CN109356733A - Control method, control system and the engineering machinery of dynamical system - Google Patents
Control method, control system and the engineering machinery of dynamical system Download PDFInfo
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- CN109356733A CN109356733A CN201811519830.XA CN201811519830A CN109356733A CN 109356733 A CN109356733 A CN 109356733A CN 201811519830 A CN201811519830 A CN 201811519830A CN 109356733 A CN109356733 A CN 109356733A
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- engine
- revolving speed
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- flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
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- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention provides a kind of control method of dynamical system, control system and engineering machinery, and wherein the control method of dynamical system includes: the first flow for obtaining oil pump；First revolving speed operation of the control engine to match with first flow；Obtain the maximum power of the bearing power and engine of engine under the first revolving speed；Bearing power is compared with maximum power；The revolving speed of engine is adjusted according to comparison result, the present invention according to engine bearing power and maximum power be compared, and then it is adjusted according to revolving speed of the comparison result to engine, user is comprehensively considered for the flow demand of oil pump, limit the minimum speed and maximum speed of engine, so that engine works in economic fuel-efficient and low noise region, so that energy consumption be effectively reduced.
Description
Technical field
The present invention relates to technical field of engineering machinery, control method, Yi Zhongdong in particular to a kind of dynamical system
The control system of Force system and a kind of engineering machinery.
Background technique
Currently, the engine energy-saving control of concrete pump mainly uses two kinds of control modes: one is the fixations in oil pump
Engine is arranged under discharge capacity to run with fixed rotating speed；Another kind is to obtain engine output to adjust engine to be suitble to
Revolving speed operation.However the first control mode cannot achieve according to load change adjust engine speed, if engine continuous with
When high revolving speed is run, then oil consumption is higher, if the fixed rotating speed setting of engine is lower, is easy in the case where loading higher situation
It is flame-out；When the load of engineering machinery variation is frequent, under second of control mode, the revolving speed of engine will be adjusted ceaselessly
Speed, revolving speed is fluctuated, influences the safe application performance of engine.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the first aspect of the invention is, a kind of control method of dynamical system is proposed.
The second aspect of the invention is, proposes a kind of control system of dynamical system.
The third aspect of the invention is, proposes a kind of engineering machinery.
In view of this, according to the first aspect of the invention, providing a kind of control method of dynamical system, dynamical system
Including oil pump and engine, which is characterized in that the control method of dynamical system includes: the first flow for obtaining oil pump；Control hair
First revolving speed operation of the motivation to match with first flow；The bearing power and engine for obtaining engine are under the first revolving speed
Maximum power；Bearing power is compared with maximum power；The revolving speed of engine is adjusted according to comparison result.
The present invention provides a kind of control methods of dynamical system, and wherein dynamical system includes oil pump and engine, power
The control method of system includes the first flow for obtaining oil pump, the first revolving speed fortune for controlling engine to match with first flow
Row, obtains the maximum power of the bearing power and engine of engine under the first revolving speed, and then to the bearing power of engine
It is compared with the maximum power of engine, is then adjusted according to revolving speed of the comparison result to engine.Wherein, oil pump
First flow is user setting, i.e., the flow of oil pump can be arranged in user by flow input signal device (toggle switch).Hair
Motivation can carry out linear scale step-less adjustment according to the first flow of oil pump, so that the revolving speed of engine reaches and first flow
The first revolving speed to match, wherein the revolving speed of engine can increase with the flow of oil pump and be increased, with the flow reduction of oil pump
Reduce.The present invention according to engine bearing power and maximum power be compared, and then according to comparison result to engine
Revolving speed be adjusted, comprehensively consider user for the flow demand of oil pump, limit the minimum speed and maximum speed of engine,
So that engine works in economic fuel-efficient and low noise region, so that energy consumption be effectively reduced.Wherein, engine is
CAN bus electric-control motor (CAN, Controller Area Network, controller local area network), dynamical system can be real
When obtain the permitted maximum power of external characteristic curve under the power of engine, current rotating speed, and can be changed according to load
And consider that the energy consumption of engine and noise are automatically adjusted to optimum speed, so that engine increases the adaptive faculty that operating condition changes
By force.
In addition, the control method of the dynamical system in the above-mentioned technical proposal provided according to the present invention, can also have as
Lower additional technical feature:
In the above-mentioned technical solutions, it is preferable that the step of revolving speed of engine is adjusted according to comparison result, comprising: when negative
When carrying power less than maximum power, engine is run with the first revolving speed；When bearing power is greater than or equal to maximum power, adjust
The revolving speed of engine.
In the technical scheme, when the bearing power of engine is less than maximum power, then show turn of engine at this time
The flow of speed and oil pump meets the power demand of load, and the revolving speed of engine is constant at this time, still with the operation of the first revolving speed.Work as hair
When the bearing power of motivation is greater than or equal to maximum power, then show that the flow of the revolving speed of engine and oil pump cannot expire at this time
The power demand loaded enough needs that the revolving speed of engine is adjusted at this time, so that its power demand for meeting load, it is ensured that
The normal work of equipment with the dynamical system.
