Hydraulic excavator-based electronically controlled engine control method and device

Abstract

The application discloses a kind of based on hydraulic excavator's electric control engine control method and device, the method includes: when hydraulic excavator is in working condition, hydraulic excavator judges whether the load rate of electric control engine changes, when judging to change, according to the torque of current electric control engine obtained and preset algorithm model are calculated, obtain the torque surplus degree of current electric control engine, and judge whether torque surplus degree satisfies preset torque surplus degree condition, when judging to torque surplus degree does not satisfy preset torque surplus degree condition, torque surplus degree is input to preset torque surplus degree calculation model and is calculated, obtain the target relationship curve matched with torque surplus degree, the curve is used to determine the optimal output power matched with the torque of current electric control engine.It can be seen that the application can intelligently control electric control engine, which is conducive to improving the working efficiency of electric control engine while reducing fuel consumption and saving cost.

Description

Technical Field

[0001] This invention relates to the field of excavator technology, and in particular to an electronic engine control method and device for hydraulic excavators. Background Technology

[0002] With the increasing demand for improved engine lifespan and reduced fuel consumption in hydraulic excavators in recent years, most current engines are controlled using speed control methods such as constant speed control rate, constant throttle control rate, and constant throttle control with multiple rate adjustments. These speed and power control methods are relatively simple and adaptable to ordinary working conditions, but they are poorly adaptable to special working conditions. They are unable to fully utilize the engine's optimal fuel-efficient range and cannot simultaneously achieve the advantages of low speed drop and low fuel consumption. The aforementioned speed control and power matching energy-saving control methods are insufficient to meet market needs.

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

[0005] To address the aforementioned technical problems, the first aspect of this invention discloses an electronically controlled engine control method for a hydraulic excavator, the method comprising:

[0006] When the hydraulic excavator is in operation, the hydraulic excavator determines whether the load rate of the electronically controlled engine has changed;

[0007] When it is determined that the load rate of the electronically controlled engine changes, the hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and the preset algorithm model, and determines whether the torque margin meets the preset torque margin condition.

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

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

[0010] When it is determined that the torque margin meets the preset torque margin condition, the hydraulic excavator determines that the control mode of the electronically controlled engine is constant throttle speed regulation, and determines the output power that matches the torque margin of the electronically controlled engine.

[0011] The hydraulic excavator determines the target output power corresponding to the hydraulic device inside the hydraulic excavator that matches the output power, and adjusts the current of the hydraulic device inside 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 the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and a preset algorithm model, including:

[0013] The hydraulic excavator calculates the current theoretical output power of the electronically controlled engine based on the obtained current torque and angular velocity of the electronically controlled engine;

[0014] The hydraulic excavator calculates the actual output power of the electronically controlled engine based on the theoretical output power and the preset component loss power of the electronically controlled engine.

[0015] The formulas for calculating the theoretical output power and the actual output power are as follows:

[0016] W 理论 =Tω

[0017] W 实际 =W 理论 -W 损耗

[0018] The W 理论 The theoretical output power is represented by T, the current torque of the electronically controlled engine is represented by ω, and the current angular velocity of the electronically controlled engine is represented by W. 实际 The W represents the actual output power. 损耗 This represents the preset component loss power of the electronically controlled engine;

[0019] The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the actual output power and a preset algorithm model.

[0020] The calculation formula for the algorithm model is as follows:

[0021]

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

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

[0024] The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region.

[0025] 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 region.

[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 as the relationship curve between the torque and the speed of the electronically controlled engine;

[0028] When it is determined that the torque margin does not meet the preset torque margin condition, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation, and obtains a target relationship curve that matches the torque margin, including:

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

[0030] When the torque margin is at a first threshold, the hydraulic excavator calculates a first relationship curve that matches the torque margin using the torque margin calculation model.

