second specific fuel consumption curve region, a third specific fuel consumption curve region and a fourth specific fuel consumption curve region.

[0027] As an optional implementation, in the first aspect of the present invention, the target relationship curve is represented by a relationship curve between torque and speed corresponding to the electronically controlled engine;

[0028] When it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into a preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, including:

[0029] When it is determined that the torque surplus is less than or equal to a preset surplus threshold, the hydraulic excavator inputs the torque surplus into a preset torque surplus calculation model for calculation;

[0030] When the torque margin is a first threshold, the hydraulic excavator calculates a first relationship curve matching the torque margin through the torque margin calculation model;

[0031] When the torque margin is a second threshold, the hydraulic excavator calculates a second relationship curve matching the torque margin through the torque margin calculation model;

[0032] When the torque margin is a third threshold, the hydraulic excavator calculates a third relationship curve matching the torque margin through the torque margin calculation model.

[0033] As an optional implementation, in the first aspect of the present invention, the hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area, and determines an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area, including:

[0034] The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area;

[0035] When the target relationship curve is the first relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region;

[0036] When the target relationship curve is the second relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region;

[0037] When the target relationship curve is the third relationship curve, a curve region where the target relationship curve overlaps with the third specific fuel consumption curve region is determined as an optimal fuel consumption curve region.

[0038] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0039] The hydraulic excavator determines a target output power corresponding to the hydraulic device in the hydraulic excavator that matches the optimal output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power;

[0040] And, the specific fuel consumption curve area is determined as follows:

[0041] The hydraulic excavator obtains a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determines the specific fuel consumption curve area corresponding to each torque and speed based on the real-time fuel consumption value set.

[0042] The second aspect of the present invention discloses an electronically controlled engine control device based on a hydraulic excavator, the device comprising:

[0043] A judging module, used for judging whether the load rate of the electronically controlled engine changes when the hydraulic excavator is in working state;

[0044] a calculation module, configured to obtain the current torque margin of the electronically controlled engine by performing calculation according to the acquired current torque of the electronically controlled engine and a preset algorithm model when the judgment module judges that the load power of the electronically controlled engine changes;

[0045] The judging module is further used to judge whether the torque margin satisfies a preset torque margin condition;

[0046] The calculation module is also used to input the torque surplus into a preset torque surplus calculation model for calculation when the judgment module determines that the torque surplus does not meet the preset torque surplus condition, so as to obtain a target relationship curve matching the torque surplus. The target relationship curve is used to determine the optimal output power matching the current torque of the electronically controlled engine.

[0047] As an optional implementation, in the second aspect of the present invention, the device further includes:

[0048] A determination module, configured to determine that the control mode of the electronically controlled engine is fixed throttle speed regulation when the determination module determines that the torque surplus satisfies a preset torque surplus condition, and determine an output power that matches the torque surplus of the electronically controlled engine; and determine a target output power corresponding to the hydraulic device in the hydraulic excavator that matches the output power;

[0049] A regulating module is used to regulate the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the first determining module.

[0050] As an optional implementation, in the second aspect of the present invention, the calculation module performs calculation based on the acquired current torque of the electronically controlled engine and a preset algorithm model to obtain the current torque margin of the electronically controlled engine in a specific manner as follows:

[0051] Calculating the current theoretical output power of the electronically controlled engine according to the acquired current torque and angular velocity of the electronically controlled engine;

[0052] The actual output power of the electronically controlled engine is calculated based on the theoretical output power and the preset rotational loss power of the electronically controlled engine;

[0053] The calculation formula of the theoretical output power and the actual output power is:

[0054] W 理论 =Tω

[0055] W 实际 =W 理论 -W 损耗

[0056] The W 理论 is represented by the theoretical output power, T is represented by the current torque of the electronically controlled engine obtained, ω is represented by the current angular velocity of the electronically controlled engine obtained, and W 实际Expressed as the actual output power, the W 损耗 Indicates the preset rotating parts loss power for the electronically controlled engine;

[0057] Calculating according to the actual output power and a preset algorithm model to obtain the current torque margin of the electronically controlled engine;

[0058] The calculation formula of the algorithm model is:

[0059]

[0060] Wherein, I represents the current torque margin of the electronically controlled engine, and W 额定 It is expressed as the rated output power of the electronically controlled engine.

[0061] As an optional implementation, in the second aspect of the present invention, the device further includes:

[0062] a matching module, used for matching the target relationship curve calculated by the calculation module with a preset specific fuel consumption curve area, and determining an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area;

[0063] The determination module is further used to determine the optimal output power matching the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area matched by the matching module;

[0064] The preset specific fuel consumption curve regions include: a first specific fuel consumption curve region, a second specific fuel consumption curve region, a third specific fuel consumption curve region and a fourth specific fuel consumption curve region.

