CN109184902A - Vehicle-mounted hydraulic power generator and its control method, breakdown lorry - Google Patents
Vehicle-mounted hydraulic power generator and its control method, breakdown lorry Download PDFInfo
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- CN109184902A CN109184902A CN201811329162.4A CN201811329162A CN109184902A CN 109184902 A CN109184902 A CN 109184902A CN 201811329162 A CN201811329162 A CN 201811329162A CN 109184902 A CN109184902 A CN 109184902A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000015556 catabolic process Effects 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 91
- 238000010248 power generation Methods 0.000 claims abstract description 32
- 239000003921 oil Substances 0.000 claims description 70
- 230000033228 biological regulation Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 12
- 239000002828 fuel tank Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009123 feedback regulation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/06—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for pumps
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Gearings (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of vehicle-mounted hydraulic power generator and its control methods, breakdown lorry, wherein, vehicle-mounted hydraulic power generator includes: hydraulic system, hydraulic system includes variable pump (1) and motor (11), and variable pump (1) is connect with the engine (17) of vehicle；Generator (18) is connect with the output end of motor (11)；Detection part, for obtaining the running parameter of hydraulic system；And control unit, for pumping (1) according to the running parameter regulated variable of hydraulic system when engine (17) work, so that motor (11) works in the rotating speed of target for meeting power generation needs.Such vehicle-mounted hydraulic power generator can meet vehicle in parking and driving conditions to high-power electric the needs of, and can neatly control power generation process, and accurately control power generation parameter；And energy loss can be reduced using pump-control-motor hydraulic system；In addition, such power generator may be disposed at chassis, the space utilization rate filled on vehicle is improved.
Description
Technical field
The present invention relates to breakdown lorry technical field more particularly to a kind of vehicle-mounted hydraulic power generator and its control method,
Breakdown lorry.
Background technique
Used in fire-fighting transports fireman and arrives at disaster field in fire and the breakdown lorry of other disasters, and executes for it
Disaster relief task provides multiple types of tools.Fireman needs Rescue Kits when executing rescue task to improve rescue efficiency, partially rescues
Helping equipment needs electric power to provide power, for this reason, it may be necessary to which power generator is arranged on fire fighting truck.
Traditional power generator mostly uses gasoline or diesel generating set mainly to pass through gasoline engine or diesel engine drive hair
Motor work, to realize that power generation, such power generator installation are placed in the upper dress part of fire fighting truck.
Such power generator volume is big, weight is big, power to weight ratio is small, can occupy and put the space for setting equipment, and can not
Meet the function of driving power generation.
Summary of the invention
For this purpose, the embodiment provides a kind of vehicle-mounted hydraulic power generator and its control method, breakdown lorry, energy
Enough meets the needs of driving power generation.
To achieve the above object, the embodiment of the present invention first aspect provides a kind of vehicle-mounted hydraulic power generator, comprising:
Hydraulic system, hydraulic system include variable pump and the motor as executive component, the engine of variable pump and vehicle
It is operably connected；
Generator is connect with the output end of motor；
Detection part, for obtaining the running parameter of hydraulic system；And
Control unit, for being pumped when the engine is working according to the running parameter regulated variable of hydraulic system, so that motor
Work in the rotating speed of target for meeting power generation needs.
Further, the oil outlet of variable pump is connected to the oil inlet of motor, the oil suction of the oil outlet and variable pump of motor
Mouth connection, forms closed circuit.
Further, hydraulic system further includes slippage pump, and slippage pump is connect with engine, for the low-pressure side for variable pump
Repairing and/or stroking mechanism fuel feeding for variable pump.
Further, slippage pump and variable pump are integrally disposed.
Further, hydraulic system includes two overflow means, in parallel with variable pump after the series connection of two overflow means, with
After the output pressure of variable pump is higher than the first preset pressure value, high-pressure side hydraulic oil is made to flow to low-pressure side by two overflow means
It is depressured.
Further, overflow means include the first overflow valve and check valve in parallel, the check valve in two overflow means
It is oppositely arranged, so that after the first overflow valve overflow that high-pressure side hydraulic oil passes through place side, by another overflow means
Check valve flows to low-pressure side.
Further, hydraulic system further includes slippage pump and repairing oil circuit, and repairing oil circuit is equipped with filter and throttle block
One end of Buddhist nun's element, repairing oil circuit is connected to slippage pump, the pipeline connection between the other end and two overflow means.
Further, hydraulic system further includes pressure shut-off valve, is located on the oil circuit where the oil outlet of variable pump, is used for
In the case where the output pressure of variable pump is higher than the second preset pressure value, make high pressure oil off-load to fuel tank.
Further, pressure shut-off valve include the second overflow valve and shuttle valve, two oil inlets of shuttle valve respectively with variable pump
Oil outlet be connected to inlet port, the oil outlet of shuttle valve is connected to the control terminal of the second overflow valve.
Further, hydraulic system further includes heat exchange opening valve, is arranged in parallel between variable pump and motor, for becoming
The output pressure of amount pump is opened in the case where being higher than third preset pressure value, so that the oil of variable pump low-pressure side returns to fuel tank progress
It is cooling.
Further, detection part includes motor rotary speed detection part, for detecting the working speed of motor；Control unit
Including motor rotary speed feedback module, passes through PID arithmetic with the working speed detected for the rotating speed of target according to motor and obtain
First control electric current, variable pump to be adjusted, to keep motor operations revolving speed consistent with rotating speed of target.