In any of the above-described technical solution, it is preferable that when bearing power be greater than or equal to maximum power when the step of it
Afterwards, the step of adjusting the revolving speed of engine includes: the duration for detecting bearing power and being greater than or equal to maximum power；Judgement is held
Whether continuous duration is greater than preset duration；When duration be greater than or equal to preset duration, adjust the revolving speed of engine；When lasting
Long to be less than preset duration, engine is run with the first revolving speed.
In the technical scheme, after bearing power is more than or equal to the step of maximum power, engine is adjusted
Before revolving speed, the control method of dynamical system further includes the duration for detecting bearing power and being greater than or equal to maximum power, is sentenced
Whether disconnected duration is greater than preset duration, when duration is greater than or equal to preset duration, then can determine that dynamical system
Power output is unsatisfactory for the demand of equipment, it is therefore necessary to adjust engine speed to obtain biggish power output, and then meet
The power demand of equipment.And work as duration and be less than preset duration, then it can determine that the power demand of equipment is unstable, therefore can enable
The revolving speed of engine is constant, continues to test duration of the bearing power more than or equal to maximum power to determine a need for adjusting
The revolving speed of engine is saved to adjust the power output of dynamical system.
In any of the above-described technical solution, it is preferable that the control method of dynamical system further include: detect the system pressure of oil pump
Power；The invariable power of system pressure and oil pump adjusting pressure spot is compared；It is adjusted according to flow of the comparison result to oil pump
Section.
In the technical scheme, the control method of dynamical system further include: when the load of dynamical system continues to increase, then
The system pressure for detecting oil pump, the invariable power adjusting pressure spot that will test resulting system pressure and oil pump are compared, in turn
It is adjusted according to flow of the comparison result to oil pump.Wherein, oil pump is electronics invariable power oil pump, when the system pressure of oil pump reaches
When adjusting pressure spot to invariable power, then oil pump is under the constant-torque of setting by constant power output.By comparing system pressure and
The invariable power of oil pump adjusts pressure spot, and then takes the flow of adjustment oil pump, so that oil pump is in operated at constant power, it is ensured that hair
The normal operation of motivation, to ensure the normal work of equipment.
In any of the above-described technical solution, it is preferable that the step of being adjusted according to flow of the comparison result to oil pump, packet
It includes: adjusting pressure spot when system pressure is less than or equal to invariable power, control oil pump is run with first flow；When system pressure is greater than
Invariable power adjusts pressure spot, and control oil pump is run with the second flow for being different from first flow.
It in the technical scheme, include: to work as system according to the specific steps that flow of the comparison result to oil pump is adjusted
When pressure is less than or equal to invariable power adjusting pressure spot, then control oil pump is run with first flow, that is to say, that the flow of oil pump
It is still the first flow of user's input, the flow of oil pump is constant.When system pressure, which is greater than invariable power, adjusts pressure spot, then at this time
The flow of oil pump need to be limited, i.e., control oil pump is run at this time with the second flow for being different from first flow, so that oil pump is constant
Constant power output under torque, it is ensured that the normal work of equipment.
In any of the above-described technical solution, it is preferable that control oil pump was run with being different from the second flow of first flow
Step, comprising: second flow is obtained according to the setting torque of system pressure and oil pump, second flow is less than first flow；Control
Oil pump is run with second flow.
In the technical scheme, control oil pump is specifically included with the step of being different from the second flow operation of first flow,
Second flow is obtained according to the setting torque of system pressure and oil pump, wherein second flow is less than first flow, wherein system pressure
The setting torque of power and oil pump meets formula: the flow of oil pump=(2 π of setting torque * of oil pump)/system pressure works as system
When pressure increase, then the flow of oil pump will be limited, and then so that oil pump constant power output under constant-torque, it is ensured that equipment
Normal work.
In any of the above-described technical solution, it is preferable that first revolving speed fortune of the control engine to match with first flow
Capable step, comprising: the flow and hair of oil pump are calculated according to the external characteristic curve of the universal characteristic curve of engine and engine
Matching relationship between the revolving speed of motivation；The first revolving speed is calculated according to first flow and matching relationship；Engine is controlled with first
Revolving speed operation.
In the technical scheme, the step of control engine is run with the first revolving speed to match with first flow is specifically wrapped
Include: according to the external characteristic curve of the universal characteristic curve of engine and engine calculate oil pump flow and engine revolving speed it
Between matching relationship, wherein the universal characteristic curve of engine mainly reflects under different engine speed and loading condition
Rate of fuel consumption.The external characteristic curve of engine refers to can make engine issue maximum power under the best working condition of engine
In the case of measure come engine speed characteristic curve.It can be with by the distinctive universal characteristic curve of engine and external characteristic curve
The matching relationship between the flow of oil pump and the revolving speed of engine is obtained, and then according to the first flow of oil pump and the matching relationship
The first revolving speed of engine is calculated, and then controls engine and is run with the first revolving speed.
In any of the above-described technical solution, it is preferable that the step of adjusting the revolving speed of engine, comprising: according to engine
The bearing power of universal characteristic curve and engine calculates the second revolving speed, and the second revolving speed is greater than the first revolving speed；Control engine with
The operation of second revolving speed.
In the technical scheme, the step of adjusting the revolving speed of engine specifically includes: bent according to the universal characteristic of engine
The bearing power of line and engine calculates the second revolving speed, and the second revolving speed is greater than the first revolving speed, and control engine is transported with the second revolving speed
Row, to meet the power demand of equipment.When bearing power is greater than or equal to maximum power, i.e., the output of dynamical system is dynamic at this time
Power has been unsatisfactory for the power demand of equipment, then first control engine is run with the second revolving speed for being different from the first revolving speed, in turn
Promote the power output of engine.