[0065] As an optional implementation, in the second aspect of the present invention, the target relationship curve is represented by a relationship curve between torque and speed corresponding to the electronically controlled engine;

[0066] When the judgment module determines that the torque surplus does not meet the preset torque surplus condition, the calculation module inputs the torque surplus into a preset torque surplus calculation model for calculation, and the specific method of obtaining the target relationship curve matching the torque surplus is:

[0067] When it is determined that the torque surplus is less than or equal to a preset surplus threshold, the torque surplus is input into a preset torque surplus calculation model for calculation;

[0068] When the torque margin is a first threshold, a first relationship curve matching the torque margin is calculated by the torque margin calculation model;

[0069] When the torque margin is a second threshold, a second relationship curve matching the torque margin is calculated by the torque margin calculation model;

[0070] When the torque margin is a third threshold, a third relationship curve matching the torque margin is calculated by the torque margin calculation model.

[0071] As an optional implementation, in the second aspect of the present invention, the matching module matches the target relationship curve with a preset specific fuel consumption curve area, and determines the optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area in a specific manner as follows:

[0072] The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area;

[0073] When the target relationship curve is the first relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region;

[0074] When the target relationship curve is the second relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region;

[0075] When the target relationship curve is the third relationship curve, a curve region where the target relationship curve overlaps with the third specific fuel consumption curve region is determined as an optimal fuel consumption curve region.

[0076] As an optional implementation, in the second aspect of the present invention, the determination module is further used to determine a target output power corresponding to the hydraulic device in the hydraulic excavator that matches the optimal output power;

[0077] The regulating module is further used to regulate the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the determining module;

[0078] And, the specific fuel consumption curve area is determined as follows:

[0079] The hydraulic excavator obtains a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determines a specific fuel consumption curve corresponding to each torque and speed based on the real-time fuel consumption value set.

[0080] The third aspect of the present invention discloses another electronically controlled engine control device based on a hydraulic excavator, the device comprising:

[0081] A memory storing executable program code;

[0082] a processor coupled to the memory;

[0083] The processor calls the executable program code stored in the memory to execute the electronically controlled engine control method based on a hydraulic excavator disclosed in the first aspect of the present invention.

[0084] The fourth aspect of the present invention discloses a computer storage medium, wherein the computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the electronically controlled engine control method based on a hydraulic excavator disclosed in the first aspect of the present invention.

[0085] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0086] The present invention provides an electronically controlled engine control method based on a hydraulic excavator, the method comprising: when the hydraulic excavator is in a working state, the hydraulic excavator determines whether the load rate of the electronically controlled engine changes, when it is determined that the load rate of the electronically controlled engine changes, the hydraulic excavator calculates according to the current torque of the electronically controlled engine obtained and a preset algorithm model, and obtains the current torque surplus of the electronically controlled engine, so that the output power of the electronically controlled engine can be determined by the torque surplus later, thereby improving the control accuracy of the electronically controlled engine; judging whether the torque surplus meets the preset torque surplus condition, when it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation, and obtains a target relationship curve matching the torque surplus, and the target relationship curve is used to determine the optimal output power matching the torque of the current electronically controlled engine. It can be seen that the implementation of the present invention can intelligently control the electronically controlled engine according to the relationship between the speed and power corresponding to the electronically controlled engine in the hydraulic excavator, thereby being conducive to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing fuel consumption and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0088] Figure 1 It is a flow chart of a method for controlling an electronically controlled engine based on a hydraulic excavator disclosed in an embodiment of the present invention;

[0089] Figure 2It is a flow chart of another electronically controlled engine control method based on a hydraulic excavator disclosed in an embodiment of the present invention;

[0090] Figure 3 It is a structural schematic diagram of an electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention;

[0091] Figure 4 It is a structural schematic diagram of another electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention;

[0092] Figure 5 It is a structural schematic diagram of another electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention;

[0093] Figure 6 The present invention discloses a curve diagram showing the relationship between torque and rotation speed of an electronically controlled engine. DETAILED DESCRIPTION

[0094] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0095] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0096] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0097] The present invention discloses a control method and device for an electronically controlled engine based on a hydraulic excavator. When the hydraulic excavator is in a working state, the hydraulic excavator can judge whether the load rate of the electronically controlled engine has changed. When it is judged that the load rate has changed, the current torque surplus of the electronically controlled engine is calculated according to the torque of the current electronically controlled engine obtained and a preset algorithm model, and the torque surplus is obtained. It is also judged whether the torque surplus meets the preset torque surplus condition. When it is judged that the preset torque surplus condition is not met, the torque surplus is input into the preset torque surplus calculation model for calculation, and a target relationship curve matching the torque surplus is obtained. The target relationship curve is used to determine the optimal output power matching the torque of the current electronically controlled engine, and the electronically controlled engine is intelligently controlled, which is beneficial to improve the working efficiency of the electronically controlled engine and the accuracy of its speed control, while reducing fuel consumption and saving costs. The following are detailed descriptions.

