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

Abstract

The invention discloses an excavator control method and system based on an electric auxiliary supercharging device and an excavator, and the method comprises the steps that when the excavator is started, the excavator control system obtains working parameters and first curve parameters of a current engine and second curve parameters of an auxiliary motor, the working parameters of the engine at least comprise the actual air inlet flow, the required air inlet flow and the power parameters, whether the current power parameters of the engine meet the preset power conditions or not is judged, and when it is judged that the current power parameters of the engine meet the preset power conditions, the engine is started. And the excavator control system judges whether the actual air inlet flow is larger than or equal to the required air inlet flow or not, and when it is judged that the actual air inlet flow is larger than or equal to the required air inlet flow, the working mode of the auxiliary motor is switched into a power generation mode. Therefore, intelligent control over the engine and the supercharging device of the excavator can be achieved, and then the control efficiency and the energy utilization rate of the excavator over the engine are improved.

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 currently limited by exhaust airflow. When the excavator is working in a low gear, the engine speed is low, the exhaust airflow is small, and the turbocharger speed is low, which leads to problems such as poor transient response of the excavator in the low speed range, poor acceleration performance, insufficient torque, and high fuel consumption. To this end, the existing technology adopts solutions such as optimizing the engine combustion process, improving the fuel injection system, using VGT superchargers, and dual supercharger systems, but these solutions still cannot completely solve the problem of supercharger hysteresis.

[0003] The existing excavator engine takes a long time from receiving feedback to responding, and the whole process is the engine's own response, which fails to form coordination with the supporting whole machine. At the same time, in the high speed range, the excess exhaust energy will be discharged into the atmosphere through the bypass valve, resulting in excessive energy loss and low energy utilization.

[0004] Therefore, a control method, system and excavator of an 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 the supercharging device, thereby helping to improve the control efficiency and energy utilization rate of the excavator to the built-in engine and the 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 a built-in engine and a supercharging device, thereby facilitating improving the control efficiency and energy utilization rate of the excavator to the built-in engine and the 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 the current operating parameters of the engine, the first curve parameters and the second curve parameters of the auxiliary motor, wherein the operating parameters of the engine at least include the actual intake flow rate, the required intake flow rate and the power parameters of the current engine, and 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 parameter of the engine meets the preset power condition, 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 flow rate is greater than or equal to the required intake flow rate, 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.

[0011] As an optional embodiment, in the first aspect of the present invention, the electric auxiliary supercharging device at least includes: the auxiliary motor and the supercharger, the working parameters of the engine also 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 the current speed parameter of the engine is greater than a preset speed threshold or whether the 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 flow rate is greater than or equal to the required intake 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 according to the first curve parameter, the second curve parameter and the required intake air flow rate to obtain a target operating parameter that matches the output power required by the engine, and adjusts the operating parameter of the auxiliary motor according to the target operating parameter so that the auxiliary motor increases the intake air flow rate of the supercharger for supercharging the engine;

[0017] And, when it is determined that the actual intake flow rate is less than the required intake flow rate, the excavator control system calculates according to 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, and adjusts the operating parameter of the auxiliary motor according to the target operating parameter so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine;

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

[0019] As an optional implementation, 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 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 flow rate is greater than or equal to the required intake 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 boosted intake air flow rate.

[0026] As an optional implementation, in the first aspect 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, 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 flow discharged by the engine, and utilizes the excess exhaust gas flow to drive the auxiliary motor, so that the auxiliary motor generates electric energy and stores the electric 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 supply power to the electronic control module of the excavator, or the excavator control system switches the power generation mode of the auxiliary motor to a stop state.

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

[0035] An acquisition module, used for acquiring the current working parameters of the engine, the first curve parameters and the second curve parameters of the auxiliary motor when the excavator is started, wherein the working parameters of the engine at least include the actual intake flow rate, the required intake flow rate and the power parameters of the current engine, and the auxiliary motor is used for adjusting the intake flow rate of the supercharger for supercharging the engine;

[0036] a judging module, configured to judge whether the power parameters of the current engine acquired by the acquiring module meet the preset power conditions; when it is judged that the power parameters of the current engine meet the preset power conditions, judge whether the actual intake flow rate is greater than or equal to the required intake 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 judges 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 electric auxiliary supercharging device at least includes: the auxiliary motor and the supercharger, the working parameters of the engine also 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 judgment module judges whether the current power parameter of the engine meets the preset power condition. When it is judged that the current power parameter of the engine meets the preset power condition, the specific method of judging whether the actual intake flow rate is greater than or equal to the required intake flow rate is:

[0040] The excavator control system determines whether the current speed parameter of the engine is greater than a preset speed threshold or whether the 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 flow rate is greater than or equal to the required intake flow rate.

