CN112228204A - Self-adaptive independent cooling method and system for material grabbing machine and excavator - Google Patents
Self-adaptive independent cooling method and system for material grabbing machine and excavator Download PDFInfo
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- CN112228204A CN112228204A CN202011184685.1A CN202011184685A CN112228204A CN 112228204 A CN112228204 A CN 112228204A CN 202011184685 A CN202011184685 A CN 202011184685A CN 112228204 A CN112228204 A CN 112228204A
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- intercooler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/13—Ambient temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/30—Engine incoming fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/40—Oil temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/50—Temperature using two or more temperature sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2037/00—Controlling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/02—Intercooler
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention relates to the technical field of cooling control, and provides a self-adaptive independent cooling method for a material grabbing machine and an excavator, which comprises the following steps: 1) determining fan rotating speed requirements corresponding to various temperatures according to the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature; 2) comparing the fan speed requirements to determine a maximum fan speed requirement; 3) controlling the fan speed according to the maximum fan rotation requirement; the cooling system comprises a controller, a plurality of temperature sensors connected with the controller, a control valve group connected with the controller, a hydraulic motor connected with the control valve group, and a fan connected with the hydraulic motor. The invention fully and comprehensively considers the requirements of the rear air inlet temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of the intercooler on the rotating speed of the fan, not only reduces the power consumption of the fan, but also improves the cooling efficiency of the cooling system, and has the function of reverse rotation and dust removal of the fan.
Description
Technical Field
The invention relates to the technical field of cooling control, in particular to a self-adaptive independent cooling method and system for a material grabbing machine and an excavator.
Background
In order to normally operate the vehicle, the engine needs to be cooled, and a water cooling method is generally adopted. The water cooling method needs to arrange a radiator which is connected with the engine through a circulating pipeline, water is filled in the circulating pipeline during working, and heat is conducted by using the water. In order to ensure the heat dissipation effect, a fan is required to blow air to the surface of the heat sink.
The prior patent CN104863685A entitled "method and system for controlling electric fan for vehicle" includes the following steps: 1. determining the air volume requirement of the engine according to the water temperature of the engine, the current vehicle speed and the ambient temperature; 2. acquiring one or more auxiliary air volume demands, wherein the auxiliary air volume demands comprise gearbox oil temperature signal air volume demands, thermal energy management air volume demands or accessory air volume demands; 3. determining the maximum fan air quantity demand according to the power generation air quantity demand and the auxiliary air quantity demand; 4. and controlling the rotating speed of the fan according to the maximum fan air volume requirement. The invention takes the vehicle speed, the temperature of the engine coolant and the ambient temperature as the main factors for controlling the fan, and combines the oil temperature of the gearbox, the thermal energy management or other accessories to accurately control the rotating speed of the electric fan, so that the fan is in a low-speed running state as far as possible, the water temperature of the engine is stable, the engine is ensured to run at the optimal working temperature, and the functions of saving oil and reducing emission are achieved. However, the invention is directed to vehicles for roads, namely cars and passenger cars, which mainly change the speed of the vehicles during use, so that the heat quantity of the water radiator needs to be different, and the duty ratio of the fan needs to be adjusted. In the working process of the engineering machinery, the speed of the engineering machinery is relatively stable, so that the relation between the control input of the fan and the rotating speed of the working engine is not large, meanwhile, the radiator of the road vehicle is simple in form and single-row, the electronic fan can be used for radiating heat, the engineering machinery adopts hydraulic fan heat and water radiator integrated heat radiation, the electronic fan is not suitable for the working conditions, the limitation requirement of the engine on air-to-air intercooling needs to be fully considered, and therefore, the method for accurately controlling the rotating speed of the fan according to the working environment of the engineering machinery becomes the key point of research of people in the field.
Disclosure of Invention
The invention aims to provide a material grabbing machine, an excavator self-adaptive independent cooling method and an excavator self-adaptive independent cooling system, which are used for solving the problem of the prior art.
The embodiment of the invention is realized by the following technical scheme:
a self-adaptive independent cooling method for a material grabbing machine and an excavator comprises the following steps:
1) determining fan rotating speed requirements corresponding to various temperatures according to the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature;
2) comparing the fan speed requirements to determine a maximum fan speed requirement;
3) and controlling the fan speed according to the maximum fan speed requirement.
Further, the process of implementing step 1) is:
1.1) establishing a mapping relation between the rear intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of an intercooler and the rotating speed requirement of a fan;
1.2) acquiring real-time data of the rear intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of an intercooler;
and 1.3) obtaining corresponding fan rotating speed requirements in real time states of the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature through data comparison.