[0098] Embodiment 1

[0099] See also Figure 1 , Figure 1 1 is a flow chart of a method for controlling an electronically controlled engine based on a hydraulic excavator disclosed in an embodiment of the present invention. Figure 1 The described electronically controlled engine control method based on a hydraulic excavator can be applied to an electronically controlled engine control device of a hydraulic excavator, and the control device can be applied to a central electronic control system of a hydraulic excavator. The electronically controlled engine can be used to drive a hydraulic device (e.g., a hydraulic pump) of a hydraulic excavator to work, and the embodiments of the present invention are not limited thereto. Figure 1 As shown, the electronically controlled engine control method based on a hydraulic excavator may include the following operations:

[0100] 101. When the hydraulic excavator is in working state, the hydraulic excavator determines whether the load rate of the electronically controlled engine changes. When it is determined that the load rate of the electronically controlled engine changes, the operation of step 102 can be executed.

[0101] In the embodiment of the present invention, optionally, when it is determined that the load rate of the electronically controlled engine has not changed, the hydraulic excavator controls the electronically controlled engine to maintain the current original output power and speed control mode, and repeats the operation of step 101.

[0102] In this way, when the hydraulic excavator is in working state, the hydraulic excavator determines whether the load rate of the electronically controlled engine has changed, and performs different power and speed control on it according to the change of the load rate of the electronically controlled engine, which is beneficial to improve the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, reduce fuel consumption and save costs.

[0103] 102. The hydraulic excavator calculates the current torque redundancy of the electronically controlled engine according to the acquired current torque of the electronically controlled engine and a preset algorithm model.

[0104] In the embodiment of the present invention, optionally, the acquired current torque of the electronically controlled engine is the current theoretical maximum output working torque of the electronically controlled engine.

[0105] In the embodiment of the present invention, the hydraulic excavator calculates the current torque margin of the electronically controlled engine according to the acquired current torque of the electronically controlled engine and the preset algorithm model, which may include:

[0106] The hydraulic excavator calculates the current theoretical output power of the electronically controlled engine based on the current torque and angular velocity of the electronically controlled engine;

[0107] The hydraulic excavator calculates the actual output power of the electronically controlled engine based on the theoretical output power and the preset rotational loss power of the electronically controlled engine.

[0108] Among them, the calculation formula of theoretical output power and actual output power is:

[0109]

[0110] W 理论 =Tω

[0111] W 实际 =W 理论 -W 损耗

[0112] W 理论 is the theoretical output power, T is the current torque of the electronically controlled engine, ω is the current angular velocity of the electronically controlled engine (unit: radians / second), n is the current speed of the electronically controlled engine (unit: revolutions / minute), W 实际 Expressed as actual output power, W 损耗 Indicates the preset power loss of the rotating parts of the electronically controlled engine, W 损耗 It can be calculated by analyzing the engine torque lost when the engine is operating due to friction or loss.

[0113] The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the actual output power and the preset algorithm model.

[0114] The calculation formula of the algorithm model is:

[0115]

[0116] Where I represents the current torque surplus of the electronically controlled engine, W 额定Expressed as the rated output power of the electronically controlled engine.

[0117] In this way, the hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the current torque of the electronically controlled engine and the preset algorithm model, so as to subsequently calculate the target relationship curve that matches the torque margin, which is beneficial to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, reducing fuel consumption and saving costs.

[0118] 103. The hydraulic excavator determines whether the torque margin satisfies a preset torque margin condition. When it is determined that the torque margin does not satisfy the preset torque margin condition, the operation of step 104 may be performed.

[0119] In the embodiment of the present invention, optionally, the preset richness threshold may be 0.7 or 0.8, which is not limited in the embodiment of the present invention.

[0120] In an embodiment of the present invention, optionally, when it is determined that the torque margin satisfies a preset torque margin condition (i.e., the torque margin is greater than a preset margin threshold), the hydraulic excavator determines that the control mode of the electronically controlled engine is fixed throttle speed regulation, and determines the output power that matches the torque margin of the electronically controlled engine.

[0121] A target output power corresponding to a hydraulic device in a hydraulic excavator that matches the output power is determined, and the current of the hydraulic device in the hydraulic excavator is adjusted according to the target output power.

[0122] In this way, when it is judged that the torque surplus meets the preset torque surplus condition, the hydraulic excavator determines that the control mode of the electronically controlled engine is fixed throttle speed regulation, and determines the output power that matches the torque surplus of the electronically controlled engine, which is conducive to enriching the hydraulic excavator's diversified control modes for the electronically controlled engine and the accuracy of its speed control; or, when it is judged that the torque surplus does not meet the preset torque surplus condition, a target relationship curve matching the torque surplus is calculated based on the torque surplus, which is conducive to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control.