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

[0043] a first calculation module, configured to calculate, according to the first curve parameter, the second curve parameter and the required intake air flow rate, to obtain a target operating parameter matching the output power required by 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 the operating parameters of the auxiliary motor according to the target operating parameters calculated by the first calculating module, so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine;

[0045] The first calculation module is further configured to, when the judgment module judges 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 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] Wherein, the operating parameters of the auxiliary motor include the speed parameters and / or output power of the auxiliary motor.

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

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

[0050] The second calculation module is further used 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;

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

[0052] As an optional implementation, 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 used 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 implementation, in the second aspect of the present invention, the switching module 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 in a specific manner as follows:

[0056] Controlling cutting off the power supply to the auxiliary motor;

[0057] 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 electric energy and stores the electric energy in the power storage device.

[0058] As an optional implementation, 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 the electric control module of the excavator needs to be supplied with power;

[0061] And, the judgment module is further used 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 judges 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 auxiliary 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 auxiliary 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 electric auxiliary supercharging device, the method comprising: when the excavator is started, the excavator control system obtains the working parameters of the current engine, the first curve parameters and the second curve parameters of the auxiliary motor, wherein the working parameters of the engine at least include the actual intake flow rate, the required intake flow rate and the power parameters of the current engine, the auxiliary motor is used to adjust the intake flow rate of the supercharger to the engine, the excavator control system determines whether the power parameters of the current engine meet the preset power conditions, when it is determined that the power parameters of the current engine 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 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 can reduce the energy loss caused by the discharged excess gas, thereby improving the working efficiency of the supercharging device. It can be seen that the implementation of the present invention can intelligently control the excavator, improve the response control performance of the excavator to the built-in engine and the supercharging device, and thereby improve the control efficiency and energy utilization rate of the excavator to the built-in engine and the 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 It is a flow chart of an excavator control method based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention;

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

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

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

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

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

[0079] Figure 7 It is a structural schematic diagram of another excavator control system based on an electric auxiliary 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 scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

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

[0083] The present invention discloses an excavator control method, system and excavator based on an electric auxiliary supercharging device, which can obtain the working parameters of the current engine, the first curve parameters and the second curve parameters of the auxiliary motor when the excavator is started, and judge whether the power parameters of the current engine 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. When it is judged that 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 power storage device, so as to reduce the energy loss caused by the discharged excess gas and improve the working efficiency of the supercharging device, thereby facilitating the excavator to improve the response control performance of the built-in engine and the supercharging device, and improve the control efficiency and energy utilization rate of the excavator to the built-in engine and the supercharging device. The following are detailed descriptions.

[0084] Embodiment 1

[0085] See also Figure 1 , Figure 1 : 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 described excavator control method based on the electric-assisted supercharging device can be applied to an excavator control system based on the electric-assisted supercharging device, and the excavator control system can be applied to an excavator (e.g., a hydraulic excavator, a mechanical excavator, 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 boosting device may include the following operations:

[0086] 101. When the excavator is started, the excavator control system obtains the current operating parameters of the engine, 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 power 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 rate, required intake flow rate, 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 rate of the supercharger for supercharging the engine, and the power parameters may include: the speed parameter and torque parameter of the current engine. Furthermore, the required intake flow rate is a real-time changing value calculated by 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 engine intake flow 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, which is beneficial to improving the excavator's control efficiency and energy utilization rate of the built-in engine and supercharging device.

[0089] 102. The excavator control system determines whether the power parameters of the current engine meet the preset power conditions. When it is determined that the power parameters of the current engine meet the preset power conditions, the operation of step 103 can 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 threshold and the preset torque threshold 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 power parameters of the current engine meet the preset power conditions. When it is determined that the power parameters of the current 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, which may include:

[0092] The excavator control module in 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.

[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 flow is greater than or equal to the required intake flow.

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

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

[0096] 103. The excavator control system determines whether the actual air intake flow rate is greater than or equal to the required air intake flow rate. When it is determined that the actual air intake flow rate is greater than or equal to the required air intake 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 can generate electrical energy and store 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 electric energy and stores the electric 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 gas flow discharged by the engine, and uses the impulse generated by the excess exhaust gas 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 power storage device, thereby reducing the energy loss caused by the excess gas discharged and improving the working efficiency of the supercharging device, which is beneficial to improving the excavator's control efficiency and energy utilization rate of the built-in engine and supercharging device.

[0103] In an optional embodiment, after executing 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 boosting 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 pressurizes the engine.

[0108] The excavator control system adjusts the engine's fuel injection amount according to the target working 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, so as 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, 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 the supercharging device.

[0110] In another optional embodiment, after executing 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 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 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 pressurizes the engine.