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

[0032] When the torque margin is the third threshold, the hydraulic excavator calculates a third relationship curve that matches 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 region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, including:

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

[0035] When the target relationship curve is the first relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region;

[0036] When the target relationship curve is the second relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region;

[0037] When the target relationship curve is the third relationship curve, the curve region where the target relationship curve and the third specific fuel consumption curve region coincide is determined as the optimal fuel consumption curve region.

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

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

[0040] Furthermore, the method for determining the specific fuel consumption curve region is as follows:

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

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

[0043] The judgment module is used to determine whether the load rate of the electronically controlled engine has changed when the hydraulic excavator is in operation.

[0044] The calculation module is used to calculate the current torque margin of the electronically controlled engine based on the current torque of the electronically controlled engine and a preset algorithm model when the judgment module determines that the load power of the electronically controlled engine has changed.

[0045] The judgment module is also used to determine whether the torque margin meets the preset torque margin condition.

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

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

[0048] The determination module is used to determine that when the judgment module determines that the torque margin meets the preset torque margin condition, the control mode of the electronically controlled engine is constant throttle speed regulation, and to determine the output power that matches the torque margin of the electronically controlled engine; and to determine the target output power corresponding to the hydraulic device in the hydraulic excavator that matches the output power.

[0049] An adjustment module is used to adjust 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 calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and a preset algorithm model, specifically in the following way:

[0051] The theoretical output power of the electronically controlled engine is calculated based on the obtained 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 component loss power of the electronically controlled engine.

[0053] The formulas for calculating the theoretical output power and the actual output power are as follows:

[0054] W 理论 =Tω

[0055] W 实际 =W 理论 -W 损耗

[0056] The W 理论 The theoretical output power is represented by T, the current torque of the electronically controlled engine is represented by ω, and the current angular velocity of the electronically controlled engine is represented by W. 实际The W represents the actual output power. 损耗 This represents the preset component loss power of the electronically controlled engine;

[0057] The current torque margin of the electronically controlled engine is calculated based on the actual output power and the preset algorithm model.

[0058] The calculation formula for the algorithm model is as follows:

[0059]

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

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

[0062] The matching module is used to match the target relationship curve calculated by the calculation module with a preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region.

[0063] The determining module is further configured to determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve region obtained 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 a second aspect of the present invention, the target relationship curve is represented as the relationship curve between the torque and the speed of the electronically controlled engine;

[0066] When the judgment module determines that the torque margin does not meet the preset torque margin condition, the calculation module inputs the torque margin into the preset torque margin calculation model for calculation, and obtains the target relationship curve that matches the torque margin in the following specific way:

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

[0068] When the torque margin is at a first threshold, a first relationship curve matching the torque margin is calculated using the torque margin calculation model.

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

[0070] When the torque margin is the 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 region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region. The specific method for this is as follows:

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

[0073] When the target relationship curve is the first relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region;

[0074] When the target relationship curve is the second relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region;

[0075] When the target relationship curve is the third relationship curve, the curve region where the target relationship curve and the third specific fuel consumption curve region coincide is determined as the optimal fuel consumption curve region.

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

[0077] The adjustment module is also used to adjust the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the determining module;

[0078] Furthermore, the method for determining the specific fuel consumption curve region is as follows:

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

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

[0081] Memory containing 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 for hydraulic excavators disclosed in the first aspect of the present invention.

[0084] The fourth aspect of the present invention discloses a computer storage medium storing computer instructions, which, when invoked, are used to execute the electronically controlled engine control method for 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] This invention provides a method for controlling an electronically controlled engine in a hydraulic excavator. The method includes: when the hydraulic excavator is in operation, determining whether the load rate of the electronically controlled engine has changed; if a change in load rate is detected, the hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque and a preset algorithm model, to obtain the current torque margin of the engine. This torque margin is then used to determine the output power of the engine, improving the control accuracy. The method further involves determining whether the torque margin meets a preset torque margin condition; if the torque margin does not meet the preset condition, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model to obtain a target relationship curve matching the torque margin. This target relationship curve is used to determine the optimal output power matching the current torque of the electronically controlled engine. Therefore, implementing this invention enables intelligent control of the electronically controlled engine based on the relationship between its speed and power, thereby improving the engine's working efficiency and the accuracy of speed control by the hydraulic excavator, while reducing fuel consumption and saving costs. Attached Figure Description

[0087] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0088] Figure 1 This is a flowchart illustrating an electronic engine control method for a hydraulic excavator disclosed in an embodiment of the present invention.

