WO2014192545A1 - 作業車両 - Google Patents
作業車両 Download PDFInfo
- Publication number
- WO2014192545A1 WO2014192545A1 PCT/JP2014/062838 JP2014062838W WO2014192545A1 WO 2014192545 A1 WO2014192545 A1 WO 2014192545A1 JP 2014062838 W JP2014062838 W JP 2014062838W WO 2014192545 A1 WO2014192545 A1 WO 2014192545A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fan
- control
- control map
- outside air
- engine
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00378—Air-conditioning arrangements specially adapted for particular vehicles for tractor or load vehicle cabins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/3211—Control means therefor for increasing the efficiency of a vehicle refrigeration cycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/16—Cabins, platforms, or the like, for drivers
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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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
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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
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3236—Cooling devices information from a variable is obtained
- B60H2001/3238—Cooling devices information from a variable is obtained related to the operation of the compressor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3236—Cooling devices information from a variable is obtained
- B60H2001/3266—Cooling devices information from a variable is obtained related to the operation of the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3269—Cooling devices output of a control signal
- B60H2001/3276—Cooling devices output of a control signal related to a condensing unit
- B60H2001/3277—Cooling devices output of a control signal related to a condensing unit to control the air flow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
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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
-
- 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
Definitions
- the present invention relates to a work vehicle.
- Patent Document 1 discloses a fan connected to an output shaft of an engine via a clutch (fan clutch).
- the fan clutch can adjust the rotation speed of the fan.
- Patent Document 1 provides a threshold for determining whether or not the temperature of an object to be cooled such as engine cooling water is within a predetermined temperature range, for example, regarding the control of the rotation speed of the fan. Therefore, a system for controlling connection / disconnection of the fan clutch is disclosed.
- Patent Document 2 discloses a method for controlling a fan clutch by a control map that estimates a driving state of a vehicle and adjusts the rotation speed of a fan corresponding to the estimated driving state with respect to the control of the fan clutch.
- the work vehicle is provided with a condenser of an air conditioner that is an object to be cooled, and the condenser needs to be cooled by the rotation of the fan.
- the condenser is cooled.
- it does not disclose the point of efficiently adjusting the rotation speed of the fan.
- the present invention has been made to solve the above-described problem, and an object of the present invention is to provide a work vehicle capable of efficiently controlling the rotational speed of a fan based on the operating state of an air conditioner.
- a work vehicle includes a capacitor, a fan, a variable mechanism, a fan control unit, an outside air temperature sensor, and a storage unit.
- the condenser cools the refrigerant used in the air conditioner.
- the fan cools the condenser.
- the variable mechanism can change the rotation speed of the fan.
- the fan control unit controls the variable mechanism.
- the outside temperature sensor detects the outside temperature.
- the storage unit stores a plurality of control maps for setting different fan rotation speeds according to the outside air temperature detected by the outside air temperature sensor.
- the fan control unit controls the rotation speed of the fan by controlling the variable mechanism according to one control map selected based on the operation state of the air conditioner among the plurality of control maps stored in the storage unit.
- one of the plurality of control maps is selected on the basis of the operating state of the air conditioner to control the variable mechanism, so that the rotation speed of the fan can be adjusted efficiently. Is possible.
- the fan rotation speed starts increasing at a lower outside air temperature than the other control maps.
- the rate of change of the rotational speed of the fan with respect to the outside air temperature is larger than in the other control maps.
- the work vehicle further includes an engine that provides a driving force for rotation to the fan.
- the variable mechanism is provided between the engine and the fan, and can change the rotation speed of the fan with respect to the rotation speed of the engine.
- the rotational speed of the fan can be changed with respect to the rotational speed of the engine, it is possible to improve the fuel consumption of the engine by appropriately adjusting the rotational speed of the fan.
- the fan further cools at least one of engine cooling water for cooling the engine and hydraulic oil used in the work machine.
- the storage unit further includes at least one of an engine coolant temperature control map for setting the fan speed according to the engine coolant temperature and a hydraulic oil temperature control map for setting the fan speed according to the hydraulic oil temperature.
- the fan control unit adjusts the rotational speed of the fan by controlling the variable mechanism based on the selected control map and at least one of the engine coolant temperature control map and the hydraulic oil temperature control map.
- the rotational speed of the fan in order to adjust the rotational speed of the fan in consideration of at least one of the engine coolant temperature control map and the hydraulic oil temperature control map, the rotational speed of the fan is appropriately adjusted in consideration of other cooling objects. It is possible.
