CN106321218B

CN106321218B - Cooling control system, method and excavator

Info

Publication number: CN106321218B
Application number: CN201510328584.XA
Authority: CN
Inventors: 夏书强; 王钦; 费树辉
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2015-06-15
Filing date: 2015-06-15
Publication date: 2019-04-16
Anticipated expiration: 2035-06-15
Also published as: CN106321218A

Abstract

The invention discloses cooling control system, method and excavators.The cooling control system includes: state monitoring apparatus, environment temperature sensor, temperature controller and fan speed-regulating executive device, wherein the state parameter of condition checkout gear measurement heat dissipation object, and the state parameter is transmitted to temperature controller；Environment temperature sensor measures environment temperature, and the environment temperature is transmitted to temperature controller；Temperature controller exports speed regulating control signal to fan speed-regulating executive device according to the state parameter and the environment temperature；Fan speed-regulating executive device is according to speed regulating control Signal Regulation fan actual speed, to radiate, so that the present invention realizes according to the state parameter of heat dissipation object and environment temperature the revolving speed for adjusting fan, it is possible to reduce the power loss of engine improves the working efficiency of excavator.

Description

Cooling control system, method and excavator

Technical field

The present invention relates to engineering machinery fields, in particular to cooling control system, method and excavator.

Background technique

Hydraulic crawler excavator during the work time, the power loss of cooling system to account for engine output 10%~ 15%, and the power loss of cooling system is mainly caused by fan, the consumption of cooling system power and rotation speed of the fan cube at Therefore direct ratio if rotation speed of the fan can be efficiently controlled in the excavator course of work, can greatly reduce the power damage of engine It loses.

Fig. 1 is the structural schematic diagram for showing the cooling system of hydraulic crawler excavator in the prior art.As shown in Figure 1, heat dissipation system System includes: engine 110, fan 120 and radiator 130.The cooling system of excavator radiates mainly by cooling fan air-breathing.Wind Fan 120 and 110 output shaft direct connection of engine.Fan keeps revolving speed identical with engine, so that fan is run at high speed always, exists Higher power consumption works so that the cooling system of excavator is in always under higher load conditions, increases excavation machine oil Consumption.

In addition, engine generally has optimum working temperature, the radiating mode of the direct-connected radiator fan of engine cannot make to send out Motivation and hydraulic system work both will cause power dissipation, also will affect the working efficiency of excavator in optimum temperature range.

For example, making engine radiator remain biggish heat dissipation capacity when radiating fan rotation speed is higher, it can extend and start When machine temperature reaches the time, especially low temperature environment of optimum working temperature, engine warm-up is slow, influences engine operation effect Rate reduces workload, also will cause the excessive power loss during engine warm-up, and make for a long time hydraulic oil be in compared with Low temperature increases hydraulic oil viscosity and flow resistance, reduces hydraulic system working efficiency.

Summary of the invention

The technical problem that present invention needs solve is: the cooling system of the prior art is not adjustable the revolving speed of fan.

According to the first aspect of the invention, a kind of cooling control system is provided, comprising: condition checkout gear, for surveying The state parameter of amount heat dissipation object, and the state parameter is transmitted to temperature controller；Environment temperature sensor, for measuring Environment temperature, and the environment temperature is transmitted to the temperature controller；Temperature controller, according to the state parameter and institute It states environment temperature and exports speed regulating control signal to fan speed-regulating executive device；And fan speed-regulating executive device, for according to institute Speed regulating control Signal Regulation fan actual speed is stated, to radiate.

Further, the fan speed-regulating executive device includes: motor, drives hydraulic pump operating, and from the temperature control Device processed receives the speed regulating control signal, according to the revolving speed of the speed regulating control Signal Regulation hydraulic pump；Hydraulic pump, to silicone oil from Clutch exports silicone oil, and the silicone oil amount exported according to itself rotational speed regulation；Silicon oil clutch, setting engine and fan it Between, according to the silicon fuel-flow control fan actual speed of input.

Further, the state parameter of the heat dissipation object includes: that engine temperature, engine speed and engine output are turned round Square；The temperature controller is by engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}And lower limit Value T_{Send out min}It is compared, and fan target revolving speed is determined according to comparison result, and according to the fan target revolving speed to the wind Fan speed regulation executive device exports speed regulating control signal.

Further, temperature controller determines fan target revolving speed using following methods: if T_Hair<T_{Send out min}, it is determined that the wind Fan the minimum speed that rotating speed of target is fan；If T_{Send out min}≤T_Hair≤T_{Send out max}, it is determined that the fan target revolving speed is according to Engine temperature, the engine speed, the engine output torque and the environment temperature calculate the first fan obtained Rotating speed of target；If T_Hair>T_{Send out max}, it is determined that the fan target revolving speed is the maximum speed of fan.

Further, the temperature controller determines the first fan target revolving speed using following methods: according to the engine Revolving speed and the engine output torque determine engine output；According to the engine output and engine thermal Proportionate relationship between load and engine output determines engine heat load；According to the engine heat load, described Engine temperature and the environment temperature determine the coefficient of heat transfer of engine radiator；According to the heat dissipation of the engine radiator Proportionate relationship between coefficient and the first fan target revolving speed and the coefficient of heat transfer of engine radiator determines first wind Fan rotating speed of target.

Further, the temperature controller, which calculates, obtains the first fan target revolving speed n_{Target 1}Formula include: P_Output= ω_Hair×M_Output, wherein P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Hair=k₁ ×P_Output, wherein Q_HairFor engine heat load, k₁Proportionality coefficient between engine heat load and engine output；Wherein, α_HairFor the coefficient of heat transfer of engine radiator, A_HairFor the heat dissipation of engine radiator Area, T_RingFor environment temperature；And n_{Target 1}=k₃×α_Hair, wherein k₃For dissipating for the first fan target revolving speed and engine radiator Proportionality coefficient between hot coefficient.

Further, the state parameter of the heat dissipation object includes: engine temperature, engine speed, engine output torsion Square and hydraulic fluid temperature；The temperature controller is by engine temperature T_HairRespectively with the upper limit of engine work temperature range Value T_{Send out max}With lower limit value T_{Send out min}It is compared, and by hydraulic fluid temperature T_OilRespectively with hydraulic system normal working temperature range Upper limit value T_{Oily max}With lower limit value T_{Oily min}It is compared, and fan target revolving speed is determined according to comparison result, and according to the fan Rotating speed of target exports speed regulating control signal to the fan speed-regulating executive device.

Further, the temperature controller determines fan target revolving speed using following methods: if T_Hair<T_{Send out min}And T_Oil<T_{Oily min}, Then determine that the fan target revolving speed is the minimum speed of fan；If T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}Or T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}, it is determined that the fan target revolving speed is according to the engine temperature, engine speed, described Engine output torque and the environment temperature calculate the first fan target revolving speed obtained；If T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil< T_{Oily max}Or T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily max}<T_Oil, it is determined that the fan target revolving speed is according to the hydraulic fluid temperature, institute It states engine speed, the engine output torque and the environment temperature and calculates the second fan target revolving speed obtained；If T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily min}≤T_Oil≤T_{Oily max}, then the first fan target revolving speed and second fan target turn Speed determines that the fan target revolving speed is both biggish one；If T_{Send out max}<T_HairAnd T_{Oily max}<T_Oil, it is determined that the fan Rotating speed of target is the maximum speed of fan.