[0089] Figure 2This is a flowchart illustrating another electronic engine control method for a hydraulic excavator disclosed in an embodiment of the present invention.

[0090] Figure 3 This is a schematic diagram of the structure of an electronically controlled engine control device based on a hydraulic excavator, as disclosed in an embodiment of the present invention.

[0091] Figure 4 This is a 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 This 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;

[0093] Figure 6 This is a curve showing the relationship between torque and speed of an electronically controlled engine disclosed in an embodiment of the present invention. Detailed Implementation

[0094] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0095] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

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

[0097] This invention discloses a method and device for controlling an electronically controlled engine in a hydraulic excavator. When the hydraulic excavator is in operation, it determines whether the load rate of the electronically controlled engine has changed. If a change is detected, it calculates the current torque margin of the electronically controlled engine based on the acquired torque and a preset algorithm model. It then determines whether the torque margin meets a preset torque margin condition. If the preset condition is not met, the torque margin is input into a preset torque margin calculation model for further calculation, resulting in a target relationship curve that matches the torque margin. This target relationship curve is used to determine the optimal output power that matches the current torque of the electronically controlled engine, enabling intelligent control of the engine. This improves the engine's working efficiency and speed control accuracy while reducing fuel consumption and saving costs. Detailed explanations follow.

[0098] Example 1

[0099] Please see Figure 1 , Figure 1 This is a flowchart illustrating an electronically controlled engine control method for a hydraulic excavator, as disclosed in an embodiment of the present invention. Wherein, Figure 1 The described electronically controlled engine control method for hydraulic excavators can be applied to the electronically controlled engine control device of a hydraulic excavator, and this 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. This invention is not limited in its embodiments. Figure 1 As shown, the electronic engine control method based on a hydraulic excavator may include the following operations:

[0100] 101. When the hydraulic excavator is in operation, 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 in step 102 can be executed.

[0101] In an 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 operation, it can determine whether the load rate of the electronically controlled engine has changed, and adjust its power and speed control in different ways according to the load rate change. This helps to improve the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, thereby reducing fuel consumption and saving costs.

[0103] 102. The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and the preset algorithm model.

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

[0105] In this embodiment of the invention, the hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and a preset algorithm model, which may include:

[0106] The hydraulic excavator calculates the 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 component loss power of the electronically controlled engine.

[0108] The formulas for calculating theoretical output power and actual output power are as follows:

[0109]

[0110] W 理论 =Tω

[0111] W 实际 =W 理论 -W 损耗

[0112] W 理论 The output power is expressed as theoretical power, T represents the current torque of the electronically controlled engine, ω represents the current angular velocity of the electronically controlled engine (in radians per second), n represents the current speed of the electronically controlled engine (in revolutions per minute), and W... 实际 Expressed as actual output power, W 损耗 This represents the preset component loss power of the electronically controlled engine, in W. 损耗 It can be calculated by analyzing the engine torque lost due to friction or wear during engine operation.

[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 for the algorithm model is:

[0115]

[0116] Where I represents the current torque margin of the electronically controlled engine, and W 额定This represents 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 obtained torque and the preset algorithm model. This allows for the subsequent calculation of a target relationship curve that matches the torque margin, thereby 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 meets the preset torque margin condition. When it is determined that the torque margin does not meet the preset torque margin condition, the operation of step 104 can be performed.

[0119] In this embodiment of the invention, optionally, the preset redundancy threshold can be 0.7 or 0.8, and this embodiment of the invention does not limit it.

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

[0121] Determine the target output power of the hydraulic device inside the hydraulic excavator that matches the output power, and adjust the current of the hydraulic device inside the hydraulic excavator according to the target output power.

