Equipment power control method and engineering machinery equipment

Abstract

The embodiment of the present invention discloses a device power control method and engineering machinery equipment. The method includes: obtaining working parameter information of the target engineering machinery equipment, determining the change of the initial target speed of the engine according to the load rate limit and the load rate in the working parameter information, and adjusting the power load of the target engineering machinery equipment according to the current engine speed and the change in the working parameter information, so as to control the power of the engine in the target engineering machinery equipment. In the embodiment of the present invention, the change of the initial target speed of the engine is determined by the load rate limit and the load rate in the working parameter information, thereby adjusting the power load of the target engineering machinery equipment according to the current engine speed and the change, so as to realize the adaptive adjustment of the engine output power, meet the working conditions such as heavy load, complex and compound action, and ensure the optimal efficiency, fuel consumption and working stability under any working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery equipment power control, and in particular to an equipment power control method and engineering machinery equipment. Background Art

[0002] In the prior art, the bulldozer's operating characteristics are cyclic operation. During operation, it mainly relies on the travel drive system to provide large traction. The travel drive system consumes a lot of power, and the working device system consumes a little power. The excavator's operating characteristics are fixed-point operation. During operation, the working device system mainly consumes power. The wheel loader's operating characteristics are that during operation, the working device system consumes a lot of power, and the travel drive system consumes a little power. However, for engineering machinery equipment (such as a push loader) whose travel drive system and working device system both consume a lot of power during operation, how to reasonably split and match the power to meet the combined action operation requirements of the travel and working device, and achieve the best efficiency, economy, and experience. Since the existing technical solutions are not suitable for power matching of engineering machinery equipment, a new power matching strategy and method are needed for power matching of push loaders. Summary of the invention

[0003] In view of this, the present invention provides an equipment power control method, device, electronic device, storage medium and product, which can realize adaptive adjustment of engine output power to meet the working conditions of heavy load, complex and compound actions, and can make the equipment always stable within the optimal working area under any operating conditions, ensuring the best efficiency, fuel consumption and operating stability.

[0004] According to one aspect of the present invention, an embodiment of the present invention provides a device power control method, the method comprising:

[0005] Obtaining the working parameter information of the target engineering machinery equipment;

[0006] Determining a change in an initial target speed of the engine according to a preconfigured load rate limit and the load rate in the operating parameter information;

[0007] The power load of the target engineering machinery equipment is adjusted according to the changes in the current engine speed and the initial target engine speed in the working parameter information to control the power of the engine in the target engineering machinery equipment.

[0008] According to another aspect of the present invention, an embodiment of the present invention further provides an engineering machinery device, the engineering machinery device comprising: a hand throttle, an engine controller, a main controller, a working system, a traveling system and a temperature control fan system;

[0009] Wherein, the hand throttle is connected to the main controller via a CAN bus and is used to generate an initial target speed so that the main controller can make adjustments according to the initial target speed;

[0010] The engine controller is connected to the main controller via a CAN bus, and is used to collect working parameter information of the target engineering machinery equipment when it is working, and send the working parameter information to the main controller;

[0011] The main controller is connected to the engine controller, the hand throttle, the working system, the travel system and the temperature control fan system through a CAN bus, and is used to execute the device power control method described in any one of the embodiments of the present invention;

[0012] The working system is connected to the main controller via a CAN bus and is used to feed back power consumption to the engine controller, and the engine controller recognizes real-time load changes;

[0013] The walking system is connected to the main controller via a CAN bus and is used to generate a walking pump and a motor control current;

[0014] The temperature-controlled fan system is connected to the main controller via a CAN bus and is used to generate fan pump and motor control current.

[0015] The technical solution of the embodiment of the present invention determines the change of the initial target speed of the engine through the load rate limit and the load rate in the working parameter information, thereby adjusting the power load of the target engineering machinery equipment according to the change of the current engine speed and the initial target speed of the engine in the working parameter information to control the power of the engine in the target engineering machinery equipment. It can realize adaptive adjustment of the engine output power to meet the working conditions such as heavy load, complex and compound actions, and can keep the equipment stable within the optimal working area under any working conditions, ensuring optimal efficiency, fuel consumption and operating stability.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A flow chart of a device power control method provided by an embodiment of the present invention;

[0019] Figure 2 A flowchart of another device power control method provided by an embodiment of the present invention;

[0020] Figure 3 A real-time matching change relationship diagram of a change in an initial target speed of an engine and a change in a turnaround value of an engine provided by an embodiment of the present invention;

[0021] Figure 4 A structural block diagram of an engineering machinery equipment provided by an embodiment of the present invention;

[0022] Figure 5 A structural block diagram of another engineering machinery equipment provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] 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 should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0026] In one embodiment, Figure 1 This is a flow chart of a device power control method provided by an embodiment of the present invention. This embodiment is applicable to the situation when matching and controlling the engine power load in engineering machinery equipment. The method can be executed by a main controller in the engineering machinery equipment.

[0027] like Figure 1 As shown, the specific steps of the method include:

[0028] S110, obtaining working parameter information of target engineering machinery equipment.

[0029] The target engineering machinery equipment refers to the engineering machinery equipment in working state. The working parameter information can be understood as the parameter information generated by the target engineering machinery equipment in working state.