In any of the above-described technical solution, it is preferable that maximum power is that external characteristics is bent when engine is run with the first revolving speed
The maximum power that line allows；Oil pump sets torque as the peak torque of oil pump.
In any of the above-described technical solution, it is preferable that the control method of dynamical system further include: show oil pump flow,
The bearing power of the system pressure of oil pump, the revolving speed of engine and engine.
In the technical scheme, the control method of dynamical system further include show the flow of oil pump, oil pump system pressure,
The revolving speed of engine and the bearing power of engine, the real-time status of dynamical system can be known convenient for user.
In any of the above-described technical solution, it is preferable that before the step of adjusting the revolving speed of engine according to comparison result,
It further include the peak torque of the load torque and engine of acquisition engine under the first revolving speed, and to load torque and maximum torsion
Square is compared, and wherein comparison result includes the comparison result and bearing power and maximum work of load torque and peak torque
The comparison result of rate.
In the technical scheme, the revolving speed of engine is adjusted by two kinds of comparison results, and aforementioned two kinds are compared
It as a result include the comparison result and load torque of bearing power and maximum power and the comparison result of peak torque, Jin Erke
So that the speed of engine is more applicable for duty requirements, and make engine work in economic fuel-efficient and low noise region
Make, so that energy consumption be effectively reduced.Wherein it is possible to different with the accounting factor of power comparison result according to torque comparison result
And the revolving speed of engine is adjusted.
In any of the above-described technical solution, it is preferable that before the step of adjusting the revolving speed of engine according to comparison result,
Further include obtain the maximum distributive value under the first revolving speed of load distributive value and engine of engine, and to load distributive value with
Maximum distributive value is compared, and wherein comparison result includes the comparison result of bearing power and maximum power, and load oil spout
The comparison result of amount and maximum distributive value.
In the technical scheme, the revolving speed of engine is adjusted by two kinds of comparison results, and aforementioned two kinds are compared
As a result include the comparison result of bearing power and maximum power, and load the comparison result of distributive value and maximum distributive value, into
And it may make that the speed of engine is more applicable for duty requirements, and make engine in economic fuel-efficient and low noise region
Interior work, so that energy consumption be effectively reduced.Wherein it is possible to according to the accounting of power comparison result and distributive value comparison result because
Son is different and the revolving speed of engine is adjusted.
In any of the above-described technical solution, it is preferable that comparison result also may include the ratio of load torque and peak torque
It, can be with compared with as a result, the comparison result and load distributive value of bearing power and maximum power and the comparison result of maximum distributive value
It is different according to the accounting factor of torque comparison result, power comparison result and distributive value comparison result and to the revolving speed of engine into
Row is adjusted.
According to the second aspect of the invention, a kind of control system of dynamical system is provided, comprising: acquiring unit is matched
It is set to the first flow for obtaining oil pump；Control unit is configured to first revolving speed of the control engine to match with first flow
Operation；And maximum power of the bearing power and engine for obtaining engine under the first revolving speed, to bearing power and most
It is high-power to be compared；And the revolving speed for adjusting engine according to comparison result.
The present invention provides a kind of control system of dynamical system, and wherein dynamical system includes oil pump and engine, dynamical system
The control system of system includes: acquiring unit, is configured to obtain the first flow of oil pump, control unit is configured to control engine
With match with first flow the first revolving speed operation, obtain engine bearing power and engine under the first revolving speed most
It is high-power, and then the maximum power of the bearing power and engine to engine is compared, then according to comparison result to hair
The revolving speed of motivation is adjusted.Wherein, the first flow of oil pump is user setting, i.e. user can be filled by flow input signal
Set the flow of (toggle switch) setting oil pump.Engine can carry out linear scale step-less adjustment according to the first flow of oil pump,
So that the revolving speed of engine reaches the first revolving speed to match with first flow, wherein the revolving speed of engine can be with the flow of oil pump
Increase and increase, reduce with the flow of oil pump and reduces.The present invention is according to the bearing power and maximum power progress to engine
Compare, and then be adjusted according to revolving speed of the comparison result to engine, comprehensively considers user for the flow demand of oil pump, limit
The minimum speed and maximum speed of engine processed, so that engine works in economic fuel-efficient and low noise region, thus
Energy consumption is effectively reduced.Wherein, engine be CAN bus electric-control motor (CAN, Controller Area Network,
Controller local area network), the external characteristic curve that dynamical system can be obtained in real time under the power of engine, current rotating speed is allowed
Maximum power, and can according to load change and consider engine energy consumption and noise be automatically adjusted to optimum speed so that
Engine enhances the adaptive faculty that operating condition changes.
In addition, the control system of the dynamical system in the above-mentioned technical proposal provided according to the present invention, can also have as
Lower additional technical feature:
In the above-mentioned technical solutions, it is preferable that the control system of dynamical system includes: detection unit, is configured to detection oil
The system pressure of pump；Control unit is also used to, and the invariable power of system pressure and oil pump adjusting pressure spot is compared；According to than
The flow of oil pump is adjusted in relatively result.