Further, the temperature controller determines the second fan target revolving speed using following methods: according to the engine Revolving speed and the engine output torque determine engine output；According to the engine output and hydraulic system The ratio that thermic load accounts for engine output determines hydraulic system thermic load；According to the hydraulic system thermic load, the liquid Pressure system temperature and the environment temperature determine the coefficient of heat transfer of hydraulic system radiator；According to the hydraulic system radiator Described in proportionate relationship between coefficient of heat transfer and the second fan target revolving speed and the coefficient of heat transfer of hydraulic system radiator determines Second fan target revolving speed.

Further, the temperature controller, which calculates, obtains the second fan target revolving speed n_{Target 2}Formula include: P_Output= ω_Hair×M_Output, wherein P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Oil=k₂ ×P_Output, wherein Q_OilFor hydraulic system thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor dissipating for hydraulic system radiator Heat area, T_RingFor environment temperature；And n_{Target 2}=k₄×α_Oil, wherein k₄For the second fan target revolving speed and hydraulic system radiator Coefficient of heat transfer between proportionality coefficient.

According to the second aspect of the invention, a kind of excavator is provided, comprising: cooling control system as previously described.

According to the third aspect of the invention we, a kind of cooling control method is provided, comprising: the state ginseng of measurement heat dissipation object Several and environment temperature；Speed regulating control signal is exported according to the state parameter and the environment temperature；And according to the speed regulation Signal Regulation fan actual speed is controlled, to radiate.

Further, according to the speed regulating control Signal Regulation fan actual speed, to be radiated the step of includes: use Motor drives hydraulic pump operating, and receives the speed regulating control signal, according to the speed regulating control Signal Regulation hydraulic pump Revolving speed；Silicone oil, and the silicone oil amount exported according to itself rotational speed regulation are exported to silicon oil clutch using the hydraulic pump；It will be described Silicon oil clutch is arranged between engine and fan, according to the silicon fuel-flow control fan actual speed of input.

It further, include: described according to the step of state parameter and environment temperature output speed regulating control signal The state parameter of heat dissipation object includes: engine temperature, engine speed and engine output torque；By engine temperature T_HairPoint Not with the upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}It is compared, and is determined according to comparison result Fan target revolving speed, and speed regulating control signal is exported to the fan speed-regulating executive device according to the fan target revolving speed.

Further, fan target revolving speed is determined using following methods: if T_Hair<T_{Send out min}, it is determined that the fan target revolving speed For the minimum speed of fan；If T_{Send out min}≤T_Hair≤T_{Send out max}, it is determined that the fan target revolving speed be according to the engine temperature, The engine speed, the engine output torque and the environment temperature calculate the first fan target revolving speed obtained；If T_Hair>T_{Send out max}, it is determined that the fan target revolving speed is the maximum speed of fan.

Further, according to the engine temperature, the engine speed, the engine output torque and the environment The step of temperature computation the first fan target revolving speed of acquisition includes: according to the engine speed and the engine output torque Determine engine output；According between the engine output and engine heat load and engine output Proportionate relationship determine engine heat load；According to the engine heat load, the engine temperature and the environment temperature Determine the coefficient of heat transfer of engine radiator；According to the coefficient of heat transfer of the engine radiator and the first fan target revolving speed Proportionate relationship between the coefficient of heat transfer of engine radiator determines the first fan target revolving speed.

Further, it calculates and obtains the first fan target revolving speed n_{Target 1}Formula include: P_Output=ω_Hair×M_Output, wherein P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Hair=k₁×P_Output, wherein Q_HairFor Engine heat load, k₁Proportionality coefficient between engine heat load and engine output；Wherein, α_HairFor the coefficient of heat transfer of engine radiator, A_HairFor the heat dissipation of engine radiator Area, T_RingFor environment temperature；And n_{Target 1}=k₃×α_Hair, wherein k₃For dissipating for the first fan target revolving speed and engine radiator Proportionality coefficient between hot coefficient.

It further, include: described according to the step of state parameter and environment temperature output speed regulating control signal The state parameter of heat dissipation object includes: engine temperature, engine speed, engine output torque and hydraulic fluid temperature；It will hair Motivation temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}It is compared, and will Hydraulic fluid temperature T_OilRespectively with the upper limit value T of hydraulic system normal working temperature range_{Oily max}With lower limit value T_{Oily min}It is compared, and Fan target revolving speed is determined according to comparison result, and is exported according to the fan target revolving speed to the fan speed-regulating executive device Speed regulating control signal.

Further, fan target revolving speed is determined using following methods: if T_Hair<T_{Send out min}And T_Oil<T_{Oily min}, it is determined that the fan Rotating speed of target is the minimum speed of fan；If T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}Or T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}, Then determine that the fan target revolving speed is according to the engine temperature, the engine speed, the engine output torque The the first fan target revolving speed obtained is calculated with the environment temperature；If T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}Or T_{Send out min}≤T_Hair ≤T_{Send out max}And T_{Oily max}<T_Oil, it is determined that the fan target revolving speed is according to the hydraulic fluid temperature, the engine speed, institute It states engine output torque and the environment temperature calculates the second fan target revolving speed obtained；If T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily min}≤T_Oil≤T_{Oily max}, then the first fan target revolving speed and the second fan target revolving speed, determine the fan Rotating speed of target is both biggish one；If T_{Send out max}<T_HairAnd T_{Oily max}<T_Oil, it is determined that the fan target revolving speed is fan Maximum speed.

Further, according to the hydraulic fluid temperature, the engine speed, the engine output torque and the environment The step of temperature computation the second fan target revolving speed of acquisition includes: according to the engine speed and the engine output torque Determine engine output；Engine output is accounted for according to the engine output and hydraulic system thermic load Ratio determines hydraulic system thermic load；According to the hydraulic system thermic load, the hydraulic system temperature and the environment temperature Determine the coefficient of heat transfer of hydraulic system radiator；According to the coefficient of heat transfer and the second fan target of the hydraulic system radiator Proportionate relationship between revolving speed and the coefficient of heat transfer of hydraulic system radiator determines the second fan target revolving speed.

Further, it calculates and obtains the second fan target revolving speed n_{Target 2}Formula include: P_Output=ω_Hair×M_Output, wherein P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Oil=k₂×P_Output, wherein Q_OilFor Hydraulic system thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor dissipating for hydraulic system radiator Heat area, T_RingFor environment temperature；And n_{Target 2}=k₄×α_Oil, wherein k₄For the second fan target revolving speed and hydraulic system radiator Coefficient of heat transfer between proportionality coefficient.