Further, motor rotary speed feedback module includes Kind of Integration Separation PID Controller's, for logical in variable pump startup stage
Crossing ratio control makes motor quickly reach rotating speed of target, and passes through integral and/or differential control in variable pump stationary operational phase
Make motor operations in rotating speed of target.
Further, detection part includes:
Pressure detecting part, for detecting the operating pressure of hydraulic system；With
Motor rotary speed detection part, for detecting the working speed of motor；
Control unit includes load compensation module, for being turned according to the hydraulic system working pressure and motor operations that detect
Speed obtains the second control electric current to keep motor operations revolving speed consistent with rotating speed of target, and to be made to become so that variable pump is adjusted
It is steady to measure pump power variation.
Further, detection part includes engine speed detection part, for detecting the working speed of engine；Control
Component includes feed-forward compensation module, third control electric current is obtained for the working speed according to the engine detected, to send out
When motivation working speed amplitude of variation is more than threshold value, according to the engine operation revolving speed and variable pump swash plate angle being obtained ahead of time
Corresponding relationship carries out feed-forward regulation to variable pump, to make the working speed of motor consistent with rotating speed of target in advance.
Further, detection part further include:
Pressure detecting part, for detecting the operating pressure of hydraulic system；With
Engine speed detection part, for detecting the working speed of engine；
Control unit further include:
Load compensation module, for obtaining the second control according to the hydraulic system working pressure and motor operations revolving speed that detect
Electric current processed so that motor operations revolving speed is kept constant, and keeps variable pump changed power steady；
Feed-forward compensation module obtains third control electric current for the working speed according to the engine detected, to send out
It is right according to the corresponding relationship of the engine operation revolving speed and variable pump swash plate angle that are obtained ahead of time when motivation working speed changes
Variable pump carries out feed-forward regulation, to make the working speed of motor consistent with rotating speed of target in advance；With
Integral traffic control module is integrated for controlling electric current, the second control electric current and third control electric current for first, and
Variable pump is adjusted with the electric current after integrating.
To achieve the above object, the embodiment of the present invention second aspect provides a kind of breakdown lorry, including above-mentioned implementation
The vehicle-mounted hydraulic power generator of example, vehicle-mounted hydraulic power generator are located on the chassis of breakdown lorry.
To achieve the above object, the embodiment of the present invention third aspect provides a kind of based on above-mentioned vehicle-mounted hydraulic power generation dress
The control method set, comprising:
The running parameter of detection part acquisition hydraulic system；And
Control unit when the engine is working according to the running parameter regulated variable of hydraulic system pump so that motor operations in
Meet the rotating speed of target of power generation needs.
Further, detection part includes motor rotary speed detection part, and control unit includes motor rotary speed feedback module, control
Method processed includes:
The working speed of motor rotary speed detection part detection motor；
Motor rotary speed feedback module passes through PID arithmetic acquisition the according to the rotating speed of target of motor and the working speed detected
One control electric current, variable pump to be adjusted, to keep motor operations revolving speed consistent with rotating speed of target.
Further, detection part includes: pressure detecting part and motor rotary speed detection part, and control unit includes load
Compensating module, control method include:
The operating pressure of pressure detecting part detection hydraulic system；
The working speed of motor rotary speed detection part detection motor；
Control unit obtains the second control electric current according to the hydraulic system working pressure and motor operations revolving speed detected, with
Variable pump is adjusted, to keep motor operations revolving speed consistent with rotating speed of target, and keeps variable pump changed power steady.
Further, detection part includes engine speed detection part, and control unit includes feed-forward compensation module, control
Method includes:
The working speed of engine speed detection part detection engine；
Feed-forward compensation module obtains third according to the working speed of the engine detected and controls electric current, in engine work
When making rotation speed change, according to the corresponding relationship of the engine operation revolving speed and variable pump swash plate angle that are obtained ahead of time, to variable pump
Feed-forward regulation is carried out, to make the working speed of motor consistent with rotating speed of target in advance.
Further, detection part further includes pressure detecting part and engine speed detection part, and control unit also wraps
Include load compensation module, feed-forward compensation module and integral traffic control module, control method further include:
The operating pressure of pressure detecting part detection hydraulic system；
The working speed of engine speed detection part detection engine；
Load compensation module obtains the second control electricity according to the hydraulic system working pressure and motor operations revolving speed detected
Stream, so that motor operations revolving speed is consistent with rotating speed of target, and keeps variable pump changed power steady；
Feed-forward compensation module obtains third according to the working speed of the engine detected and controls electric current, in engine work
When making rotation speed change, according to the corresponding relationship of the engine operation revolving speed and variable pump swash plate angle that are obtained ahead of time, to variable pump
Feed-forward regulation is carried out, to make the working speed of motor consistent with rotating speed of target in advance；With
Integral traffic control module controls electric current, the second control electric current and third control electric current for first and integrates, and with whole
Variable pump is adjusted in electric current after conjunction.
Based on the above-mentioned technical proposal, the vehicle-mounted hydraulic power generator of one embodiment of the invention is using vehicle motor
Pump-control-motor hydraulic system, which provides power, makes generator generate electricity, when the engine is working can be according to the hydraulic pressure system detected
Running parameter regulated variable of uniting pumps, so that motor operations are in the rotating speed of target for meeting power generation needs.Such vehicle-mounted hydraulic power generation dress
Set can meet vehicle in parking and driving conditions to high-power electric the needs of, and can neatly control power generation process, and essence
Really control power generation parameter；And energy loss can be reduced using pump-control-motor hydraulic system；In addition, such power generator can be set
It is placed in chassis, improves the space utilization rate filled on vehicle.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of one embodiment of vehicle-mounted hydraulic power generator of the present invention；
Fig. 2 is the working principle diagram of one embodiment of vehicle-mounted hydraulic power generator of the present invention；
Fig. 3 is the control unit composition schematic diagram of one embodiment of vehicle-mounted hydraulic power generator of the present invention.