- the work vehicle further includes a compressor that compresses the refrigerant of the air conditioner.
- the fan control unit detects the state of an on / off drive signal that controls the on / off operation of the compressor.
- the fan control unit controls the variable mechanism according to another control map among the plurality of control maps, and turns ON by the ON / OFF drive signal.
- the variable mechanism is controlled according to one control map of the plurality of control maps.
- variable mechanism when it is detected that the ON period of the ON / OFF drive signal continues for the second period longer than the first period, the variable mechanism is controlled according to the one control map. Since the control map is switched according to the length of the signal ON operation period, it is possible to appropriately adjust the rotational speed of the fan according to the load state of the air conditioner.
- the fan control unit controls the variable mechanism according to one control map of the plurality of control maps
- the fan control unit detects that the off operation by the on / off drive signal continues for the third period.
- the variable mechanism is controlled according to another control map among the plurality of control maps and it is detected that the off operation by the on / off drive signal continues for the fourth period longer than the third period
- the control of the variable mechanism according to another control map of the control maps is stopped.
- the control of the variable mechanism according to another control map is stopped. Since the control according to the control map is stopped according to the length of the OFF operation period of the ON / OFF drive signal, it is possible to appropriately adjust the rotational speed of the fan according to the load state of the air conditioner.
- Fan controller 126 it is a key map which sets the number of rotations of fan 200 using outside temperature control maps A and B. It is a figure explaining the timers P and Q for switching the on / off drive signal of the compressor 38, and the outside temperature control maps A and B. It is a figure explaining the specific example which changes the outside temperature control map according to the on-off drive signal of the compressor. It is a conceptual diagram which controls the fan 200 using a some control map.
- FIG. 1 is a diagram illustrating the appearance of a work vehicle 101 based on the embodiment.
- a hydraulic excavator As shown in FIG. 1, as a work vehicle 101 based on the embodiment, in this example, a hydraulic excavator will be mainly described as an example.
- the work vehicle 101 mainly includes a lower traveling body 1, an upper swing body 3, and a work implement 4.
- the work vehicle main body is composed of a lower traveling body 1 and an upper swing body 3.
- the lower traveling body 1 has a pair of left and right crawler belts.
- the upper turning body 3 is mounted so as to be turnable via a turning mechanism at the top of the lower traveling body 1.
- the work machine 4 is pivotally supported in the upper swing body 3 so as to be operable in the vertical direction, and performs work such as excavation of earth and sand.
- the work machine 4 includes a boom 5, an arm 6, and a bucket 7.
- the base of the boom 5 is movably connected to the upper swing body 3.
- the arm 6 is movably connected to the tip of the boom 5.
- the bucket 7 is movably connected to the tip of the arm 6.
- the upper swing body 3 includes a cab 8 or the like in which the cool air cooled by the air conditioner is blown.
- FIG. 2 is a perspective view showing the configuration of the cooling unit based on the embodiment.
- the cooling unit includes an oil cooler 22 that cools the working oil used for driving the work machine 4 and an engine coolant that cools the engine as cooling objects. It includes a radiator 24 for cooling, an aftercooler 25 for cooling compressed air from a turbocharger (not shown), a fuel cooler 27 for cooling fuel supplied to the engine, and a condenser 29 for cooling the refrigerant of the air conditioner.
- the oil cooler 22 is supplied with hydraulic oil from the oil cooler inlet 11, and the cooled hydraulic oil is discharged from the oil cooler outlet 15.
- the radiator 24 receives supply of engine cooling water from the radiator inlet hose 14, and the cooled engine cooling water is discharged from the radiator outlet hose 19.
- the radiator 24 is also connected to a reserve tank 21 that stores engine cooling water.
- a radiator cap 13 is provided on the upper portion of the radiator 24 so that engine coolant can be replenished.
- the aftercooler 25 receives supply of compressed air from the aftercooler inlet hose 16 and cools the compressed air.
- the aftercooler 25 discharges the compressed air cooled from the aftercooler outlet hose 12. Then, the cooled compressed air is supplied to the engine 10.
- the fuel cooler 27 receives the supply of fuel from the fuel cooler inlet 26, and the cooled fuel is discharged from the fuel cooler outlet 28.
- a fan 200 is provided on the back side of the cooling unit to cool the cooling unit.
