CN115324149B - Hydraulic pump control method and device and working machine - Google Patents
Hydraulic pump control method and device and working machine Download PDFInfo
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- CN115324149B CN115324149B CN202210771405.XA CN202210771405A CN115324149B CN 115324149 B CN115324149 B CN 115324149B CN 202210771405 A CN202210771405 A CN 202210771405A CN 115324149 B CN115324149 B CN 115324149B
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004590 computer program Methods 0.000 claims description 9
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- 230000008569 process Effects 0.000 abstract description 8
- 239000000779 smoke Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000012827 research and development Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 9
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
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- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention relates to the field of engineering machinery, and provides a hydraulic pump control method, a hydraulic pump control device and a working machine, wherein the method comprises the following steps: acquiring the air inlet pressure of an engine in the working machine; determining a target loading power of a hydraulic pump in the work machine based on the intake pressure; generating a power adjustment command based on the target loading power and transmitting to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting command. The invention has simple parameter adjustment process, greatly shortens the research and development period of the operation machinery in engineering design, can adjust the loading power of the hydraulic pump in real time according to the air inlet pressure of the engine, effectively reduces the occurrence frequency of black smoke when the engine falls down, ensures the stability of the rotating speed of the engine and the smoothness of operation, and further improves the use efficiency of fuel and the operation experience of operators of the operation machinery.
Description
Technical Field
The present invention relates to the field of engineering machinery technologies, and in particular, to a hydraulic pump control method and apparatus, and a working machine.
Background
In a hydraulic system taking a diesel engine as power output, the problem of engine speed drop is frequently encountered, and the loading speed of a power element, namely a hydraulic pump, is controlled mainly by a traditional PID control method with the aid of a fixed loading speed so as to prevent the engine speed drop. The problem that the engine is in a falling speed and emits black smoke can be solved through a traditional PID control method, but the method has the problem that the parameter debugging is difficult in a design stage, so that the development progress of the operation machinery is delayed; meanwhile, all conditions cannot be traversed in the design stage, so that the problems of engine speed drop and unstable rotating speed are difficult to effectively avoid in practical application.
Disclosure of Invention
The invention provides a hydraulic pump control method, a hydraulic pump control device and a working machine, aiming at the problems existing in the prior art.
The invention provides a hydraulic pump control method, comprising the following steps:
acquiring the air inlet pressure of an engine in the working machine;
determining a target charge power of a hydraulic pump in the work machine based on the intake pressure;
generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
According to the hydraulic pump control method provided by the invention, the determining the target loading power of the hydraulic pump in the working machine based on the intake pressure comprises the following steps:
determining a target duration of a loading ramp of the hydraulic pump based on the intake pressure;
and determining the target loading power of the hydraulic pump according to the target time length of the loading slope.
According to the hydraulic pump control method provided by the invention, the method for determining the target duration of the loading slope of the hydraulic pump based on the intake pressure comprises the following steps:
determining a numerical interval in which the intake pressure is located as a target interval;
and determining the target duration of the loading ramp based on the target interval.
According to the hydraulic pump control method provided by the invention, the determining the target duration of the loading slope based on the target interval comprises the following steps:
and determining the time length corresponding to the target interval based on the corresponding relation between the preset numerical interval and the time length of the loading slope, and taking the time length as the target time length of the loading slope.
According to the hydraulic pump control method provided by the invention, the determining the target loading power of the hydraulic pump according to the target time length of the loading slope comprises the following steps:
acquiring the current loading power and the required loading power of the hydraulic pump; wherein the demand charge power is determined based on an operating command of the work machine;
and determining the target loading power of the hydraulic pump based on the current loading power, the required loading power and the target duration of the loading slope.
According to the hydraulic pump control method provided by the invention, the determining the target duration of the loading slope based on the target interval comprises the following steps:
and when the target interval corresponding to the current moment is different from the target interval corresponding to the last moment or a new operation instruction is received at the current moment, determining the target duration of the loading slope based on the target interval corresponding to the current moment.
The present invention also provides a hydraulic pump control apparatus including:
the data acquisition module is used for acquiring the air inlet pressure of an engine in the working machine;
a first calculation module for determining a target loading power of a hydraulic pump in the work machine based on the intake pressure;
a second calculation module for generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
The present invention also provides a work machine comprising: an engine, a hydraulic pump, and a hydraulic pump control device as described above.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the hydraulic pump control method as described in any one of the above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a hydraulic pump control method as described in any of the above.
