Excavator control method, system and excavator based on electric auxiliary supercharging device

Abstract

The present invention discloses an excavator control method, system, and excavator based on an electrically assisted supercharging device. The method includes: when the excavator is started, the excavator control system obtains the current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, wherein the engine operating parameters include at least actual intake flow, required intake flow, and power parameters; determines whether the current engine power parameters meet preset power conditions; when it is determined that the current engine power parameters meet the preset power conditions, the excavator control system determines whether the actual intake flow is greater than or equal to the required intake flow; when it is determined that the actual intake flow is greater than or equal to the required intake flow, switches the auxiliary motor's operating mode to a power generation mode. Thus, the implementation of the present invention enables intelligent control of the excavator's engine and supercharging device, thereby improving the excavator's engine control efficiency and energy utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to an excavator control method and system based on an electric auxiliary supercharging device, and an excavator. Background Art

[0002] The boosting capacity of conventional turbochargers is limited by exhaust airflow. When an excavator is operating in low gear, the engine speed is low, exhaust airflow is minimal, and the turbocharger speed is low. This results in poor transient response, poor acceleration, insufficient torque, and high fuel consumption in the low-speed range. Existing technologies have addressed this issue by optimizing the engine combustion process, improving the fuel injection system, and employing VGT superchargers and dual-supercharger systems. However, these solutions still cannot completely resolve the supercharger hysteresis issue.

[0003] Existing excavator engines take a long time to respond after receiving feedback, relying solely on the engine's own response, failing to coordinate with the entire supporting machine. Furthermore, at high speeds, excess exhaust energy is discharged into the atmosphere through a bypass valve, resulting in excessive energy loss and low energy utilization.

[0004] Therefore, a control method, system and excavator based on an electric-assisted supercharging device are provided, which can improve the response control performance of the excavator to the built-in engine and supercharging device, thereby helping to improve the control efficiency and energy utilization rate of the excavator to the built-in engine and supercharging device. Summary of the Invention

[0005] The present invention provides a method and device for controlling an excavator based on an electric-assisted supercharging device, which can improve the response control performance of the excavator to the built-in engine and supercharging device, thereby helping to improve the control efficiency and energy utilization rate of the excavator to the built-in engine and supercharging device.

[0006] In order to solve the above technical problems, the first aspect of the present invention discloses an excavator control method based on an electric auxiliary supercharging device, the method comprising:

[0007] When the excavator is started, the excavator control system obtains current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, wherein the engine operating parameters include at least the actual intake flow rate, required intake flow rate, and power parameters of the engine; the auxiliary motor is used to adjust the intake flow rate of the supercharger for supercharging the engine;

[0008] The excavator control system determines whether the current power parameters of the engine meet the preset power conditions;

[0009] When it is determined that the current power parameters of the engine meet the preset power conditions, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate;

[0010] When it is determined that the actual intake air flow rate is greater than or equal to the required intake air flow rate, the excavator control system switches the operating mode of the auxiliary motor to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0011] As an optional embodiment, in the first aspect of the present invention, the electrically assisted supercharging device includes at least: the auxiliary motor and the supercharger, the operating parameters of the engine further include: the boost pressure parameters of the engine, and the power parameters include: the current speed parameters and torque parameters of the engine;

[0012] The excavator control system determines whether the current power parameters of the engine meet the preset power conditions. When it is determined that the current power parameters of the engine meet the preset power conditions, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, including:

[0013] The excavator control system determines whether a current speed parameter of the engine is greater than a preset speed threshold or whether a torque parameter is greater than a preset torque threshold;

[0014] When it is determined that the current speed parameter of the engine is greater than a preset speed threshold or the torque parameter is greater than a preset torque threshold, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate.

[0015] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0016] When it is determined that the current speed parameter of the engine is not greater than a preset speed threshold or the torque parameter is not greater than a preset torque threshold, the excavator control system calculates, based on the first curve parameter, the second curve parameter, and the required intake air flow, to obtain target operating parameters that match the required output power of the engine, and adjusts the operating parameters of the auxiliary motor based on the target operating parameters so that the auxiliary motor increases the intake air flow of the supercharger for supercharging the engine;

[0017] and, when it is determined that the actual intake air flow rate is less than the required intake air flow rate, the excavator control system calculates, based on the first curve parameter, the second curve parameter, and the required intake air flow rate, to obtain target operating parameters that match the output power required by the engine, and adjusts the operating parameters of the auxiliary motor based on the target operating parameters so that the auxiliary motor increases the intake air flow rate of the supercharger used to supercharge the engine;

[0018] The operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

[0019] As an optional embodiment, in the first aspect of the present invention, before the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, the method further includes:

[0020] The excavator control system obtains the current speed parameter of the engine within a plurality of preset time intervals;

[0021] The excavator control system calculates the load change rate of the engine at each interval according to the speed parameter at each interval, and determines whether the load change rate is greater than or equal to a preset load change rate threshold;

[0022] When it is determined that the load rate change rate is greater than or equal to a preset load rate change rate threshold, the excavator control system is triggered to execute the operation of determining whether the actual intake air flow rate is greater than or equal to the required intake air flow rate.

[0023] As an optional implementation, in the first aspect of the present invention, after adjusting the operating parameters of the auxiliary motor according to the target operating parameters, the method further includes:

[0024] The excavator control system obtains the intake air flow rate after the supercharger supercharges the engine;

[0025] The excavator control system adjusts the fuel injection amount of the engine according to the target operating parameter and the supercharged intake air flow rate.