[0122] When the torque margin is determined to meet the preset torque margin condition, the hydraulic excavator determines the control mode of the electronically controlled engine to be constant throttle speed regulation, and determines the output power that matches the torque margin of the electronically controlled engine. This helps to enrich the hydraulic excavator's diverse control methods for the electronically controlled engine and improve the accuracy of its speed control. Alternatively, when the torque margin is determined not to meet the preset torque margin condition, a target relationship curve that matches the torque margin is calculated based on the torque margin. This helps to improve 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 margin into the preset torque margin calculation model for calculation, and obtains the target relationship curve that matches the torque margin.

[0124] In embodiments of the present invention, optionally, such as Figure 6 As shown, the vertical axis represents the torque of the electronically controlled engine, the horizontal axis represents the speed of the electronically controlled engine, and the target relationship curve represents the relationship curve between the torque and speed of the electronically controlled engine. The target relationship curve is used to determine the optimal output power that matches the current torque of the electronically controlled engine.

[0125] In this embodiment of the invention, when it is determined that the torque margin does not meet the preset torque margin condition, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation, and obtains a target relationship curve that matches the torque margin, which may include:

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

[0127] When the torque margin is at a first threshold (e.g., 0.5), the hydraulic excavator calculates a first relationship curve that matches the torque margin using a torque margin calculation model (e.g., ...). Figure 6 As shown, x1).

[0128] When the torque margin is at the second threshold (e.g., 0.6), the hydraulic excavator calculates a second relationship curve that matches the torque margin using the torque margin calculation model (e.g., ...). Figure 6 As shown, x2).

[0129] When the torque margin is at the third threshold (e.g., 0.7), the hydraulic excavator calculates a third relationship curve that matches the torque margin using the torque margin calculation model (e.g., ...). Figure 6 As shown, x3).

[0130] In this way, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation, and obtains a target relationship curve that matches the torque margin. This target relationship curve is then used to determine the optimal output power that matches the torque of the current electronically controlled engine. This helps to improve the working efficiency of the electronically controlled engine and the accuracy of the hydraulic excavator's speed control, while reducing the hydraulic excavator's fuel consumption and saving costs.

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

[0132] The hydraulic excavator matches the target relationship curve with the preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region.

[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 region.

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

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

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

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

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

[0139] When the target relationship curve is the third relationship curve, the curve region where the target relationship curve and the third specific fuel consumption curve region coincide 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 based on the optimal fuel consumption curve region, the method further includes the following operations:

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

[0142] As can be seen, this optional embodiment can match the target relationship curve with a preset specific fuel consumption curve region, determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, and thus determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve region, which is beneficial to reduce the fuel consumption of the electronically controlled engine and save 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 region, it determines the target output power corresponding to the hydraulic device that matches the optimal output power, and adjusts the current of the hydraulic device in the hydraulic excavator according to the target output power, 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 the fuel consumption of the hydraulic excavator and saving costs.

[0143] Example 2

[0144] Please see Figure 2 , Figure 2 This is a flowchart illustrating an electronically controlled engine control method for a hydraulic excavator, as disclosed in an embodiment of the present invention. Wherein, Figure 2 The described electronically controlled engine control method for hydraulic excavators can be applied to the electronically controlled engine control device of a hydraulic excavator, and this 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. This invention is not limited in its embodiments. Figure 2 As shown, the electronic engine control method based on a hydraulic excavator may include the following operations:

[0145] 201. When the hydraulic excavator is in working condition, the hydraulic excavator acquires the real-time fuel consumption data set corresponding to each torque and speed collected when the electronically controlled engine was in working condition in real time, and determines the specific fuel consumption curve region corresponding to each torque and speed based on the real-time fuel consumption data 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 in step 203 can be executed.

[0147] 203. The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and the preset algorithm model.

[0148] 204. Determine whether the torque margin meets the preset torque margin condition. If the torque margin does not meet the preset torque margin condition, step 205 can be executed.