[0123] 104. The hydraulic excavator inputs the torque surplus into a preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus.

[0124] In the embodiment of the present invention, optionally, Figure 6 As shown, the ordinate represents the torque of the electronically controlled engine, the abscissa represents the speed of the electronically controlled engine, the target relationship curve represents the relationship curve between the torque and the speed corresponding to the electronically controlled engine, and the target relationship curve is used to determine the optimal output power that matches the current torque of the electronically controlled engine.

[0125] In the embodiment of the present invention, when it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, which may include:

[0126] When it is determined that the torque margin is less than or equal to the preset margin threshold, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation.

[0127] When the torque margin is a first threshold value (for example, 0.5), the hydraulic excavator calculates a first relationship curve (such as Figure 6 As shown, x1).

[0128] When the torque surplus is the second threshold value (for example, 0.6), the hydraulic excavator calculates the second relationship curve (for example, Figure 6 As shown, x2).

[0129] When the torque surplus is the third threshold value (for example, 0.7), the hydraulic excavator calculates the third relationship curve (for example, Figure 6 As shown, x3).

[0130] In this way, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation, and obtains the target relationship curve that matches the torque surplus, so that the target relationship curve can be used to subsequently determine the optimal output power that matches the torque of the current electronically controlled engine, which is beneficial to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing the fuel consumption of the hydraulic excavator and saving costs.

[0131] In an optional embodiment, after executing step 104, the method further includes the following operations:

[0132] The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area, and determines an optimal fuel consumption curve area where the target relationship curve coincides with the optimal specific fuel consumption curve area.

[0133] The hydraulic excavator determines the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve area.

[0134] Among them, Figure 6As shown, the preset specific fuel consumption curve area (unit: g / kW·h) represents the fuel consumption corresponding to the torque-speed relationship curve of the electronically controlled engine within this area. The preset specific fuel consumption curve area includes: at least one of the first specific fuel consumption curve area (-5 area), the second specific fuel consumption curve area (-3 area), the third specific fuel consumption curve area (-2 area) and the fourth specific fuel consumption curve area (-0 area), and the fuel saving degree is: -5 area>-3 area>-2 area>-0 area.

[0135] In this optional embodiment, further optionally, the hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area to determine an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area, which may include:

[0136] The hydraulic excavator matches the target relationship curve with the preset specific fuel consumption curve area.

[0137] When the target relationship curve is the first relationship curve, a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0138] When the target relationship curve is the second relationship curve, a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0139] When the target relationship curve is the third relationship curve, a curve region where the target relationship curve overlaps with the third specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0140] In this optional embodiment, after the hydraulic excavator determines the optimal output power that matches the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area, the method further includes the following operations:

[0141] The hydraulic excavator determines a target output power corresponding to a hydraulic device in the hydraulic excavator that matches the optimal output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power.

[0142] It can be seen that this optional embodiment is able to match the target relationship curve with the preset specific fuel consumption curve area, determine the optimal fuel consumption curve area where the target relationship curve coincides with the optimal specific fuel consumption curve area, and thereby determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve area, which is beneficial to reducing the fuel consumption of the electronically controlled engine and saving costs; and after the hydraulic excavator determines the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve area, determine the target output power corresponding to the hydraulic device that matches the optimal output power, and adjust the current of the hydraulic device in the hydraulic excavator according to the target output power, which is beneficial to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's control of its speed, while reducing the fuel consumption of the hydraulic excavator and saving costs.

[0143] Embodiment 2

[0144] See also Figure 2 , Figure 2 1 is a flow chart of a method for controlling an electronically controlled engine based on a hydraulic excavator disclosed in an embodiment of the present invention. Figure 2 The described electronically controlled engine control method based on a hydraulic excavator can be applied to an electronically controlled engine control device of a hydraulic excavator, and the control device can be applied to a central electronic control system of a hydraulic excavator. The electronically controlled engine can be used to drive a hydraulic device (e.g., a hydraulic pump) of a hydraulic excavator to work, and the embodiments of the present invention are not limited thereto. Figure 2 As shown, the electronically controlled engine control method based on a hydraulic excavator may include the following operations:

[0145] 201. When the hydraulic excavator is in a working state, the hydraulic excavator obtains in real time a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determines the specific fuel consumption curve area corresponding to each torque and speed based on the real-time fuel consumption value set.

[0146] 202. The hydraulic excavator determines whether the load rate of the electronically controlled engine has changed. When it is determined that the load rate of the electronically controlled engine has changed, the operation of step 203 may be executed.