Further, the process of implementing step 2) is: and (3) comparing the corresponding fan rotating speed under the real-time state of each parameter in the step 1) to be evaluated, and outputting the maximum value after comparison.
Further, the process of implementing step 3) is:
3.1) establishing a mapping relation among oil pressure, current and fan rotating speed;
3.2) after the maximum fan rotating speed requirement is determined, outputting a corresponding current signal according to the mapping relation in the step 3.1);
3.3) after receiving the current signal, the proportional current valve connected with the hydraulic motor for controlling the rotating speed of the fan correspondingly opens the corresponding opening degree, so that the oil pressure of the hydraulic motor reaches the oil pressure value of the mapping relation in the step 3.1), and the rotating speed control of the fan is realized.
A cooling system of the self-adaptive independent cooling method of the material grabbing machine and the excavator comprises the following steps:
the controller is prestored with mapping relations between the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature and the fan rotating speed requirement and mapping relations between the oil pressure, the current and the fan rotating speed;
the temperature sensors are connected with the controller and are respectively used for monitoring the rear intake air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature;
the control valve group is connected with the controller, receives the current signal from the controller and enables the control valve group to be opened to a corresponding degree according to the current signal;
the hydraulic motor is connected with the control valve group;
and the fan is connected with the hydraulic motor.
Further, the cooling system of the self-adaptive independent cooling method of the material grabbing machine and the excavator further comprises a rotating speed sensor, wherein the rotating speed sensor is used for monitoring the rotating speed of the hydraulic motor and feeding the rotating speed back to the controller.
Further, the cooling system of the self-adaptive independent cooling method of the material grabbing machine and the excavator further comprises a forced cooling function button which is used for quickly starting the fan in an emergency.
Furthermore, the cooling system of the self-adaptive independent cooling method of the material grabbing machine and the excavator further comprises a fan back blowing function button which is used for starting the fan to back blow and remove dust.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
the invention takes the actual working condition of the engineering machinery as a starting point, fully and comprehensively considers the requirements of the air inlet temperature, the cooling water temperature, the hydraulic oil temperature and the environment temperature after the intercooler on the rotating speed of the fan, and determines the maximum rotating speed requirement of the fan, thereby controlling the rotating speed of the fan, enabling the fan to run at the lowest speed, reducing the power consumption of the fan and improving the cooling efficiency of a cooling system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an adaptive independent cooling system of a material grabbing machine and an excavator provided in embodiment 1 of the present invention;
fig. 2 is a graph of a map between oil pressure, current, and fan speed.
Icon: 1-gear pump, 2-diesel engine, 3-integrated cooler, 4-hydraulic motor, 5-control valve group, 6-fan, 7-temperature sensor, 8-diesel engine ECM, 9-controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 2, the present embodiment provides a self-adaptive independent cooling method for a material grabbing machine and an excavator, including the following steps:
1) determining fan rotating speed requirements corresponding to various temperatures according to the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature;
specifically, the method comprises the following steps:
firstly, establishing a mapping relation between the rear intake air temperature of an intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature and the fan rotating speed requirement, wherein the mapping relation is a parameter data table established by an engine manufacturer according to national standards, and the parameter data table comprises the fan rotating speed corresponding to the corresponding temperature value;
then, by means of the prior art, such as monitoring of a temperature sensor, real-time data of the intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature behind the intercooler are obtained;
and finally, comparing the obtained data with data in the parameter data table to obtain fan rotating speed requirements corresponding to the rear intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of the intercooler under the current working condition.
2) Comparing the corresponding fan rotating speed required to be evaluated under the real-time state of each parameter in the step 1), and outputting the maximum value after comparison;
3) controlling the fan speed according to the maximum fan rotation requirement;
specifically, the method comprises the following steps:
3.1) establishing a mapping relation among oil pressure, current and fan rotating speed, as shown in FIG. 2;
3.2) after the maximum fan rotating speed requirement is determined, according to the mapping relation in the step 3.1), finding a rotating speed value corresponding to the left side ordinate according to the determined maximum fan rotating speed requirement, finding a current value corresponding to the curve according to the rotating speed value, and then outputting a corresponding current signal;
3.3) inputting the medium current signal of the step 3.2) into the control valve group to correspondingly open the corresponding opening degree of the control valve group, so that the oil pressure of the hydraulic motor reaches the oil pressure value of the mapping relation in the step 3.1), and the rotating speed control of the fan is realized.