In the technical scheme, the control system of dynamical system includes detection unit, and detection unit is configured to detection oil pump
System pressure.Control unit is also used to for the invariable power of system pressure and oil pump adjusting pressure spot being compared；According to comparing
As a result the flow of oil pump is adjusted.Wherein, oil pump is electronics invariable power oil pump, when the system pressure of oil pump reaches invariable power
When adjusting pressure spot, then oil pump is under the constant-torque of setting by constant power output.By comparing the perseverance of system pressure and oil pump
Power regulation pressure spot, and then the flow of adjustment oil pump is taken to ensure the normal operation of dynamical system and equipment.
In any of the above-described technical solution, it is preferable that control unit is also used to obtain the load torque of engine and starts
Peak torque of the machine under the first revolving speed, is compared load torque and peak torque；And/or control unit is also used to obtain
Maximum distributive value of the load distributive value and engine of engine under the first revolving speed, to load distributive value and maximum distributive value into
Row compares；Wherein, comparison result includes the comparison of the comparison result, bearing power and maximum power of load torque and peak torque
And/or the comparison result of load distributive value and maximum distributive value as a result.
It in the technical scheme, can be according to power comparison result, torque comparison result and/or distributive value comparison result pair
The revolving speed of engine is adjusted.Preferably, knot can be compared according to power comparison result, torque comparison result and distributive value
The accounting factor of fruit is different and the revolving speed of engine is adjusted.
In any of the above-described technical solution, it is preferable that the control system of dynamical system includes: display unit, is configured to show
Show the bearing power of the flow of oil pump, the system pressure of oil pump, the revolving speed of engine and engine.
In the technical scheme, user is made to know the flow of oil pump, oil pump in dynamical system in real time by display unit
System pressure, the revolving speed of engine and the parameter informations such as bearing power of engine.
According to the third aspect of the present invention, a kind of engineering machinery is provided comprising: as in any of the above-described technical solution
The control system of provided dynamical system.
Engineering machinery provided by the invention, the control system including dynamical system described in any of the above-described technical solution, because
This has whole beneficial effects of the control system of the dynamical system, and details are not described herein.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the schematic flow diagram of the control method of the dynamical system of one embodiment of the invention；
Fig. 2 shows the schematic flow diagrams of the control method of the dynamical system of a specific embodiment of the invention；
Fig. 3 shows the schematic flow diagram of the control system of the dynamical system of one embodiment of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Control method, power referring to dynamical system described in Fig. 1 to Fig. 3 description according to some embodiments of the invention
The control system and engineering machinery of system.
The embodiment of first aspect present invention provides a kind of control method of dynamical system.
Fig. 1 shows the schematic flow diagram of the control method of the dynamical system of one embodiment of the invention.
As shown in Figure 1, this method comprises:
S102 obtains the first flow of oil pump；
S104, the first revolving speed operation for controlling engine to match with first flow；
S106 obtains the maximum power of the bearing power and engine of engine under the first revolving speed；
S108 is compared bearing power with maximum power；
S110 adjusts the revolving speed of engine according to comparison result.
The present invention provides a kind of control methods of dynamical system, and wherein dynamical system includes oil pump and engine, power
The control method of system includes the first flow for obtaining oil pump, the first revolving speed fortune for controlling engine to match with first flow
Row, obtains the maximum power of the bearing power and engine of engine under the first revolving speed, and then to the bearing power of engine
It is compared with the maximum power of engine, is then adjusted according to revolving speed of the comparison result to engine.Wherein, oil pump
First flow is user setting, i.e., the flow of oil pump can be arranged in user by flow input signal device (toggle switch).Hair
Motivation can carry out linear scale step-less adjustment according to the first flow of oil pump, so that the revolving speed of engine reaches and first flow
The first revolving speed to match, wherein the revolving speed of engine can increase with the flow of oil pump and be increased, with the flow reduction of oil pump
Reduce.The present invention according to engine bearing power and maximum power be compared, and then according to comparison result to engine
Revolving speed be adjusted, comprehensively consider user for the flow demand of oil pump, limit the minimum speed and maximum speed of engine,
So that engine works in economic fuel-efficient and low noise region, so that energy consumption be effectively reduced.Wherein, engine is
CAN bus electric-control motor (CAN, Controller Area Network, controller local area network), dynamical system can be real
When obtain the permitted maximum power of external characteristic curve under the power of engine, current rotating speed, and can be changed according to load
And consider that the energy consumption of engine and noise are automatically adjusted to optimum speed, so that engine increases the adaptive faculty that operating condition changes
By force.
In one embodiment of the invention, it is preferable that the step of revolving speed of engine is adjusted according to comparison result, packet
Include: when bearing power is less than maximum power, engine is run with the first revolving speed；When bearing power is greater than or equal to maximum power
When, adjust the revolving speed of engine.
In this embodiment, when the bearing power of engine is less than maximum power, then show the revolving speed of engine at this time
And the flow of oil pump meets the power demand of load, the revolving speed of engine is constant at this time, still with the operation of the first revolving speed.When starting
When the bearing power of machine is greater than or equal to maximum power, then show that the revolving speed of engine at this time and the flow of oil pump are not able to satisfy
The power demand of load needs that the revolving speed of engine is adjusted at this time, so that its power demand for meeting load, it is ensured that tool
There is the normal work of the equipment of the dynamical system.