The present invention realizes according to the state parameter of heat dissipation object and environment temperature the revolving speed for adjusting fan, it is possible to reduce The power loss of engine improves the working efficiency of excavator.

By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its Advantage will become apparent.

Detailed description of the invention

The attached drawing for constituting part of specification describes the embodiment of the present invention, and together with the description for solving Release the principle of the present invention.

The present invention can be more clearly understood according to following detailed description referring to attached drawing, in which:

Fig. 1 is the structural schematic diagram for showing the cooling system of hydraulic crawler excavator in the prior art.

Fig. 2 is the structural schematic diagram for showing cooling control system according to some embodiments of the invention.

Fig. 3 is the structural schematic diagram for showing the cooling control system of other embodiments according to the present invention.

Fig. 4 is the flow chart for showing cooling control method according to some embodiments of the invention.

Specific embodiment

Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally The range of invention.

Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality Proportionate relationship draw.

Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention And its application or any restrictions used.

Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as authorizing part of specification.

It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.

Fig. 2 is the structural schematic diagram for showing cooling control system according to some embodiments of the invention.As shown in Fig. 2, dissipating Thermal control system 200 includes: that condition checkout gear 201, environment temperature sensor 202, temperature controller 203 and fan speed-regulating are held Luggage sets 204, wherein condition checkout gear 201, environment temperature sensor 202 and fan speed-regulating executive device 204 respectively with temperature It spends controller 203 to be electrically connected, such as connects or be wirelessly connected by data line.For illustrative purposes, it is also shown in Fig. 2 Engine 210, fan 220 and radiator 230.Radiator 230 may include: engine radiator and/or hydraulic system heat dissipation Device.

Condition checkout gear 201 is used to measure the state parameter of heat dissipation object, and the state parameter is transmitted to temperature control Device 203 processed.

Environment temperature sensor 202 (such as being mounted on outside excavator) is for measuring environment temperature, and by the environment temperature Degree is transmitted to temperature controller 203.Environment temperature can be monitored in real time by access environment temperature sensor, introduce environment temperature Influence to heat dissipation improves excavator to the adaptability of environment.

203 reception state parameter of temperature controller and environment temperature, according to the state parameter and the environment temperature to fan It adjusts the speed executive device 204 and exports speed regulating control signal.For example, temperature controller can be obtained according to state parameter and environment temperature Fan target revolving speed, and speed regulating control signal is exported to fan speed-regulating executive device according to the fan target revolving speed.Pass through access Temperature controller can obtain the temperature of certain heat dissipation object (such as engines, hydraulic system) and environment in real time, and according to upper It states temperature value and carries out corresponding rotation speed of the fan adjusting, guarantee the constant of excavator operating temperature.

Fan speed-regulating executive device 204 is used for according to speed regulating control Signal Regulation fan actual speed, to radiate.Such as Shown in Fig. 2, engine 210 drives fan 220 to operate, and fan speed-regulating executive device 204 is arranged in engine 210 and fan 220 Between, the revolving speed of fan is adjusted by fan speed-regulating executive device 204.

In this embodiment, the state ginseng of heat dissipation object is measured respectively by condition checkout gear and environment temperature sensor Several and environment temperature, and these data are transmitted to temperature controller, temperature controller is according to the state parameter and environment of acquisition Temperature exports speed regulating control signal to fan speed-regulating executive device, and fan speed-regulating executive device is according to the speed regulating control Signal Regulation Fan actual speed adjusts fan to realize according to the state parameter of heat dissipation object and environment temperature to radiate Revolving speed, it is possible to reduce the power loss of engine improves the working efficiency of excavator.

In some embodiments of the invention, temperature controller can be realized by hardware, for example, temperature controller can be with Include: rotating speed of target determination unit, fan target revolving speed is determined according to state parameter and environment temperature；And PID (Proportion Integration Differentiation, proportional integral differential) unit, with rotating speed of target determination unit Connection exports speed regulating control signal to fan speed-regulating executive device according to fan target revolving speed.

In one embodiment, state parameter includes: engine temperature；Rotating speed of target determination unit includes: comparing unit, The comparison engine temperature size with the upper limit value of engine work temperature range and lower limit value respectively, according to comparison result Export corresponding signal.The comparing unit can be comparator or the unit assembled by comparator.For example, the comparing unit It can be the comparator at least three input terminals He at least one output end, wherein three input terminals input engine respectively Temperature T_Hair, engine work temperature range upper limit value T_{Send out max}With lower limit value T_{Send out min}, the comparator after comparison, according to Different results exports corresponding digital signal in output end, for example, T_Hair<T_{Send out min}When export 01, T_{Send out min}≤T_Hair≤T_{Send out max}When it is defeated Out 10, T_Hair>T_{Send out max}When export 11, these digital signals can represent fan target revolving speed, and different digital signal representations is different Fan target revolving speed.These digital signals are input to PID unit, and PID unit exports speed regulating control according to these digital signals Signal.

In another embodiment, state parameter includes: engine temperature and hydraulic fluid temperature；Rotating speed of target determination unit It include: comparing unit, comparison engine temperature is big with the upper limit value of engine work temperature range and lower limit value respectively It is small, and compare size of the hydraulic fluid temperature respectively with the upper limit value of hydraulic system normal working temperature range and lower limit value, according to Comparison result exports corresponding signal.The comparing unit can be comparator or the unit assembled by comparator.For example, should Comparing unit can be the comparator at least six input terminals He at least one output end, and six of them input terminal difference is defeated Enter engine temperature T_Hair, engine work temperature range upper limit value T_{Send out max}With lower limit value T_{Send out min}And hydraulic fluid temperature T_OilWith the upper limit value T of hydraulic system normal working temperature range_{Oily max}With lower limit value T_{Oily min}.The comparator after comparison, according to Different results exports corresponding digital signal in output end, for example, T_Hair<T_{Send out min}And T_Oil<T_{Oily min}When, output 000, T_{Send out min}≤T_Hair <T_{Send out max}And T_Oil<T_{Oily min}When export 001, T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}When show 010, etc., those skilled in the art can To understand, for other situations, comparing unit can be set and export different digital signals.These digital signals can represent wind Fan rotating speed of target, the different fan target revolving speed of different digital signal representations.These digital signals are input to PID unit, PID Unit exports speed regulating control signal according to these digital signals.

Fig. 3 is the structural schematic diagram for showing the cooling control system of other embodiments according to the present invention.As shown in figure 3, Cooling control system 300 includes: condition checkout gear 301, environment temperature sensor 302, temperature controller 303 and fan speed-regulating Executive device 304.Here, condition checkout gear 301, environment temperature sensor 302, temperature controller 303 and fan speed-regulating are held Luggage set 304 respectively with condition checkout gear 201, environment temperature sensor 202, temperature controller 203 and the fan tune in Fig. 2 Fast executive device 204 is similar.For illustrative purposes, engine 310, fan 320 and radiator 330 are also shown in Fig. 3.It dissipates Hot device 330 may include: engine radiator and/or hydraulic system radiator.