[0114] The excavator control system adjusts the engine's fuel injection amount according to the target working 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 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 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 supply power to the electronic control modules of the excavator (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 power storage device is greater than or equal to the preset power threshold, the excavator control system controls the auxiliary motor to directly supply power to 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 stop state.

[0122] Embodiment 2

[0123] See also Figure 2 , Figure 2 It is a flow chart of an excavator control method based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 2 : 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 described excavator control method based on the electric-assisted supercharging device can be applied to an excavator control system based on the electric-assisted supercharging device, and the excavator control system can be applied to an excavator (e.g., a hydraulic excavator, a mechanical excavator, 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 boosting device may include the following operations:

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

[0125] 202. The excavator control system determines whether the power parameters of the current engine meet the preset power conditions. When it is determined that the power parameters of the current 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 at multiple preset time intervals, and calculates the load change rate of the engine at each time interval according to the speed parameters at each time interval.

[0127] In the embodiment of the present invention, the specific method of the excavator control system to calculate the load change rate of the engine at each interval according to the speed parameter at each interval can be:

[0128] The engine control module in the excavator control system constructs a speed parameter-time relationship curve based on the speed parameter in each interval, and derives the relationship curve to obtain the derivative of the relationship curve, which is the real-time speed change rate of the current engine, and determines the real-time speed change rate as the load change rate of the engine in each interval. Furthermore, the real-time speed change rate is proportional to the load change rate. When the load change rate of the engine is a positive number, it proves that the gear of the excavator is increasing and the excavator is in a loading working state; when the load change rate of the engine is a negative number, it proves that the gear of the excavator is decreasing and the excavator is in a load-reducing 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, and 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 air intake flow rate is greater than or equal to the required air intake flow rate. When it is determined that the actual air intake flow rate is greater than or equal to the required air intake 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 here.

[0134] It can be seen that the implementation of the embodiment of the present invention can calculate the load change rate of the engine at each interval according to the speed parameters at each interval after the excavator control system determines that the power parameters of the current engine meet the preset power conditions, 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 state of the excavator according to the engine load condition of the excavator, thereby intelligently adjusting the engine boost according to the real-time working state of the excavator, which is beneficial to improving the response control performance of the excavator to the built-in engine and the boost device, and 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 working parameters of the current engine when the excavator is started, and judge whether the power parameters of the current engine meet the preset power conditions. When the power parameters 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. 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 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; and when the excavator control system judges that the power parameters of the current engine meet the preset power conditions, the power parameters of the current engine meet the preset power conditions. After the condition is met, the load change rate of the engine in each interval moment is calculated according to the speed parameter in each interval moment, and it is judged whether the load rate change rate is greater than or equal to the preset load change rate threshold value. When the load rate change rate is greater than or equal to the preset load change rate threshold value, it is judged 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 state of the excavator according to the engine load condition of the excavator, thereby intelligently adjusting the engine boost according to the real-time working state of the excavator, which is beneficial to improve the response control performance of the excavator to the built-in engine and the boost device, and improve the control efficiency and energy utilization rate of the excavator to the built-in engine and the boost device.

[0136] Embodiment 3

[0137] See also Figure 3 , Figure 3 It is a structural schematic diagram of an excavator control system based on an electric auxiliary supercharging device disclosed in an embodiment of the present invention. Figure 3 : 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 auxiliary supercharging device described above can execute the excavator control method based on the electric auxiliary supercharging device, and 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 auxiliary supercharging device and a power storage device, and the electric auxiliary supercharging device can be used to perform intake supercharging on the cylinders in the engine, and the embodiments of the present invention are 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 rate, required intake flow rate and power parameters of the current engine, and the auxiliary motor is used to adjust the intake flow rate of the supercharger for engine boost.

[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 judging 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 electrical energy and stores the electrical energy 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 working parameters of the current engine when the excavator is started, and determine whether the power parameters of the current engine 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 control efficiency and energy utilization rate of the excavator for 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 power parameters of the current engine meet the preset power conditions. When it is judged that the power parameters of the current engine 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:

[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 flow is greater than or equal to the required intake 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 power parameters of the current engine meet the preset power conditions. When the power parameters of the current engine meet the preset power conditions, the actual intake flow rate is compared with the required intake flow rate to adjust the boost air flow rate of the supercharger to the engine according to the comparison result, which is beneficial to improve the control efficiency and energy utilization rate of the machine for 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 according to the first curve parameter, the second curve parameter and the required intake flow rate to obtain the target operating parameter that matches the output power required by the engine when the judgment module 302 judges 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.

[0149] The adjustment module 305 is used to adjust the working parameters of the auxiliary motor according to the target working 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 according to the first curve parameter, the second curve parameter and the required intake flow rate to obtain the target operating parameters matching the output power required by the engine when the judgment module 302 judges that the actual intake flow rate is less than the required intake flow rate.