[0026] As an optional embodiment, in the first aspect of the present invention, the excavator control system switches the operating mode of the auxiliary motor to a power generation mode so that the auxiliary motor generates electrical energy and stores the electrical energy in a power storage device, including:

[0027] The excavator control system controls the operation of cutting off the power supply to the auxiliary motor;

[0028] The excavator control system controls the supercharger to collect excess exhaust gas discharged from the engine, and utilizes the excess exhaust gas to drive the auxiliary motor, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0029] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0030] The excavator control system determines whether it is necessary to supply power to the electric control module of the excavator;

[0031] When it is determined that the electric control module of the excavator needs to be powered, the excavator control system controls the power storage device to power the electric control module;

[0032] and, when the auxiliary motor is in the power generation mode, the excavator control system determines whether the power value of the power storage device is greater than or equal to a preset power threshold;

[0033] When it is determined that the power value of the power storage device is greater than or equal to a preset power threshold, the excavator control system controls the auxiliary motor to directly power the excavator's electronic control module, or the excavator control system switches the power generation mode of the auxiliary motor to a stop state.

[0034] A second aspect of the present invention discloses an excavator control system based on an electric-assisted supercharging device, the device comprising:

[0035] an acquisition module, configured to acquire, when the excavator is started, current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, wherein the engine operating parameters include at least the actual intake flow rate, required intake flow rate, and power parameters of the engine, and the auxiliary motor is configured to adjust the intake flow rate of the supercharger for supercharging the engine;

[0036] a judgment module, configured to judge whether the current power parameter of the engine obtained by the obtaining module satisfies a preset power condition; and when it is judged that the current power parameter of the engine satisfies the preset power condition, judge whether the actual intake air flow rate is greater than or equal to the required intake air flow rate;

[0037] The switching module is used to switch the working mode of the auxiliary motor to the power generation mode when the judgment module determines that the actual intake flow rate is greater than or equal to the required intake flow rate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0038] As an optional embodiment, in the second aspect of the present invention, the electrically assisted supercharging device includes at least: the auxiliary motor and the supercharger, the operating parameters of the engine further include: the boost pressure parameters of the engine, and the power parameters include: the current speed parameters and torque parameters of the engine;

[0039] The determination module determines whether the current power parameters of the engine meet the preset power conditions. When it is determined that the current power parameters of the engine meet the preset power conditions, the specific method of determining whether the actual intake air flow rate is greater than or equal to the required intake air flow rate is as follows:

[0040] The excavator control system determines whether a current speed parameter of the engine is greater than a preset speed threshold or whether a torque parameter is greater than a preset torque threshold;

[0041] When it is determined that the current speed parameter of the engine is greater than a preset speed threshold or the torque parameter is greater than a preset torque threshold, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate.

[0042] As an optional embodiment, in the second aspect of the present invention, the device further includes:

[0043] a first calculation module, configured to calculate, based on the first curve parameter, the second curve parameter, and the required intake air flow rate, a target operating parameter that matches the required output power of the engine when the judgment module determines that the current speed parameter of the engine is not greater than a preset speed threshold or the torque parameter is not greater than a preset torque threshold;

[0044] an adjusting module, configured to adjust an operating parameter of the auxiliary motor according to the target operating parameter calculated by the first calculating module, so that the auxiliary motor increases an intake flow rate of the supercharger for supercharging the engine;

[0045] The first calculation module is further configured to, when the judgment module determines that the actual intake flow rate is less than the required intake flow rate, perform calculation based on the first curve parameter, the second curve parameter, and the required intake flow rate to obtain a target operating parameter that matches the output power required by the engine;

[0046] The adjustment module is further configured to adjust the operating parameters of the auxiliary motor according to the target operating parameters calculated by the first calculation module, so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine;

[0047] The operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

[0048] As an optional embodiment, in the second aspect of the present invention, the device further includes:

[0049] The acquisition module is further configured to acquire the current speed parameter of the engine within a plurality of preset intervals before the determination module determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate;

[0050] The second calculation module is further configured to calculate the load change rate of the engine at each interval based on the speed parameter at each interval acquired by the acquisition module;

[0051] The judgment module is also used to determine whether the load rate change rate calculated by the second calculation module is greater than or equal to a preset load rate change threshold; when the load rate change rate is greater than or equal to the preset load rate change threshold, it triggers the execution of the operation of determining whether the actual intake flow rate is greater than or equal to the required intake flow rate.

[0052] As an optional embodiment, in the second aspect of the present invention, the device further includes:

[0053] The acquisition module is further configured to acquire the intake air flow rate after the supercharger supercharges the engine after the adjustment module adjusts the operating parameters of the auxiliary motor according to the target operating parameters;

[0054] The adjustment module is further configured to adjust the fuel injection amount of the engine according to the target operating parameter calculated by the first calculation module and the boosted intake air flow obtained by the acquisition module.

[0055] As an optional embodiment, in the second aspect of the present invention, the switching module switches the operating mode of the auxiliary motor to the power generation mode so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device in a specific manner as follows:

[0056] controlling an operation of cutting off power supply to the auxiliary motor;

[0057] The supercharger is controlled to collect excess exhaust gas discharged by the engine, and the excess exhaust gas is used to drive the auxiliary motor, so that the auxiliary motor generates electrical energy and stores the electrical energy in a power storage device.

[0058] As an optional embodiment, in the second aspect of the present invention, the device further includes:

[0059] The judgment module is further used to judge whether it is necessary to supply power to the electric control module of the excavator;

[0060] a control module, configured to control the power storage device to supply power to the electric control module when the judgment module determines that power needs to be supplied to the electric control module of the excavator;

[0061] Furthermore, the judgment module is further configured to judge whether the power value of the power storage device is greater than or equal to a preset power threshold when the auxiliary motor is in the power generation mode;

[0062] The control module is further configured to control the auxiliary motor to directly supply power to the electric control module of the excavator when the judgment module determines that the power value of the power storage device is greater than or equal to a preset power threshold;

[0063] The switching module is further configured to switch the power generation mode of the auxiliary motor to a stop state when the judging module judges that the power value of the power storage device is greater than or equal to a preset power threshold.

[0064] A third aspect of the present invention discloses an excavator, which is used to execute the excavator control method based on the electric-assisted supercharging device disclosed in the first aspect of the present invention.