Compared with the traditional method for controlling the rotating speed of the fan in the step 3), the traditional method is as follows: the engine directly drives the fan through the belt pulley, and the ratio of the rotating speed of the fan to the rotating speed of the engine is 0.87: the method comprises the steps that 1, the rotating speed of a fan is determined by the rotating speed of an engine, the rotating speed requirements of the intake temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of a intercooler on the fan are fully and comprehensively considered, after the maximum rotating speed requirement of the fan is determined, the corresponding current is obtained by determining the maximum rotating speed requirement of the fan through establishing a mapping relation among the rotating speed, the current and the pressure, the opening and closing degree of a control valve group is determined by the current, the oil pressure entering a hydraulic motor is guaranteed to reach the corresponding pressure, and therefore the rotating speed of the fan is accurately controlled.
After tests, the cooling method can obviously reduce the rotating speed of the fan, the power consumption of the fan and the noise, and meanwhile, the specific reference is made to the table 1,
TABLE 1
As seen from Table 1, 1) the product has the highest performance price ratio when working at about 8 grades; 2) according to the annual average environmental temperature (Guangzhou) of 23 ℃, the average load rate is about 37 percent, the temperature is equivalent to the test ring temperature, and the conserved oil saving is about 0.1-0.3L/H; the annual work is 2000H, and the annual oil saving is about: 400-600L/year.
Adaptive cooling control (outside summer) is used from table 2, the noise outside the machine is 103 Db, and the noise is reduced by 7 Db; the cab was 75.5Db, which is a 1Db reduction.
Referring to fig. 1, the present embodiment further provides a cooling system based on the above material grabbing machine and excavator self-adaptive independent cooling method, including a controller 9, a plurality of temperature sensors 7, a control valve bank 5, a hydraulic motor 4 and a fan 6, where the plurality of temperature sensors 7 are connected to an input end of the controller 9, an output end of the controller 9 is connected to the control valve bank 5, the diesel engine 2 is connected to the gear pump 1 through an oil pipe, the gear pump 1 passes through the oil pipe hydraulic motor 4, the hydraulic motor 4 flows back to a hydraulic oil tank of the diesel engine through an oil return pipe, the hydraulic motor 4 is used for controlling the rotation of the fan 6, the fan 6 cools the integrated cooler 3, the control valve bank 5 is used for controlling the oil pressure entering the hydraulic motor 4, and the controller 9, in which mapping relationships between the intake air temperature after the intercooler, the cooling water temperature, the temperature of the hydraulic oil and the ambient temperature and, The mapping between current and fan speed.
Specifically, in the working process, the plurality of temperature sensors 7 are arranged to monitor the rear intake air temperature (obtained from the diesel engine ECM8), the cooling water temperature, the hydraulic oil temperature and the ambient temperature of the intercooler respectively, and the monitoring data are fed back to the controller 9 in real time; next, the controller 9 compares the parameter database according to a pre-stored mapping relationship between the temperature and the rotating speed to obtain a maximum rotating speed requirement, then obtains a corresponding current by taking the maximum rotating speed requirement as a reference through the mapping relationship between the oil pressure, the current and the rotating speed of the fan, and then outputs a current signal to the control valve group 5 through the controller 9; finally, after the control valve group 5 obtains the current signal, the valve core opens the corresponding opening degree, so that the hydraulic oil enters the hydraulic motor 4, the oil pressure of the hydraulic motor 4 reaches the corresponding pressure, and the control of the rotating speed of the fan 6 is also completed. Meanwhile, in order to determine whether the rotating speed of the fan reaches the expectation, the system is also provided with a rotating speed sensor, and the rotating speed is fed back to the controller in real time through the rotating speed sensor so as to ensure that the controller can master the rotating speed of the fan in real time.
In addition, the system also comprises a forced cooling function button and a fan back blowing function button, wherein the forced cooling function button is used for rapidly starting the fan in an emergency, and the fan back blowing function button is used for starting the fan to perform back blowing and dust removal.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A self-adaptive independent cooling method for a material grabbing machine and an excavator is characterized by comprising the following steps:
1) determining fan rotating speed requirements corresponding to various temperatures according to the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature;
2) comparing the fan speed requirements to determine a maximum fan speed requirement;
3) and controlling the fan speed according to the maximum fan speed requirement.