In one embodiment of the invention, it is preferable that in the step of when bearing power is greater than or equal to maximum power
Later, the step of adjusting the revolving speed of engine includes: the duration for detecting bearing power and being greater than or equal to maximum power；Judgement
Whether duration is greater than preset duration；When duration be greater than or equal to preset duration, adjust the revolving speed of engine；When lasting
Duration is less than preset duration, and engine is run with the first revolving speed.
In this embodiment, after bearing power is more than or equal to the step of maximum power, turning for engine is adjusted
Before speed, the control method of dynamical system further includes the duration for detecting bearing power and being greater than or equal to maximum power, judgement
Whether duration is greater than preset duration, when duration is greater than or equal to preset duration, then can determine that the dynamic of dynamical system
Power exports the demand for being unsatisfactory for equipment, it is therefore necessary to adjust engine speed to obtain biggish power output, and then meet and set
Standby power demand.And work as duration and be less than preset duration, then it can determine that the power demand of equipment is unstable, therefore hair can be enabled
The revolving speed of motivation is constant, continues to test duration of the bearing power more than or equal to maximum power to determine a need for adjusting
The revolving speed of engine is to adjust the power output of dynamical system.
In one embodiment of the invention, it is preferable that the control method of dynamical system further include: the system for detecting oil pump
Pressure；The invariable power of system pressure and oil pump adjusting pressure spot is compared；It is carried out according to flow of the comparison result to oil pump
It adjusts.
In this embodiment, the control method of dynamical system further include: when the load of dynamical system continues to increase, then examine
The system pressure for surveying oil pump, the invariable power adjusting pressure spot that will test resulting system pressure and oil pump are compared, Jin Ergen
It is adjusted according to flow of the comparison result to oil pump.Wherein, oil pump is electronics invariable power oil pump, when the system pressure of oil pump reaches
When invariable power adjusts pressure spot, then oil pump is under the constant-torque of setting by constant power output.By comparing system pressure and oil
The invariable power of pump adjusts pressure spot, and then takes the flow of adjustment oil pump, so that oil pump is in operated at constant power, it is ensured that start
The normal operation of machine, to ensure the normal work of equipment.
In one embodiment of the invention, it is preferable that the step of being adjusted according to flow of the comparison result to oil pump,
It include: to adjust pressure spot when system pressure is less than or equal to invariable power, control oil pump is run with first flow；When system pressure is big
Pressure spot is adjusted in invariable power, control oil pump is run with the second flow for being different from first flow.
It in this embodiment, include: when system pressure according to the specific steps that flow of the comparison result to oil pump is adjusted
When power is less than or equal to invariable power adjusting pressure spot, then control oil pump is run with first flow, that is to say, that the flow of oil pump is still
For the first flow of user's input, the flow of oil pump is constant.When system pressure, which is greater than invariable power, adjusts pressure spot, then need at this time
The flow of oil pump is limited, i.e., control oil pump is run at this time with the second flow for being different from first flow, so that oil pump is in constant torsion
Constant power output under square, it is ensured that the normal work of equipment.
In one embodiment of the invention, it is preferable that control oil pump is run with the second flow for being different from first flow
The step of, comprising: second flow is obtained according to the setting torque of system pressure and oil pump, second flow is less than first flow；Control
Liquefaction pump is run with second flow.
In this embodiment, control oil pump is specifically included with the step of being different from the second flow operation of first flow, root
Second flow is obtained according to the setting torque of system pressure and oil pump, wherein second flow is less than first flow, wherein system pressure
Meet formula with the setting torque of oil pump: the flow of oil pump=(2 π of setting torque * of oil pump)/system pressure, i.e., when system pressure
When power increases, then the flow of oil pump will be limited, and then so that oil pump constant power output under constant-torque, it is ensured that equipment
It works normally.
In one embodiment of the invention, it is preferable that first revolving speed of the control engine to match with first flow
The step of operation, comprising: according to the external characteristic curve of the universal characteristic curve of engine and engine calculate oil pump flow with
Matching relationship between the revolving speed of engine；The first revolving speed is calculated according to first flow and matching relationship；Engine is controlled with the
The operation of one revolving speed.
In this embodiment, the step of control engine is run with the first revolving speed to match with first flow is specifically wrapped
Include: according to the external characteristic curve of the universal characteristic curve of engine and engine calculate oil pump flow and engine revolving speed it
Between matching relationship, wherein the universal characteristic curve of engine mainly reflects under different engine speed and loading condition
Rate of fuel consumption.The external characteristic curve of engine refers to can make engine issue maximum power under the best working condition of engine
In the case of measure come engine speed characteristic curve.It can be with by the distinctive universal characteristic curve of engine and external characteristic curve
The matching relationship between the flow of oil pump and the revolving speed of engine is obtained, and then according to the first flow of oil pump and the matching relationship
The first revolving speed of engine is calculated, and then controls engine and is run with the first revolving speed.
In one embodiment of the invention, it is preferable that the revolving speed for adjusting engine includes: universal spy according to engine
The bearing power of linearity curve and engine calculates the second revolving speed, and the second revolving speed is greater than the first revolving speed；Engine is controlled with second turn
Speed operation.