[0065] A fourth aspect of the present invention discloses another excavator control system based on an electric-assisted supercharging device, the device comprising:

[0066] a memory storing executable program code;

[0067] a processor coupled to the memory;

[0068] The processor calls the executable program code stored in the memory to execute the excavator control method based on the electric-assisted supercharging device disclosed in the first aspect of the present invention.

[0069] The fifth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the excavator control method based on the electric assisted supercharging device disclosed in the first aspect of the present invention.

[0070] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0071] The present invention provides an excavator control method, system, and excavator based on an electrically assisted supercharging device. The method includes: when the excavator is started, the excavator control system obtains current engine operating parameters, first curve parameters, and second curve parameters of an auxiliary motor, wherein the engine operating parameters include at least the current actual engine intake flow rate, the required intake flow rate, and power parameters; the auxiliary motor is used to adjust the intake flow rate of the supercharger for supercharging the engine; the excavator control system determines whether the current engine power parameters meet preset power conditions; when it is determined that the current engine power parameters meet the preset power conditions, the excavator control system determines whether the actual intake flow rate is greater than or equal to the required intake flow rate; when it is determined that the actual intake flow rate is greater than or equal to the required intake flow rate, the excavator control system switches the operating mode of the auxiliary motor to a power generation mode, so that the auxiliary motor generates electricity and stores the electricity in a storage device, thereby reducing energy loss caused by exhaust gas and improving the working efficiency of the supercharging device. Therefore, the implementation of the present invention can realize intelligent control of the excavator, improve the excavator's responsive control performance to the built-in engine and supercharging device, and thereby improve the excavator's control efficiency and energy utilization rate for the built-in engine and supercharging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0073] Figure 1 This is a flow chart of a method for controlling an excavator based on an electric-assisted supercharging device disclosed in an embodiment of the present invention;

[0074] Figure 2 1 is a flow chart of another excavator control method based on an electric-assisted supercharging device disclosed in an embodiment of the present invention;

[0075] Figure 3 This is a schematic structural diagram of an excavator control system based on an electric-assisted supercharging device disclosed in an embodiment of the present invention;

[0076] Figure 4 1 is a schematic structural diagram of another excavator control system based on an electric-assisted supercharging device disclosed in an embodiment of the present invention;

[0077] Figure 5 This is a structural schematic diagram of an excavator disclosed in an embodiment of the present invention;

[0078] Figure 6This is a schematic structural diagram of another excavator control system based on an electric-assisted supercharging device disclosed in an embodiment of the present invention;

[0079] Figure 7 This is a structural diagram of another excavator control system based on an electric-assisted supercharging device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0080] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0081] The terms "first," "second," and so on, in the description and claims of the present invention and the accompanying drawings are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed therein, or may optionally include other steps or elements inherent to such process, method, product, or end.

[0082] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0083] The present invention discloses an excavator control method, system, and excavator based on an electrically assisted supercharging device. When the excavator is started, the control method and system can obtain the current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, and determine whether the current engine power parameters meet preset power conditions. When it is determined that the current engine power parameters meet the preset power conditions, the control method determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate. When it is determined that the actual intake air flow rate is greater than or equal to the required intake air flow rate, the control method switches the auxiliary motor's operating mode to a power generation mode, causing the auxiliary motor to generate electrical energy and store the electrical energy in a power storage device. This reduces energy loss caused by exhausting excess gas and improves the operating efficiency of the supercharging device, thereby facilitating improved responsiveness and control performance of the excavator to the built-in engine and supercharging device, as well as improved control efficiency and energy utilization of the built-in engine and supercharging device. These are described in detail below.

[0084] Example 1

[0085] See also Figure 1 , Figure 1 This is a flow chart of a method for controlling an excavator based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 1 The excavator control method based on the electric-assisted supercharging device described can be applied to an excavator control system based on the electric-assisted supercharging device. The excavator control system can be applied to excavators (for example, hydraulic excavators, mechanical excavators, etc.), and the excavator control system can at least include an excavator control module, an engine control module, an electric-assisted supercharging device and a power storage device, and the electric-assisted supercharging device can be used to perform intake supercharging on the cylinders in the engine, which is not limited in the embodiments of the present invention. Figure 1 As shown, the excavator control method based on the electric auxiliary supercharging device may include the following operations:

[0086] 101. When the excavator is started, the excavator control system obtains the current engine operating parameters, the first curve parameters, and the second curve parameters of the auxiliary motor.

[0087] In the embodiment of the present invention, optionally, Figure 7As shown, the excavator control system may include an excavator control module (excavator ECM), an engine control module (engine ECM), an electric auxiliary supercharging device and a storage device. The type of the engine may be a diesel electronically controlled engine, etc. The operating parameters of the engine may at least include the actual intake flow, required intake flow, power parameters and boost pressure parameters of the current engine. The operating parameters may be collected through the engine control module, wherein the electric auxiliary supercharging device may be used to perform intake supercharging on the cylinders in the engine, and the electric auxiliary supercharging device may include: an auxiliary motor (M) and a supercharger (for example: a turbocharger), the supercharger may include: a turbine device and a compressor device, the engine control module controls the auxiliary motor by sending a power intervention signal, the auxiliary motor is used to adjust the intake flow of the supercharger for supercharging the engine, and the power parameters may include: the current engine speed parameter and torque parameter. Furthermore, the required intake flow rate is a real-time changing value calculated from the real-time speed and real-time load rate of the engine. The first curve parameter of the engine is represented by its torque-speed relationship curve, and the second curve parameter of the auxiliary motor is represented by its power-speed relationship curve. The first curve parameter and the second curve parameter are obtained through bench testing.

[0088] In this way, when the excavator is started, the excavator control system obtains the current engine operating parameters, the first curve parameters and the second curve parameters of the auxiliary motor, so as to subsequently compare the actual intake flow of the engine with the required intake flow, and control the supercharging device and the engine according to the comparison results. This can improve the excavator's response control performance to the built-in engine and supercharging device, thereby helping to improve the excavator's control efficiency and energy utilization of the built-in engine and supercharging device.