Description of symbols
1, variable pump；2, variable oil cylinder；3/4, the first overflow means；31/41, the first overflow valve；32/42, check valve；5,
Repairing overflow valve；6, throttle element；7, pressure shut-off valve；71, the second overflow valve；72, shuttle valve；8, slippage pump；9, fuel tank；
10, motor rotary speed detection part；11, motor；12, pressure detecting part；13, exchange heat opening valve；14, engine speed test section
Part；15, filter；16, electric proportional valve；17, engine；18, generator；19, engine speed detection part；20, motor turns
Fast feedback module；21, load compensation module；22, feed-forward compensation module；23, integral traffic control module.
Specific embodiment
The present invention described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.So
The various aspects of restriction can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially,
It is considered as preferred or advantageous any feature can be considered as preferred or advantageous feature group with other one or more
It closes.
The terms descriptions merely for convenience such as " first " that occurs in the present invention, " second " have same names to distinguish
Different building blocks, be not offered as successively or primary-slave relation.
In the description of the present invention, the instruction such as "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outside" is used
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention, rather than
The device of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as
Limiting the scope of the invention.
Inventors have found that traditional power generator is unable to satisfy the function of driving power generation, main reason is that, driver exists
Thermoacoustic prime engine is carried out in driver's cabin, and power generator is located at compartment rear portion, power generator and thermoacoustic prime engine are mutually indepedent, driver
The working condition of power generator can not be observed and controlled in driver's cabin, if to control power generator, need to stop and to disappearing
Anti- vehicle rear portion is controlled, and the functional requirement of power generation thus can not be neatly met.Moreover, if needing under emergency conditions
It generates electricity when driving, due to being unable to control the working condition of power generator, it is also poor to will lead to power generation safety.
For this purpose, the present invention provides a kind of vehicle-mounted hydraulic power generator, in a schematical embodiment referring to figs. 1 to 3
In, including hydraulic system, generator 18, detection part and control unit.Wherein, hydraulic system includes the variable pump as oil sources
1 and as executive component motor 11, motor 11 can be used fixed displacement motor, and the engine 17 of variable pump 1 and vehicle is operationally
Connection.Generator 18 is connect with the output end of motor 11, generator 18 can be driven to generate electricity by the rotation of 11 output end of motor.Example
Such as, motor output end can be connected by shaft coupling with generator 18.
Detection part is used to obtain the running parameter of hydraulic system, running parameter and oil including component in hydraulic system
Liquid parameter.Control unit is electrically connected with the stroking mechanism of detection part and variable pump 1, is used for when engine 17 works according to liquid
The running parameter regulated variable pump 1 of pressure system, so that motor 11 works in the rotating speed of target for meeting power generation needs.For example, needing
It when issuing the alternating current of specific frequency, needs that motor 11 is made to work in constant rotational speed, to guarantee the generation frequency of generator 18
It remains unchanged.
The vehicle-mounted hydraulic power generator of this embodiment of the invention at least has one of following advantage:
1, power generation needs of the vehicle in parking and driving conditions can be met, in parking, engine 17 can be made to work, but
It is that traveling gears are in neutral gear, to generate electricity in the state that vehicle stops；In driving, the walking mechanism and generator 18 of vehicle
Shared power source, the power that engine 17 provides can meet driving and power generation needs simultaneously.Vehicle in parking and was driven a vehicle as a result,
Can generate electricity in journey can meet the needs of to high-power electric, and can neatly control power generation process.
2, the running parameter that hydraulic system is obtained by detection part can make control unit that motor 11 be made to work in satisfaction hair
The rotating speed of target of electricity demanding, to accurately control power generation parameter.
3, compared with gasoline or diesel generating set, energy damage can be reduced by carrying out power generation using pump-control-motor hydraulic system
Consumption.
4, such power generator provides power by vehicle motor 17, may be disposed at chassis, facilitates arrangement, improves vehicle
The space utilization rate of upper dress.When being used for fire fighting truck, the placement space of fire-fighting equipment will not be occupied.
In this embodiment, on-off component, such as clutch or power takeoff are equipped between engine 17 and variable pump 1, with
The start and stop for realizing generator 18, can make driver control the beginning and end of charging process for greater flexibility.
Generally, it also is provided with clutch between engine 17 and the walking mechanism of vehicle, when needing parking to charge, can made
The clutch disconnects, so that the power provided when engine 17 works is only used for generating electricity；When needing to drive a vehicle power generation, this can be made
Clutch is connected, so as to the power that provides while be used to walk and generate electricity when engine 17 works.
As shown in Figure 1, the oil outlet of variable pump 1 is connected to the oil inlet of motor 11, the oil outlet and variable pump 1 of motor 11
Inlet port connection, to form closed circuit, make hydraulic system formed enclosed speed control system with adjustable displacement.In the hydraulic system, oil
Liquid can closed circulation in system pipeline, the volume of fuel tank can be reduced, keep hydraulic system structure compact, to reduce power generator
Volume provides power to weight ratio；And outside air is not easily accessible system, and transmission stability can be improved；In addition, the commutation of hydraulic system
It is realized with speed regulation by the stroking mechanism of variable pump 1, hydraulic shock and energy loss can be reduced.