In some embodiments, as shown in figure 3, fan speed-regulating executive device 304 may include: motor 3041, it is hydraulic Pump 3042 (such as constant displacement pump or variable pumps) and silicon oil clutch 3043.Wherein, motor 3041 is electrically connected with temperature controller 303 It connects, such as connects or be wirelessly connected by data line；Motor 3041 and hydraulic pump 3042 are coaxially connected；Hydraulic pump 3042 is logical Oil circuit is crossed to connect with silicon oil clutch 3043.Hydraulic pump can be carried out according to the specification of silicon oil clutch and the matching of motor is selected It selects.

Motor 3041 drives hydraulic pump 3042 to operate, and receives speed regulating control signal from temperature controller 303, according to tune The revolving speed of speed control Signal Regulation hydraulic pump 3042；Hydraulic pump 3042 exports silicone oil to silicon oil clutch 3043, and according to itself The silicone oil amount of rotational speed regulation output is (for example, hydraulic pump can be using constant displacement pump uninterrupted pumping, variable pump pumping or increase series connection The modes such as constant displacement pump quantity realize the adjusting to silicone oil flow)；Silicon oil clutch 3043 is arranged in engine 310 and fan Between 320, according to the silicon fuel-flow control fan actual speed of input.

In this embodiment, driven by engine fan running, fan are held to radiator (such as engine radiator) blowing Silicon oil clutch is arranged in row heat dissipation between engine and fan, and the free end output of engine is pivotally connected to silicon oil clutch, Silicon oil clutch is coaxially connected with fan, and silicon oil clutch passes through silicone oil in control silicon oil clutch using silicone oil as working media The size of flow can control rotation speed of the fan step-less adjustment, the size and rotation speed of the fan direct proportionality (example of silicone oil flow Such as, the silicone oil amount of hydraulic pump input silicon oil clutch is bigger, and the viscous force of silicon oil clutch is bigger, and the effect of torque transmitting is got over Good, rotation speed of the fan is bigger).Temperature controller by motor output speed regulating control signal (for example, PWM (Pulse Width Modulation, pulse width modulation) signal), the revolving speed of motor is adjusted, and then adjust hydraulic pump and be input to silicon oil clutch Silicone oil amount, realize the continuous control of silicone oil flow, and then realize that rotation speed of the fan continuously adjusts, increase rotation speed of the fan adjusting Reliability and stability.

By devices such as access silicon oil clutch, realizes and stepless speed regulation is carried out to fan, with fan and the direct-connected phase of engine Than, it is possible to reduce the excessive power consumption of fan in engine or hydraulic system temperature-rise period realizes engine or hydraulic system To the Precise control of rotation speed of the fan within the scope of optimum working temperature, it is further reduced the power of fan consumption.Pass through access The devices such as silicon oil clutch can control engine and hydraulic system work in optimum temperature range, improve the work of excavator Make efficiency.

In further embodiments, fan, silicon oil clutch, motor and hydraulic pressure pump group can be known as silicone oil altogether Clutch fan.Temperature controller directly exports speed regulating control signal to silicon oil clutch fan according to state parameter and environment temperature, To adjust the revolving speed of wherein fan.

In an embodiment of the present invention, as shown in figure 3, cooling control system 300 can also include: fan speed sensor 305, it is electrically connected (such as connect or be wirelessly connected by data line) with temperature controller 303, fan speed sensor peace On fan, temperature controller 303 is transmitted to for measuring fan actual speed, and by fan actual speed；Wherein, temperature Controller 303 judges whether the fan actual speed is equal with fan target revolving speed, if unequal, in real time to fan speed-regulating Executive device 304 exports speed regulating control signal, until adjusting fan actual speed to equal with fan target revolving speed.For example, Temperature controller carries out logic judgment to fan target revolving speed and fan actual speed, if the two difference is larger, temperature control Device adjusts speed regulating control signal again, until the two reaches unanimity.It may be implemented by accessing fan speed sensor The closed-loop control of rotation speed of the fan, adjusts rotation speed of the fan in real time, improves the radiating efficiency of excavator cooling system.

In some embodiments, as shown in figure 3, condition checkout gear 301 may include: engine ECM (Engine Control Module, engine control module) 3011, it is electrically connected (such as connecting by CAN bus) with temperature controller 303, Temperature controller 303 is transmitted to for measuring the state parameter of engine, and by the state parameter；Wherein, the state parameter packet It includes: engine temperature, engine speed and engine output torque.Temperature controller obtains engine by engine ECM Temperature, revolving speed and output torque, and combining environmental temperature controls fan speed-regulating executive device, to adjust fan reality Revolving speed.

In some embodiments, the state parameter of object of radiating includes: that engine temperature, engine speed and engine are defeated Torque out；Temperature controller 303 is by engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With Lower limit value T_{Send out min}It is compared, and fan target revolving speed is determined according to comparison result.

In some embodiments, if T_Hair<T_{Send out min}, it is determined that fan target revolving speed is the minimum speed of fan；If T_{Send out min}≤T_Hair ≤T_{Send out max}, it is determined that fan target revolving speed is according to engine temperature, engine speed, engine output torque and environment temperature Calculate the first fan target revolving speed obtained；If T_Hair>T_{Send out max}, it is determined that fan target revolving speed is the maximum speed of fan.

In this embodiment, cooling control system control rotation speed of the fan radiates to engine radiator.Work as T_Hair<T_{Send out min} When, in order to improve working efficiency, engine, which needs to heat up as early as possible, reaches its normal working temperature range, therefore fan target is arranged Revolving speed is the minimum speed of fan, by controlling to adjust, so that fan is operated with minimum speed, to heat up quickly；When T_{Send out min}≤T_Hair≤T_{Send out max}When, engine temperature within the scope of normal working temperature, at this moment needs fan to adapt to engine The rotation speed operation of temperature and environment temperature can control turning for fan according to above-mentioned engine state parameters and environment temperature Speed；Work as T_Hair>T_{Send out max}When, indicating oven temperature of engine needs engine to cool down as early as possible, therefore it is fan that fan target revolving speed, which is arranged, Maximum speed, by controlling to adjust, so that fan is operated with maximum speed, to make engine cooling as early as possible.

In some embodiments, it includes: temperature control that temperature controller, which calculates and obtains the process of the first fan target revolving speed, Device determines engine output according to engine speed and engine output torque；According to engine output and start Proportionate relationship between machine-heating load and engine output determines engine heat load；According to engine heat load, start Machine temperature and environment temperature determine the coefficient of heat transfer of engine radiator；According to the coefficient of heat transfer of engine radiator and first Proportionate relationship between fan target revolving speed and the coefficient of heat transfer of engine radiator determines the first fan target revolving speed.