[0089] 102. The excavator control system determines whether the current power parameters of the engine meet the preset power conditions. When it is determined that the current power parameters of the engine meet the preset power conditions, the operation of step 103 may be executed.

[0090] In an embodiment of the present invention, optionally, the power parameters can be expressed as real-time speed parameters and real-time torque parameters corresponding to the engine in the current working gear of the excavator, and the preset power conditions can be expressed as preset speed thresholds and preset torque thresholds corresponding to the engine in the current working gear of the excavator, and the preset speed thresholds and preset torque thresholds are respectively the maximum speed and maximum torque corresponding to the working gear.

[0091] In an embodiment of the present invention, the excavator control system determines whether the current engine power parameters meet the preset power conditions. When it is determined that the current engine power parameters meet the preset power conditions, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, which may include:

[0092] The excavator control module in the excavator control system determines whether a current engine speed parameter is greater than a preset speed threshold or whether a torque parameter is greater than a preset torque threshold.

[0093] When it is determined that the current engine speed parameter is greater than a preset speed threshold or the torque parameter is greater than a preset torque threshold, the excavator control module determines whether the actual intake air flow is greater than or equal to the required intake air flow.

[0094] The speed threshold may be set according to the high-speed gear of different types of excavators. For example, the speed of the high-speed gear of a diesel electronically controlled excavator is 1450 rpm.

[0095] In this way, the excavator control system determines whether the current engine power parameters meet the preset power conditions. When the current engine power parameters meet the preset power conditions, the actual intake flow rate is compared with the required intake flow rate to adjust the supercharger's boost air flow to the engine according to the comparison results, which is beneficial to improving the machine's control efficiency and energy utilization of the built-in engine and supercharging device.

[0096] 103. The excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate. When it is determined that the actual intake air flow rate is greater than or equal to the required intake air flow rate, the operation of step 104 can be executed.

[0097] In this way, by judging whether the actual intake flow rate is greater than or equal to the required intake flow rate, when it is judged that the actual intake flow rate is greater than or equal to the required intake flow rate, the impulse generated by the excess exhaust flow discharged by the engine can be used to drive the rotor components in the auxiliary motor to rotate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device, thereby reducing the energy loss caused by the excess gas discharged, improving the working efficiency of the supercharging device, and thus helping to improve the excavator's control efficiency and energy utilization rate of the built-in engine and supercharging device.

[0098] 104. The excavator control system switches the working mode of the auxiliary motor to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0099] In an embodiment of the present invention, the excavator control system switches the working mode of the auxiliary motor to the power generation mode so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device, which may include:

[0100] The excavator control module in the excavator control system controls the operation of cutting off the power supply to the auxiliary motor.

[0101] The excavator control module controls the supercharger to collect excess exhaust flow discharged by the engine, and uses the impulse generated by the excess exhaust flow to drive the rotor components in the auxiliary motor to rotate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device.

[0102] In this way, when it is determined that the actual intake flow rate is greater than or equal to the required intake flow rate, the excavator control system controls the supercharger to collect the exhaust flow discharged by the engine, and uses the impulse generated by the exhaust flow to drive the rotor components in the auxiliary motor to rotate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device, thereby reducing the energy loss caused by the excess gas discharged, improving the working efficiency of the supercharging device, and thus helping to improve the excavator's control efficiency and energy utilization rate of the built-in engine and supercharging device.

[0103] In an optional embodiment, after performing the operation of step 102, the method may further include the following operations:

[0104] When it is determined that the current engine speed parameter is not greater than the preset speed threshold or the torque parameter is not greater than the preset torque threshold, the excavator control module in the excavator control system calculates according to the first curve parameter, the second curve parameter and the required intake flow rate to obtain the target operating parameters that match the output power required by the engine, and adjusts the operating parameters of the auxiliary motor according to the target operating parameters so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine.

[0105] The operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

[0106] In this optional embodiment, optionally, after adjusting the operating parameters of the auxiliary motor according to the target operating parameters, the method further includes the following operations:

[0107] The excavator control system obtains the intake air flow after the supercharger boosts the engine.

[0108] The excavator control system adjusts the engine's fuel injection rate based on target operating parameters and the supercharged intake air flow.

[0109] It can be seen that this optional embodiment can calculate according to the first curve parameter, the second curve parameter and the required intake flow rate when the excavator control system determines that the current engine speed parameter is not greater than the preset speed threshold or the torque parameter is not greater than the preset torque threshold, and obtain the target operating parameters that match the output power required by the engine, and adjust the operating parameters of the auxiliary motor according to the target operating parameters so that the auxiliary motor increases the intake flow rate of the supercharger for engine supercharging, and adjusts the engine's fuel injection amount, thereby improving the working efficiency of the supercharging device and the power of the engine, which is beneficial to improving the excavator's response control performance to the built-in engine and supercharging device.

[0110] In another optional embodiment, after performing the operation of step 103, the method may further include the following operations:

[0111] When it is determined that the actual intake flow rate is less than the required intake flow rate, the excavator control module in the excavator control system calculates according to the first curve parameters, the second curve parameters and the required intake flow rate to obtain target operating parameters that match the output power required by the engine, and adjusts the operating parameters of the auxiliary motor according to the target operating parameters so that the auxiliary motor increases the intake flow rate of the supercharger for boosting the engine.

[0112] In this optional embodiment, optionally, after adjusting the operating parameters of the auxiliary motor according to the target operating parameters, the method further includes the following operations:

[0113] The excavator control system obtains the intake air flow after the supercharger boosts the engine.

[0114] The excavator control system adjusts the engine's fuel injection rate based on target operating parameters and the supercharged intake air flow.

[0115] It can be seen that this optional embodiment can calculate according to the first curve parameters, the second curve parameters and the required intake flow rate when the excavator control system determines that the actual intake flow rate is less than the required intake flow rate, and obtain the target operating parameters that match the output power required by the engine, and adjust the operating parameters of the auxiliary motor according to the target operating parameters, so that the auxiliary motor can increase the intake flow rate of the supercharger for engine supercharging, and adjust the fuel injection amount of the engine, thereby improving the working efficiency of the supercharging device and the power of the engine, which is beneficial to improving the response control performance of the excavator to the built-in engine and the supercharging device.