[0030] In some embodiments, the working parameter information of the target engineering machinery equipment may include but is not limited to the load rate of the engine, the current speed of the engine, the initial target speed of the engine, the fan pump and motor control current, the travel pump and motor control current. Of course, the load rate of the engine is the real-time load rate of the engine, the current speed of the engine is the current speed generated by the engine in real time, and the initial target speed of the engine can be understood as the initial target speed corresponding to the engine set by the hand throttle. Generally speaking, the hand throttle is set at a certain speed, and the speed can be used as the initial target speed of the engine. It should be noted that the initial target speed of the engine can be set manually or according to experience, etc., and this embodiment is not limited here. Exemplarily, the initial target speed of the engine is set to 1900r / S (revolutions / second), or it can be set to 1800r / S (revolutions / second).

[0031] In this embodiment, when the target engineering machinery equipment is in a working state, the main controller in the target engineering machinery equipment can obtain the initial target engine speed set by the hand throttle, the engine load rate and the current engine speed of the target engineering machinery equipment when it is working, collected by the engine controller, the travel pump and motor control current generated by the travel system, and the fan pump and motor control current generated by the temperature control fan system, etc., and use them as the working parameter information of the target engineering machinery equipment to analyze the power changes of the engine through the relevant parameter information under the working state.

[0032] S120: Determine a change in an initial target speed of the engine according to a preconfigured load rate limit and the load rate in the working parameter information.

[0033] The load rate limit is a preconfigured load rate limit, and the number of the preconfigured load rate limit settings is one or more. In the case of multiple preconfigured load rate limits, each preconfigured load rate limit has a large-small relationship.

[0034] In this embodiment, the change of the initial target speed of the engine may include: an increase in the initial target speed of the engine or a decrease in the initial target speed of the engine. It can be understood that when the load rate of the engine reaches one or more preconfigured load rate limits, the initial target speed of the engine increases; when the load rate of the engine is lower than one or more preconfigured load rate limits, the initial target speed of the engine decreases.

[0035] In this embodiment, one or more preconfigured load rate limits are determined, and the change in the initial target speed of the engine is determined by using one or more preconfigured load rate limits and the load rate in the working parameter information of the target engineering machinery equipment. In some embodiments, the load rate in the working parameter information can be matched and compared with one or more preconfigured load rate limits. When the load rate is greater than or equal to one or at least two of the preconfigured load rate limits, the change in the initial target speed of the engine is determined to be an increase in the initial target speed of the engine; when the load rate is less than one or at least two of the preconfigured load rate limits, the change in the initial target speed of the engine is determined to be a decrease in the initial target speed of the engine. In other embodiments, the change in the initial target speed of the engine can also be determined based on the combustion target idle speed corresponding to the combustion control request when the engine is idling, and the load target idle speed corresponding to the load control request of the vehicle parts.

[0036] S130. Adjust the power load of the target engineering machinery equipment according to the changes in the current engine speed and the initial target engine speed in the working parameter information to control the power of the engine in the target engineering machinery equipment.

[0037] The current engine speed refers to the real-time current engine speed when the engine is in working condition.

[0038] In this embodiment, the change of the engine turn-around value can be determined based on the change of the initial target speed of the engine, wherein the change of the initial target speed of the engine can include: the initial target speed increases, the initial target speed decreases, and the change of the engine turn-around value can include: the engine turn-around value decreases, the engine turn-around value increases, which can be understood as, when the initial target speed of the engine increases, the engine turn-around value also increases; when the engine target speed decreases, the engine turn-around value also decreases. In some embodiments of the present invention, based on the change of the engine turn-around value, the pre-configured engine turn-around value threshold is adjusted to obtain the adjusted engine turn-around value threshold, and the power load of the target engineering machinery equipment can be adjusted based on the change of the initial target speed of the engine, the pre-configured priority level, the current engine speed and the adjusted engine turn-around value threshold to control the power of the engine in the target engineering machinery equipment. It should be noted that the number of pre-configured engine turn-around value thresholds is one or more. When there are multiple engine turn-around value thresholds, each engine turn-around value threshold is set with a size difference to distinguish the power adjustment according to the pre-configured priority under different engine turn-around value thresholds.

[0039] The technical solution of the embodiment of the present invention determines the change of the initial target speed of the engine through the load rate limit and the load rate and initial target speed in the working parameter information, thereby adjusting the power load of the target engineering machinery equipment according to the current engine speed and the change in the working parameter information, and can realize adaptive adjustment of the engine output power to meet the working conditions such as heavy load, complex and compound actions. Under any working conditions, the equipment can always be stable within the optimal working area to ensure optimal efficiency, fuel consumption and operating stability.

[0040] In one embodiment, Figure 2 A flow chart of another equipment power control method provided for an embodiment of the present invention. Based on the above embodiments, this embodiment further refines the determination of changes in the initial target speed of the engine according to the preconfigured load rate limit and the load rate and initial target speed in the working parameter information, and the adjustment of the power load of the target engineering machinery equipment according to the current engine speed and changes in the working parameter information.

[0041] like Figure 2 As shown, the device power control method in this embodiment may specifically include the following steps:

[0042] S210: Obtain operating parameter information of target engineering machinery equipment.

[0043] S220. Determine a first load rate limit value, a second load rate limit value, and a third load rate limit value, and use the first load rate limit value, the second load rate limit value, and the third load rate limit value as preconfigured load rate limit values.