In this embodiment, the step of adjusting the revolving speed of engine specifically includes: according to the universal characteristic curve of engine
The second revolving speed is calculated with the bearing power of engine, the second revolving speed is greater than the first revolving speed, and control engine is run with the second revolving speed,
To meet the power demand of equipment.When bearing power is greater than or equal to maximum power, i.e. the output power of dynamical system at this time
It is unsatisfactory for the power demand of equipment, then first control engine is run with the second revolving speed for being different from the first revolving speed, Jin Erti
Rise the power output of engine.
In one embodiment of the invention, it is preferable that maximum power is external characteristics when engine is run with the first revolving speed
The maximum power that curve allows；Oil pump sets torque as the peak torque of oil pump.
In one embodiment of the invention, it is preferable that the control method of dynamical system further include: show the stream of oil pump
Amount, the bearing power of the system pressure of oil pump, the revolving speed of engine and engine.
In this embodiment, the control method of dynamical system further includes the flow for showing oil pump, the system pressure of oil pump, hair
The revolving speed of motivation and the bearing power of engine, the real-time status of dynamical system can be known convenient for user.
In any of the above-described technical solution, it is preferable that before the step of adjusting the revolving speed of engine according to comparison result,
It further include the peak torque of the load torque and engine of acquisition engine under the first revolving speed, and to load torque and maximum torsion
Square is compared, and wherein comparison result includes the comparison result and bearing power and maximum work of load torque and peak torque
The comparison result of rate.
In the technical scheme, the revolving speed of engine is adjusted by two kinds of comparison results, and aforementioned two kinds are compared
It as a result include the comparison result and load torque of bearing power and maximum power and the comparison result of peak torque, Jin Erke
So that the speed of engine is more applicable for duty requirements, and make engine work in economic fuel-efficient and low noise region
Make, so that energy consumption be effectively reduced.Wherein it is possible to different with the accounting factor of power comparison result according to torque comparison result
And the revolving speed of engine is adjusted.
In any of the above-described technical solution, it is preferable that before the step of adjusting the revolving speed of engine according to comparison result,
Further include obtain the maximum distributive value under the first revolving speed of load distributive value and engine of engine, and to load distributive value with
Maximum distributive value is compared, and wherein comparison result includes the comparison result of bearing power and maximum power, and load oil spout
The comparison result of amount and maximum distributive value.
In the technical scheme, the revolving speed of engine is adjusted by two kinds of comparison results, and aforementioned two kinds are compared
As a result include the comparison result of bearing power and maximum power, and load the comparison result of distributive value and maximum distributive value, into
And it may make that the speed of engine is more applicable for duty requirements, and make engine in economic fuel-efficient and low noise region
Interior work, so that energy consumption be effectively reduced.Wherein it is possible to according to the accounting of power comparison result and distributive value comparison result because
Son is different and the revolving speed of engine is adjusted.
In any of the above-described technical solution, it is preferable that comparison result also may include the ratio of load torque and peak torque
It, can be with compared with as a result, the comparison result and load distributive value of bearing power and maximum power and the comparison result of maximum distributive value
It is different according to the accounting factor of torque comparison result, power comparison result and distributive value comparison result and to the revolving speed of engine into
Row is adjusted.
Specifically, the step of revolving speed of engine being adjusted according to load torque and the comparison result of peak torque, comprising: when
Load torque is less than peak torque, and engine is run with the first revolving speed；When load torque is greater than or equal to peak torque, adjusting hair
The revolving speed of motivation.Preferably, after load torque is more than or equal to the step of peak torque, the revolving speed of engine is adjusted
Step includes: the duration for detecting load torque and being greater than or equal to peak torque；When judging whether duration is greater than default
It is long；When duration be greater than or equal to preset duration, adjust the revolving speed of engine；When duration be less than preset duration, start
Machine is run with the first revolving speed.
In addition, the step of adjusting the revolving speed of engine according to the comparison result of load distributive value and maximum distributive value, comprising:
When loading distributive value less than maximum distributive value, engine is run with the first revolving speed；When load distributive value is greater than or equal to maximum
When distributive value, the revolving speed of engine is adjusted.Preferably, when loading distributive value and being greater than or equal to maximum distributive value the step of it
Afterwards, the step of adjusting the revolving speed of engine includes: the duration that detection load distributive value is greater than or equal to maximum distributive value；Sentence
Whether disconnected duration is greater than preset duration；When duration be greater than or equal to preset duration, adjust the revolving speed of engine；When holding
Continuous duration is less than preset duration, and engine is run with the first revolving speed.
Fig. 2 shows the schematic flow diagrams of the control method of the dynamical system of a specific embodiment of the invention, such as Fig. 2 institute
Show, which includes:
S202 obtains the first flow of oil pump；
S204, the first revolving speed operation for controlling engine to match with first flow；
S206 obtains the maximum power of the bearing power and engine of engine under the first revolving speed；
S208 is compared bearing power with maximum power；
S210, when bearing power is less than maximum power, engine is run with the first revolving speed；
S212, when bearing power is greater than or equal to maximum power, detection bearing power is greater than or equal to maximum power
Duration；
S214, judges whether duration is greater than preset duration；
S216, if it is not, engine is run with the first revolving speed；
S218, if so, control engine is run with the second revolving speed for being different from the first revolving speed；
S220 detects the system pressure of oil pump；
The invariable power of system pressure and oil pump adjusting pressure spot is compared by S222；
S224 adjusts pressure spot when system pressure is less than or equal to invariable power, and control oil pump is run with first flow；
S226 adjusts pressure spot when system pressure is greater than invariable power, and control oil pump is with the second different from first flow
Amount operation；
S228 shows the bearing power of the flow of oil pump, the system pressure of oil pump, the revolving speed of engine and engine.