Further, hydraulic system may also include slippage pump 8, and slippage pump 8 is connect with engine 17, for being variable pump 1
Low-pressure side repairing and/or stroking mechanism fuel feeding for variable pump 1.Slippage pump 8 can be coaxially connected with variable pump 1, for example, can be straight
It connects in succession or by the connection such as clutch, power can be provided simultaneously when engine 17 works for variable pump 1 and slippage pump 8.It should
Embodiment can reduce the quantity of power source, to reduce the volume of power generator.
Wherein, the inlet port of slippage pump 8 is connect with fuel tank 9, can be supplemented to the low pressure lateral line of variable pump 1 since leakage is made
At oil liquid loss.The stroking mechanism of variable pump 1 includes electric proportional valve 16 and variable oil cylinder 2, and slippage pump 8 is the confession of variable oil cylinder 2
Oil is swung with the swash plate by the output end regulated variable of variable oil cylinder 2 pump 1, and control unit sends to electric proportional valve 16 and controls
Signal, to adjust the direction and fuel delivery that slippage pump 8 is 2 fuel feeding of variable oil cylinder, to adjust swash plate angle.
Preferably, slippage pump 8 and variable pump 1 are integrally disposed, are not only convenient for making engine 17 while driving slippage pump 8 and becoming
Amount pump 1, moreover it is possible to which the integrated level for improving hydraulic system reduces the volume of power generator.
Further, oil circuit where the oil outlet of slippage pump 8 is equipped with repairing overflow valve 5, it can be achieved that oil compensation pressure controls.
Still referring to FIG. 1, hydraulic system includes two overflow means, after two series connection of overflow means 3,4 simultaneously with variable pump 1
Connection, to make high-pressure side hydraulic oil pass through two overflow means streams after the output pressure of variable pump 1 is higher than the first preset pressure value
It is depressured to low-pressure side.
It, can after pressure reaches oil pressure relief higher than the first preset pressure by the way that overflow means 3,4 are arranged to variable pump
High and low pressure side pipeline connection is depressured, guarantees security of system.Moreover, making liquid by being symmetrical arranged two overflow means
Pressure system can be switched use, can play the role of overflow when controlling 11 positive and negative rotation of motor, improve the versatility of system.
Further, overflow means include the first overflow valve and check valve in parallel, the check valve in two overflow means
It is oppositely arranged, so that after the first overflow valve overflow that high-pressure side hydraulic oil passes through place side, by another overflow means
Check valve flows to low-pressure side.
Specifically, as shown in Figure 1, overflow means 3 include the first overflow valve 31 and check valve 32 in parallel, overflow means 4
Including the first overflow valve 41 and check valve 42 in parallel.The top hydraulic fluid port of variable pump 1 is oil outlet in Fig. 1, defeated when variable pump 1
After pressure is higher than the first preset pressure value out, oil liquid returns to change by 31 overflow of the first overflow valve after flowing through check valve 42
The inlet port of amount pump 1.
On the basis of two overflow means are arranged, hydraulic system further includes slippage pump 8 and repairing oil circuit, on repairing oil circuit
Equipped with filter 15 and throttle element 6, filter 15 is used for the impurity gone in degreasing fluid, and throttle element 6 is for dropping
To reduce the impact of repairing oil circuit, such as restriction can be used in low repairing flow velocity.One end of repairing oil circuit is connected to slippage pump 8,
Pipeline connection between the other end and overflow means 3 and 4.
Oil liquid in fuel tank 9 is flowed out by slippage pump 8, can be through after passing sequentially through filter 15 and throttle element 6
Guo Liangge branch, the first branch are entered in variable oil cylinder 2 by electric proportional valve 16, are provided with the adjusting for variable pump 1 dynamic
Power；Second branch is the repairing mouth that variable pump is added to by one of overflow means.Moreover, being overflow by being symmetrical arranged two
Stream unit makes hydraulic system can be switched use, can play the role of repairing when controlling 11 positive and negative rotation of motor, improve system
Versatility.
On this basis, as shown in Figure 1, hydraulic system further includes pressure shut-off valve 7, it is located at the oil outlet institute of variable pump 1
Oil circuit on, for the output pressure of variable pump 1 be higher than the second preset pressure value in the case where, make high pressure oil off-load to oil
Case 9, wherein the second preset pressure value is greater than the first preset pressure value.By exporting setting pressure shut-off valve 7 in variable pump 1,
System pressure can be rapidly by high pressure unloading when excessively high, minimum injection rate needed for making the discharge capacity of variable pump 1 be reduced to system.
Specifically, pressure shut-off valve 7 include the second overflow valve 71 and shuttle valve 72, two oil inlets of shuttle valve 72 respectively with change
The oil outlet of amount pump 1 is connected to inlet port, and the oil outlet of shuttle valve 72 is connected to the control terminal of the second overflow valve 71, the second overflow valve
71 oil inlet and the oil inlet oil communication of stroking mechanism, are specifically attached on the oil inlet oil circuit of electric proportional valve 16, and second overflows
The oil outlet of stream valve 71 is connect with fuel tank.By using shuttle valve 72, when progress can be increased suddenly in the pressure of 1 either side of variable pump
Off-load improves the reliability of system work.
As shown in Figure 1, hydraulic system further includes heat exchange opening valve 13, it is arranged in parallel between variable pump 1 and motor 11, uses
It is opened in the case where the output pressure of variable pump 1 is higher than third preset pressure value, so that the oil of 1 low-pressure side of variable pump returns to
Fuel tank 9 is cooled down.