For example, temperature controller, which calculates, obtains the first fan target revolving speed n_{Target 1}Formula include: P_Output=ω_Hair×M_Output, Wherein, P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Hair=k₁×P_Output, In, Q_HairFor engine heat load, k₁Proportionality coefficient between engine heat load and engine output；Wherein, α_HairFor the coefficient of heat transfer of engine radiator, A_HairFor the heat dissipation of engine radiator Area, T_HairFor engine temperature, T_RingFor environment temperature；And n_{Target 1}=k₃×α_Hair, wherein k₃For the first fan target revolving speed with Proportionality coefficient between the coefficient of heat transfer of engine radiator.

In this embodiment, temperature controller calculates the first fan target revolving speed n_{Target 1}Process it is as follows:

(1) temperature controller obtains engine speed ω by engine ECM_HairWith engine output torque M_Output, according to P_Output=ω_Hair×M_OutputObtain engine output P_Output。

(2) due to carrying out cooling engine heat load Q using radiator_HairWith engine output P_OutputIt is proportional, from And obtain Q_Hair=k₁×P_Output, k₁Proportionality coefficient between engine heat load and engine output, can be according to specific Operating condition determines, such as can determine k by calculating or limited trials according to type selecting of engine etc.₁。

(3) simultaneously, Q_HairWith α_Hair、A_HairAnd T_Hair-T_RingExistence function relationship Q_Hair=f { α_Hair,A_Hair,(T_Hair-T_Ring), for example, Q_Hair=α_Hair ×A_Hair×(T_Hair-T_Ring), to obtainWherein, A_HairIt can be determined by measurement etc., T_HairWith T_RingIt can be obtained respectively by engine ECM and environment temperature sensor.

(4)α_HairIt is directly proportional to rotation speed of the fan for the coefficient of heat transfer of engine radiator, and with radiator material and radiator Cored structure is related, and after radiator determines, the principal element for influencing its variation is rotation speed of the fan, therefore available first fan Rotating speed of target n_{Target 1}=k₃×α_Hair, k₃For the ratio system between the first fan target revolving speed and the coefficient of heat transfer of engine radiator Number can be determined according to specific operating condition, for example, can be determined according to type selecting of radiator etc. by calculating or limited trials k₃。

In further embodiments, if T_Hair<T_{Send out min}, it is determined that fan target revolving speed is the minimum speed of fan；If T_{Send out min} ≤T_Hair≤T_{Send out max}, it is determined that fan target revolving speed is preset value, or is one group of preset value corresponding from different engine temperatures； If T_Hair>T_{Send out max}, it is determined that fan target revolving speed is the maximum speed of fan.

In further embodiments, as shown in figure 3, condition checkout gear 301 can also include: hydraulic oil temperature sensor 3012 (such as being mounted on the oil inlet of hydraulic system radiator), be electrically connected with temperature controller 303 (such as pass through data line Connection is wirelessly connected), temperature control is transmitted to for measuring the hydraulic fluid temperature of hydraulic system, and by the hydraulic fluid temperature Device 303；Wherein, state parameter further include: hydraulic fluid temperature.Temperature controller by engine ECM obtain engine temperature, Revolving speed and output torque obtain the temperature of hydraulic oil in hydraulic system, and combining environmental temperature by hydraulic oil temperature sensor Fan speed-regulating executive device is controlled, to adjust fan actual speed.

In some embodiments, the state parameter of object of radiating includes: that engine temperature, engine speed, engine are defeated Torque and hydraulic fluid temperature out；Temperature controller is by engine temperature T_HairRespectively with the upper limit of engine work temperature range Value T_{Send out max}With lower limit value T_{Send out min}It is compared, and by hydraulic fluid temperature T_OilRespectively with hydraulic system normal working temperature range Upper limit value T_{Oily max}With lower limit value T_{Oily min}It is compared, and fan target revolving speed is determined according to comparison result.

In some embodiments, when engine temperature and hydraulic system temperature are respectively less than its respective normal working temperature model When the lower limit value enclosed, determine that fan target revolving speed is the minimum speed of fan；As engine temperature T_HairWith hydraulic system temperature T_Oil A temperature value in the two within the scope of its corresponding normal working temperature, and another temperature value not its accordingly just When in normal operating temperature range, then fan target revolving speed is determined according to engine temperature and hydraulic system temperature alternative one, So that the relevant temperature value (such as engine temperature or hydraulic system temperature) being located within the scope of its normal working temperature is as far as possible It keeps within this temperature range, without another temperature value (such as the hydraulic system being located within the scope of its normal working temperature Temperature or engine temperature) it heats up or is cooled within the scope of its normal working temperature；When engine temperature and hydraulic system temperature When being all larger than the upper limit value of its respective normal working temperature range, determine that fan target revolving speed is the maximum speed of fan.

For example, can determine fan target revolving speed according to following temperature conditions:

If T_Hair<T_{Send out min}And T_Oil<T_{Oily min}, since engine temperature and hydraulic system temperature are lower at this time, it is thus determined that wind The minimum speed that rotating speed of target is fan is fanned, so that engine and hydraulic system can be warming up to normal temperature range as early as possible.

If T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}Or T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}, it is determined that fan target turns Speed is according to the first fan target of engine temperature, engine speed, engine output torque and environment temperature calculating acquisition Revolving speed.Here, work as T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}When determine fan target revolving speed be above-mentioned first fan target revolving speed, can To make hydraulic system temperature as early as possible in the case where taking into account is maintained at engine temperature as far as possible within the scope of its normal working temperature It is warming up within the scope of the normal working temperature of hydraulic system；Work as T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}When determine fan target turn Speed is above-mentioned first fan target revolving speed, hydraulic system temperature can be made to be maintained at its normal working temperature range as far as possible taking into account In the case where interior, it is cooled to engine temperature within the scope of the normal working temperature of engine as early as possible.

If T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}Or T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily max}<T_Oil, it is determined that fan target turns Speed is according to the second fan target of hydraulic fluid temperature, engine speed, engine output torque and environment temperature calculating acquisition Revolving speed.Here, work as T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}When determine fan target revolving speed be above-mentioned second fan target revolving speed, can To make engine temperature as early as possible in the case where taking into account is maintained at hydraulic system temperature as far as possible within the scope of its normal working temperature It is warming up within the scope of the normal working temperature of engine；Work as T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily max}<T_OilWhen determine fan target revolving speed For the second fan target revolving speed, the situation for being maintained at engine temperature as far as possible within the scope of its normal working temperature can taken into account Under, make within the scope of hydraulic system greenhouse cooling to the normal working temperature of hydraulic system as early as possible.

If T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily min}≤T_Oil≤T_{Oily max}, since engine radiator and hydraulic system radiator are strings Connection is placed, and in order to meet the heat dissipation needs of engine and hydraulic system simultaneously, then compares the first fan target revolving speed and the second wind Rotating speed of target is fanned, determines that fan target revolving speed is both biggish one, so that engine and hydraulic system dissipate Heat needs to be met.

If T_{Send out max}<T_HairAnd T_{Oily max}<T_Oil, since the temperature of engine and hydraulic system is excessively high, it is thus determined that fan target Revolving speed is the maximum speed of fan, the temperature of engine and hydraulic system is reduced to normal temperature range as early as possible.