[0149] 205. The hydraulic excavator inputs the torque margin into the preset torque margin calculation model for calculation, and obtains the target relationship curve that matches the torque margin.

[0150] 206. The hydraulic excavator matches the target relationship curve with the preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, 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 region.

[0151] In this embodiment of the invention, for other descriptions of steps 202-206, please refer to the detailed description of steps 101-104 in Embodiment 1. This embodiment of the invention will not repeat them.

[0152] As can be seen, implementing the embodiments of the present invention enables the hydraulic excavator to acquire, 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 operation, and to determine the specific fuel consumption curve region corresponding to each torque and speed based on the set of real-time fuel consumption values. This allows the optimal output power that matches the current torque and speed of the electronically controlled engine to be determined based on the determined optimal fuel consumption curve region. This helps 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 is evident that implementation Figure 2 The described electronic engine control method for hydraulic excavators enables the excavator to acquire real-time fuel consumption data sets corresponding to various torque and speed parameters collected during past operating conditions. Based on these data sets, a specific fuel consumption curve region corresponding to each torque and speed is determined. This allows for the subsequent determination of the optimal output power matching the current torque and speed of the electronic engine. The method also detects changes in the load rate of the electronic engine. When a change is detected, the current torque of the electronic engine is calculated using a preset algorithm model to determine its current torque margin. The method then checks if the torque margin meets preset conditions. If it does not, the torque margin is input into a preset torque margin calculation model to obtain a target relationship curve matching the torque margin. This target relationship curve is used to determine the output power matching the current torque of the electronic engine. This improves the working efficiency of the electronic engine and the accuracy of the hydraulic excavator's speed control, while simultaneously reducing fuel consumption and saving costs.

[0154] Example 3

[0155] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronically controlled engine control device based on a hydraulic excavator, as disclosed in an embodiment of the present invention. Figure 3 The described electronically controlled engine control device for a hydraulic excavator can execute the aforementioned electronically controlled engine control method for a hydraulic excavator, and this control device can be applied to the central electronic control system of a hydraulic excavator. The electronically controlled engine can be used to drive the hydraulic devices (e.g., hydraulic pumps) of the hydraulic excavator. This invention is not limited in its embodiments. Figure 3 As shown, the electronically controlled engine control device based on a hydraulic excavator may include: a judgment module 301 and a calculation module 302, wherein:

[0156] The judgment module 301 is used to determine whether the load rate of the electronically controlled engine has changed when the hydraulic excavator is in operation.

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

[0158] The judgment module 301 is also used to determine whether the torque margin meets the preset torque margin conditions.

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

[0160] It is evident that implementation Figure 3 The described electronically controlled engine control device for hydraulic excavators can determine whether the load rate of the electronically controlled engine has changed when the hydraulic excavator is in operation. When a change is detected, it calculates the current torque margin of the electronically controlled engine based on the obtained torque and a preset algorithm model. It then determines whether the torque margin meets the preset torque margin conditions. If the preset torque margin conditions are not met, the torque margin is input into the preset torque margin calculation model for calculation, resulting in a target relationship curve that matches the torque margin. This target relationship curve is used to determine the optimal output power that matches the current torque of the electronically controlled engine, enabling intelligent control of the electronically controlled engine. This, in turn, helps improve the working efficiency and speed control accuracy of the electronically controlled engine while reducing fuel consumption and saving costs.

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

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

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

[0164] It is evident that implementation Figure 4 The described electronic engine control device for hydraulic excavators can determine the control mode of the electronic engine as constant throttle speed regulation when it is determined that the torque margin meets the preset torque margin conditions. It also determines the output power that matches the torque margin of the electronic engine, which is beneficial to enriching the hydraulic excavator's diversified control modes for the electronic engine and improving the accuracy of its speed control.