[0044] The first load rate limit value may be understood as the first pre-configured load rate limit value setting value corresponding to the load rate of the engine, the second load rate limit value may be understood as the second pre-configured load rate limit value setting value corresponding to the load rate of the engine, and the third load rate limit value may be understood as the third pre-configured load rate limit value setting value corresponding to the load rate of the engine. In this embodiment, the first load rate limit value is less than the second load rate limit value and less than the third load rate limit value.

[0045] In this embodiment, the first load rate limit, the second load rate limit and the third load rate limit corresponding to the load rate limit can be determined, and the first load rate limit, the second load rate limit and the third load rate limit can be used as pre-configured load rate limits. The first load rate limit, the second load rate limit and the third load rate limit can be set manually or by experimental experience. It should be noted that in the embodiment of the present invention, the size relationship between the first load rate limit, the second load rate limit and the third load rate limit is: the first load rate limit is less than the second load rate limit and less than the third load rate limit. Exemplarily, the first load rate limit is set to 82%, the second load rate limit is set to 85%, and the third load rate limit is set to 95%.

[0046] S230. Determine a change in an initial target speed of the engine based on the load rate, the first load rate limit, the second load rate limit, and the third load rate limit, wherein the change in the initial target speed of the engine includes one of the following: an increase in the initial target speed, a decrease in the initial target speed.

[0047] In this embodiment, the change of the initial target speed of the engine can be determined by the real-time load rate of the engine, and the pre-configured first load rate limit, second load rate limit and third load rate limit. Of course, the change can include: the initial target speed of the engine increases and the initial target speed of the engine decreases. Specifically, the load rate can be compared with the first load rate limit, the second load rate limit and the third load rate limit respectively; when the load rate is greater than or equal to one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, the change of the initial target speed of the engine is determined to be an increase in the initial target speed of the engine; when the load rate is less than one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, the change of the initial target speed of the engine is determined to be a decrease in the initial target speed of the engine.

[0048] In one embodiment, determining a change in the initial target speed of the engine according to the load rate, the first load rate limit value, the second load rate limit value, and the third load rate limit value includes:

[0049] comparing the load factor with a first load factor limit value, a second load factor limit value, and a third load factor limit value respectively;

[0050] When the load rate is greater than or equal to one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, determining that the change in the initial target speed of the engine is an increase in the initial target speed of the engine;

[0051] When the load rate is less than one or at least two of the first load rate limit value, the second load rate limit value and the third load rate limit value, it is determined that the change in the initial target speed of the engine is a decrease in the initial target speed of the engine.

[0052] In this embodiment, the load rate is compared with the first load rate limit, the second load rate limit and the third load rate limit respectively. When the load rate is greater than or equal to one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, it can be determined that the change in the initial target speed of the engine is an increase in the initial target speed of the engine; when the load rate is less than one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, it can be determined that the change in the initial target speed of the engine is a decrease in the initial target speed of the engine. Specifically, the increase in the initial target speed of the engine can be determined based on the load rate limit reached by the engine load rate, and the decrease in the initial target speed of the engine can be determined based on the load rate limit to which the engine load rate drops back. It can be understood that when the engine load rate reaches the first load rate limit, the initial target speed of the engine increases for the first time, when the engine load rate reaches the second load rate limit, the initial target speed of the engine increases for the second time, when the engine load rate reaches the first load rate limit, the initial target speed of the engine increases for the first time, when the engine load rate reaches the third load rate limit, the initial target speed of the engine increases for the third time. The same logic applies when the engine load rate drops back, and this embodiment will not be elaborated in detail herein.

[0053] In one embodiment, when the load rate is greater than or equal to one or at least two of the first load rate limit, the second load rate limit, and the third load rate limit, determining that the change in the initial target speed of the engine is an increase in the initial target speed of the engine includes:

[0054] When the load rate reaches the first load rate limit, the initial target speed of the engine is increased for the first time, the initial target speed of the engine is used as the first target speed, and the increase value of the first target speed is recorded as the first increase value;

[0055] When the load rate reaches the second load rate limit, the first target speed is increased based on the first increase value, and the increased first target speed is used as the second target speed, and the increase value of the second target speed is recorded as the second increase value;

[0056] When the load rate reaches the third load rate limit, the second target speed is increased on the basis of the second increase value, and the increase value corresponding to the increased second target speed is recorded as the third increase value.

[0057] The first target speed refers to the target speed of the engine corresponding to the first increase in the initial target speed of the engine. The first increase value refers to the increase value corresponding to the first target speed. The second target speed refers to the target speed generated by increasing the target speed of the engine again on the basis of the first increase value. The second increase value refers to the increase value corresponding to the second target speed. The third increase value refers to the increase value corresponding to the second target speed added on the basis of the second increase value as the third increase value.

[0058] In this embodiment, when the load rate reaches the first load rate limit, active intervention control of power is started, that is, the initial target speed of the engine and the power of the engine are actively increased, the initial target speed of the engine is increased for the first time, the initial target speed of the engine is used as the first target speed, and the increase in the first target speed is recorded as the first increase; when the load rate reaches the second load rate limit, the first target speed is increased on the basis of the first increase, and the increased first target speed is used as the second target speed, and the increase in the second target speed is recorded as the second increase; when the load rate reaches the third load rate limit, the second target speed is increased on the basis of the second increase, and the increase corresponding to the increased second target speed is used as the third increase, wherein the first load rate limit is less than the second load rate limit and less than the third load rate limit.