In this embodiment, cooling control system control rotation speed of the fan is equal to engine radiator and hydraulic system radiator It is radiated (for example, engine radiator and hydraulic system radiator tandem share a fan 320), thus needs to combine hair Motivation temperature and hydraulic system temperature determine the fan target revolving speed under above-mentioned various temperature conditions, by control hydraulic pump defeated Out to the silicone oil amount of silicon oil clutch, so that the actual speed to fan is adjusted.Further, cooling control system according to The thermic load of the output power excavator of excavator, and then radiating requirements can be met under different operating conditions, it improves Adaptability of the excavator cooling system to operating condition.

It has been described in detail before calculation formula and process about the first fan target revolving speed, the second fan target is described below The calculation formula and process of revolving speed.

The process that temperature controller calculates the second fan target revolving speed includes: temperature controller according to engine speed and hair Motivation output torque determines engine output；It is defeated that engine is accounted for according to engine output and hydraulic system thermic load The ratio of power determines hydraulic system thermic load out；It is determined according to hydraulic system thermic load, hydraulic system temperature and environment temperature The coefficient of heat transfer of hydraulic system radiator；According to the coefficient of heat transfer of hydraulic system radiator and the second fan target revolving speed and liquid The proportionate relationship between the coefficient of heat transfer of system radiating device is pressed to determine the second fan target revolving speed.

For example, temperature controller, which calculates, obtains the second fan target revolving speed n_{Target 2}Formula include: P_Output=ω_Hair×M_Output, Wherein, P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Oil=k₂×P_Output, In, Q_OilFor hydraulic system thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor dissipating for hydraulic system radiator Heat area, T_OilFor hydraulic fluid temperature, T_RingFor environment temperature；And n_{Target 2}=k₄×α_Oil, wherein k₄For the second fan target revolving speed Proportionality coefficient between the coefficient of heat transfer of hydraulic system radiator.

In this embodiment, temperature controller calculates the second fan target revolving speed n_{Target 2}Process it is as follows:

(2) according to carrying out cooling hydraulic system thermic load Q using radiator_OilAccount for engine output P_OutputRatio, Obtain Q_Oil=k₂×P_Output, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load, can based on experience value into Row value, such as, it is generally recognized that the efficiency of hydraulic system is 75%, then Q_OilThe 25% of engine output is accounted for, that is, takes k₂For 0.25。

(3) simultaneously, Q_OilWith α_Oil、A_OilAnd T_Oil-T_RingExistence function relationship Q_Oil=f { α_Oil,A_Oil,(T_Oil-T_Ring), for example, Q_Oil=α_Oil ×A_Oil×(T_Oil-T_Ring), to obtainWherein, A_OilIt can be determined by measurement etc., T_OilAnd T_Ring It can be obtained respectively by hydraulic oil temperature sensor and environment temperature sensor.

(4)α_OilIt is directly proportional to rotation speed of the fan for the coefficient of heat transfer of hydraulic system radiator, and with radiator material and heat dissipation Device cored structure is related, and after radiator determines, the principal element for influencing its variation is rotation speed of the fan, therefore available second wind Fan rotating speed of target n_{Target 2}=k₄×α_Oil, k₄For the ratio between the second fan target revolving speed and the coefficient of heat transfer of hydraulic system radiator Example coefficient, can according to specific operating condition determine, for example, can according to type selecting of radiator etc. by calculate or limited trials come Determine k₄。

In an embodiment of the present invention, there is temperature controller pid control function to look into after obtaining fan target revolving speed Look for the corresponding pass of fan target revolving speed and proportionality coefficient kp, integration time constant TI, derivative time constant TD these three pid parameters System obtains kp, TI and TD corresponding with said fans rotating speed of target, thus according to parameter kp, TI and TD obtain input signal and The relationship of output signal, to export speed regulating control signal to fan speed-regulating executive device.

For example, the corresponding relationship for obtaining fan target revolving speed and pwm signal can be tested in advance, i.e., experiment obtains wind in advance The corresponding relationship of rotating speed of target and above three pid parameter size is fanned, and is stored in temperature controller；When temperature controller obtains After obtaining fan target revolving speed, above-mentioned relation is searched, to obtain the analog value of kp, TI and TD, and then obtains corresponding PWM letter Number, i.e. speed regulating control signal.

The present invention also provides a kind of excavators, comprising: cooling control system as elucidated before, for example, shown in Fig. 2 Cooling control system 200 or radiating control device 300 shown in Fig. 3.

Step S401, the state parameter and environment temperature of measurement heat dissipation object.

Step S403 exports speed regulating control signal according to state parameter and environment temperature.For example, according to state parameter and ring Border temperature obtains fan target revolving speed, and exports speed regulating control signal according to the fan target revolving speed.

Step S405, according to speed regulating control Signal Regulation fan actual speed, to radiate.

In this embodiment, for example, heat dissipation pair can be measured respectively with adoption status detection device and environment temperature sensor The state parameter and environment temperature of elephant, then can be practical to fan according to state parameter and environment temperature using temperature controller Revolving speed is adjusted, and this method can reduce the power loss of engine, improves the working efficiency of excavator.

In some embodiments, according to speed regulating control Signal Regulation fan actual speed, to be radiated the step of includes: Hydraulic pump operating is driven using motor, and receives speed regulating control signal, according to the revolving speed of speed regulating control Signal Regulation hydraulic pump； Silicone oil, and the silicone oil amount exported according to itself rotational speed regulation are exported to silicon oil clutch using hydraulic pump；Silicon oil clutch is set It sets between engine and fan, according to the silicon fuel-flow control fan actual speed of input.

In some embodiments, cooling control method further include: measurement fan actual speed；Judge the fan actual speed It is whether equal with fan target revolving speed, if unequal, speed regulating control signal is exported in real time, until by fan actual speed tune It is whole extremely equal with fan target revolving speed.

In some embodiments, the step of state parameter of measurement heat dissipation object includes: the state parameter for measuring engine； Wherein, which includes: engine temperature, engine speed and engine output torque.

In some embodiments, the step of obtaining fan target revolving speed according to state parameter and environment temperature includes: heat dissipation The state parameter of object includes: engine temperature, engine speed and engine output torque；By engine temperature T_HairRespectively with The upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}It is compared, and fan is determined according to comparison result Rotating speed of target.

In some embodiments, if T_Hair<T_{Send out min}, it is determined that fan target revolving speed is the minimum speed of fan；If T_{Send out min}≤ T_Hair≤T_{Send out max}, it is determined that fan target revolving speed is according to engine temperature, engine speed, engine output torque and environment temperature Degree calculates the first fan target revolving speed obtained；If T_Hair>T_{Send out max}, it is determined that fan target revolving speed is the maximum speed of fan.