- Fan 200 is connected to the output shaft of engine 10 and rotates.
- a fan cover 17 is provided so as to cover the fan 200.
- FIG. 3 is an external view of the fan 200 according to the present embodiment.
- the fan 200 is composed of 11 blades.
- the fan drive unit 210 is connected to the output shaft 202 of the engine 10 and controls the rotation of the fan 200 by a fluid clutch.
- FIG. 4 is a diagram illustrating the configuration of the fan drive unit 210 based on the present embodiment.
- fan drive unit 210 includes a case 240, a clutch unit 230, a spring 221, a solenoid movable element 216, a solenoid coil 214, an adjustment member 220, and a hall element 215.
- the oil pool 241 in the case 240 is filled with silicone oil, and the rotation of the fan 200 is controlled by adjusting the amount of silicone oil to the clutch portion 230.
- the solenoid movable element 216 is connected to the adjustment member 220.
- the solenoid mover 216 contracts the spring 221 and pushes down the adjustment member 220 downward.
- reducing the amount of current supplied to the solenoid coil 214 weakens the force that pushes the solenoid mover 216 downward, and the adjusting member 220 is pushed upward by the repulsive force of the spring 221.
- the amount of silicon oil flowing from the oil pool 241 to the clutch unit 230 is adjusted according to the position of the adjusting member 220. By pushing down the adjustment member 220 downward, the amount of silicon oil flowing into the clutch portion 230 is reduced. On the other hand, the amount of silicon oil flowing into the clutch portion 230 is increased by pushing the adjustment member 220 upward.
- the shear resistance is changed by changing the amount of silicon oil, and the rotational speed of the fan 200 is changed. As the amount of silicon oil flowing into the clutch part 230 increases, the shear resistance increases and the rotational speed of the fan 200 increases. On the other hand, when the amount of silicon oil flowing into the clutch unit 230 is reduced, the shear resistance is reduced and the rotational speed of the fan 200 is reduced.
- Hall element 215 detects the rotation speed of fan 200 and outputs the detection result to a fan controller described later.
- the fan controller controls the amount of current supplied to the solenoid coil 214 so that the rotational speed of the fan 200 detected by the Hall element 215 becomes a desired rotational speed.
- the said fan drive part 210 demonstrated the system which adjusts the rotation speed of the fan 200 with the fluid clutch using silicon oil, it is not restricted to this in particular,
- the fan 200 is used using systems, such as an electromagnetic clutch. The number of rotations may be adjusted.
- FIG. 5 is a simplified diagram showing the configuration of the air conditioner 30 based on the embodiment.
- the air conditioner 30 of the work vehicle 101 includes a condenser 29, a receiver dryer 31, an expansion valve 32, a temperature sensing rod 33, an evaporator 34, a blower fan 35, and an indoor sensor 36. And a circulation path 37 through which the refrigerant circulates, a compressor 38, and an air conditioner controller 39. Further, a case is shown in which an operation panel 40 for instructing the air conditioner controller 39 and a fan 200 for cooling the condenser 29 are provided.
- the compressor 38 compresses the refrigerant by using the driving force of the engine to form a high-temperature, high-pressure gas refrigerant.
- the compressor 38 is controlled by an air conditioner controller 39 and operates according to an on / off drive signal from the air conditioner controller 39.
- the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 38 is output to the condenser 29.
- the gas refrigerant is cooled by the fan 200 to be a liquid refrigerant.
- the receiver dryer 31 removes moisture.
- the expansion valve 32 adjusts the flow rate by a squeezing action based on the result detected by the temperature sensing rod 33 and reduces the liquid refrigerant to a pressure at which it is easy to evaporate.
- the evaporator 34 absorbs heat from the air around the evaporator and cools the air by vaporizing the liquid refrigerant.
- the blower fan 35 blows the air cooled by the evaporator 34 into the cab 8 and lowers the temperature in the cab 8.
- the indoor sensor 36 is provided in the cab 8, detects the temperature of the air in the cab 8, and outputs it to the air conditioner controller 39.
- the operation panel 40 is provided so that the temperature of the air in the cab 8 can be set, and the operator can adjust the temperature of the air in the cab 8 via the operation panel 40. is there.