According to the hydraulic pump control method, the hydraulic pump control device and the working machine, the air inlet pressure of the engine in the working machine is obtained, the target loading power of the hydraulic pump is determined based on the air inlet pressure, and the power adjusting command is generated based on the target loading power and sent to the adjusting component of the hydraulic pump, so that the hydraulic pump is controlled to adjust the loading power through the adjusting component, the parameter adjusting process is simple, the research and development period of the working machine in engineering design is greatly shortened, the loading power of the hydraulic pump can be adjusted in real time according to the air inlet pressure of the engine, the occurrence frequency of the engine falling speed and black smoke is effectively reduced, the stability of the engine rotating speed and the smoothness of operation are guaranteed, and the use efficiency of fuel and the operation experience of operators of the working machine are further improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a hydraulic pump control method provided by the present invention;
FIG. 2 is a graph showing the variation of intake pressure with time according to the present invention;
FIG. 3 is a schematic view of a hydraulic pump control apparatus according to the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The hydraulic pump control method of the present invention is described below with reference to fig. 1 to 2. The hydraulic pump control method is executed by electronic equipment such as a controller or hardware and/or software in the electronic equipment. The controller may be a controller of the work machine itself, such as an ECU (Electronic Control Unit ) in the work machine, or may be a newly added controller. Fig. 1 is a schematic flow chart of a hydraulic pump control method according to the present invention, as shown in fig. 1, the hydraulic pump control method according to the present invention includes:
s101, acquiring the air inlet pressure of an engine in the working machine.
Specifically, work machines such as excavators, cranes, and the like. The intake pressure of the engine may be obtained by collecting the intake pipe pressure of the engine. The intake pressure may be a specific pressure value or may be a percentage of the intake pressure, that is, a ratio of the intake pressure at the current time to the maximum intake pressure under the working condition. The air inlet pressure of the engine can be obtained in real time to update the target loading power of the hydraulic pump in real time according to the air inlet pressure, and the air inlet pressure of the engine can be obtained once in preset time intervals to reduce calculation cost. Taking collected historical intake pressure data as an example, a diagram of a change curve of intake pressure of an engine along with time is shown in fig. 2, and as can be seen from fig. 2, in 16 s-18 s, the intake pressure is lower, if the load suddenly increases, the fuel injection quantity of the engine suddenly increases, and the intake air quantity cannot be rapidly increased under the influence of factors such as environment, the structure of an intake system and the like, so that the intake air quantity cannot be matched with the fuel injection quantity, and the engine has larger dropping speed; in 18 s-26 seconds, the air inlet pressure reaches a higher value, and if the load is increased, the engine speed is not obvious.
S102, determining target loading power of a hydraulic pump in the working machine based on the intake pressure.
Specifically, the target loading power of the hydraulic pump may be the loading power required by the hydraulic pump at the next moment, and may also be the loading power required by the hydraulic pump in a period of time after the current moment; if the target loading power is the loading power required by the hydraulic pump at the next moment, the target loading power is a value, and if the target loading power is the loading power required by the hydraulic pump in a time period after the current moment, the target loading power is a discrete value or a continuous loading power change curve corresponding to a plurality of different moments in the hydraulic pump loading power adjusting process. The specific method of determining the target loading power of the hydraulic pump in the work machine based on the intake pressure may be set according to actual requirements, for example, the loading rate of the hydraulic pump may be determined according to the intake pressure, and the target loading power of the hydraulic pump may be determined according to the current loading power (i.e., the loading power at the current time), the demanded loading power, and the loading rate of the hydraulic pump. The demanded charge power may be determined from the latest received operating command corresponding to the hydraulic pump to be regulated, which may be acquired by a corresponding operating element in the work machine, such as a throttle, a control lever. In addition, the loading rate of the hydraulic pump corresponding to the intake pressure at the current moment can be determined according to the corresponding relation between the intake pressure and the loading rate of the hydraulic pump. It will be appreciated that it is also possible to determine the available torque of the engine at the present moment from the intake pressure and to determine the target charge power of the hydraulic pump from the available torque of the engine. The available torque of the engine can be determined according to the air inlet pressure, the air outlet pressure, the rotating speed and the displacement of the engine at the current moment, and the available torque of the engine at the current moment can also be determined according to the corresponding relation between the air inlet pressure and the available torque.