[0165] In another alternative embodiment, such as Figure 4 As shown, the calculation module 302 calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and the preset algorithm model. The specific method for obtaining the current torque margin of the electronically controlled engine is as follows:

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

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

[0168] The formulas for calculating theoretical output power and actual output power are as follows:

[0169] W 理论 =Tω

[0170] W 实际 =W 理论 -W 损耗

[0171] W 理论 The output power is represented by T, the current torque of the electronically controlled engine is obtained, ω is the current angular velocity of the electronically controlled engine is obtained, and W is the theoretical output power. 实际 Expressed as actual output power, W 损耗 This represents the preset power loss of rotating components in 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 for the algorithm model is:

[0174]

[0175] Where I represents the current torque margin of the electronically controlled engine, and W 额定 This represents the rated output power of the electronically controlled engine.

[0176] It is evident that implementation Figure 4 The described electronically controlled engine control device based on a hydraulic excavator can calculate the current torque margin of the electronically controlled engine based on the current torque of the engine and a preset algorithm model. This allows for the subsequent calculation of a target relationship curve that matches the torque margin, thereby 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.

[0177] In yet another alternative embodiment, such as 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 the preset specific fuel consumption curve region, and determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region.

[0179] The determining module 303 is also used to determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve region obtained by the matching module 305.

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

[0181] It is evident that implementation Figure 4 The described electronically controlled engine control device based on a hydraulic excavator can match the target relationship curve with a preset specific fuel consumption curve region, determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, and thus determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve region, which is beneficial to reduce the fuel consumption of the electronically controlled engine and save costs.

[0182] In yet another alternative embodiment, the target relationship curve is represented as the torque versus speed curve of the electronically controlled engine.

[0183] And such as Figure 4 As shown, when the judgment module 301 determines that the torque margin does not meet the preset torque margin condition, the calculation module 302 inputs the torque margin into the preset torque margin calculation model for calculation, and obtains the target relationship curve that matches the torque margin in the following specific way:

[0184] When the torque margin is determined to be less than or equal to the preset margin threshold, the torque margin is input into the preset torque margin calculation model for calculation.

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

[0186] When the torque margin is at 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 at the third threshold, the third relationship curve that matches the torque margin is calculated by the torque margin calculation model.

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

[0189] In yet another alternative embodiment, such as Figure 4 As shown, the matching module 305 matches the target relationship curve with a preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region. The specific method for this is as follows:

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

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

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

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

[0194] It is evident that implementation Figure 4 The described electronically controlled engine control device based on a hydraulic excavator can match the target relationship curve with a preset specific fuel consumption curve region, determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, and thus determine the optimal output power that matches the current torque and speed of the electronically controlled engine based on the optimal fuel consumption curve region, which is beneficial to reduce the fuel consumption of the electronically controlled engine and save costs.

[0195] In yet another alternative embodiment, such as Figure 4 As shown, the determining module 303 is also used to determine the target output power corresponding to the hydraulic device inside the hydraulic excavator that matches the optimal output power.

[0196] The adjustment module 304 is also used to adjust the current of the hydraulic device in the hydraulic excavator according to the target output power determined by the determination module 303.

[0197] And, the method for determining the specific fuel consumption curve region is as follows:

[0198] The hydraulic excavator acquires a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in operation, and determines the specific fuel consumption curve corresponding to each torque and speed based on the set of real-time fuel consumption values.

[0199] It is evident that implementation Figure 4 The described electronic engine control device for hydraulic excavators can determine the optimal output power that matches the current torque and speed of the electronic engine based on the optimal fuel consumption curve region, determine the target output power of 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. This helps to improve the working efficiency of the electronic engine and the accuracy of the hydraulic excavator's speed control, while reducing the hydraulic excavator's fuel consumption and saving costs.