- the air conditioner controller 39 outputs an on / off drive signal for driving the compressor 38 based on the temperature from the indoor sensor 36 and the temperature set via the operation panel 40. Specifically, when the temperature of the air in the cab 8 detected by the indoor sensor 36 is higher than the temperature set via the operation panel 40, an on / off drive signal is turned on and output to the compressor 38. On the other hand, when the temperature of the air in the cab 8 detected by the indoor sensor 36 is equal to or lower than the temperature set via the operation panel 40, the on / off drive signal is output to the compressor 38 as an off state. By this processing, the inside of the cab 8 can be cooled and maintained at the set temperature.
- the on / off drive signal is also output to the fan controller 126 (FIG. 6) that controls the fan 200.
- the engine 10, the condenser 29, the fan 200, the fan driving unit 210, the fan controller 126, the memory 125, and the compressor 38 are respectively “engine”, “condenser”, “fan”, “variable mechanism”, “fan” of the present invention. It is an example of a “control unit”, “storage unit”, and “compressor”.
- FIG. 6 is a functional block diagram for controlling the fan 200 based on the embodiment.
- the fan control system includes an engine cooling water temperature sensor 121 that detects the temperature of engine cooling water, a hydraulic oil temperature sensor 122 that detects the temperature of hydraulic oil, and an outdoor air temperature sensor that detects the outside air temperature. 123, an air conditioner controller 39, a memory 125, a fan controller 126, an engine controller 127, an engine rotation sensor 129, a fan driving unit 210, a fan 200, and a memory 125.
- the fan controller 126 acquires the engine speed detected by the engine speed sensor 129 via the engine controller 127.
- the fan controller 126 acquires the engine coolant temperature detected by the engine coolant temperature sensor 121.
- the fan controller 126 acquires the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 122.
- the fan controller 126 acquires the temperature of the outside air detected by the outside air temperature sensor 123.
- the fan controller 126 acquires an on / off drive signal from the air conditioner controller 39.
- the fan controller 126 includes a detection unit 126A that detects the state of the air conditioner in accordance with an on / off drive signal from the air conditioner controller 39, and an adjustment unit 126B that controls the fan drive unit 210 to adjust the rotation speed of the fan 200. Including.
- the adjustment unit 126B sets a target rotation speed of the fan 200 based on various information stored in the memory 125, and controls the fan driving unit 210 to rotate the fan 200 at the set target rotation speed.
- the memory 125 stores a plurality of control maps for the fan controller 126 to set to the target rotation speed of the fan 200.
- the outside temperature sensor 123 is an example of the “outside temperature sensor” in the present invention.
- the rotation speed of the fan 200 is controlled to cool the condenser 29 that is the object to be cooled, using the outside air temperature control maps A and B stored in the memory 125 in the control map. The case will be described.
- FIG. 7 is a conceptual diagram for setting the rotation speed of the fan 200 using the outside air temperature control maps A and B in the fan controller 126 based on the embodiment.
- the outside air temperature control map A and the outside air temperature control map B are compared, in the outside air temperature control map A, the rotation speed of the fan 200 increases from the outside air temperature T2 ° C., and the outside air temperature control map B is The rotational speed of the fan 200 increases from the outside air temperature T3 ° C. (T3> T2). Therefore, the outside air temperature control map A is lower than the outside air temperature control map B, and the outside air temperature at which the rotation speed of the fan starts increasing is lower.
- the change rate at which the rotation speed of the fan 200 in the outside air temperature control map A increases is larger than the change rate at which the rotation speed of the fan 200 in the outside air temperature control map B increases.
- the outside air temperature control maps A and B are switched according to the operating state of the air conditioner 30 to control the rotational speed of the fan 200.
- outside air temperature control maps A and B are switched based on the on / off drive signal of the compressor 38 indicating the operating state of the air conditioner.
- FIG. 8 is a diagram for explaining on / off drive signals of the compressor 38 and timers P and Q for switching between the outside air temperature control maps A and B.
- the detection unit 126A of the fan controller 126 detects the state of the air conditioner based on the compressor on / off drive signal and the timers P and Q. And adjustment part 126B adjusts the number of rotations of fan 200 based on a detection result.
- the timer P is a determination timer for validating / invalidating the outside air temperature control map B.
- the timer Q is a determination timer for validating / invalidating the outside air temperature control map A. Note that when both the outside air temperature control maps A and B are valid, the outside air temperature control map A has priority.
- the processing using the determination timer is executed by the detection unit 126A of the fan controller 126.
- the detection unit 126A uses the timer P to determine whether or not the on state is maintained for the period X1 ( ⁇ period X0) after the on / off drive signal of the compressor 38 is turned on.