[0059] It should be noted that, when the load rate is less than one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, the change in the initial target speed of the engine is determined as the specific manner in which the initial target speed of the engine is reduced is similar to the manner in which the initial target speed of the engine is increased, and this embodiment will not be further explained.

[0060] Exemplarily, the first load rate limit, the second load rate limit and the third load rate limit are set to 82%, 85% and 95% respectively. If the real-time load rate of the engine exceeds 82%, the active intervention control power is started, that is, the initial target speed of the engine and the target power of the engine are actively increased for the first time. When the real-time load rate of the engine reaches 85%, the initial target speed of the engine and the target power of the engine are increased for the second time on the basis of the first increase in the initial target speed of the engine. When the real-time load rate of the engine reaches 95%, it is considered that a limit value has been reached. On the basis of the second increase in the initial target speed of the engine, the initial target speed of the engine and the target power of the engine are continued to be increased. It can be understood that each increase in the initial target speed of the engine and the target power of the engine indicates that a new target speed of the engine and the target power of the engine are generated, and each new target speed of the engine and the target power of the engine correspond to a corresponding engine turn value increase, that is, the change curve corresponding to each new target speed of the engine and the engine turn value increase is a real-time matching and fitting change.

[0061] In this embodiment, in order to better understand the relationship between the preconfigured load rate limit and the initial target speed increase of the engine, Table 1 is a relationship table between a preconfigured load rate limit and the initial target speed increase of the engine provided by an embodiment of the present invention. As shown in Table 1, each preconfigured load rate limit corresponds to a corresponding new target speed increase of the engine. Among them, L1 is the first load rate limit, L2 is the second load rate limit, and L3 is the third load rate limit, +x1 is the increase corresponding to the first increase in the initial target speed of the engine, +x2 is the increase corresponding to the second increase in the initial target speed of the engine, and +x3 is the increase corresponding to the third increase in the initial target speed of the engine.

[0062] Table 1: Relationship between a pre-configured load rate limit and the initial target engine speed increase

[0063] Preconfigured load factor limits New engine target speed increase L1 +x1 L2 +x2 L3 +x3

[0064] S240. Determine a change in the engine turnaround value according to a change in the initial target speed of the engine; wherein the change in the engine turnaround value includes at least one of the following: a decrease in the engine turnaround value and an increase in the engine turnaround value.

[0065] The engine droop value may also be referred to as the engine anti-stall Droop value, and a change in the engine droop value includes at least one of the following: a decrease in the engine droop value and an increase in the engine droop value.

[0066] In this embodiment, the change of the initial target speed of the engine can be determined by whether the initial target speed increases or decreases, so as to determine whether the change of the engine turnaround value is a decrease in the engine turnaround value or an increase in the engine turnaround value. It can be understood that when the initial target speed of the engine increases, the engine turnaround value also increases, and when the initial target speed of the engine decreases, the engine turnaround value also decreases, that is, the anti-stall Droop value curve is matched and fitted in real time according to each increase or decrease in the initial target speed of the engine. When the initial target speed of the engine increases, the anti-stall Droop value increases accordingly, and different increase values ​​correspond to different anti-stall Droop value increase values; when the target speed of the engine decreases, the anti-stall Droop value decreases accordingly.

[0067] In this embodiment, in order to better understand the relationship between the change of the initial target speed of the engine and the change of the engine turn-around value, Table 2 is a relationship table between the change of the initial target speed of the engine and the change of the engine turn-around value provided by an embodiment of the present invention. Figure 3 A real-time matching relationship diagram of the change of the initial target speed of the engine and the change of the engine turn-around value provided by an embodiment of the present invention. As can be seen from Table 2, when the initial target speed of the engine increases, the anti-stall Droop value increases accordingly, and different increase values ​​(+x1 / x2 / x3) correspond to different anti-stall Droop value increase values ​​(+d1 / d2 / d3); when the engine target speed drops back, the anti-stall Droop value decreases accordingly.

[0068] Table 2: Relationship between the change of the initial target engine speed and the change of the engine turn-around value

[0069]

[0070] S250. Adjust the pre-configured engine turn-around value threshold according to the change of the engine turn-around value to obtain an adjusted engine turn-around value threshold, wherein the adjusted engine turn-around value threshold includes at least: a first engine turn-around value threshold and a second engine turn-around value threshold.

[0071] Among them, the first engine turn-around value threshold can be understood as the first engine turn-around value threshold corresponding to the engine turn-around value after adjustment according to the change of the engine turn-around value. The second engine turn-around value threshold can be understood as the second engine turn-around value threshold corresponding to the engine turn-around value after adjustment according to the change of the engine turn-around value. It should be noted that the first engine turn-around value threshold is less than the second engine turn-around value threshold. In this embodiment, the engine turn-around value threshold is an engine turn-around value threshold that is artificially pre-configured.

[0072] In this embodiment, the pre-configured engine turn-around value threshold can be adjusted according to the change of the engine turn-around value to obtain the adjusted engine turn-around value threshold. It can be understood that the pre-configured engine turn-around value threshold can change with the change of the engine turn-around value. In this embodiment, the number of pre-configured engine turn-around value thresholds can be one or more, and accordingly, the adjusted engine turn-around value threshold at least includes: a first engine turn-around value threshold and a second engine turn-around value threshold.