[0116] In yet another optional embodiment, after executing step 104, the method may further include the following operations:

[0117] The excavator control system determines whether it is necessary to power the excavator's electronic control modules (for example, the instrument display module, lighting module, communication module, refrigeration module, etc. in the excavator).

[0118] When it is determined that the electric control module of the excavator needs to be powered, the excavator control system controls the power storage device to power the electric control module.

[0119] Furthermore, when the auxiliary motor is in the power generation mode, the excavator control system determines whether the power value of the power storage device is greater than or equal to a preset power threshold (for example, 99%).

[0120] When it is determined that the power value of the storage device is greater than or equal to the preset power threshold, the excavator control system controls the auxiliary motor to directly power the excavator's electronic control module, or the excavator control system switches the power generation mode of the auxiliary motor to a stop state.

[0121] It can be seen that this optional embodiment can determine whether it is necessary to power the electronic control module of the excavator. When it is necessary to power the electronic control module of the excavator, it controls the power storage device to power the electronic control module. It can also determine whether the power storage device is close to full charge. When it is close to full charge, it can control the auxiliary motor to directly power the electronic control module of the excavator, or switch the power generation mode of the auxiliary motor to a stopped state.

[0122] Example 2

[0123] See also Figure 2 , Figure 2 It is a flow chart of an excavator control method based on an electric-assisted supercharging device disclosed in an embodiment of the present invention. Figure 2 This is a flow chart of a method for controlling an excavator based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 2 The excavator control method based on the electric-assisted supercharging device described can be applied to an excavator control system based on the electric-assisted supercharging device. The excavator control system can be applied to excavators (for example, hydraulic excavators, mechanical excavators, etc.), and the excavator control system can at least include an excavator control module, an engine control module, an electric-assisted supercharging device and a power storage device, and the electric-assisted supercharging device can be used to perform intake supercharging on the cylinders in the engine, which is not limited in the embodiments of the present invention. Figure 2 As shown, the excavator control method based on the electric auxiliary supercharging device may include the following operations:

[0124] 201. When the excavator is started, the excavator control system obtains the current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor.

[0125] 202. The excavator control system determines whether the current power parameters of the engine meet the preset power conditions. When it is determined that the current power parameters of the engine meet the preset power conditions, the operation of step 203 can be executed.

[0126] 203. The excavator control system obtains the speed parameters of the current engine in a plurality of preset time intervals, and calculates the load change rate of the engine in each time interval based on the speed parameters in each time interval.

[0127] In an embodiment of the present invention, the excavator control system calculates the load change rate of the engine at each interval according to the speed parameter at each interval in a specific manner as follows:

[0128] The engine control module in the excavator control system constructs a speed parameter-time curve based on the speed parameter at each interval. The derivative of this curve is then derived, representing the real-time engine speed change rate. This real-time speed change rate is then determined as the engine load change rate at each interval. Furthermore, this real-time speed change rate is proportional to the load change rate. A positive engine load change rate indicates that the excavator's gear is increasing and the excavator is in a loaded state. A negative engine load change rate indicates that the excavator's gear is decreasing and the excavator is in a reduced load state.

[0129] 204. The excavator control system determines whether the load rate change rate is greater than or equal to a preset load rate change rate threshold. When the load rate change rate is greater than or equal to the preset load rate change rate threshold, the operation of step 205 may be executed.

[0130] In the embodiment of the present invention, optionally, the preset load change rate threshold is a positive number. When the load change rate is less than the preset load change rate threshold, the operation of step 203 may be re-executed.

[0131] 205. The excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate. When it is determined that the actual intake air flow rate is greater than or equal to the required intake air flow rate, the operation of step 206 can be executed.

[0132] 206. The excavator control system switches the working mode of the auxiliary motor to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0133] In the embodiment of the present invention, for other descriptions of steps 201-202 and steps 205-206, please refer to the detailed description of steps 101-104 in the first embodiment, and the embodiment of the present invention will not be repeated.

[0134] It can be seen that the implementation of the embodiment of the present invention can, after the excavator control system determines that the power parameters of the current engine meet the preset power conditions, calculate the load change rate of the engine at each interval based on the speed parameters at each interval, and determine whether the load rate change rate is greater than or equal to the preset load change rate threshold. When the load rate change rate is greater than or equal to the preset load change rate threshold, determine whether the actual intake flow rate is greater than or equal to the required intake flow rate, so as to determine the real-time working status of the excavator according to the engine load condition of the excavator, and thereby intelligently adjust the engine boost according to the real-time working status of the excavator, which is beneficial to improving the response control performance of the excavator to the built-in engine and the boost device, as well as improving the control efficiency and energy utilization rate of the excavator to the built-in engine and the boost device.

[0135] It can be seen that implementation Figure 2 The described excavator control method based on the electric auxiliary supercharging device can obtain the current engine operating parameters when the excavator is started, and determine whether the current engine power parameters meet the preset power conditions. When the power parameters meet the preset power conditions, it determines whether the actual intake air flow is greater than or equal to the required intake air flow. When the actual intake air flow is greater than or equal to the required intake air flow, the working mode of the auxiliary motor is switched to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device, so as to reduce the energy loss caused by the exhaust of excess gas and improve the working efficiency of the supercharging device; and when the excavator control system determines that the current engine power parameters meet the preset power conditions, the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device, so as to reduce the energy loss caused by the exhaust of excess gas and improve the working efficiency of the supercharging device. After the condition is met, the load change rate of the engine in each interval is calculated according to the speed parameter in each interval, and it is judged whether the load change rate is greater than or equal to the preset load change rate threshold. When the load change rate is greater than or equal to the preset load change rate threshold, it is judged whether the actual intake air flow is greater than or equal to the required intake air flow, so as to determine the real-time working state of the excavator according to the engine load condition of the excavator, and thus make intelligent adjustments to the engine boost according to the real-time working state of the excavator, which is conducive to improving the response control performance of the excavator to the built-in engine and the boost device, as well as improving the control efficiency and energy utilization rate of the excavator to the built-in engine and the boost device.