- the outside air temperature control map B is set to be valid. Thereby, the adjustment unit 126B starts fan control using the outside air temperature control map B.
- the detection unit 126A uses the timer P to determine whether or not the off state is maintained for the period Y1 (> period Y0) after the on / off drive signal of the compressor 38 is turned off.
- the outside air temperature control map B is set to be invalid. Thereby, the adjustment unit 126B stops the fan control using the outside air temperature control map B.
- the detection unit 126A uses the timer Q to determine whether or not the on state is maintained for the period X0 (> period X1) after the on / off drive signal of the compressor 38 is turned on. As a state of the air conditioner, it is determined whether or not a heavy load is applied to the air conditioner. When it is determined that the on state is maintained during the period X0, it is determined that a heavy load is applied to the air conditioner, and the outside air temperature control map A is set to be valid. Thereby, the adjustment unit 126B starts fan control using the outside air temperature control map A. The adjustment unit 126B gives priority to the outside air temperature control map A when both the outside air temperature control maps A and B are valid.
- the detection unit 126A uses the timer Q to determine whether or not the off state is maintained for the period Y0 after the on / off drive signal of the compressor 38 is turned off. If it is determined that the OFF state is maintained during the period Y0, the outside air temperature control map A is set to be invalid. Thereby, the adjustment unit 126B stops the fan control using the outside air temperature control map A. In this case, when the outside air temperature control map B is valid, the adjustment unit 126B switches to fan control using the outside air temperature control map B.
- FIG. 9 is a diagram illustrating a specific example of changing the outside air temperature control map in accordance with the on / off drive signal of the compressor 38.
- the on / off drive signal of the compressor 38 transitions from the off state to the on state.
- the detection unit 126A detects the transition and uses the timer P to determine whether or not the on / off drive signal of the compressor 38 is on during the period X1.
- the detection unit 126A sets the outside air temperature control map B stored in the memory 125 to be valid based on the determination result. Then, the adjustment unit 126B starts fan control using the outside air temperature control map B.
- the detection unit 126A uses the timer Q to determine whether or not the on / off drive signal of the compressor 38 is on during the period X0.
- the detection unit 126A sets the outside air temperature control map A stored in the memory 125 based on the determination result.
- the adjustment unit 126B gives priority to the outside air temperature control map A and performs fan control using the outside air temperature control map A.
- the on / off drive signal of the compressor 38 changes from the on state to the off state.
- the detection unit 126A uses the timer Q to determine whether or not the on / off drive signal of the compressor 38 is continuously off during the period Y0.
- the detection unit 126A sets the outside temperature control map A stored in the memory 125 to invalid based on the determination result.
- the adjustment unit 126B starts fan control using the outside air temperature control map B.
- frost control is performed in which the on / off drive signal of the compressor 38 is repeatedly turned on and off.
- fan control using the outside air temperature control map B is executed.
- the outside temperature control map B is valid from the OFF state continuation period of the ON / OFF drive signal during the frost control in the period P1 of the timer P. Because it is too long.
- the detection unit 126A uses the timer Q to determine whether or not the on / off drive signal of the compressor 38 is on during the period X0.
- the detection unit 126A sets the outside air temperature control map A stored in the memory 125 based on the determination result.
- the adjustment unit 126B gives priority to the outside air temperature control map A and performs fan control using the outside air temperature control map A.
- the on / off drive signal of the compressor 38 changes from the on state to the off state.
- the detection unit 126A uses the timer Q to determine whether or not the on / off drive signal of the compressor 38 is continuously off during the period Y0.
- the detection unit 126A sets the outside temperature control map A stored in the memory 125 to invalid based on the determination result.
- the adjustment unit 126B starts fan control using the outside air temperature control map B.
- the detection unit 126A uses the timer P to determine whether or not the on / off drive signal of the compressor 38 is continuously off during the period Y1.
- the detection unit 126A sets the outside air temperature control map B stored in the memory 125 to invalid based on the determination result.
- the adjustment unit 126B ends the fan control using the outside air temperature control map B.
- the outside air temperature control map A of the plurality of control maps is enabled,
- the outside air temperature control map A is used to control the rotation speed of the fan 200. Therefore, in a situation where a heavy load is applied to the air conditioner, it is possible to increase the cooling rate of the air in the cab 8 by increasing the number of rotations of the fan 200 early to increase the cooling of the condenser 29. .