The embodiment of second aspect of the present invention provides a kind of control system 100 of dynamical system.
Fig. 3 shows the schematic flow diagram of the control system of the dynamical system of one embodiment of the invention.
As shown in figure 3, the system includes: acquiring unit 102, it is configured to obtain the first flow of oil pump；Control unit
104, the first revolving speed operation for being configured to control engine to match with first flow；And the load function for obtaining engine
The maximum power of rate and engine under the first revolving speed is compared bearing power with maximum power；And for according to comparing
As a result the revolving speed of engine is adjusted.
The present invention provides a kind of control system of dynamical system, and wherein dynamical system includes oil pump and engine, dynamical system
The control system of system includes: that acquiring unit 102 is configured to obtain the first flow of oil pump, and control unit 104 is configured to control hair
Motivation is with the first revolving speed operation to match with first flow, and the bearing power and engine for obtaining engine are under the first revolving speed
Maximum power, and then the maximum power of the bearing power and engine to engine is compared, then according to comparison result
The revolving speed of engine is adjusted.Wherein, the first flow of oil pump is user setting, i.e., user can be inputted by flow and be believed
The flow of number device (toggle switch) setting oil pump.Engine can carry out linear scale stepless-adjustment according to the first flow of oil pump
Section, so that the revolving speed of engine reaches the first revolving speed to match with first flow, wherein the revolving speed of engine can be with oil pump
Flow increases and increases, and reduces with the flow of oil pump and reduces.The present invention is according to the bearing power and maximum power to engine
It is compared, and then is adjusted according to revolving speed of the comparison result to engine, comprehensively considering user needs the flow of oil pump
It asks, limits the minimum speed and maximum speed of engine, so that engine works in economic fuel-efficient and low noise region,
To which energy consumption be effectively reduced.Wherein, engine is CAN bus electric-control motor (CAN, Controller Area
Network, controller local area network), dynamical system can obtain the song of the external characteristics under the power of engine, current rotating speed in real time
The permitted maximum power of line, and can be changed according to load and consider that the energy consumption of engine and noise are automatically adjusted to most preferably turn
Speed, so that engine enhances the adaptive faculty that operating condition changes.
In one embodiment of the invention, it is preferable that the control system of dynamical system includes: detection unit, is configured to
Detect the system pressure of oil pump；Control unit is also used to, and the invariable power of system pressure and oil pump adjusting pressure spot is compared；
It is adjusted according to flow of the comparison result to oil pump.
In this embodiment, the control system of dynamical system includes detection unit, and detection unit is configured to detection oil pump
System pressure.Control unit is also used to for the invariable power of system pressure and oil pump adjusting pressure spot being compared；It is tied according to comparing
The flow of oil pump is adjusted in fruit.Wherein, oil pump is electronics invariable power oil pump, when the system pressure of oil pump reaches invariable power tune
When saving pressure spot, then oil pump is under the constant-torque of setting by constant power output.By comparing the permanent function of system pressure and oil pump
Rate adjusts pressure spot, and then takes the flow of adjustment oil pump to ensure the normal operation of dynamical system and equipment.
In any of the above-described technical solution, it is preferable that control unit is also used to obtain the load torque of engine and starts
Peak torque of the machine under the first revolving speed, is compared load torque and peak torque；And/or control unit is also used to obtain
Maximum distributive value of the load distributive value and engine of engine under the first revolving speed, to load distributive value and maximum distributive value into
Row compares；Wherein, comparison result includes the comparison of the comparison result, bearing power and maximum power of load torque and peak torque
And/or the comparison result of load distributive value and maximum distributive value as a result.
It in the technical scheme, can be according to power comparison result, torque comparison result and/or distributive value comparison result pair
The revolving speed of engine is adjusted.Preferably, knot can be compared according to power comparison result, torque comparison result and distributive value
The accounting factor of fruit is different and the revolving speed of engine is adjusted.
In one embodiment of the invention, it is preferable that the control system of dynamical system includes: display unit, is configured to
Show the flow of oil pump, the system pressure of oil pump, the revolving speed of engine and the bearing power of engine.
In this embodiment, user is made to know the flow of oil pump in dynamical system, oil pump in real time by display unit
The parameter informations such as the bearing power of system pressure, the revolving speed of engine and engine.
According to the third aspect of the present invention, a kind of engineering machinery is provided comprising: such as institute in above-mentioned any embodiment
The control system of the dynamical system of offer.
Engineering machinery provided by the invention, the control system including dynamical system described in any of the above-described embodiment, therefore
Whole beneficial effects of control system with the dynamical system, details are not described herein.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of control method of dynamical system, the dynamical system include oil pump and engine, which is characterized in that the power
The control method of system includes:
Obtain the first flow of the oil pump；
The first revolving speed operation that the engine is controlled to match with the first flow；
Obtain the maximum power of the bearing power and the engine of the engine under first revolving speed；
The bearing power is compared with the maximum power；
The revolving speed of the engine is adjusted according to comparison result.