For hydraulic system in the usual course of work, oil liquid all uses closed cycle, is higher than the in the output pressure of variable pump 1
When three preset pressure values, system heat generation is larger, and the oil of 1 low-pressure side of variable pump can be made to return to fuel tank 9 at this time and cooled down, and reduces system
Oil liquid in fuel tank 9 can be supplemented in system by system fever, slippage pump 8.By setting heat exchange opening valve 13, it can be achieved that hydraulic
The temperature of system controls.
In some embodiments, as shown in Figure 1 to Figure 3, detection part includes motor rotary speed detection part 10, for detecting
The working speed of motor 11；Control unit includes motor rotary speed feedback module 20, for according to motor 11 rotating speed of target and inspection
The working speed measured obtains the first control electric current by PID arithmetic, variable pump 1 to be adjusted, to make 11 work of motor
It is consistent with rotating speed of target to make revolving speed.
Vehicle engine speed and load real-time change in the process of moving, and motor 11 needs to export constant rotational speed to expire
The power generation needs of sufficient synchronous generator.The method that the embodiment passes through motor rotary speed closed-loop control makes motor 11 stablize output and turns
Speed.Motor rotary speed detection part 10 acquires motor rotary speed signal and rotating speed of target signal contrast makes the difference and passes to motor rotary speed feedback
Module 20 realizes close loop negative feedback control, improves revolving speed and controls precision, makes stabilization of speed in rotating speed of target.
Preferably, motor rotary speed feedback module 20 includes Kind of Integration Separation PID Controller's, in 1 startup stage of variable pump
So that motor 11 is quickly reached rotating speed of target by ratio control, and passes through integral and/or differential in 1 stationary operational phase of variable pump
Control makes motor 11 work in rotating speed of target.Such control mode can be realized 11 speed stabilizing of motor under different phase and export, can
Motor rotary speed control efficiency is improved in 1 startup stage of variable pump, and velocity control accuracy can be improved.
In some embodiments, as shown in Figure 1 to Figure 3, detection part includes pressure detecting part 12 and motor rotary speed inspection
Component 10 is surveyed, pressure detecting part 12 is used to detect the operating pressure of hydraulic system, and motor rotary speed detection part 10 is for detecting
The working speed of motor 11.Control unit includes load compensation module 21, for according to the hydraulic system working pressure detected
The second control electric current is obtained with 11 working speed of motor, variable pump 1 to be adjusted, to make 11 working speed of motor and mesh
It is consistent to mark revolving speed, and keeps 1 changed power of variable pump steady.
For example, pressure detecting part 12 may be provided on the oil circuit of 11 oil inlet of motor.
As shown in Fig. 2, load compensation module 21 receives the operating pressure of hydraulic system and the working speed of motor 11 simultaneously
Signal, when system load increases suddenly, the power of variable pump 1 is varied widely, and can cause shadow to system job stability
It rings, load compensation module 21 can be smoothed the output power of variable pump 1, reduce output-power fluctuation.At the same time,
The working speed of motor 11 can reduce when system load increases, and need to compensate the decline of motor rotary speed.The embodiment energy
While enough 11 speed stabilizing of motor being made to work when system load increases, the work smoothness of system are improved.
In some embodiments, as shown in Figures 2 and 3, detection part includes engine speed detection part 19, for examining
Survey the working speed of engine 17；Control unit includes feed-forward compensation module 22, for the work according to the engine 17 detected
Make revolving speed obtain third control electric current, with 17 working speed amplitude of variation of engine be more than threshold value when, according to what is be obtained ahead of time
The corresponding relationship of 17 working speed of engine and 1 swash plate angle of variable pump carries out feed-forward regulation to variable pump 1, to make in advance
The working speed of motor 11 is consistent with rotating speed of target.
When the working speed of engine 17 significantlys change, at this time if uncomfortable integer variable pump 1, the revolving speed of motor 11 also can
Change therewith, if after waiting the revolving speed of motor 11 to change, and fed back again by motor rotary speed after receiving speed feedback
Module 20 adjusts motor operations revolving speed, it will there are larger delays, influence power generation performance.
Therefore, before motor rotary speed feedback module 20 receives feedback regulation revolving speed, according to engine speed and variable
The corresponding relationship for pumping 1 swash plate angle is in advance adjusted swash plate to corresponding position by feed-forward compensation module 22.Such control method
Engine speed is introduced as variable pump swash plate initial reference amount, gives variable swash plate one in advance initially in input speed variation
Drift angle can be such that the working speed of motor 11 remains to followed by motor rotary speed feedback regulation in 17 rotation speed change of engine
It is enough to keep stablizing.
In a specific embodiment, detection part includes: motor rotary speed detection part 10,12 and of pressure detecting part
Engine speed detection part 19, control unit include: motor rotary speed feedback module 20, load compensation module 21, feedforward compensation
Module 22 and integral traffic control module 23.Wherein, integral traffic control module 23 is used to control electric current, the second control electric current and for first
Three control electric currents are integrated, and variable pump 1 is adjusted with the electric current after integrating.
Further, motor rotary speed feedback module 20 provides negative-feedback, load compensation module 21 to integral traffic control module 23
Positive feedback is provided to integral traffic control module 23, feed-forward compensation module 22 provides positive feedback to integral traffic control module 23, by the first control
The mode that electric current, the second control electric current and third control electric current processed are integrated is to control electric current, the second control electric current for first
It is overlapped with third control electric current, such as linear superposition.