- the outside air temperature control map B of the plurality of control maps is validated, and the outside air temperature control map B To control the fan speed. Therefore, in a situation where the load applied to the air conditioner is not heavy, it is possible to efficiently control the rotational speed of the fan 200 by selectively setting the rotational speed of the fan to a low rotational speed. In particular, it is possible to improve the fuel consumption by suppressing the rotational speed of the fan 200 driven by the engine 10.
- the fan control using the outside air temperature control maps A and B has been described.
- the fan 200 can also be controlled using a plurality of control maps.
- FIG. 10 is a conceptual diagram for controlling the fan 200 using a plurality of control maps.
- the process is a process in the detection unit 126A and the adjustment unit 126B in the fan controller 126.
- the adjusting unit 126 ⁇ / b> B refers to the engine coolant temperature control map stored in the memory 125 according to the engine coolant temperature detected by the engine coolant temperature sensor 121, and adjusts the fan rotation speed.
- the engine cooling water temperature control map is a control map for setting the rotation speed of the fan 200 according to the temperature of the engine cooling water in order to cool the radiator 24 of the cooling unit that is the object to be cooled.
- the adjusting unit 126B sets the fan rotation speed with reference to the hydraulic oil temperature control map stored in the memory 125 according to the hydraulic oil temperature detected by the hydraulic oil temperature sensor 122.
- the hydraulic oil temperature control map is a control map for setting the rotational speed of the fan 200 according to the temperature of the hydraulic oil in order to cool the oil cooler 22 of the cooling unit that is the object to be cooled.
- the detection unit 126A detects the state of the air conditioner and sets the outside air temperature control map. Then, the adjustment unit 126B sets the fan rotation speed with reference to the outside temperature control map set by the detection unit 126A stored in the memory 125 in accordance with the outside temperature detected by the outside temperature sensor 123.
- the adjustment unit 126B is set with reference to the fan rotation speed set with reference to the engine coolant temperature control map, the fan rotation speed set with reference to the hydraulic oil temperature control map, and the outside air temperature control map. Select the highest number of fan rotations.
- the adjustment unit 126B sets the fan rotation speed with reference to the engine rotation speed control map stored in the memory 125 according to the engine rotation speed detected by the engine rotation sensor 129.
- the engine rotation speed control map is a control map for setting the rotation speed of the fan 200 via the fan drive unit 210 according to the rotation speed of the engine 10.
- the adjusting unit 126B selects the fan rotation speed set with reference to the engine rotation speed control map and the lower fan rotation speed among the highest fan rotation speeds (low rotation selection).
- the fan 200 is connected to the output shaft of the engine 10 via the fan driving unit 210 and is rotated by the driving force of the engine 10. Therefore, the fan speed set according to the engine speed control map is the maximum fan speed that can be rotated by driving the engine. Therefore, when the selected highest fan speed (high speed selection) is larger than the fan speed set according to the engine speed control map, the maximum fan speed set according to the engine speed control map Set to It is possible to rotate the fan 200 at the maximum output fan speed.
- the highest selected fan speed (high speed selection) is equal to or lower than the fan speed set according to the engine speed control map.
- the highest selected fan speed (high speed selection) is selected. Set to It is possible to efficiently rotate the fan 200 without rotating the fan 200 with an excessive number of fan rotations.
- a hydraulic excavator has been described as an example of a work vehicle, but the present invention can also be applied to a work vehicle such as a bulldozer or a wheel loader.