2. the control method of dynamical system according to claim 1, which is characterized in that described to adjust institute according to comparison result
The step of stating the revolving speed of engine, comprising:
When the bearing power is less than the maximum power, the engine is run with first revolving speed；
When the bearing power is greater than or equal to the maximum power, the revolving speed of the engine is adjusted.
3. the control method of dynamical system according to claim 2, which is characterized in that described when the bearing power is big
In or the step of when being equal to the maximum power after, the step of revolving speed for adjusting the engine includes:
Detect the duration that the bearing power is greater than or equal to the maximum power；
Judge whether the duration is greater than preset duration；
When the duration be greater than or equal to the preset duration, adjust the revolving speed of the engine；
When the duration is less than the preset duration, the engine is run with first revolving speed.
4. the control method of dynamical system according to any one of claim 1 to 3, which is characterized in that the dynamical system
The control method of system further include:
Detect the system pressure of the oil pump；
The invariable power of the system pressure and oil pump adjusting pressure spot is compared；
It is adjusted according to flow of the comparison result to the oil pump.
5. the control method of dynamical system according to claim 4, which is characterized in that it is described according to comparison result to described
The step of flow of oil pump is adjusted, comprising:
Pressure spot is adjusted when the system pressure is less than or equal to the invariable power, the oil pump is controlled and is transported with the first flow
Row；
Pressure spot is adjusted when the system pressure is greater than the invariable power, controls the oil pump to be different from the first flow
Second flow operation.
6. the control method of dynamical system according to claim 5, which is characterized in that the control oil pump is with difference
In the step of second flow of the first flow is run, comprising:
The second flow is obtained according to the setting torque of the system pressure and the oil pump, the second flow is less than described
First flow；
The oil pump is controlled to run with the second flow.
7. the control method of dynamical system according to any one of claim 1 to 3, which is characterized in that the control hair
The step of motivation is run with the first revolving speed to match with the first flow, comprising:
According to the external characteristic curve of the universal characteristic curve of the engine and the engine calculate the flow of the oil pump with
Matching relationship between the revolving speed of the engine；
First revolving speed is calculated according to the first flow and the matching relationship；
The engine is controlled to run with first revolving speed.
8. the control method of dynamical system according to claim 2 or 3, which is characterized in that described to adjust the engine
Revolving speed the step of, comprising:
According to the bearing power of the universal characteristic curve of the engine and the engine calculate the second revolving speed, described second turn
Speed is greater than first revolving speed；
The engine is controlled to run with second revolving speed.
9. the control method of dynamical system according to claim 5, which is characterized in that adjusted described according to comparison result
Before the step of revolving speed of the engine, the dynamical system control method further include:
The peak torque of the load torque and the engine of the engine under first revolving speed is obtained, to the load
Torque and the peak torque are compared；
Wherein, the comparison result includes that the comparison result of the bearing power and the maximum power and the load are turned round
The comparison result of square and the peak torque.
10. the control method of dynamical system according to any one of claim 1 to 3, which is characterized in that in the basis
Comparison result was adjusted before the step of revolving speed of the engine, further includes:
The maximum distributive value of the load distributive value and the engine of the engine under first revolving speed is obtained, to described
Load distributive value and the maximum distributive value are compared；
Wherein, the comparison result includes comparison result and the load spray of the bearing power and the maximum power
The comparison result of oil mass and the maximum distributive value.
11. a kind of control system of dynamical system, the dynamical system include oil pump and engine, which is characterized in that described dynamic
The control system of Force system includes:
Acquiring unit is configured to obtain the first flow of the oil pump；
Control unit is configured to control the engine the first revolving speed operation to match with the first flow；
And maximum power of the bearing power and the engine for obtaining the engine under first revolving speed, to institute
Bearing power is stated to be compared with the maximum power；
And the revolving speed for adjusting the engine according to comparison result.
12. the control system of dynamical system according to claim 11, which is characterized in that the control system of the dynamical system
Include:
Detection unit is configured to detect the system pressure of the oil pump；
Described control unit is also used to,
The invariable power of the system pressure and oil pump adjusting pressure spot is compared；
It is adjusted according to flow of the comparison result to the oil pump.
13. the control system of dynamical system according to claim 12, which is characterized in that
The load torque and the engine that described control unit is also used to obtain the engine are under first revolving speed
Peak torque is compared the load torque and the peak torque；And/or
The load distributive value and the engine that described control unit is also used to obtain the engine are under first revolving speed
Maximum distributive value, the load distributive value and the maximum distributive value are compared；
Wherein, the comparison result include the comparison result of the bearing power and the maximum power, the load torque and
The comparison result of the comparison result of the peak torque and/or the load distributive value and the maximum distributive value.
14. a kind of engineering machinery characterized by comprising the dynamical system as described in any one of claim 11 to 13
Control system.
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| CN201811519830.XA CN109356733B (en) | 2018-12-12 | 2018-12-12 | Control method and control system of power system and engineering machinery |
| PCT/CN2019/093856 WO2020119083A1 (en) | 2018-12-12 | 2019-06-28 | Control method for power system, control system, and construction machinery |
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| CN109356733B (en) | 2021-03-16 |
| WO2020119083A1 (en) | 2020-06-18 |
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