According to the embodiment of the invention, the target loading power of the hydraulic pump is determined according to the air inlet pressure, so that the matching of the oil injection quantity and the air inlet quantity can be effectively ensured, the occurrence frequency of black smoke generated when the engine falls down is reduced, and the stability of the rotating speed of the engine is further ensured.
S103, generating a power adjustment command based on the target loading power and sending the power adjustment command to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
Specifically, the power adjustment command is a command for controlling the hydraulic pump to adjust the loading power. The adjusting component of the hydraulic pump can be an electromagnetic regulator in the hydraulic pump, and can generate a corresponding current signal according to the target loading power and send the current signal to the electromagnetic regulator as a power adjusting instruction so as to adjust the loading power of the hydraulic pump to the target loading power. If the target loading power is the loading power required by the hydraulic pump at the next moment, the current signal is a current value, and if the target loading power is the loading power required by the hydraulic pump in a time period after the current moment, the current signal is a plurality of discrete current values corresponding to different moments in the loading power adjusting process or a current curve continuously changing along with time in a time period.
According to the embodiment of the invention, the target loading power of the hydraulic pump is determined based on the air inlet pressure by acquiring the air inlet pressure of the engine in the working machine, and the power adjusting command is generated based on the target loading power and sent to the adjusting component of the hydraulic pump, so that the hydraulic pump is controlled by the adjusting component to adjust the loading power.
Meanwhile, the traditional PID control method controls the loading speed of the hydraulic pump through fixed loading speed, so that the real-time maximum torque and power of the engine are difficult to develop, and parameters are required to be adjusted respectively according to different environmental working conditions. According to the embodiment of the invention, the loading power of the hydraulic pump is regulated in real time through the air inlet pressure of the engine, and the response speed of the hydraulic pump can be improved while the engine speed is controlled, so that the real-time maximum torque and power of the engine can be exerted, the engine speed regulating device is applicable to various different environmental working conditions, the research and development time cost is reduced, and the method is simple and efficient.
In addition, the conventional PID control method generally controls the speed-down according to the rotation speed of the engine, but the embodiment of the invention controls the loading power of the hydraulic pump according to the air inlet pressure of the engine, and as the air inlet pressure of the engine has the advance relative to the rotation speed of the engine, compared with the conventional PID control method, the embodiment of the invention can further improve the response speed of the hydraulic pump and ensure the effectiveness of the speed-down control result of the engine.
Based on the above embodiment, the determining the target loading power of the hydraulic pump in the work machine based on the intake pressure includes:
determining a target duration of a loading ramp of the hydraulic pump based on the intake pressure;
and determining the target loading power of the hydraulic pump according to the target time length of the loading slope.
In particular, the loading ramp of the hydraulic pump is used to characterize the rate of change of the loading power of the hydraulic pump, the longer the duration of the loading ramp, the slower the rate of change of the loading power. The duration of the loading ramp, i.e. the duration required by the current loading power of the hydraulic pump to the demanded loading power.
The target time length of the loading slope is the time length required by the current loading power of the hydraulic pump to the required loading power according to the inlet pressure at the current moment. The specific manner of determining the target time length of the loading slope of the hydraulic pump based on the intake pressure can be set according to actual requirements, for example, the time length of the loading slope corresponding to the intake pressure at the current moment can be determined through a preset mapping relation between the intake pressure and the time length of the loading slope, so as to be used as the target time length of the loading slope.
After the target time length of the loading slope is determined, the target loading power of the hydraulic pump can be determined according to the target time length of the loading slope, for example, the loading power at each moment in the loading power adjusting process can be obtained according to the current loading power, the required loading power and the target time length of the loading slope of the hydraulic pump, or the change curve of the loading power in the process of adjusting the current loading power to the required loading power.
According to the embodiment of the invention, the target time length of the loading slope of the hydraulic pump is determined based on the air inlet pressure, and the target loading power of the hydraulic pump is determined according to the target time length of the loading slope, so that the accuracy and the effectiveness of a target loading power determination result can be effectively ensured, and the occurrence frequency of black smoke generated when the engine falls down is further reduced.