The power generator of the embodiment comprehensively considers 11 turns of motor during controlling 11 working speed of motor
Speed, hydraulic system pressure and engine speed parameter have been taken into account in the case where guaranteeing 11 stabilization of speed of motor in system load
Reduce the fluctuation of 1 power output of variable pump when increase, and improves 11 revolving speed tune of motor when engine speed change amount is larger
The response speed of section, not only can guarantee the control precision and stationarity of 11 revolving speed of motor, but also can optimize the working performance of hydraulic system,
To optimize power generation performance.
To sum up, power generator of the invention can meet vehicle driving and when parking to electric power the needs of, solve vehicle
The problems such as cannot drive a vehicle power generation, and common generator group volume is big, power to weight ratio is small, while there is space utilization rate height, arrangement to facilitate,
Control the advantages that precision is high.
Below with reference to the working principle of Fig. 1 to Fig. 3 the present invention will be described in detail power generator.After power generator starting, motor
Rotating speed measring component 10 acquires tach signal In2With the rotating speed of target signal I of settingnPass to motor rotary speed feedback module 20, horse
The two is made the difference up to speed feedback module 20 and exports electric current I after the processing of integrated Separation PID Controller1。
Meanwhile engine speed detection part 19 acquires engine rotational speed signal In1Feed-forward compensation module 22 is passed to, it is preceding
Feedback compensating module 22 exports electric current I after handling engine rotational speed signal2, in engine speed wide fluctuations, give in advance
One feed-forward signal of variable pump exports electric current I2It can be obtained according to engine speed and the angle corresponding relationship of 1 swash plate of variable pump.
Meanwhile motor rotary speed detection part 10 and pressure detecting part 12 are by tach signal In2With pressure signal IpIt passes to
Load compensation module 21, load compensation module 21 export electric current I after integrating signal processing3, processing mode is to make motor 11
Working speed and rotating speed of target unanimous circumstances under, the power of variable pump 1 is smoothed.
Integral traffic control module 23 is by current signal I1、I2、I3Electric current I is exported after integration processing, output electric current I controls electric ratio
Example valve 16 realizes that 1 output flow of variable pump is constant, guarantees that 11 working speed of motor is constant, to keep with the rotating speed of target of setting
Unanimously.
Secondly, the present invention provides a kind of breakdown lorry, the vehicle-mounted hydraulic power generator including above-described embodiment, vehicle-mounted liquid
Power generation device is located on the chassis of breakdown lorry.For example, breakdown lorry can be rescue fire vehicle or rescue command vehicle etc..
When being used for fire fighting truck, such power generator will not occupy the upper dress space of fire fighting truck, and the space for placing fire-fighting equipment can be improved
Utilization rate.
Finally, the present invention also provides a kind of control methods of vehicle-mounted hydraulic power generator based on the above embodiment, one
In a schematical embodiment, comprising:
The running parameter of detection part acquisition hydraulic system；And
Control unit pumps 1 according to the running parameter regulated variable of hydraulic system when engine 17 works, so that motor 11
Work in the rotating speed of target for meeting power generation needs.
In some embodiments, detection part includes motor rotary speed detection part 10, and control unit includes that motor rotary speed is anti-
Module 20 is presented, control method includes:
The working speed of the detection motor 11 of motor rotary speed detection part 10；
Motor rotary speed feedback module 20 is obtained with the working speed detected by PID arithmetic according to the rotating speed of target of motor 11
The first control electric current is obtained, variable pump 1 to be adjusted, to keep 11 working speed of motor consistent with rotating speed of target.
In some embodiments, detection part includes: pressure detecting part 12 and motor rotary speed detection part 10, control unit
Part includes load compensation module 21, and control method includes:
The operating pressure of the detection hydraulic system of pressure detecting part 12；
The working speed of the detection motor 11 of motor rotary speed detection part 10；
Control unit obtains the second control electric current according to 11 working speed of hydraulic system working pressure and motor detected,
Variable pump 1 to be adjusted, to keep 11 working speed of motor consistent with rotating speed of target, and keep 1 changed power of variable pump flat
Surely.
In some embodiments, detection part includes engine speed detection part 19, and control unit includes feedforward compensation
Module 22, control method include:
The working speed of the detection engine 17 of engine speed detection part 19；
Feed-forward compensation module 22 obtains third according to the working speed of the engine 17 detected and controls electric current, to start
When 17 working speed of machine changes, according to the corresponding relationship of 17 working speed of engine that is obtained ahead of time and 1 swash plate angle of variable pump,
Feed-forward regulation is carried out to variable pump 1, to make the working speed of motor 11 consistent with rotating speed of target in advance.
In a specific embodiment, detection part includes: motor rotary speed detection part 10,12 and of pressure detecting part
Engine speed detection part 19, control unit include: motor rotary speed feedback module 20, load compensation module 21, feedforward compensation
Module 22 and integral traffic control module 23.Control method specifically includes:
The working speed of the detection motor 11 of motor rotary speed detection part 10；
The operating pressure of the detection hydraulic system of pressure detecting part 12；
The working speed of the detection engine 17 of engine speed detection part 19；
Motor rotary speed feedback module 20 is obtained with the working speed detected by PID arithmetic according to the rotating speed of target of motor 11
The first control electric current is obtained, variable pump 1 to be adjusted, to keep 11 working speed of motor consistent with rotating speed of target；
Load compensation module 21 obtains the second control according to 11 working speed of hydraulic system working pressure and motor detected
Electric current processed so that 11 working speed of motor is consistent with rotating speed of target, and keeps 1 changed power of variable pump steady；
Feed-forward compensation module 22 obtains third according to the working speed of the engine 17 detected and controls electric current, to start
When 17 working speed of machine changes, according to the corresponding relationship of 17 working speed of engine that is obtained ahead of time and 1 swash plate angle of variable pump,
Feed-forward regulation is carried out to variable pump 1, to make the working speed of motor 11 consistent with rotating speed of target in advance；With
Integral traffic control module 23 controls electric current, the second control electric current and third control electric current for first and integrates, and with
Variable pump 1 is adjusted in electric current after integration.