[0147] 203. The hydraulic excavator calculates the current torque margin of the electronically controlled engine according to the acquired current torque of the electronically controlled engine and a preset algorithm model.

[0148] 204 . Determine whether the torque margin satisfies a preset torque margin condition. When it is determined that the torque margin does not satisfy the preset torque margin condition, the operation of step 205 may be performed.

[0149] 205. The hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation to obtain a target relationship curve matching the torque margin.

[0150] 206. The hydraulic excavator matches the target relationship curve with the preset specific fuel consumption curve area, determines the optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area, and determines the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve area.

[0151] In the embodiment of the present invention, for other descriptions of step 202 to step 206, please refer to the detailed description of step 101 to step 104 in the first embodiment, and the embodiment of the present invention will not be repeated.

[0152] It can be seen that the implementation of the embodiment of the present invention can enable the hydraulic excavator to obtain, in real time, a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in the working state in the past, and determine the specific fuel consumption curve area corresponding to each torque and speed according to the real-time fuel consumption value set, so as to subsequently determine the optimal output power matching the current torque and speed of the electronically controlled engine according to the determined optimal fuel consumption curve area, thereby helping to improve the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing fuel consumption and saving costs.

[0153] It can be seen that implementation Figure 2 The described electronically controlled engine control method based on a hydraulic excavator can, when the hydraulic excavator is in a working state, obtain in real time a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determine the specific fuel consumption curve area corresponding to each torque and speed according to the real-time fuel consumption value set, so as to subsequently determine the optimal output power matching the current torque and speed of the electronically controlled engine according to the determined optimal fuel consumption curve area; it can judge whether the load rate of the electronically controlled engine has changed, and when it is judged that the change has occurred, calculate according to the obtained current torque of the electronically controlled engine and the preset algorithm model to obtain the current torque surplus of the electronically controlled engine, and judge whether the torque surplus meets the preset torque surplus condition; when it is judged that the preset torque surplus condition is not met, the torque surplus is input into the preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, and the target relationship curve is used to determine the output power matching the torque of the current electronically controlled engine, which is beneficial to improve the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing fuel consumption and saving costs.

[0154] Embodiment 3

[0155] See also Figure 3 , Figure 3 1 is a schematic diagram of the structure of an electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention. Figure 3 The electronically controlled engine control device based on a hydraulic excavator described above can execute the electronically controlled engine control method of a hydraulic excavator, and the control device can be applied to the central electronic control system of the hydraulic excavator. The electronically controlled engine can be used to drive the hydraulic device (e.g., hydraulic pump) of the hydraulic excavator to work, which is not limited in the embodiments of the present invention. Figure 3 As shown, the electronically controlled engine control device based on the hydraulic excavator may include: a judgment module 301 and a calculation module 302, wherein:

[0156] The judging module 301 is used to judge whether the load rate of the electronically controlled engine changes when the hydraulic excavator is in working state;

[0157] The calculation module 302 is used to calculate the current torque margin of the electronically controlled engine according to the acquired torque of the current electronically controlled engine and a preset algorithm model when the judgment module 301 judges that the load power of the electronically controlled engine has changed.

[0158] The judgment module 301 is further used to judge whether the torque margin satisfies a preset torque margin condition.

[0159] The calculation module 302 is also used to input the torque surplus into the preset torque surplus calculation model for calculation when the judgment module 301 determines that the torque surplus does not meet the preset torque surplus condition, so as to obtain a target relationship curve matching the torque surplus. The target relationship curve is used to determine the output power matching the torque of the current electronically controlled engine.

[0160] It can be seen that implementation Figure 3 The described electronic engine control device based on a hydraulic excavator can determine whether the load rate of the electronic engine has changed when the hydraulic excavator is in a working state. When it is determined that a change has occurred, the current torque surplus of the electronic engine is calculated based on the acquired torque of the current electronic engine and a preset algorithm model to obtain the current torque surplus of the electronic engine, and determine whether the torque surplus meets the preset torque surplus condition. When it is determined that the preset torque surplus condition is not met, the torque surplus is input into the preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus. The target relationship curve is used to determine the optimal output power matching the torque of the current electronic engine, and to perform intelligent control of the electronic engine, which is beneficial to improving the working efficiency of the electronic engine and the accuracy of its speed control, while reducing fuel consumption and saving costs.

[0161] In an optional embodiment, if Figure 4 As shown, the device also includes:

[0162] The determination module 303 is used to determine that the control mode of the electronically controlled engine is fixed throttle speed regulation when the judgment module 301 determines that the torque margin meets the preset torque margin condition, and determine the output power that matches the torque margin of the electronically controlled engine; determine the target output power corresponding to the hydraulic device in the hydraulic excavator that matches the output power.

[0163] The regulating module 304 is used to regulate the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the determining module 303 .