Based on any of the above embodiments, the determining the target duration of the loading ramp of the hydraulic pump based on the intake pressure includes:
determining a numerical interval in which the intake pressure is located as a target interval;
and determining the target duration of the loading ramp based on the target interval.
Specifically, a plurality of data intervals may be preset, each corresponding to a different level of intake pressure, such as a high intake pressure, a medium intake pressure, a low intake pressure. After the intake pressure of the engine is obtained, the intake pressure can be matched according to the upper limit value and the lower limit value of each data interval, so that a numerical interval where the intake pressure is located is obtained, and the numerical interval is taken as a target interval.
After the target interval is determined, a target duration of the loading ramp may be further determined based on the target interval. The specific manner of determining the target duration of the loading ramp according to the target interval may be set according to actual requirements, for example, the duration of the loading ramp corresponding to the target interval may be determined according to the corresponding relationship between the numerical interval and the duration of the loading ramp, so as to be used as the target duration of the loading ramp.
If the target loading power is the loading power required by the hydraulic pump at the next moment, determining the target loading power of the hydraulic pump according to the air inlet pressure after acquiring the air inlet pressure of the engine each time; if the target loading power is the loading power required by the hydraulic pump in a time period after the current moment, the target loading power of the hydraulic pump can be determined according to the air inlet pressure after the air inlet pressure of the engine is obtained each time, and if the air inlet pressure obtained at the current time and the air inlet pressure obtained at the last time are not in the same numerical interval, if so, the target loading power of the hydraulic pump does not need to be determined again according to the air inlet pressure obtained at the current time, if not, the target loading power of the hydraulic pump is determined again according to the air inlet pressure obtained at the current time until the new operation instruction is received, and then the target loading power of the hydraulic pump is updated according to the air inlet pressure obtained at the current time.
According to the embodiment of the invention, the calculated amount can be effectively reduced and the calculation efficiency of the target loading power of the hydraulic pump can be improved by determining the numerical interval of the air inlet pressure and determining the target time length of the loading slope based on the numerical interval of the air inlet pressure.
Based on any of the foregoing embodiments, the determining the target duration of the loading ramp based on the target interval includes:
and determining the time length corresponding to the target interval based on the corresponding relation between the preset numerical interval and the time length of the loading slope, and taking the time length as the target time length of the loading slope.
Specifically, the corresponding relation between the preset numerical value interval and the duration of the loading slope can be stored in a mapping table, after the target interval is determined, the target interval is matched with the numerical value interval in the mapping table, and the duration of the loading slope corresponding to the successfully matched numerical value interval is used as the target duration of the loading slope, so that the target duration of the loading slope can be rapidly and accurately determined, and the accuracy of the determination result of the target loading power of the hydraulic pump is further improved.
The corresponding relation between the preset numerical value interval and the duration of the loading slope can be determined through experimental data and the performance of the working machine, the lower the level of the air inlet pressure is, the more serious the falling speed is, the longer the duration of the loading slope can be, so that the loading speed of the hydraulic pump is reduced, and the occurrence frequency of black smoke generated when the engine falls down can be effectively reduced; in contrast, the higher the level of the intake pressure is, the more slight the falling speed is, the time for loading the slope can be shortened to improve the loading rate of the hydraulic pump, so that after the intake pressure is increased, the requirement of an operation instruction can be responded in time while the falling speed of the engine is controlled, and the response speed of the hydraulic pump is improved. For example, the duration of the loading ramps corresponding to the high, medium, and low intake pressures may be set to 500, 700, and 1000 milliseconds, respectively, and different values may be set for different work machines and for different conditions.
Based on any of the above embodiments, the determining the target loading power of the hydraulic pump according to the target duration of the loading ramp includes:
acquiring the current loading power and the required loading power of the hydraulic pump; wherein the demand charge power is determined based on an operating command of the work machine;
and determining the target loading power of the hydraulic pump based on the current loading power, the required loading power and the target duration of the loading slope.
Specifically, the current loading power of the hydraulic pump is the loading power of the hydraulic pump at the current moment; the demanded charge power is determined based on the latest received operation instruction corresponding to the hydraulic pump to be subjected to the charge power adjustment, i.e., the charge power required to satisfy the operation instruction.