[0073] For example, in order to better understand the change of the pre-configured engine turn-around value threshold along with the engine turn-around value, Table 3 is a change relationship of the pre-configured engine turn-around value threshold along with the engine turn-around value provided by an embodiment of the present invention. Among them, n1 represents the change of the adjusted pre-configured first threshold value, and n2 represents the change of the adjusted pre-configured second threshold value.

[0074]

[0075] S260, adjusting the power load of the target engineering machinery equipment according to the change of the initial target engine speed, the pre-configured priority level, the current engine speed and the adjusted engine turn-around value threshold to control the power of the engine in the target engineering machinery equipment.

[0076] The priority level refers to the priority level of the working system, the traveling system and the temperature control fan system in the target engineering machinery equipment, and the priority level is pre-configured.

[0077] In this embodiment, the power load of the target engineering machinery equipment can be adjusted according to the change of the initial target speed of the engine, the priority level of the working system, the travel system and the temperature control fan system in the pre-configured target engineering machinery equipment, the current speed of the engine and the adjusted engine turn-around value threshold, so as to control the power of the engine in the target engineering machinery equipment. Specifically, by determining the difference between the target speed corresponding to the increase or decrease of the initial target speed and the current speed of the engine, according to the comparison result of the difference and the first engine turn-around value threshold, and the priority level of the working system, the travel system and the temperature control fan system in the pre-configured target engineering machinery equipment, the power load of the target engineering machinery equipment is adjusted to control the power of the engine in the target engineering machinery equipment.

[0078] In one embodiment, the power load of the target engineering machinery equipment is adjusted according to the change of the initial target engine speed, the pre-configured priority level, the current engine speed and the adjusted engine turn-around value threshold, including:

[0079] Determine the priority ranking among the working system, the traveling system and the temperature control fan system in the target engineering machinery equipment, and use the priority ranking as a pre-configured priority level; wherein the priority ranking is that the working system is greater than the traveling system and greater than the temperature control fan system;

[0080] Determine the difference between the target speed corresponding to the initial target speed increase or decrease and the current speed of the engine;

[0081] When the difference is less than the first engine turn-around value threshold, the current of the travel pump and the travel motor in the travel system is kept unchanged;

[0082] When the difference is greater than or equal to the first engine turnaround value threshold, the current of the travel pump and the travel motor in the travel system begins to be reduced according to the priority order, so as to reduce the power consumption of the travel system and adjust the power load of the target engineering machinery equipment;

[0083] When the difference is greater than or equal to the second engine turn-around value threshold, the fan pump and motor control current in the temperature control fan system are reduced according to priority to reduce the power consumption of the temperature control fan system, and the power load of the target engineering machinery equipment is adjusted, wherein the first engine turn-around value threshold is less than the second engine turn-around value threshold.

[0084] In this embodiment, the priority ranking among the working system, the walking system and the temperature control fan system in the target engineering machinery equipment is determined, and the priority ranking is used as a preconfigured priority level; wherein, the priority ranking is that the working system is greater than the walking system and greater than the temperature control fan system, and the difference between the target speed corresponding to the initial target speed increase or decrease and the current speed of the engine is determined, and when the difference is less than the first engine turn-around value threshold, the current of the walking pump and the walking motor in the walking system is kept unchanged; when the difference is greater than or equal to the first engine turn-around value threshold, the current of the walking pump and the walking motor in the walking system begins to be reduced according to the priority ranking to reduce the power consumption of the walking system, and the power load of the target engineering machinery equipment is adjusted; when the difference is greater than or equal to the second engine turn-around value threshold, the fan pump and motor control current in the temperature control fan system are reduced according to the priority ranking to reduce the power consumption of the temperature control fan system, and the power load of the target engineering machinery equipment is adjusted, wherein the first engine turn-around value threshold is less than the second engine turn-around value threshold.

[0085] It should be noted that when the walking pump and walking motor currents in the walking system are reduced according to priority to reduce the power consumption of the walking system, or when the fan pump and motor control currents in the temperature control fan system are reduced according to priority to reduce the power consumption of the temperature control fan system, it is necessary to set a minimum limit for the reduction value of the walking pump and walking motor currents in the walking system to improve the system responsiveness and ensure the output efficiency under heavy impact loads; and setting a minimum limit for the reduction value of the fan pump and motor control currents in the temperature control fan system can ensure that the basic heat dissipation power requirements are met while the power requirements of the working system are met.

[0086] In some embodiments, a first drop limit threshold is set for the drop value of the travel pump and travel motor current in the travel system, and a second drop limit threshold is set for the drop value of the fan pump and motor control current in the temperature control fan system.

[0087] The first drop limit threshold refers to the lowest drop threshold of the current reduction of the travel pump and the travel motor in the travel system, and the second drop limit threshold refers to the lowest drop threshold of the current reduction of the fan pump and the motor in the temperature control fan system.

[0088] In this embodiment, a first drop value limit threshold is set for the drop value of the current reduction of the walking pump and the walking motor in the walking system, and a second drop value limit threshold is set for the drop value of the fan pump and the motor control current reduction in the temperature control fan system, so as to improve the system responsiveness and ensure the output efficiency under heavy impact load. At the same time, it can ensure that the basic heat dissipation power requirement is met while meeting the power requirement of the working system.