2. The adaptive independent cooling method for the material grabbing machine and the excavator according to claim 1, characterized in that: the process for realizing the step 1) is as follows:
1.1) establishing a mapping relation between the rear intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of an intercooler and the rotating speed requirement of a fan;
1.2) acquiring real-time data of the rear intake air temperature, the cooling water temperature, the hydraulic oil temperature and the ambient temperature of an intercooler;
and 1.3) obtaining corresponding fan rotating speed requirements in real time states of the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature through data comparison.
3. The adaptive independent cooling method for the material grabbing machine and the excavator according to claim 1, characterized in that: the process for realizing the step 2) is as follows: and (3) comparing the corresponding fan rotating speed under the real-time state of each parameter in the step 1) to be evaluated, and outputting the maximum value after comparison.
4. The adaptive independent cooling method for the material grabbing machine and the excavator according to claim 1, characterized in that: the process for realizing the step 3) is as follows:
3.1) establishing a mapping relation among oil pressure, current and fan rotating speed;
3.2) after the maximum fan rotating speed requirement is determined, outputting a corresponding current signal according to the mapping relation in the step 3.1);
3.3) after receiving the current signal, the proportional current valve connected with the hydraulic motor for controlling the rotating speed of the fan correspondingly opens the corresponding opening degree, so that the oil pressure of the hydraulic motor reaches the oil pressure value of the mapping relation in the step 3.1), and the rotating speed control of the fan is realized.
5. A cooling system based on the adaptive independent cooling method of the material grabbing machine and the excavator in claim 1 is characterized by comprising the following steps:
the controller is prestored with mapping relations between the rear inlet air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature and the fan rotating speed requirement and mapping relations between the oil pressure, the current and the fan rotating speed;
the temperature sensors are connected with the controller and are respectively used for monitoring the rear intake air temperature of the intercooler, the cooling water temperature, the hydraulic oil temperature and the ambient temperature;
the control valve group is connected with the controller, receives the current signal from the controller and enables the control valve group to be opened to a corresponding degree according to the current signal;
the hydraulic motor is connected with the control valve group;
and the fan is connected with the hydraulic motor.
6. The cooling system of the adaptive independent cooling method of the material grabbing machine and the excavator according to claim 5, is characterized in that: the hydraulic control system also comprises a rotating speed sensor which is used for monitoring the rotating speed of the hydraulic motor and feeding back the rotating speed to the controller.
7. The cooling system of the adaptive independent cooling method of the material grabbing machine and the excavator according to claim 5, is characterized in that: a forced cooling function button is also included for rapid activation of the fan in an emergency.
8. The cooling system of the adaptive independent cooling method of the material grabbing machine and the excavator according to claim 5, is characterized in that: the dust remover also comprises a fan back-blowing function button which is used for starting the fan to back-blow and remove dust.
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| CN202011184685.1A CN112228204A (en) | 2020-10-29 | 2020-10-29 | Self-adaptive independent cooling method and system for material grabbing machine and excavator |
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| CN202011184685.1A CN112228204A (en) | 2020-10-29 | 2020-10-29 | Self-adaptive independent cooling method and system for material grabbing machine and excavator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0949427A (en) * | 1995-08-09 | 1997-02-18 | Shin Caterpillar Mitsubishi Ltd | Cooling control device for construction machine |
| KR20060110554A (en) * | 2005-04-20 | 2006-10-25 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | A method and apparatus for cooling fan rpm control for heavy equipment |
| CN1891995A (en) * | 2005-07-06 | 2007-01-10 | 神钢建设机械株式会社 | Controlling system for cooling fan |
| CN103216304A (en) * | 2013-04-26 | 2013-07-24 | 厦门大学 | Engineering machine cooling fan controller and control method thereof |
| CN105518270A (en) * | 2014-03-06 | 2016-04-20 | 日立建机株式会社 | Control device for construction machine cooling fan |
-
2020
- 2020-10-29 CN CN202011184685.1A patent/CN112228204A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0949427A (en) * | 1995-08-09 | 1997-02-18 | Shin Caterpillar Mitsubishi Ltd | Cooling control device for construction machine |
| KR20060110554A (en) * | 2005-04-20 | 2006-10-25 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | A method and apparatus for cooling fan rpm control for heavy equipment |
| CN1891995A (en) * | 2005-07-06 | 2007-01-10 | 神钢建设机械株式会社 | Controlling system for cooling fan |
| CN103216304A (en) * | 2013-04-26 | 2013-07-24 | 厦门大学 | Engineering machine cooling fan controller and control method thereof |
| CN105518270A (en) * | 2014-03-06 | 2016-04-20 | 日立建机株式会社 | Control device for construction machine cooling fan |
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