[0136] Example 3

[0137] See also Figure 3 , Figure 3 It is a structural schematic diagram of an excavator control system based on an electric-assisted supercharging device disclosed in an embodiment of the present invention. Figure 3 This is a flow chart of a method for controlling an excavator based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 3The excavator control system based on the electric-assisted supercharging device described above can execute the excavator control method based on the electric-assisted supercharging device. The excavator control system can be applied to excavators (for example, hydraulic excavators, mechanical excavators, etc.), and the excavator control system can at least include an excavator control module, an engine control module, an electric-assisted supercharging device and a power storage device, and the electric-assisted supercharging device can be used to supercharge the cylinders in the engine. The embodiment of the present invention is not limited. Figure 3 As shown, the excavator control system based on the electric auxiliary supercharging device may include an acquisition module 301, a judgment module 302, and a switching module 303, wherein:

[0138] The acquisition module 301 is used to obtain the current engine operating parameters, first curve parameters and second curve parameters of the auxiliary motor when the excavator is started, wherein the engine operating parameters at least include the actual intake flow, required intake flow and power parameters of the current engine, and the auxiliary motor is used to adjust the intake flow of the supercharger to boost the engine.

[0139] The judgment module 302 is used to judge whether the power parameters of the current engine obtained by the acquisition module 301 meet the preset power conditions; when it is judged that the power parameters of the current engine meet the preset power conditions, it is judged whether the actual intake flow rate is greater than or equal to the required intake flow rate.

[0140] The switching module 303 is used to switch the working mode of the auxiliary motor to the power generation mode when the judgment module 302 judges that the actual intake flow rate is greater than or equal to the required intake flow rate, so that the auxiliary motor generates electricity and stores the electricity in the power storage device.

[0141] It can be seen that implementation Figure 3 The described excavator control system based on the electric auxiliary supercharging device can obtain the current engine operating parameters when the excavator is started, and determine whether the current engine power parameters meet the preset power conditions. When the power parameters meet the preset power conditions, it determines whether the actual intake flow rate is greater than or equal to the required intake flow rate. When the actual intake flow rate is greater than or equal to the required intake flow rate, the working mode of the auxiliary motor is switched to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device, so as to reduce the energy loss caused by the exhaust of excess gas, improve the working efficiency of the supercharging device, and thereby improve the excavator's control efficiency and energy utilization rate of the built-in engine and supercharging device.

[0142] In an optional embodiment, the electric auxiliary supercharging device includes at least: an auxiliary motor and a supercharger, the engine operating parameters also include: the engine boost pressure parameters, and the power parameters include: the current engine speed parameters and torque parameters.

[0143] As well as Figure 4 As shown, the judgment module 302 judges whether the current engine power parameters meet the preset power conditions. When it is judged that the current engine power parameters meet the preset power conditions, the specific method of judging whether the actual intake flow rate is greater than or equal to the required intake flow rate is as follows:

[0144] The excavator control system determines whether the current engine speed parameter is greater than a preset speed threshold or whether the torque parameter is greater than a preset torque threshold.

[0145] When it is determined that the current engine speed parameter is greater than a preset speed threshold or the torque parameter is greater than a preset torque threshold, the excavator control system determines whether the actual intake air flow is greater than or equal to the required intake air flow.

[0146] It can be seen that implementation Figure 4 The described excavator control system based on the electric-assisted supercharging device can determine whether the current engine power parameters meet the preset power conditions. When the current engine power parameters meet the preset power conditions, the actual intake flow rate is compared with the required intake flow rate to adjust the supercharger's boost air flow rate to the engine according to the comparison results, thereby helping to improve the machine's control efficiency and energy utilization of the built-in engine and supercharging device.

[0147] In another optional embodiment, Figure 4 As shown, the device also includes:

[0148] The first calculation module 304 is used to calculate the target operating parameters that match the output power required by the engine based on the first curve parameters, the second curve parameters, and the required intake flow when the judgment module 302 determines that the current engine speed parameter is not greater than the preset speed threshold or the torque parameter is not greater than the preset torque threshold, to obtain the target operating parameters.

[0149] The adjustment module 305 is configured to adjust the operating parameters of the auxiliary motor according to the target operating parameters calculated by the first calculation module 304 , so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine.

[0150] The first calculation module 304 is also used to calculate the target operating parameters that match the output power required by the engine based on the first curve parameters, the second curve parameters and the required intake flow when the judgment module 302 determines that the actual intake flow is less than the required intake flow.

[0151] The adjustment module 305 is further configured to adjust the operating parameters of the auxiliary motor according to the target operating parameters calculated by the first calculation module 304 , so that the auxiliary motor increases the intake flow of the supercharger for supercharging the engine.

[0152] The operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

[0153] It can be seen that implementation Figure 4 The described excavator control system based on the electric auxiliary supercharging device can, when it is judged that the current engine speed parameter is not greater than the preset speed threshold or the torque parameter is not greater than the preset torque threshold, or when it is judged that the actual intake flow rate is less than the required intake flow rate, calculate according to the first curve parameter, the second curve parameter and the required intake flow rate to obtain the target operating parameters that match the output power required by the engine, and adjust the operating parameters of the auxiliary motor according to the target operating parameters so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine, thereby improving the working efficiency of the supercharging device and the power of the engine, which is beneficial to improving the response control performance of the excavator to the built-in engine and supercharging device.

[0154] In another optional embodiment, Figure 4 As shown, the device also includes:

[0155] The acquisition module 301 is further configured to acquire the speed parameters of the current engine within a plurality of preset intervals before the determination module 302 determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate.

[0156] The second calculation module 306 is further configured to calculate the load change rate of the engine at each interval according to the speed parameter at each interval acquired by the acquisition module 301 .