Based on the current loading power, the required loading power and the target duration of the loading ramp, the specific manner of determining the target loading power of the hydraulic pump can be set according to the actual requirements. For example, a line segment, that is, a change of the loading power in the process of adjusting the current loading power to the required loading power by the hydraulic pump, may be determined according to the coordinates determined by the current time and the current loading power as a starting point, and according to the sum of the current time and the target time length of the loading slope and the coordinates determined by the required loading power as an ending point. If the target loading power is a discrete value, the target loading power corresponding to the corresponding moment can be determined according to the value of the line segment at different moments, and if the target loading power is a continuous loading power change curve, the line segment can be directly used as the target loading power.
According to the embodiment of the invention, the current loading power and the required loading power of the hydraulic pump are obtained, and the target loading power of the hydraulic pump is determined based on the current loading power, the required loading power and the target time length of the loading slope, so that the target loading power of the hydraulic pump can be rapidly and accurately determined, the occurrence frequency of black smoke generated when the engine drops can be effectively reduced, and the response speed of the hydraulic pump can be improved.
Based on any of the foregoing embodiments, the determining the target duration of the loading ramp based on the target interval includes:
and when the target interval corresponding to the current moment is different from the target interval corresponding to the last moment or a new operation instruction is received at the current moment, determining the target duration of the loading slope based on the target interval corresponding to the current moment.
Specifically, a target interval corresponding to the current moment, namely a numerical interval corresponding to the intake pressure acquired at the current moment; the target interval corresponding to the last moment, namely the numerical interval corresponding to the intake pressure acquired at the last moment.
If the target interval corresponding to the current moment is the same as the target interval corresponding to the last moment and the new operation instruction is not received at the current moment, the target loading power can be updated without according to the air inlet pressure acquired at the current moment, otherwise, the target duration of the loading slope is required to be determined according to the target interval corresponding to the current moment, and the target loading power of the hydraulic pump is required to be determined again according to the target duration.
It should be noted that, the method of the embodiment of the present invention is only applicable to the case that the target loading power is the loading power required by the hydraulic pump in a time period after the current time, if the target loading power is the loading power required by the hydraulic pump at the next time, after each intake pressure is obtained, the target loading power of the hydraulic pump at the next time needs to be determined according to the intake pressure at the current time.
The traditional PID control method cannot ensure the linearity of the output of the hydraulic pump in the parameter debugging process, so that the running stability of the engine cannot be ensured.
According to the embodiment of the invention, when the target interval corresponding to the current moment is determined to be different from the target interval corresponding to the last moment or a new operation instruction is received at the current moment, the target duration of the loading slope is determined based on the target interval corresponding to the current moment, and the target loading power of the hydraulic pump is determined again according to the target duration, so that the loading rate of the hydraulic pump can be optimized according to the sectional loading slope, the response speed of the hydraulic pump is improved while the engine speed is controlled, the linearity of the loading power of the hydraulic pump is ensured, and the running stability of the engine is further ensured.
The hydraulic pump control apparatus provided by the present invention will be described below, and the hydraulic pump control apparatus described below and the hydraulic pump control method described above may be referred to in correspondence with each other. As shown in fig. 3, the hydraulic pump control apparatus of the present invention includes:
a data acquisition module 301 for acquiring an intake pressure of an engine in the work machine;
a first calculation module 302 for determining a target charge power of a hydraulic pump in the work machine based on the intake pressure;
a second calculation module 303 for generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
Based on the above embodiment, the first computing module 302 is specifically configured to:
determining a target duration of a loading ramp of the hydraulic pump based on the intake pressure;
and determining the target loading power of the hydraulic pump according to the target time length of the loading slope.
Based on any of the above embodiments, the first computing module 302 is specifically configured to:
determining a numerical interval in which the intake pressure is located as a target interval;
and determining the target duration of the loading ramp based on the target interval.
Based on any of the above embodiments, the first computing module 302 is specifically configured to:
and determining the time length corresponding to the target interval based on the corresponding relation between the preset numerical interval and the time length of the loading slope, and taking the time length as the target time length of the loading slope.