[0089] The above-mentioned technical scheme of the embodiment of the present invention determines the first load rate limit, the second load rate limit and the third load rate limit of the load rate limit, and uses the first load rate limit, the second load rate limit and the third load rate limit as the preconfigured load rate limit, and determines the change of the initial target speed of the engine according to the load rate, the first load rate limit, the second load rate limit and the third load rate limit, determines the change of the engine turn-around value according to the change, and adjusts the preconfigured engine turn-around value threshold according to the change of the engine turn-around value to obtain the adjusted engine turn-around value threshold, and adjusts the power load of the target engineering machinery equipment according to the change of the initial target speed of the engine, the preconfigured priority level, the current engine speed and the adjusted engine turn-around value threshold, further realizes the adaptive adjustment of the engine output power, meets the working conditions such as heavy load complexity and compound action, and can make the equipment always stable within the optimal working area under any working conditions, to ensure the optimal efficiency, fuel consumption and operation stability.

[0090] In one embodiment, in order to facilitate a better understanding of the device power control method, this embodiment can be used as a preferred embodiment to further illustrate the device power control method. The Droop value in this embodiment is the engine turn-around value in the above embodiment, the minimum displacement limit p1 is represented by the first drop value limit threshold in the above embodiment, the minimum displacement limit p2 is represented by the second drop value limit threshold in the above embodiment, n1 is represented by the first engine turn-around value threshold in the above embodiment, and n2 is represented by the second engine turn-around value threshold in the above embodiment.

[0091] In this embodiment, the power matching control method of the hydrostatic drive crawler bulldozer is a full-power passive matching technology for travel, that is, the target engine speed and power are fixed. When the workload increases, the engine speed decreases. When the engine speed drops below the Droop curve, the travel pump and travel motor control current are adjusted in real time according to the engine rotation situation, so that the engine and travel drive hydraulic system are always stable within the optimal working range.

[0092] In the embodiment of the present invention, active power matching control is performed based on the real-time operating load, and corresponding system priorities are set to perform priority matching control. This is a power control method proposed for engineering machinery equipment (such as a push loader) whose walking system and working system both consume large power during operation. The specific scheme is as follows:

[0093] a1. Introduce the real-time load rate of the engine to participate in the power matching control. When the real-time load rate is greater than the pre-configured load rate limit (the first load rate limit, the second load rate limit and the third load rate limit), the initial target speed and target power of the engine are actively controlled to increase, and the engine speed increase value and power increase value corresponding to different pre-configured load rate limits (the first load rate limit, the second load rate limit and the third load rate limit) are different; when the real-time load rate is lower than the pre-configured load rate limit (the first load rate limit, the second load rate limit and the third load rate limit), the initial target speed and target power of the engine are actively controlled to decrease to achieve power adaptation, and determine the optimal relationship between the pre-configured load rate limit (the first load rate limit, the second load rate limit and the third load rate limit) and the initial target speed of the engine, so as to form an optimal change curve to meet the working conditions such as heavy load, complex and compound actions;

[0094] a2. Real-time matching change of anti-stall Droop curve: According to each increase or decrease of the initial engine target speed, the anti-stall Droop value curve is matched and fitted in real time, that is, when the initial target engine speed increases, the anti-stall Droop value increases accordingly, and different increase values ​​(+x1 / x2 / x3) correspond to different anti-stall Droop value increase values ​​(+d1 / d2 / d3); when the initial target engine speed decreases, the anti-stall Droop value decreases accordingly, so that the engine and travel drive hydraulic system are always stable within the optimal working range, ensuring the optimal efficiency, fuel consumption and operation stability;

[0095] a3. Perform hierarchical control on the power consumption of the working system, walking system and temperature control fan system, and set the pre-configured priority level as: working system > walking system > temperature control fan system. When the overall power demand is large or encounters impact loads, the power demand of the working system is prioritized; when the power demand of the working system is large, the power consumption of the walking system is reduced first. If it still cannot meet the power demand of the working system, the power consumption of the temperature control fan is reduced. It can be understood that as the power demand of the working system increases, the power consumption of the walking system is reduced first, and then the power consumption of the temperature control fan is reduced.

[0096] In this embodiment, according to the change of the engine turn-around value, the pre-configured engine turn-around value threshold can be adjusted to obtain the adjusted engine turn-around value threshold. And the judgment basis for reducing the power consumption of the travel system and the fan system is the engine turn-around value. When the engine turn-around value (the initial target speed of increase or decrease - the current engine speed) is ≥ n1, the travel pump and the travel motor current begin to be reduced, that is, the displacement of the travel system is reduced, and its power consumption is reduced. The larger the engine turn-around value, the more the travel pump and the travel motor current are reduced; when the engine turn-around value is ≥ n2 (n2>n1), the temperature control fan control current begins to be reduced, that is, the displacement of the temperature control fan system is reduced, and its power consumption is reduced. The larger the engine turn-around value, the more the temperature control fan control current is reduced.