[0151] The adjustment module 305 is further used to adjust the working parameters of the auxiliary motor according to the target working 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.

[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 assisted 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 the supercharging device.

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

[0155] The acquisition module 301 is also used 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 flow rate is greater than or equal to the required intake flow rate.

[0156] The second calculation module 306 is further used 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 judge whether the load rate change rate calculated by the second calculation module 306 is greater than or equal to the 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 judging 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 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 air flow rate is greater than or equal to the required intake air flow rate, so as to determine the real-time working state of the excavator according to the engine load condition of the excavator, thereby intelligently adjusting the engine supercharging according to the real-time working state of the excavator, which is beneficial to improving the response control performance of the excavator to the built-in engine and supercharging device, and improving the control efficiency and energy utilization rate of the excavator to the built-in engine and supercharging device.

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

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

[0161] The adjustment module 305 is further used 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 yet 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 electric energy and stores the electric energy in the power storage device in the specific manner as follows:

[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 and improving the working efficiency of the supercharging device, which is beneficial to improving the control efficiency and energy utilization rate of the excavator for the built-in engine and supercharging device.

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

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

[0169] The control module 307 is used 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 also used to control the auxiliary motor to directly supply power to the electric control module of the excavator when the judgment module 302 judges 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 assisted 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] Embodiment 4

[0175] See also Figure 5 , Figure 5 is a 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 booster 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 auxiliary supercharging device is not limited in the embodiments of the present invention.

[0176] Embodiment 5

[0177] See also Figure 6 , Figure 6FIG. 1 is a schematic diagram of another structural embodiment of an 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 booster device may include:

[0178] A memory 401 storing executable program codes;

[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 auxiliary supercharging device described in the first embodiment of the present invention or the second embodiment of the present invention.

[0181] Embodiment 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 of the present invention or the second embodiment of the present invention.

[0183] Embodiment 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 only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0186] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, a magnetic disk storage, a magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[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 solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An excavator control method based on an electric auxiliary supercharging device, applied to an excavator control system, wherein the excavator system at least includes an electric auxiliary supercharging device, characterized in that: The method comprises: When the excavator is started, the excavator control system obtains the current operating parameters of the engine, the first curve parameters and the second curve parameters of the auxiliary motor, wherein the operating parameters of the engine at least include the actual intake flow rate, the required intake flow rate and the power parameters of the current engine, and 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 power parameters of the engine meet the preset power conditions; When it is determined that the current power parameter of the engine meets the preset power condition, 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 flow rate is greater than or equal to the required intake flow rate, 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.

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 at least includes: the auxiliary motor and the supercharger, the working parameters of the engine also include: the boost pressure parameters of the engine, and the power parameters include: the current speed parameters and torque parameters of the engine; 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: The excavator control system determines whether the current speed parameter of the engine is greater than a preset speed threshold or whether the torque parameter is greater than a preset torque threshold; 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 flow rate is greater than or equal to the required intake flow rate.

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 according to the first curve parameter, the second curve parameter and the required intake air flow rate to obtain a target operating parameter that matches the output power required by the engine, and adjusts the operating parameter of the auxiliary motor according to the target operating parameter 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 flow rate is less than the required intake flow rate, the excavator control system calculates according to 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, and adjusts the operating parameter of the auxiliary motor according to the target operating parameter so that the auxiliary motor increases the intake flow rate of the supercharger for supercharging the engine; Wherein, 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 is 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 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 flow rate is greater than or equal to the required intake 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 is 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 flow discharged by the engine, and utilizes the excess exhaust gas flow to drive the auxiliary motor, so that the auxiliary motor generates electric energy and stores the electric energy in the power storage device.

7. The excavator control method based on the electric auxiliary supercharging device according to claim 1 is 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 supply power to the electronic control module of the excavator, 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, the excavator system at least comprising an electric-assisted supercharging device, characterized in that: The device comprises: An acquisition module, used for acquiring the current working parameters of the engine, the first curve parameters and the second curve parameters of the auxiliary motor when the excavator is started, wherein the working parameters of the engine at least include the actual intake flow rate, the required intake flow rate and the power parameters of the current engine, and the auxiliary motor is used for adjusting the intake flow rate of the supercharger for supercharging the engine; a judging module, configured to judge whether the power parameters of the current engine acquired by the acquiring module meet the preset power conditions; when it is judged that the power parameters of the current engine meet the preset power conditions, judge whether the actual intake flow rate is greater than or equal to the required intake flow rate; The switching module is used to switch the working mode of the auxiliary motor to the power generation mode when the judgment module judges 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 auxiliary supercharging device as described in any one of claims 1-7.

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 as described in any one of claims 1-7.

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