Based on any of the above embodiments, the first computing module 302 is specifically configured to:
acquiring the current loading power and the required loading power of the hydraulic pump; wherein the demand charge power is determined based on an operating command of the work machine;
and determining the target loading power of the hydraulic pump based on the current loading power, the required loading power and the target duration of the loading slope.
Based on any of the above embodiments, the first computing module 302 is specifically configured to:
and when the target interval corresponding to the current moment is different from the target interval corresponding to the last moment or a new operation instruction is received at the current moment, determining the target duration of the loading slope based on the target interval corresponding to the current moment.
The present invention also provides a work machine comprising: an engine, a hydraulic pump, and the hydraulic pump control apparatus according to any of the above embodiments.
Specifically, work machines such as excavators, cranes, and the like.
Fig. 4 illustrates a physical schematic diagram of an electronic device, as shown in fig. 4, which may include: a processor (processor) 401, a communication interface (Communications Interface) 402, a memory (memory) 403 and a communication bus 404, wherein the processor 401, the communication interface 402 and the memory 403 complete communication with each other through the communication bus 404. The processor 401 may call logic instructions in the memory 403 to perform a hydraulic pump control method, which includes: acquiring the air inlet pressure of an engine in the working machine;
determining a target charge power of a hydraulic pump in the work machine based on the intake pressure;
generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
Further, the logic instructions in the memory 403 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the hydraulic pump control method provided by the above methods, the method comprising: acquiring the air inlet pressure of an engine in the working machine;
determining a target charge power of a hydraulic pump in the work machine based on the intake pressure;
generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
In still another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the hydraulic pump control methods provided above, the method comprising: acquiring the air inlet pressure of an engine in the working machine;
determining a target charge power of a hydraulic pump in the work machine based on the intake pressure;
generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A hydraulic pump control method, characterized by comprising:
acquiring the air inlet pressure of an engine in the working machine;
determining a target charge power of a hydraulic pump in the work machine based on the intake pressure; the determining a target loading power of a hydraulic pump in the work machine based on the intake pressure includes: determining a numerical interval in which the intake pressure is located as a target interval; determining a target duration of a loading slope of the hydraulic pump based on the target interval; determining a target loading power of the hydraulic pump according to the target duration of the loading slope;
generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
2. The hydraulic pump control method according to claim 1, characterized in that the determining a target duration of a loading ramp of the hydraulic pump based on the target interval includes:
and determining the time length corresponding to the target interval based on the corresponding relation between the preset numerical interval and the time length of the loading slope, and taking the time length as the target time length of the loading slope.
3. The hydraulic pump control method according to claim 1, characterized in that the determining the target charge power of the hydraulic pump according to the target duration of the charge ramp includes:
acquiring the current loading power and the required loading power of the hydraulic pump; wherein the demand charge power is determined based on an operating command of the work machine;
and determining the target loading power of the hydraulic pump based on the current loading power, the required loading power and the target duration of the loading slope.
4. The hydraulic pump control method according to claim 3, characterized in that the determining the target duration of the loading ramp of the hydraulic pump based on the target interval includes:
and when the target interval corresponding to the current moment is different from the target interval corresponding to the last moment or a new operation instruction is received at the current moment, determining the target duration of the loading slope based on the target interval corresponding to the current moment.
5. A hydraulic pump control apparatus, comprising:
the data acquisition module is used for acquiring the air inlet pressure of an engine in the working machine;
a first calculation module for determining a target loading power of a hydraulic pump in the work machine based on the intake pressure; the determining a target loading power of a hydraulic pump in the work machine based on the intake pressure includes: determining a numerical interval in which the intake pressure is located as a target interval; determining a target duration of a loading slope of the hydraulic pump based on the target interval; determining a target loading power of the hydraulic pump according to the target duration of the loading slope;
a second calculation module for generating a power adjustment command based on the target loading power and sending to an adjustment assembly of the hydraulic pump; the adjusting component is used for controlling the hydraulic pump to adjust loading power according to the power adjusting instruction.
6. A work machine, comprising: an engine, a hydraulic pump, and a hydraulic pump control apparatus according to claim 5.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the hydraulic pump control method according to any one of claims 1 to 4 when executing the program.
8. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the hydraulic pump control method according to any one of claims 1 to 4.
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