[0097] It should be noted that when reducing the current of the travel pump and travel motor, and reducing the control current of the temperature control fan, it is necessary to set the minimum displacement limit of the travel hydraulic system pump p1, and set the minimum displacement limit of the temperature control fan system p2. When the equipment is subjected to impact loads or the power demand of the working system is large, the engine speed decreases, and the displacement of the travel pump is adjusted in real time according to the engine rotation situation, but the minimum displacement of the travel pump does not exceed p1, so as to improve the responsiveness of the system and ensure the output efficiency under heavy impact loads; set the minimum displacement limit of the temperature control fan system p2. When the equipment is subjected to impact loads or the power demand of the working system is large, the engine speed decreases, and the displacement of the temperature control fan system is adjusted in real time according to the engine rotation situation, but the minimum displacement of the fan system does not exceed p2, so as to ensure the basic heat dissipation power demand while meeting the power demand of the working system.

[0098] a4. Adjust the power load of the target engineering machinery equipment according to the change of the initial target engine speed, the pre-configured priority level, the current engine speed and the adjusted engine turn-around value threshold to control the power of the engine in the target engineering machinery equipment.

[0099] In one embodiment, Figure 4 A structural block diagram of an engineering machinery device provided by an embodiment of the present invention, such as Figure 5 As shown, the engineering machinery equipment includes: a hand throttle 410, an engine controller 420, a main controller 430, a working system 440, a walking system 450 and a temperature control fan system 460;

[0100] The hand throttle 410 is connected to the main controller 430 via a CAN bus and is used to generate an initial target speed so that the main controller 430 can adjust according to the initial target speed;

[0101] The engine controller 420 is connected to the main controller 430 via a CAN bus, and is used to collect working parameter information of the target engineering machinery equipment when it is working, and send the working parameter information to the main controller 430;

[0102] The main controller 430 is connected to the engine controller 420, the hand throttle 410, the working system 440, the travel system 450 and the temperature control fan system 460 through a CAN bus, and is used to execute the device power control method described in any one of the real-time examples of the present invention;

[0103] The working system 450 is connected to the main controller 430 via a CAN bus, and is used to feed back the power consumption to the engine controller 420, and the engine controller 420 recognizes the real-time load change;

[0104] The travel system 450 is connected to the main controller 430 via a CAN bus and is used to generate travel pump and motor control current;

[0105] The temperature control fan system 460 is connected to the main controller 430 via a CAN bus, and is used to generate fan pump and motor control current.

[0106] In one embodiment, the travel system 450 includes a travel pump and a travel solenoid valve, as well as a travel pump and a motor speed sensor, the temperature control fan system 460 includes a fan pump and a motor solenoid valve, and the electronically controlled engine controller is equipped with an electronic control unit.

[0107] In this embodiment, the engineering machinery equipment can be an engineering machinery equipment whose travel drive system and working device system both consume relatively large power during operation. For example, the engineering machinery equipment is a hydrostatic drive push loader: it adopts a crawler chassis, the power system is rear-placed, the travel system and the working system are both hydraulically driven, and the front is equipped with a working device that integrates pushing, loading, digging, and transporting functions.

[0108] In one embodiment, Figure 5 A structural block diagram of another engineering machinery equipment provided by an embodiment of the present invention is as follows: Figure 5 As shown, the engineering machinery equipment includes: a hand throttle 510, an engine controller 520, a main controller 530, a travel motor speed sensor 540, a fan pump and motor solenoid valve 550 and a travel pump and travel motor solenoid valve 560. The hydrostatic drive push loader adopts an electronically controlled engine 520, and the electronically controlled engine 520 is equipped with an electronic control unit; the hydrostatic drive push loader is provided with a main controller 530 (programmable controller) for collecting parameter information such as the travel handle, the target speed of the hand throttle, the travel pump and motor control current, the travel motor speed sensor, the fan pump and motor control current, and the load rate of the engine electronic control unit, the real-time engine speed and other information, and according to these parameter information, active power matching and priority matching are performed, and the power is controlled by a preset control strategy, so as to realize active power matching, real-time matching change control of the anti-stall Droop curve, priority power matching control and anti-stall low-speed bottoming control and other control strategies. The various parts communicate with each other through the CAN bus, such as Figure 5 shown.

[0109] Among them, the main controller 530 (programmable controller) uses a type of programmable memory for internal storage of programs, executes user-oriented instructions such as logical operations, sequential control, timing, counting and arithmetic operations, and controls various types of machinery or production processes through digital or analog input / output. Its essence is a computer dedicated to industrial control. Engine electronic control unit: The electronic control unit of the electronically controlled engine completes the collection of various engine parameters and the control of fuel injection quantity and injection timing.

[0110] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0111] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device power control method, characterized in that: include: Obtaining the working parameter information of the target engineering machinery equipment; Determining a change in an initial target speed of the engine according to a preconfigured load rate limit and the load rate in the operating parameter information; Adjusting the power load of the target engineering machinery equipment according to the changes in the current engine speed and the initial target engine speed in the working parameter information to control the power of the engine in the target engineering machinery equipment; Wherein, the determining of the change of the initial target speed of the engine according to the preconfigured load rate limit and the load rate in the working parameter information includes: Determining a first load rate limit value, a second load rate limit value, and a third load rate limit value of the load rate limit value, and using the first load rate limit value, the second load rate limit value, and the third load rate limit value as the preconfigured load rate limit values, wherein the first load rate limit value is less than the second load rate limit value, which is less than the third load rate limit value; The change of the initial target speed of the engine is determined based on the load rate, the first load rate limit, the second load rate limit and the third load rate limit, wherein the change of the initial target speed of the engine includes one of the following: an increase in the initial target speed and a decrease in the initial target speed.