[0200] Example 4

[0201] Please see Figure 5 , Figure 5 This is a schematic diagram of another electronically controlled engine control device based on a hydraulic excavator disclosed in an embodiment of the present invention. Wherein, Figure 5The described electronically controlled engine control device for a hydraulic excavator can execute the aforementioned electronically controlled engine control method for a hydraulic excavator, and this control device can be applied to the central electronic control system of a hydraulic excavator. The electronically controlled engine can be used to drive the hydraulic devices (e.g., hydraulic pumps) of the hydraulic excavator. This invention is not limited in its embodiments. Figure 5 As shown, the electronically controlled engine control device based on a hydraulic excavator may include:

[0202] Memory 401 storing executable program code;

[0203] Processor 402 coupled to memory 401;

[0204] The processor 402 calls the executable program code stored in the memory 401 to execute the steps in the electronic engine control method based on a hydraulic excavator described in Embodiment 1 or Embodiment 2 of the present invention.

[0205] Example 5

[0206] This invention discloses a computer storage medium storing computer instructions. When these computer instructions are invoked, they are used to execute the steps in the electronic engine control method for a hydraulic excavator described in Embodiment 1 or Embodiment 2 of this invention.

[0207] Example 6

[0208] This 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 cause a computer to perform the steps in the electronic engine control method for a hydraulic excavator described in Embodiment 1 or Embodiment 2.

[0209] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0210] Through the detailed 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 necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, 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 for a hydraulic excavator disclosed in the embodiments of the present invention are merely preferred embodiments of the present invention and are only used to illustrate the technical solutions of the present invention, not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0212] When it is determined that the torque margin does not meet the preset torque margin condition, the hydraulic excavator inputs the torque margin into the preset torque margin calculation model for calculation, obtains the target relationship curve that matches the torque margin, matches the target relationship curve with the preset specific fuel consumption curve region, determines the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, 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 region.

Claims

1. A method for controlling an electronically controlled engine in a hydraulic excavator, applied to a hydraulic excavator, wherein the hydraulic excavator includes at least an electronically controlled engine, characterized in that, The method includes: When the hydraulic excavator is in operation, 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 changes, the hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the electronically controlled engine and the preset algorithm model, and determines whether the torque margin meets the preset torque margin condition. When it is determined that the torque margin does not meet the preset torque margin condition, the hydraulic excavator inputs the torque margin into the preset torque margin calculation model for calculation to obtain a target relationship curve that matches the torque margin. The target relationship curve is used to determine the optimal output power that matches the current torque of the electronically controlled engine. The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the obtained 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 based on the obtained current torque and angular velocity of the electronically controlled engine; The hydraulic excavator calculates the actual output power of the electronically controlled engine based on the theoretical output power and the preset component loss power of the electronically controlled engine. The formulas for calculating the theoretical output power and the actual output power are as follows: The The theoretical output power is expressed as described above. This represents the current torque of the electronically controlled engine. The value represents the current angular velocity of the electronically controlled engine. The actual output power is expressed as [the actual output power]. This represents the preset component loss power of the electronically controlled engine. It is calculated by analyzing the engine torque lost due to friction or wear during engine operation; The hydraulic excavator calculates the current torque margin of the electronically controlled engine based on the actual output power and a preset algorithm model. The calculation formula for the algorithm model is as follows: Among them, the This represents the current torque margin of the electronically controlled engine. This represents the rated output power of the electronically controlled engine.

2. The electronic engine control method for a hydraulic excavator according to claim 1, characterized in that, The method further includes: When it is determined that the torque margin meets the preset torque margin condition, the hydraulic excavator determines that the control mode of the electronically controlled engine is constant throttle speed regulation, and determines the output power that matches the torque margin of the electronically controlled engine. The hydraulic excavator determines the target output power corresponding to the hydraulic device inside the hydraulic excavator that matches the output power, and adjusts the current of the hydraulic device inside the hydraulic excavator according to the target output power.

3. The electronic engine control method for a hydraulic excavator according to claim 2, characterized in that, The method further includes: The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region. 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 region. 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.