[0164] It can be seen that implementation Figure 4 The described electronic engine control device based on a hydraulic excavator can, when it is judged that the torque surplus meets the preset torque surplus condition, determine the control method of the electronic engine of the hydraulic excavator as fixed throttle speed regulation, and determine the output power that matches the torque surplus of the electronic engine, which is conducive to enriching the hydraulic excavator's diversified control methods for the electronic engine and the accuracy of its speed control.

[0165] In another optional embodiment, Figure 4 As shown, the calculation module 302 performs calculation according to the acquired current torque of the electronically controlled engine and the preset algorithm model, and obtains the current torque margin of the electronically controlled engine in a specific manner as follows:

[0166] The current theoretical output power of the electronically controlled engine is calculated based on the acquired current torque and angular velocity of the electronically controlled engine.

[0167] The actual output power of the electronically controlled engine is calculated based on the theoretical output power and the preset rotational power loss of the electronically controlled engine.

[0168] Among them, the calculation formula of theoretical output power and actual output power is:

[0169] W 理论 =Tω

[0170] W 实际 =W 理论 -W 损耗

[0171] W 理论 is represented by the theoretical output power, T is represented by the current torque of the electronically controlled engine, ω is represented by the current angular velocity of the electronically controlled engine, and W is represented by the current angular velocity of the electronically controlled engine. 实际 Expressed as actual output power, W 损耗 Indicates the rotating power loss preset for the electronically controlled engine.

[0172] The current torque margin of the electronically controlled engine is calculated based on the actual output power and the preset algorithm model.

[0173] The calculation formula of the algorithm model is:

[0174]

[0175] Where I represents the current torque surplus of the electronically controlled engine, W 额定 Expressed as the rated output power of the electronically controlled engine.

[0176] It can be seen that implementation Figure 4 The described electronic engine control device based on a hydraulic excavator can calculate based on the acquired current torque of the electronic engine and a preset algorithm model to obtain the current torque surplus of the electronic engine, so as to subsequently calculate a target relationship curve matching the torque surplus, thereby helping to improve the working efficiency of the electronic engine and the accuracy of the hydraulic excavator's speed control, reduce fuel consumption and save costs.

[0177] In yet another optional embodiment, Figure 4 As shown, the device also includes:

[0178] The matching module 305 is used to match the target relationship curve calculated by the calculation module 302 with a preset specific fuel consumption curve area, and determine an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area.

[0179] The determination module 303 is further used to determine the optimal output power that matches the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area matched by the matching module 305 .

[0180] The preset specific fuel consumption curve regions include: a first specific fuel consumption curve region, a second specific fuel consumption curve region, a third specific fuel consumption curve region and a fourth specific fuel consumption curve region.

[0181] It can be seen that implementation Figure 4 The described electronic engine control device based on a hydraulic excavator can match the target relationship curve with a preset specific fuel consumption curve area, and determine the optimal fuel consumption curve area where the target relationship curve coincides with the optimal specific fuel consumption curve area, thereby determining the optimal output power that matches the current torque and speed of the electronic engine based on the optimal fuel consumption curve area, which is beneficial to reducing the fuel consumption of the electronic engine and saving costs.

[0182] In yet another optional embodiment, the target relationship curve is represented by a relationship curve between torque and speed corresponding to the electronically controlled engine.

[0183] As well as Figure 4 As shown, when the judgment module 301 judges that the torque surplus does not meet the preset torque surplus condition, the calculation module 302 inputs the torque surplus into the preset torque surplus calculation model for calculation, and the specific method of obtaining the target relationship curve matching the torque surplus is:

[0184] When it is determined that the torque surplus is less than or equal to a preset surplus threshold, the torque surplus is input into a preset torque surplus calculation model for calculation.

[0185] When the torque margin is a first threshold, a first relationship curve matching the torque margin is calculated by the torque margin calculation model.

[0186] When the torque margin is the second threshold, a second relationship curve matching the torque margin is calculated by the torque margin calculation model.

[0187] When the torque margin is the third threshold, a third relationship curve matching the torque margin is calculated by the torque margin calculation model.

[0188] It can be seen that implementation Figure 4 The described electronically controlled engine control device based on a hydraulic excavator can input the torque surplus into a preset torque surplus calculation model for calculation, and obtain a target relationship curve matching the torque surplus, so as to subsequently use the target relationship curve to determine the optimal output power matching the torque of the current electronically controlled engine, which is beneficial to improving the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing the fuel consumption of the hydraulic excavator and saving costs.

[0189] In yet another optional embodiment, Figure 4 As shown, the matching module 305 matches the target relationship curve with the preset specific fuel consumption curve area, and determines the optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area in the following specific manner:

[0190] The hydraulic excavator matches the target relationship curve with the preset specific fuel consumption curve area.