Specifically, motor rotary speed feedback module 20 to integral traffic control module 23 provide negative-feedback, load compensation module 21 to
Integral traffic control module 23 provides positive feedback, and feed-forward compensation module 22 provides positive feedback to integral traffic control module 23, by the first control
Electric current, the second control electric current and the mode integrated of third control electric current be, by first control electric current, the second control electric current and
Third control electric current is overlapped, such as linear superposition.
The embodiment has been taken into account in the case where guaranteeing 11 stabilization of speed of motor and has reduced variable pump when system load increases
The fluctuation of 1 power output, and when engine speed change amount is larger improve 11 rotational speed regulation of motor response speed, can
Guarantee the control precision and stationarity of 11 revolving speed of motor, and the working performance of hydraulic system can be optimized, to optimize power generation performance.
A kind of vehicle-mounted hydraulic power generator provided by the present invention and its control method, breakdown lorry have been carried out in detail above
It is thin to introduce.Principle and implementation of the present invention are described for specific embodiment used herein, above embodiments
Explanation be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (21)
1. a kind of vehicle-mounted hydraulic power generator characterized by comprising
Hydraulic system, the hydraulic system include variable pump (1) and the motor (11) as executive component, the variable pump (1)
It is operably connected with the engine (17) of vehicle；
Generator (18) is connect with the output end of the motor (11)；
Detection part, for obtaining the running parameter of the hydraulic system；And
Control unit, for adjusting the variable according to the running parameter of the hydraulic system when the engine (17) work
It pumps (1), so that the motor (11) works in the rotating speed of target for meeting power generation needs.
2. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the oil outlet of the variable pump (1) with
The oil inlet of the motor (11) is connected to, and the oil outlet of the motor (11) is connected to the inlet port of the variable pump (1), is formed
Closed circuit.
3. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the hydraulic system further includes slippage pump
(8), the slippage pump (8) connect with the engine (17), for the low-pressure side repairing for the variable pump (1) and/or is
The stroking mechanism fuel feeding of the variable pump (1).
4. vehicle-mounted hydraulic power generator according to claim 3, which is characterized in that the slippage pump (8) and the variable
It is integrally disposed to pump (1).
5. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the hydraulic system includes two overflows
Component, it is in parallel with the variable pump (1) after two overflow means series connection, in the output pressure of the variable pump (1) height
After the first preset pressure value, so that high-pressure side hydraulic oil is flowed to low-pressure side by two overflow means and be depressured.
6. vehicle-mounted hydraulic power generator according to claim 5, which is characterized in that the overflow means include in parallel the
One overflow valve and check valve, the check valve in two overflow means is oppositely arranged, so where high-pressure side hydraulic oil passes through
After first overflow valve overflow of side, low-pressure side is flowed to by the check valve in overflow means described in another.
7. vehicle-mounted hydraulic power generator according to claim 5, which is characterized in that the hydraulic system further includes slippage pump
(8) and repairing oil circuit, the repairing oil circuit is equipped with filter (15) and throttle element (6), and the one of the repairing oil circuit
End is connected to the slippage pump (8), the pipeline connection between the other end and two overflow means.
8. vehicle-mounted hydraulic power generator according to claim 1 or 5, which is characterized in that the hydraulic system further includes pressure
Power stop valve (7) is located on the oil circuit where the oil outlet of the variable pump (1), for the output pressure in the variable pump (1)
In the case that power is higher than the second preset pressure value, make high pressure oil off-load to fuel tank (9).
9. vehicle-mounted hydraulic power generator according to claim 8, which is characterized in that the pressure shut-off valve (7) includes the
Two overflow valves (71) and shuttle valve (72), two oil inlets of the shuttle valve (72) respectively with the oil outlet of the variable pump (1) and
Inlet port connection, the oil outlet of the shuttle valve (72) are connected to the control terminal of second overflow valve (71).
10. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the hydraulic system further includes heat exchange
Opening valve (13) is arranged in parallel between the variable pump (1) and the motor (11), in the defeated of the variable pump (1)
Out pressure be higher than third preset pressure value in the case where open so that the oil of the variable pump (1) low-pressure side return to fuel tank (9) into
Row cooling.
11. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the detection part includes that motor turns
Fast detection part (10), for detecting the working speed of the motor (11)；The control unit includes motor rotary speed feedback mould
Block (20) passes through PID arithmetic with the working speed detected for the rotating speed of target according to motor (11) and obtains the first control electricity
Stream, the variable pump (1) to be adjusted, to keep the motor (11) working speed consistent with the rotating speed of target.
12. vehicle-mounted hydraulic power generator according to claim 11, which is characterized in that the motor rotary speed feedback module
It (20) include Kind of Integration Separation PID Controller's, for making the motor by ratio control in the variable pump (1) startup stage
(11) it quickly reaches rotating speed of target, and is made by integral and/or differential control in the variable pump (1) stationary operational phase described
Motor (11) works in rotating speed of target.
13. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the detection part includes:
Pressure detecting part (12), for detecting the operating pressure of the hydraulic system；With
Motor rotary speed detection part (10), for detecting the working speed of the motor (11)；
The control unit includes load compensation module (21), for according to the hydraulic system working pressure and motor detected
(11) working speed obtains the second control electric current, the variable pump (1) to be adjusted, so that the motor (11) be made to work
Revolving speed is consistent with the rotating speed of target, and keeps the variable pump (1) changed power steady.
14. vehicle-mounted hydraulic power generator according to claim 1, which is characterized in that the detection part includes engine
Rotating speed measring component (19), for detecting the working speed of the engine (17)；The control unit includes feedforward compensation mould
Block (22) obtains third control electric current for the working speed according to the engine (17) detected, to start described
When machine (17) working speed amplitude of variation is more than threshold value, according to the engine (17) working speed and variable pump being obtained ahead of time
(1) corresponding relationship of swash plate angle carries out feed-forward regulation to the variable pump (1), to make the work of the motor (11) in advance
It is consistent with the rotating speed of target to make revolving speed.
15. vehicle-mounted hydraulic power generator according to claim 11, which is characterized in that the detection part further include:
Pressure detecting part (12), for detecting the operating pressure of the hydraulic system；With
Engine speed detection part (19), for detecting the working speed of the engine (17)；
The control unit further include:
Load compensation module (21), for obtaining the according to the hydraulic system working pressure that detects and motor (11) working speed
Two control electric currents, so that the motor (11) working speed is kept constant, and keep the variable pump (1) changed power steady；
Feed-forward compensation module (22) obtains third control electricity for the working speed according to the engine (17) detected
Stream, according to the engine (17) working speed being obtained ahead of time and to become in the variation of the engine (17) working speed
The corresponding relationship of amount pump (1) swash plate angle, carries out feed-forward regulation to the variable pump (1), to make the motor (11) in advance
Working speed it is consistent with the rotating speed of target；With
Integral traffic control module (23), it is whole for carrying out the first control electric current, the second control electric current and third control electric current
It closes, and the variable pump (1) is adjusted with the electric current after integrating.
16. a kind of breakdown lorry, which is characterized in that including any vehicle-mounted hydraulic power generator of claim 1~15, institute
Vehicle-mounted hydraulic power generator is stated to be located on the chassis of the breakdown lorry.
17. a kind of control method based on any vehicle-mounted hydraulic power generator of claim 1~15, which is characterized in that packet
It includes:
Detection part obtains the running parameter of the hydraulic system；And
Control unit adjusts the variable pump according to the running parameter of the hydraulic system when the engine (17) work
(1), so that the motor (11) works in the rotating speed of target for meeting power generation needs.
18. vehicle-mounted hydraulic power generator control method according to claim 17, which is characterized in that the detection part packet
It includes motor rotary speed detection part (10), the control unit includes motor rotary speed feedback module (20), and the control method includes:
The working speed of motor rotary speed detection part (10) detection motor (11)；
The motor rotary speed feedback module (20) passes through PID with the working speed detected according to the rotating speed of target of motor (11) and transports
Calculate obtain first control electric current, the variable pump (1) to be adjusted, thus make the motor (11) working speed with it is described
Rotating speed of target is consistent.
19. vehicle-mounted hydraulic power generator control method according to claim 17, which is characterized in that the detection part packet
Include: pressure detecting part (12) and motor rotary speed detection part (10), the control unit include load compensation module (21), institute
Stating control method includes:
The pressure detecting part (12) detects the operating pressure of the hydraulic system；
The motor rotary speed detection part (10) detects the working speed of the motor (11)；
The control unit obtains the second control electricity according to hydraulic system working pressure and motor (11) working speed detected
Stream, the variable pump (1) to be adjusted, thus keep the motor (11) working speed consistent with the rotating speed of target, and
Keep the variable pump (1) changed power steady.
20. vehicle-mounted hydraulic power generator control method according to claim 17, which is characterized in that the detection part packet
It includes engine speed detection part (19), the control unit includes feed-forward compensation module (22), and the control method includes:
The engine speed detection part (19) detects the working speed of the engine (17)；
The feed-forward compensation module (22) obtains third control electric current according to the working speed of the engine (17) detected,
With the engine (17) working speed variation when, according to the engine (17) working speed and variable pump being obtained ahead of time
(1) corresponding relationship of swash plate angle carries out feed-forward regulation to the variable pump (1), to make the work of the motor (11) in advance
It is consistent with the rotating speed of target to make revolving speed.
21. vehicle-mounted hydraulic power generator control method according to claim 18, which is characterized in that the detection part is also
Including pressure detecting part (12) and engine speed detection part (19), the control unit further includes load compensation module
(21), feed-forward compensation module (22) and integral traffic control module (23), the control method further include:
The pressure detecting part (12) detects the operating pressure of the hydraulic system；
The engine speed detection part (19) detects the working speed of the engine (17)；
The load compensation module (21) obtains the according to the hydraulic system working pressure and motor (11) working speed that detect
Two control electric currents, so that the motor (11) working speed is consistent with the rotating speed of target, and become the variable pump (1) power
Change steady；
The feed-forward compensation module (22) obtains third control electric current according to the working speed of the engine (17) detected,
With the engine (17) working speed variation when, according to the engine (17) working speed and variable pump being obtained ahead of time
(1) corresponding relationship of swash plate angle carries out feed-forward regulation to the variable pump (1), to make the work of the motor (11) in advance
It is consistent with the rotating speed of target to make revolving speed；With
The integral traffic control module (23) carries out the first control electric current, the second control electric current and third control electric current whole
It closes, and the variable pump (1) is adjusted with the electric current after integrating.
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