4. The electronic engine control method for a hydraulic excavator according to claim 3, characterized in that, The target relationship curve is represented as the relationship curve between the torque and the speed of the electronically controlled engine. When it is determined that the torque margin does not meet the preset torque margin condition, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation, and obtains a target relationship curve that matches the torque margin, including: When it is determined that the torque margin is less than or equal to a preset margin threshold, the hydraulic excavator inputs the torque margin into a preset torque margin calculation model for calculation. When the torque margin is at a first threshold, the hydraulic excavator calculates a first relationship curve that matches the torque margin using the torque margin calculation model. When the torque margin is the second threshold, the hydraulic excavator calculates a second relationship curve that matches the torque margin through the torque margin calculation model; When the torque margin is the third threshold, the hydraulic excavator calculates a third relationship curve that matches the torque margin through the torque margin calculation model.

5. The electronic engine control method for a hydraulic excavator according to claim 4, characterized in that, The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve region to determine the optimal fuel consumption curve region where the target relationship curve coincides with the optimal specific fuel consumption curve region, including: The hydraulic excavator matches the target relationship curve with a preset specific fuel consumption curve region; When the target relationship curve is the first relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region; When the target relationship curve is the second relationship curve, the curve region where the target relationship curve coincides with the second specific fuel consumption curve region is determined as the optimal fuel consumption curve region; When the target relationship curve is the third relationship curve, the curve region where the target relationship curve and the third specific fuel consumption curve region coincide is determined as the optimal fuel consumption curve region.

6. The electronic engine control method for a hydraulic excavator according to claim 4, characterized in that, 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 region, the method further includes: The hydraulic excavator determines the target output power corresponding to the hydraulic device inside the hydraulic excavator that matches the optimal output power, and adjusts the current of the hydraulic device inside the hydraulic excavator according to the target output power; Furthermore, the method for determining the specific fuel consumption curve region is as follows: The hydraulic excavator acquires a set of real-time fuel consumption values ​​corresponding to each torque and speed collected when the electronically controlled engine was in operation, and determines the specific fuel consumption curve region corresponding to each torque and speed based on the set of real-time fuel consumption values.

7. An electronically controlled engine control device for a hydraulic excavator, applied to a hydraulic excavator, wherein the hydraulic excavator includes at least an electronically controlled engine, characterized in that, The device includes: The judgment module is used to determine whether the load rate of the electronically controlled engine has changed when the hydraulic excavator is in operation. The calculation module is used to calculate the current torque margin of the electronically controlled engine based on the current torque of the electronically controlled engine and a preset algorithm model when the judgment module determines that the load power of the electronically controlled engine has changed. The judgment module is also used to determine whether the torque margin meets the preset torque margin condition. The calculation module is further configured to input the torque margin into a preset torque margin calculation model for calculation when the judgment module determines that the torque margin does not meet the preset torque margin condition, and obtain a target relationship curve that matches the torque margin. The target relationship curve is used to determine the optimal output power that matches the torque of the current electronically controlled engine. The calculation module calculates the current torque margin of the electronically controlled engine based on the obtained current torque of the engine and a preset algorithm model. The specific method for obtaining the current torque margin of the electronically controlled engine is as follows: The theoretical output power of the electronically controlled engine is calculated based on the obtained current torque and angular velocity of the electronically controlled engine. The actual output power of the electronically controlled engine is calculated based on the theoretical output power and the preset component loss power of the electronically controlled engine. The formulas for calculating the theoretical output power and the actual output power are as follows: The The theoretical output power is expressed as described above. This represents the current torque of the electronically controlled engine. The value represents the current angular velocity of the electronically controlled engine. The actual output power is expressed as [the actual output power]. This represents the preset component loss power of the electronically controlled engine. It is calculated by analyzing the engine torque lost due to friction or wear during engine operation; The current torque margin of the electronically controlled engine is calculated based on the actual output power and the preset algorithm model. The calculation formula for the algorithm model is as follows: Among them, the This represents the current torque margin of the electronically controlled engine. This represents the rated output power of the electronically controlled engine.

8. An electronically controlled engine control device based on a hydraulic excavator, characterized in that, The device includes: Memory containing 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 1-6.

9. A computer storage medium, characterized in that, The computer storage medium stores computer instructions, which, when invoked, are used to execute the electronically controlled engine control method based on a hydraulic excavator as described in any one of claims 1-6.

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