[0191] When the target relationship curve is the first relationship curve, a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0192] When the target relationship curve is the second relationship curve, a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0193] When the target relationship curve is the third relationship curve, a curve region where the target relationship curve overlaps with the third specific fuel consumption curve region is determined as the optimal fuel consumption curve region.

[0194] It can be seen that implementation Figure 4 The described electronic engine control device based on a hydraulic excavator can match the target relationship curve with a preset specific fuel consumption curve area, and determine the optimal fuel consumption curve area where the target relationship curve coincides with the optimal specific fuel consumption curve area, thereby determining the optimal output power that matches the current torque and speed of the electronic engine based on the optimal fuel consumption curve area, which is beneficial to reducing the fuel consumption of the electronic engine and saving costs.

[0195] In yet another optional embodiment, Figure 4 As shown, the determination module 303 is also used to determine the target output power corresponding to the hydraulic device in the hydraulic excavator that matches the optimal output power.

[0196] The regulating module 304 is further configured to regulate the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the determining module 303 .

[0197] And, the specific fuel consumption curve area is determined as follows:

[0198] The hydraulic excavator obtains a real-time fuel consumption value set corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determines a specific fuel consumption curve corresponding to each torque and speed based on the real-time fuel consumption value set.

[0199] It can be seen that implementation Figure 4 The described electronic engine control device based on a hydraulic excavator can determine the target output power corresponding to the hydraulic device matching the optimal output power after the hydraulic excavator determines the optimal output power matching the current torque and speed of the electronic engine according to the optimal fuel consumption curve area, and adjust the current of the hydraulic device in the hydraulic excavator according to the target output power, which is beneficial to improving the working efficiency of the electronic engine and the accuracy of the hydraulic excavator's speed control, while reducing the fuel consumption of the hydraulic excavator and saving costs.

[0200] Embodiment 4

[0201] See also Figure 5 , Figure 5 1 is a schematic diagram of the structure of another electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention. Figure 5The electronically controlled engine control device based on a hydraulic excavator described above can execute the electronically controlled engine control method of a hydraulic excavator, and the control device can be applied to the central electronic control system of the hydraulic excavator. The electronically controlled engine can be used to drive the hydraulic device (e.g., hydraulic pump) of the hydraulic excavator to work, which is not limited in the embodiments of the present invention. Figure 5 As shown, the electronically controlled engine control device based on the hydraulic excavator may include:

[0202] A memory 401 storing executable program codes;

[0203] a processor 402 coupled to the memory 401;

[0204] The processor 402 calls the executable program code stored in the memory 401 to execute the steps of the electronically controlled engine control method based on a hydraulic excavator described in the first embodiment of the present invention or the second embodiment of the present invention.

[0205] Embodiment 5

[0206] An embodiment of the present invention discloses a computer storage medium storing computer instructions. When the computer instructions are called, they are used to execute the steps of the electronic engine control method based on a hydraulic excavator described in Embodiment 1 or Embodiment 2 of the present invention.

[0207] Embodiment 6

[0208] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute the steps in the electronic engine control method based on a hydraulic excavator described in Example 1 or Example 2.

[0209] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0210] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, a magnetic disk storage, a magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0211] Finally, it should be noted that the electronic engine control method and device based on a hydraulic excavator disclosed in the embodiment of the present invention discloses only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

[0212] When it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation, obtains a target relationship curve matching the torque surplus, matches the target relationship curve with the preset specific fuel consumption curve area, determines the optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area, and determines the optimal output power matching the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve area.

Claims

1. A method for controlling an electronically controlled engine based on a hydraulic excavator, applied to a hydraulic excavator, wherein the hydraulic excavator at least comprises an electronically controlled engine, characterized in that: The method comprises: When the hydraulic excavator is in a working state, the hydraulic excavator determines whether the load rate of the electronically controlled engine changes; When it is determined that the load rate of the electronically controlled engine has changed, the hydraulic excavator calculates according to the acquired current torque of the electronically controlled engine and a preset algorithm model to obtain the current torque surplus of the electronically controlled engine, and determines whether the torque surplus satisfies a preset torque surplus condition; When it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into the preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, and the target relationship curve is used to determine the optimal output power matching the current torque of the electronically controlled engine.

2. The electronically controlled engine control method based on a hydraulic excavator according to claim 1, characterized in that: The method further comprises: When it is determined that the torque surplus meets the preset torque surplus condition, the hydraulic excavator determines that the control mode of the electronically controlled engine is fixed throttle speed regulation, and determines the output power matching the torque surplus of the electronically controlled engine; The hydraulic excavator determines a target output power corresponding to a hydraulic device in the hydraulic excavator that matches the output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power.