[0157] The judgment module 302 is also used to determine whether the load rate change rate calculated by the second calculation module 306 is greater than or equal to a preset load rate change threshold; when the load rate change rate is greater than or equal to the preset load rate change threshold, it triggers the execution of an operation to determine whether the actual intake flow rate is greater than or equal to the required intake flow rate.

[0158] It can be seen that implementation Figure 4 The described excavator control system based on the electric-assisted supercharging device can, after determining that the current engine power parameters meet the preset power conditions, calculate the load change rate of the engine in each interval based on the speed parameters in each interval, and determine whether the load rate change rate is greater than or equal to the preset load change rate threshold. When the load rate change rate is greater than or equal to the preset load change rate threshold, determine whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, so as to determine the real-time working status of the excavator according to the engine load condition of the excavator, and thus intelligently adjust the engine supercharging according to the real-time working status of the excavator, which is beneficial to improving the response control performance of the excavator to the built-in engine and supercharging device, as well as improving the control efficiency and energy utilization rate of the excavator to the built-in engine and supercharging device.

[0159] In another optional embodiment, Figure 4 As shown, the device also includes:

[0160] The acquisition module 301 is further configured to acquire the intake air flow rate after the supercharger supercharges the engine after the adjustment module 305 adjusts the operating parameters of the auxiliary motor according to the target operating parameters.

[0161] The adjustment module 305 is further configured to adjust the fuel injection amount of the engine according to the target operating parameter calculated by the first calculation module 304 and the boosted intake air flow obtained by the acquisition module 301 .

[0162] It can be seen that implementation Figure 4 The described excavator control system based on the electric-assisted supercharging device can, when it is determined that the current engine speed parameter is not greater than the preset speed threshold or the torque parameter is not greater than the preset torque threshold, calculate according to the first curve parameter, the second curve parameter and the required intake flow rate to obtain the target operating parameters that match the output power required by the engine, and adjust the engine's fuel injection amount according to the target operating parameters and the intake flow rate after the engine is supercharged, thereby improving the working efficiency of the supercharging device and the power of the engine, which is beneficial to improving the excavator's response control performance to the built-in engine and supercharging device.

[0163] In another optional embodiment, Figure 4 As shown, the switching module 303 switches the working mode of the auxiliary motor to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device in the following specific manners:

[0164] Controls the operation of cutting off the power supply to the auxiliary motor.

[0165] The supercharger is controlled to collect excess exhaust gas flow discharged by the engine, and the excess exhaust gas flow is used to drive the auxiliary motor, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

[0166] It can be seen that implementation Figure 4 The described excavator control system based on the electric auxiliary supercharging device can control the supercharger to collect the exhaust flow discharged by the engine when it is judged that the actual intake flow is greater than or equal to the required intake flow, and use the impulse generated by the exhaust flow to drive the rotor components in the auxiliary motor to rotate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the storage device, thereby reducing the energy loss caused by the excess gas discharged, improving the working efficiency of the supercharging device, and thus helping to improve the excavator's control efficiency and energy utilization of the built-in engine and supercharging device.

[0167] In another optional embodiment, Figure 4As shown, the device also includes:

[0168] The judgment module 302 is further used to judge whether it is necessary to supply power to the electric control module of the excavator.

[0169] The control module 307 is configured to control the power storage device to supply power to the electric control module when the judgment module 302 determines that the electric control module of the excavator needs to be supplied with power.

[0170] Furthermore, the judgment module 302 is further configured to judge whether the power value of the power storage device is greater than or equal to a preset power threshold when the auxiliary motor is in the power generation mode.

[0171] The control module 307 is further configured to control the auxiliary motor to directly supply power to the electronic control module of the excavator when the judgment module 302 determines that the power value of the power storage device is greater than or equal to a preset power threshold.

[0172] The switching module 303 is further configured to switch the power generation mode of the auxiliary motor to a stop state when the judging module 302 judges that the power value of the power storage device is greater than or equal to a preset power threshold.

[0173] It can be seen that implementation Figure 4 The described excavator control system based on the electric auxiliary boosting device can determine whether the excavator's electronic control module needs to be powered. When the excavator's electronic control module needs to be powered, it controls the power storage device to power the electronic control module. It can also determine whether the power storage device is close to full charge. When it is close to full charge, it can control the auxiliary motor to directly power the excavator's electronic control module, or switch the auxiliary motor's power generation mode to a stopped state.

[0174] Example 4

[0175] See also Figure 5 , Figure 5 Schematic diagram of the structure of an excavator disclosed in an embodiment of the present invention. Figure 5 As shown, the excavator may include an excavator control system based on an electric auxiliary boosting device, and is used to achieve Figure 1 or Figure 2 The excavator control method based on the electric auxiliary supercharging device described in the embodiment. Optionally, the excavator control system based on the electric auxiliary supercharging device can be Figure 3 or Figure 4 The described excavator control system based on the electric-assisted supercharging device is not limited in the embodiments of the present invention.

[0176] Example 5

[0177] See also Figure 6 , Figure 6This is a structural diagram of another excavator control system based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 6 As shown, the excavator control system based on the electric auxiliary boosting device may include:

[0178] A memory 401 storing executable program code;

[0179] a processor 402 coupled to the memory 401;

[0180] The processor 402 calls the executable program code stored in the memory 401 to execute the steps of the excavator control method based on the electric-assisted supercharging device described in the first embodiment of the present invention or the second embodiment of the present invention.

[0181] Example 6

[0182] 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 excavator control method based on the electric assisted supercharging device described in the first embodiment or the second embodiment of the present invention.

[0183] Example 7

[0184] 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 of the excavator control method based on an electric assisted boosting device described in Example 1 or Example 2.

[0185] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Those skilled in the art can understand and implement the present invention without inventive effort.

[0186] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by means of hardware. Based on this understanding, the above technical solution, in essence, or the portion that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, including 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 programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0187] Finally, it should be noted that the excavator control method, system and excavator based on the electric assisted supercharging device disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit them. 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.