In some embodiments, it is calculated according to engine temperature, engine speed, engine output torque and environment temperature The step of obtaining the first fan target revolving speed includes: to determine engine output work according to engine speed and engine output torque Rate；Engine is determined according to the proportionate relationship between engine output and engine heat load and engine output Thermic load；The coefficient of heat transfer of engine radiator is determined according to engine heat load, engine temperature and environment temperature；According to hair Ratio between the coefficient of heat transfer of motivation radiator and the first fan target revolving speed and the coefficient of heat transfer of engine radiator is closed It is to determine the first fan target revolving speed.

In some embodiments, it calculates and obtains the first fan target revolving speed n_{Target 1}Formula include: P_Output=ω_Hair× M_Output, wherein P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Hair=k₁×P_Output, Wherein, Q_HairFor engine heat load, k₁Proportionality coefficient between engine heat load and engine output；Wherein, α_HairFor the coefficient of heat transfer of engine radiator, A_HairFor the heat dissipation of engine radiator Area, T_RingFor environment temperature；And n_{Target 1}=k₃×α_Hair, wherein k₃For dissipating for the first fan target revolving speed and engine radiator Proportionality coefficient between hot coefficient.

In some embodiments, the step of state parameter of measurement heat dissipation object further include: measure the hydraulic of hydraulic system Oil temperature；Wherein, state parameter further include: hydraulic fluid temperature.

In some embodiments, the step of obtaining fan target revolving speed according to state parameter and environment temperature includes: heat dissipation The state parameter of object includes: engine temperature, engine speed, engine output torque and hydraulic fluid temperature；By engine Temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}It is compared, and will be hydraulic Oil temperature T_OilRespectively with the upper limit value T of hydraulic system normal working temperature range_{Oily max}With lower limit value T_{Oily min}It is compared, and according to Comparison result determines fan target revolving speed.

In some embodiments, if T_Hair<T_{Send out min}And T_Oil<T_{Oily min}, it is determined that fan target revolving speed is the minimum speed of fan； If T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}Or T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}, it is determined that according to fan target revolving speed Engine temperature, engine speed, engine output torque and environment temperature calculate the first fan target revolving speed obtained；If T_Hair <T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}Or T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily max}<T_Oil, it is determined that fan target revolving speed is according to hydraulic Oil temperature, engine speed, engine output torque and environment temperature calculate the second fan target revolving speed obtained；If T_{Send out min}≤ T_Hair≤T_{Send out max}And T_{Oily min}≤T_Oil≤T_{Oily max}, then compare the first fan target revolving speed and the second fan target revolving speed, determine fan mesh Marking revolving speed is both biggish one；If T_{Send out max}<T_HairAnd T_{Oily max}<T_Oil, it is determined that fan target revolving speed is the highest of fan Revolving speed.

In some embodiments, it is calculated according to hydraulic fluid temperature, engine speed, engine output torque and environment temperature The step of obtaining the second fan target revolving speed includes: to determine engine output work according to engine speed and engine output torque Rate；Determine that hydraulic system heat is negative according to the ratio that engine output and hydraulic system thermic load account for engine output Lotus；The coefficient of heat transfer of hydraulic system radiator is determined according to hydraulic system thermic load, the hydraulic system temperature and environment temperature； According to the coefficient of heat transfer of the coefficient of heat transfer of hydraulic system radiator and the second fan target revolving speed and hydraulic system radiator it Between proportionate relationship determine the second fan target revolving speed.

In some embodiments, it calculates and obtains the second fan target revolving speed n_{Target 2}Formula include: P_Output=ω_Hair×M_Output, Wherein, P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；Q_Oil=k₂×P_Output, In, Q_OilFor hydraulic system thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor dissipating for hydraulic system radiator Heat area, T_RingFor environment temperature；And n_{Target 2}=k₄×α_Oil, wherein k₄For the second fan target revolving speed and hydraulic system radiator Coefficient of heat transfer between proportionality coefficient.

In some embodiments, the step of exporting speed regulating control signal according to fan target revolving speed includes: to obtain fan After rotating speed of target, search fan target revolving speed and proportionality coefficient kp, integration time constant TI, derivative time constant TD these three The corresponding relationship of pid parameter obtains kp, TI and TD corresponding with the fan target revolving speed, to export speed regulating control signal.

So far, the present invention is described in detail.In order to avoid covering design of the invention, it is public that this field institute is not described The some details known.Those skilled in the art as described above, completely it can be appreciated how implementing technology disclosed herein Scheme.

Method and system of the invention may be achieved in many ways.For example, can by software, hardware, firmware or Software, hardware, firmware any combination realize method and system of the invention.The said sequence of the step of for the method Merely to be illustrated, the step of method of the invention, is not limited to sequence described in detail above, special unless otherwise It does not mentionlet alone bright.In addition, in some embodiments, also the present invention can be embodied as to record program in the recording medium, these programs Including for realizing machine readable instructions according to the method for the present invention.Thus, the present invention also covers storage for executing basis The recording medium of the program of method of the invention.

Although some specific embodiments of the invention are described in detail by example, the skill of this field Art personnel it should be understood that above example merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair Bright range is defined by the following claims.

Claims

1. a kind of cooling control system characterized by comprising

The state parameter for measuring the state parameter of heat dissipation object, and is transmitted to temperature controller by condition checkout gear；

Environment temperature sensor is transmitted to the temperature controller for measuring environment temperature, and by the environment temperature；

Temperature controller is believed according to the state parameter and the environment temperature to fan speed-regulating executive device output speed regulating control Number；And

Fan speed-regulating executive device is used for according to the speed regulating control Signal Regulation fan actual speed, to radiate；

Wherein, the state parameter of the heat dissipation object includes: engine temperature, engine speed and engine output torque；

The temperature controller is by engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With under Limit value T_{Send out min}It is compared, and fan target revolving speed is determined according to comparison result, and according to the fan target revolving speed to described Fan speed-regulating executive device exports speed regulating control signal；

The temperature controller determines fan target revolving speed using following methods:

If T_Hair<T_{Send out min}, it is determined that the fan target revolving speed is the minimum speed of fan；

If T_{Send out min}≤T_Hair≤T_{Send out max}, it is determined that the fan target revolving speed is to be turned according to the engine temperature, the engine Fast, the described engine output torque and the environment temperature calculate the first fan target revolving speed obtained；

If T_Hair>T_{Send out max}, it is determined that the fan target revolving speed is the maximum speed of fan；

The temperature controller determines the first fan target revolving speed using following methods:

Engine output is determined according to the engine speed and the engine output torque；

It is determined according to the proportionate relationship between the engine output and engine heat load and engine output Engine heat load；

The heat dissipation system of engine radiator is determined according to the engine heat load, the engine temperature and the environment temperature Number；

According to the heat dissipation system of the coefficient of heat transfer of the engine radiator and the first fan target revolving speed and engine radiator Proportionate relationship between number determines the first fan target revolving speed.