3. The electronically controlled engine control method based on a hydraulic excavator according to claim 1, characterized in that: The hydraulic excavator calculates the current torque margin of the electronically controlled engine according to the acquired current torque of the electronically controlled engine and a preset algorithm model, including: The hydraulic excavator calculates the current theoretical output power of the electronically controlled engine according to the acquired current torque and angular velocity of the electronically controlled engine; The hydraulic excavator calculates the actual output power of the electronically controlled engine according to the theoretical output power and the preset rotational loss power of the electronically controlled engine; The calculation formula of the theoretical output power and the actual output power is: W 理论 =Tω IN 实际 =In 理论 -IN 损耗 The W 理论 is represented by the theoretical output power, T is represented by the current torque of the electronically controlled engine obtained, ω is represented by the current angular velocity of the electronically controlled engine obtained, and W 实际 Expressed as the actual output power, the W 损耗 Indicates the preset rotating parts loss power for the electronically controlled engine; The hydraulic excavator calculates according to the actual output power and a preset algorithm model to obtain the current torque margin of the electronically controlled engine; The calculation formula of the algorithm model is: Wherein, I represents the current torque margin of the electronically controlled engine, and W 额定 It is expressed as the rated output power of the electronically controlled engine.

4. The electronically controlled engine control method based on a hydraulic excavator according to claim 2, characterized in that: The method further comprises: The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area to determine an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area; The hydraulic excavator determines the optimal output power matching the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area; The preset specific fuel consumption curve regions include: a first specific fuel consumption curve region, a second specific fuel consumption curve region, a third specific fuel consumption curve region and a fourth specific fuel consumption curve region.

5. The electronically controlled engine control method based on a hydraulic excavator according to claim 4, characterized in that: The target relationship curve is represented by a relationship curve between torque and speed corresponding to the electronically controlled engine; When it is determined that the torque surplus does not meet the preset torque surplus condition, the hydraulic excavator inputs the torque surplus into a preset torque surplus calculation model for calculation to obtain a target relationship curve matching the torque surplus, including: When it is determined that the torque surplus is less than or equal to a preset surplus threshold, the hydraulic excavator inputs the torque surplus into a preset torque surplus calculation model for calculation; When the torque margin is a first threshold, the hydraulic excavator calculates a first relationship curve matching the torque margin through the torque margin calculation model; When the torque margin is a second threshold, the hydraulic excavator calculates a second relationship curve matching the torque margin through the torque margin calculation model; When the torque margin is a third threshold, the hydraulic excavator calculates a third relationship curve matching the torque margin through the torque margin calculation model.

6. The electronically controlled engine control method based on a hydraulic excavator according to claim 5, characterized in that: The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area, and determines an optimal fuel consumption curve area where the target relationship curve overlaps with the optimal specific fuel consumption curve area, including: The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve area; When the target relationship curve is the first relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region; When the target relationship curve is the second relationship curve, determining a curve region where the target relationship curve overlaps with the second specific fuel consumption curve region as an optimal fuel consumption curve region; When the target relationship curve is the third relationship curve, a curve region where the target relationship curve overlaps with the third specific fuel consumption curve region is determined as an optimal fuel consumption curve region.

7. The electronically controlled engine control method based on a hydraulic excavator according to claim 5, characterized in that: After the hydraulic excavator determines the optimal output power matching the current torque and speed of the electronically controlled engine according to the optimal fuel consumption curve area, the method further includes: The hydraulic excavator determines a target output power corresponding to the hydraulic device in the hydraulic excavator that matches the optimal output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power; And, the specific fuel consumption curve area is determined as follows: The hydraulic excavator obtains a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in a working state in the past, and determines the specific fuel consumption curve area corresponding to each torque and speed based on the real-time fuel consumption value set.

8. An electronically controlled engine control device based on a hydraulic excavator, applied to a hydraulic excavator, wherein the hydraulic excavator at least comprises an electronically controlled engine, characterized in that: The device comprises: A judging module, used for judging whether the load rate of the electronically controlled engine changes when the hydraulic excavator is in working state; a calculation module, configured to obtain the current torque margin of the electronically controlled engine by performing calculation according to the acquired current torque of the electronically controlled engine and a preset algorithm model when the judgment module judges that the load power of the electronically controlled engine changes; The judging module is further used to judge whether the torque margin satisfies a preset torque margin condition; The calculation module is also used to input the torque surplus into a preset torque surplus calculation model for calculation when the judgment module determines that the torque surplus does not meet the preset torque surplus condition, so as to obtain a target relationship curve matching the torque surplus. The target relationship curve is used to determine the optimal output power matching the current torque of the electronically controlled engine.

9. An electronically controlled engine control device based on a hydraulic excavator, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the electronic engine control method based on a hydraulic excavator as described in any one of claims 1-7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the electronic engine control method based on a hydraulic excavator as described in any one of claims 1-7.

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