Claims

1. A control method for an excavator based on an electric-assisted supercharging device, applied to an excavator control system, wherein the excavator system at least includes an electric-assisted supercharging device, characterized in that: The method comprises: When the excavator is started, the excavator control system obtains current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, wherein the engine operating parameters include at least the actual intake flow rate, required intake flow rate, and power parameters of the engine; the auxiliary motor is used to adjust the intake flow rate of the supercharger for supercharging the engine; the first curve parameters are expressed as a torque-speed relationship curve of the engine, and the second curve parameters are expressed as a power-speed relationship curve of the auxiliary motor; The excavator control system determines whether the current power parameter of the engine meets a preset power condition, wherein the preset power condition is represented by a speed parameter of the engine being greater than a preset speed threshold or a torque parameter being greater than a preset torque threshold; When it is determined that the current power parameters of the engine meet the preset power conditions, the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate; When it is determined that the actual intake air flow rate is greater than or equal to the required intake air flow rate, the excavator control system switches the operating mode of the auxiliary motor to the power generation mode, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

2. The excavator control method based on the electric auxiliary supercharging device according to claim 1 is characterized in that: The electric auxiliary supercharging device includes at least: the auxiliary motor and the supercharger. The operating parameters of the engine also include: the boost pressure parameters of the engine. The power parameters include: the current speed parameters and torque parameters of the engine.

3. The excavator control method based on the electric auxiliary supercharging device according to claim 2 is characterized in that: The method further comprises: When it is determined that the current speed parameter of the engine is not greater than a preset speed threshold or the torque parameter is not greater than a preset torque threshold, the excavator control system calculates, based on the first curve parameter, the second curve parameter, and the required intake air flow rate, to obtain target operating parameters that match the required output power of the engine, and adjusts the operating parameters of the auxiliary motor based on the target operating parameters so that the auxiliary motor increases the intake air flow rate of the supercharger for supercharging the engine; and, when it is determined that the actual intake air flow rate is less than the required intake air flow rate, the excavator control system calculates, based on the first curve parameter, the second curve parameter, and the required intake air flow rate, to obtain target operating parameters that match the output power required by the engine, and adjusts operating parameters of the auxiliary motor based on the target operating parameters so that the auxiliary motor increases the intake air flow rate of the supercharger used to supercharge the engine; The operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

4. The excavator control method based on the electric auxiliary supercharging device according to claim 2, characterized in that: Before the excavator control system determines whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, the method further includes: The excavator control system obtains the current speed parameter of the engine within a plurality of preset time intervals; The excavator control system calculates the load change rate of the engine at each interval according to the speed parameter at each interval, and determines whether the load change rate is greater than or equal to a preset load change rate threshold; When it is determined that the load rate change rate is greater than or equal to a preset load rate change rate threshold, the excavator control system is triggered to execute the operation of determining whether the actual intake air flow rate is greater than or equal to the required intake air flow rate.

5. The excavator control method based on the electric auxiliary supercharging device according to claim 3 is characterized in that: After adjusting the operating parameters of the auxiliary motor according to the target operating parameters, the method further includes: The excavator control system obtains the intake air flow rate after the supercharger supercharges the engine; The excavator control system adjusts the fuel injection amount of the engine according to the target operating parameter and the supercharged intake air flow rate.

6. The excavator control method based on the electric auxiliary supercharging device according to claim 1, characterized in that: The excavator control system switches the working mode of the auxiliary motor to the power generation mode so that the auxiliary motor generates electric energy and stores the electric energy in the power storage device, including: The excavator control system controls the operation of cutting off the power supply to the auxiliary motor; The excavator control system controls the supercharger to collect excess exhaust gas discharged from the engine, and utilizes the excess exhaust gas to drive the auxiliary motor, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

7. The excavator control method based on the electric auxiliary supercharging device according to claim 1, characterized in that: The method further comprises: The excavator control system determines whether it is necessary to supply power to the electric control module of the excavator; When it is determined that the electric control module of the excavator needs to be powered, the excavator control system controls the power storage device to power the electric control module; and, when the auxiliary motor is in the power generation mode, the excavator control system determines whether the power value of the power storage device is greater than or equal to a preset power threshold; When it is determined that the power value of the power storage device is greater than or equal to a preset power threshold, the excavator control system controls the auxiliary motor to directly power the excavator's electronic control module, or the excavator control system switches the power generation mode of the auxiliary motor to a stop state.

8. An excavator control system based on an electric-assisted supercharging device, wherein the excavator system at least includes an electric-assisted supercharging device, characterized in that: The device comprises: an acquisition module, configured to acquire, when the excavator is started, current engine operating parameters, first curve parameters, and second curve parameters of the auxiliary motor, wherein the engine operating parameters include at least the actual intake flow rate, required intake flow rate, and power parameters of the engine; the auxiliary motor is configured to adjust the intake flow rate of the supercharger for supercharging the engine; the first curve parameters are represented by a torque-speed relationship curve of the engine; and the second curve parameters are represented by a power-speed relationship curve of the auxiliary motor; a determination module, configured to determine whether the current power parameter of the engine acquired by the acquisition module satisfies a preset power condition; and when it is determined that the current power parameter of the engine satisfies the preset power condition, determine whether the actual intake air flow rate is greater than or equal to the required intake air flow rate, wherein the preset power condition is represented by a speed parameter of the engine being greater than a preset speed threshold or a torque parameter being greater than a preset torque threshold; The switching module is used to switch the working mode of the auxiliary motor to the power generation mode when the judgment module determines that the actual intake flow rate is greater than or equal to the required intake flow rate, so that the auxiliary motor generates electrical energy and stores the electrical energy in the power storage device.

9. An excavator, characterized in that: The excavator is used to execute the excavator control method based on the electric-assisted supercharging device according to any one of claims 1 to 7.

10. An excavator control system based on an electric auxiliary booster device, 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 excavator control method based on the electric assisted supercharging device according to any one of claims 1 to 7.

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