2. cooling control system according to claim 1, which is characterized in that

The fan speed-regulating executive device includes:

Motor drives hydraulic pump operating, and receives the speed regulating control signal from the temperature controller, according to the speed regulation Control the revolving speed of Signal Regulation hydraulic pump；

Hydraulic pump exports silicone oil, and the silicone oil amount exported according to itself rotational speed regulation to silicon oil clutch；

Silicon oil clutch is arranged between engine and fan, according to the silicon fuel-flow control fan actual speed of input.

3. cooling control system according to claim 1, which is characterized in that

The temperature controller, which calculates, obtains the first fan target revolving speed n_{Target 1}Formula include:

P_Output=ω_Hair×M_Output,

Wherein, P_OutputFor engine output, ω_HairFor engine speed, M_OutputFor engine output torque；

Q_Hair=k₁×P_Output,

Wherein, Q_HairFor engine heat load, k₁Proportionality coefficient between engine heat load and engine output；

Wherein, α_HairFor the coefficient of heat transfer of engine radiator, A_HairFor the heat dissipation area of engine radiator, T_RingFor environment temperature； And

n_{Target 1}=k₃×α_Hair,

Wherein, k₃For the proportionality coefficient between the first fan target revolving speed and the coefficient of heat transfer of engine radiator.

4. cooling control system according to claim 1, which is characterized in that

The state parameter of the heat dissipation object includes: engine temperature, engine speed, engine output torque and hydraulic oil temperature Degree；

The temperature controller is by engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With under Limit value T_{Send out min}It is compared, and by hydraulic fluid temperature T_OilRespectively with the upper limit value T of hydraulic system normal working temperature range_{Oily max} With lower limit value T_{Oily min}Be compared, and fan target revolving speed determined according to comparison result, and according to the fan target revolving speed to The fan speed-regulating executive device exports speed regulating control signal.

5. cooling control system according to claim 4, which is characterized in that the temperature controller is determined using following methods Fan target revolving speed:

If T_Hair<T_{Send out min}And T_Oil<T_{Oily min}, it is determined that the fan target revolving speed is the minimum speed of fan；

If T_{Send out min}≤T_Hair<T_{Send out max}And T_Oil<T_{Oily min}Or T_{Send out max}<T_HairAnd T_{Oily min}≤T_Oil≤T_{Oily max}, it is determined that the fan target turns Speed obtains to be calculated according to the engine temperature, the engine speed, the engine output torque and the environment temperature The the first fan target revolving speed obtained；

If T_Hair<T_{Send out min}And T_{Oily min}≤T_Oil<T_{Oily max}Or T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily max}<T_Oil, it is determined that the fan target turns Speed obtains to be calculated according to the hydraulic fluid temperature, the engine speed, the engine output torque and the environment temperature The the second fan target revolving speed obtained；

If T_{Send out min}≤T_Hair≤T_{Send out max}And T_{Oily min}≤T_Oil≤T_{Oily max}, then the first fan target revolving speed and second fan Rotating speed of target determines that the fan target revolving speed is both biggish one；

If T_{Send out max}<T_HairAnd T_{Oily max}<T_Oil, it is determined that the fan target revolving speed is the maximum speed of fan.

6. cooling control system according to claim 5, which is characterized in that the temperature controller is determined using following methods Second fan target revolving speed:

Hydraulic pressure system is determined according to the ratio that the engine output and hydraulic system thermic load account for engine output System thermic load；

Hydraulic system radiator is determined according to the hydraulic system thermic load, the hydraulic system temperature and the environment temperature Coefficient of heat transfer；

According to dissipating for the coefficient of heat transfer of the hydraulic system radiator and the second fan target revolving speed and hydraulic system radiator Proportionate relationship between hot coefficient determines the second fan target revolving speed.

7. cooling control system according to claim 6, which is characterized in that

The temperature controller, which calculates, obtains the second fan target revolving speed n_{Target 2}Formula include:

P_Output=ω_Hair×M_Output,

Q_Oil=k₂×P_Output,

Wherein, Q_OilFor hydraulic system thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；

Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor the heat dissipation area of hydraulic system radiator, T_RingFor environment temperature Degree；And

n_{Target 2}=k₄×α_Oil,

Wherein, k₄For the proportionality coefficient between the second fan target revolving speed and the coefficient of heat transfer of hydraulic system radiator.

8. a kind of excavator characterized by comprising

The cooling control system as described in claim 1 to 7 is any.

9. a kind of cooling control method characterized by comprising

The state parameter and environment temperature of measurement heat dissipation object；

Speed regulating control signal is exported according to the state parameter and the environment temperature；And

According to the speed regulating control Signal Regulation fan actual speed, to radiate；

Wherein, include: according to the step of state parameter and environment temperature output speed regulating control signal

The state parameter of the heat dissipation object includes: engine temperature, engine speed and engine output torque；

By engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}Compared Compared with, and fan target revolving speed is determined according to comparison result, and dress is executed to the fan speed-regulating according to the fan target revolving speed Set output speed regulating control signal；

Fan target revolving speed is determined using following methods:

It is obtained according to the calculating of the engine temperature, the engine speed, the engine output torque and the environment temperature The first fan target revolving speed the step of include:

10. cooling control method according to claim 9, which is characterized in that according to the speed regulating control Signal Regulation fan Actual speed, to be radiated the step of include:

Hydraulic pump operating is driven using motor, and receives the speed regulating control signal, according to the speed regulating control Signal Regulation The revolving speed of hydraulic pump；

Silicone oil, and the silicone oil amount exported according to itself rotational speed regulation are exported to silicon oil clutch using the hydraulic pump；

The silicon oil clutch is arranged between engine and fan, according to the silicon fuel-flow control fan actual speed of input.

11. cooling control method according to claim 9, which is characterized in that

It calculates and obtains the first fan target revolving speed n_{Target 1}Formula include:

P_Output=ω_Hair×M_Output,

Q_Hair=k₁×P_Output,

n_{Target 1}=k₃×α_Hair,

12. cooling control method according to claim 9, which is characterized in that according to the state parameter and the environment temperature Spending the step of exporting speed regulating control signal includes:

By engine temperature T_HairRespectively with the upper limit value T of engine work temperature range_{Send out max}With lower limit value T_{Send out min}Compared Compared with, and by hydraulic fluid temperature T_OilRespectively with the upper limit value T of hydraulic system normal working temperature range_{Oily max}With lower limit value T_{Oily min}Into Row compares, and determines fan target revolving speed according to comparison result, and hold to the fan speed-regulating according to the fan target revolving speed Luggage sets output speed regulating control signal.

13. cooling control method according to claim 12, which is characterized in that determine that fan target turns using following methods Speed:

14. 3 cooling control method according to claim 1, which is characterized in that according to the hydraulic fluid temperature, described start Machine revolving speed, the engine output torque and the environment temperature calculate the step of obtaining the second fan target revolving speed and include:

15. 4 cooling control method according to claim 1, which is characterized in that

It calculates and obtains the second fan target revolving speed n_{Target 2}Formula include:

P_Output=ω_Hair×M_Output,

Q_Oil=k₂×P_Output,

n_{Target 2}=k₄×α_Oil,