2. The method according to claim 1, characterized in that The determining of the change of the initial target speed of the engine according to the load rate, the first load rate limit value, the second load rate limit value and the third load rate limit value comprises: comparing the load factor with the first load factor limit value, the second load factor limit value, and the third load factor limit value respectively; When the load rate is greater than or equal to one or at least two of the first load rate limit value, the second load rate limit value and the third load rate limit value, determining that the change of the initial target speed of the engine is an increase in the initial target speed of the engine; When the load rate is less than one or at least two of the first load rate limit, the second load rate limit and the third load rate limit, it is determined that the change in the initial target speed of the engine is a decrease in the initial target speed of the engine.

3. The method according to claim 2, characterized in that When the load rate is greater than or equal to one or at least two of the first load rate limit value, the second load rate limit value, and the third load rate limit value, determining that the change in the initial target speed of the engine is an increase in the initial target speed of the engine includes: When the load rate reaches the first load rate limit, increasing the initial target speed of the engine for the first time, taking the initial target speed of the engine as the first target speed, and recording the increase value of the first target speed as the first increase value; When the load rate reaches the second load rate limit, the first target speed is increased based on the first increase value, and the increased first target speed is used as the second target speed, and the increase value of the second target speed is recorded as the second increase value; When the load rate reaches the third load rate limit, the second target speed is increased based on the second increase value, and the increase value corresponding to the increased second target speed is recorded as the third increase value.

4. The method according to claim 1, characterized in that: The adjusting the power load of the target engineering machinery equipment according to the change of the current engine speed and the initial target engine speed in the working parameter information includes: Determining the change of the engine turnaround value according to the change of the initial target speed of the engine; wherein the change of the engine turnaround value includes at least one of the following: the engine turnaround value decreases, the engine turnaround value increases; Adjusting the pre-configured engine turn-around value threshold according to the change of the engine turn-around value to obtain an adjusted engine turn-around value threshold, wherein the adjusted engine turn-around value threshold at least includes: a first engine turn-around value threshold and a second engine turn-around value threshold; The power load of the target engineering machinery equipment is adjusted according to the change of the initial target speed of the engine, the pre-configured priority level, the current speed of the engine and the adjusted engine turn-around value threshold.

5. The method according to claim 4, characterized in that The power load of the target engineering machinery equipment is adjusted according to the change of the initial target speed of the engine, the pre-configured priority level, the current speed of the engine and the adjusted engine turn-around value threshold, including: Determine the priority ranking among the working system, the traveling system and the temperature control fan system in the target engineering machinery equipment, and use the priority ranking as a pre-configured priority level; wherein the priority ranking is that the working system is greater than the traveling system and greater than the temperature control fan system; Determine the difference between the target speed corresponding to the increase or decrease of the initial target speed and the current speed of the engine; When the difference is less than the first engine turnaround value threshold, the current of the travel pump and the travel motor in the travel system are kept unchanged; When the difference is greater than or equal to the first engine turnaround value threshold, the current of the travel pump and the travel motor in the travel system begins to be reduced according to the priority order, so as to reduce the power consumption of the travel system and adjust the power load of the target engineering machinery equipment; When the difference is greater than or equal to the second engine turn-around value threshold, the fan pump and motor control current in the temperature control fan system are reduced according to the priority sorting to reduce the power consumption of the temperature control fan system, and the power load of the target engineering machinery equipment is adjusted, wherein the first engine turn-around value threshold is less than the second engine turn-around value threshold.

6. The method according to claim 5, characterized in that A first drop value limit threshold is set for the drop value of the current reduction of the walking pump and the walking motor in the walking system, and a second drop value limit threshold is set for the drop value of the control current reduction of the fan pump and the motor in the temperature control fan system.

7. The method according to claim 1, characterized in that The working parameter information includes at least: the load rate of the engine, the current engine speed, the initial target engine speed, the fan pump and motor control current, and the travel pump and motor control current.

8. An engineering machinery equipment, characterized in that: The engineering machinery equipment includes: a hand throttle, an engine controller, a main controller, a working system, a travel system and a temperature-controlled fan system; Wherein, the hand throttle is connected to the main controller via a CAN bus and is used to generate an initial target speed so that the main controller can make adjustments according to the initial target speed; The engine controller is connected to the main controller via a CAN bus, and is used to collect working parameter information of the target engineering machinery equipment when it is working, and send the working parameter information to the main controller; The main controller is connected to the engine controller, the hand throttle, the working system, the travel system and the temperature control fan system through a CAN bus, and is used to execute the device power control method according to any one of claims 1 to 7; The working system is connected to the main controller via a CAN bus and is used to feed back power consumption to the engine controller, and the engine controller recognizes real-time load changes; The walking system is connected to the main controller via a CAN bus and is used to generate a walking pump and a motor control current; The temperature-controlled fan system is connected to the main controller via a CAN bus and is used to generate fan pump and motor control current.

9. The engineering machinery equipment according to claim 8, characterized in that: The travel system includes a travel pump and a travel solenoid valve, as well as a travel pump and a motor speed sensor. The temperature control fan system includes a fan pump and a motor solenoid valve. The engine controller is equipped with an electronic control unit.

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