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Abstract
Description
<全体構成>
図1は、実施形態に基づく作業車両101の外観を説明する図である。
図2は、実施形態に基づく冷却ユニットの構成を示す斜視図である。
図3は、本実施形態に基づくファン200の外観図である。
図4を参照して、ファン駆動部210は、ケース240と、クラッチ部230と、バネ221と、ソレノイド可動子216と、ソレノイドコイル214と、調整部材220と、ホール素子215とを含む。
図5は、実施形態に基づく空気調和機30の構成を示す簡略図である。
レシーバドライヤ31は、水分を除去する。
図6は、実施形態に基づくファン200を制御する機能ブロック図である。
本実施形態においては、一例として上記制御マップのうちメモリ125に格納されている外気温度制御マップA,Bを用いて冷却対象物であるコンデンサ29を冷却するためにファン200の回転数を制御する場合について説明する。
なお、外気温度制御マップA,Bがともに有効である場合には、外気温度制御マップAが優先される。
当該処理は、ファンコントローラ126における検出部126Aおよび調整部126Bにおける処理である。
なお、本例においては、作業車両として、油圧ショベルを例に挙げて説明したが、ブルドーザ、ホイールローダ等の作業車両にも適用可能である。
Claims (7)
- 空気調和機で用いられる冷媒を冷却するコンデンサと、
前記コンデンサを冷却するファンと、
前記ファンの回転数を変更可能な可変機構と、
前記可変機構を制御するファン制御部と、
外気温度を検出する外気温度センサと、
前記外気温度センサによって検出された外気温度に従ってそれぞれが異なるファンの回転数に設定するための複数の制御マップを記憶する記憶部とを備え、
前記ファン制御部は、前記記憶部に記憶された前記複数の制御マップのうち前記空気調和機の動作状態に基づいて選択される1つの制御マップに従って前記可変機構を制御して前記ファンの回転数を制御する、作業車両。 - 前記複数の制御マップのうちの一の制御マップにおいては、他の制御マップよりも低い外気温度で前記ファンの回転数が上昇を開始する、請求項1記載の作業車両。
- 前記複数の制御マップのうちの一の制御マップにおいては、他の制御マップよりも前記外気温度に対するファンの回転数の変化率が大きい、請求項1または請求項2記載の作業車両。
- 前記ファンに回転のための駆動力を与えるエンジンをさらに備え、
前記可変機構は、前記エンジンと前記ファンとの間に設けられ、前記エンジンの回転数に対して前記ファンの回転数を変更可能である、請求項1~請求項3のいずれか1項に記載の作業車両。 - 前記ファンは、前記エンジンを冷却するエンジン冷却水および作業機で用いられる作動油の少なくとも一方をさらに冷却し、
前記記憶部は、前記エンジン冷却水の温度に従って前記ファンの回転数を設定するためのエンジン冷却水温度制御マップおよび前記作動油の温度に従って前記ファンの回転数を設定するための作動油温度制御マップの少なくとも一方をさらに格納し、
前記ファン制御部は、前記選択された制御マップと、前記エンジン冷却水温度制御マップおよび前記作動油温度制御マップの少なくとも一方とに基づいて前記可変機構を制御して前記ファンの回転数を制御する、請求項4に記載の作業車両。 - 前記空気調和機の前記冷媒を圧縮するコンプレッサをさらに備え、
前記ファン制御部は、前記コンプレッサのオン/オフ動作を制御するオンオフ駆動信号の状態を検出し、
前記オンオフ駆動信号によるオン動作が第1の期間継続していることを検出した場合に、前記複数の制御マップのうちの前記他の制御マップに従って前記可変機構を制御し、
前記オンオフ駆動信号によるオン動作が前記第1の期間よりも長い第2の期間継続していることを検出した場合に、前記複数の制御マップのうちの前記一の制御マップに従って前記可変機構を制御する、請求項2または3に記載の作業車両。 - 前記ファン制御部は、
前記複数の制御マップのうちの前記一の制御マップに従って前記可変機構を制御している場合に、前記オンオフ駆動信号によるオフ動作が第3の期間継続していることを検出した場合に、前記複数の制御マップのうちの前記他の制御マップに従って前記可変機構を制御し、
前記オンオフ駆動信号によるオフ動作が前記第3の期間よりも長い第4の期間継続していることを検出した場合に、前記複数の制御マップのうちの前記他の制御マップに従う前記可変機構の制御を停止する、請求項6に記載の作業車両。
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CN201480000547.XA CN104114777B (zh) | 2014-05-14 | 2014-05-14 | 作业车辆 |
DE112014000034.5T DE112014000034B4 (de) | 2014-05-14 | 2014-05-14 | Verfahren zur Steuerung eines Arbeitsfahrzeugs und Arbeitsfahrzeug |
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CN104863688A (zh) * | 2015-04-20 | 2015-08-26 | 龙口中宇汽车风扇离合器有限公司 | 无级调速控制策略及控制装置及电磁风扇离合器 |
CN105781706B (zh) * | 2016-03-10 | 2019-07-09 | 优数通(北京)科技有限公司 | 一种汽车发动机冷却风扇数据远程分析的控制方法及装置 |
CN106284474B (zh) * | 2016-09-23 | 2018-05-22 | 广西玉柴重工有限公司 | 一种液压挖掘机静音防爆空调系统 |
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US9662958B2 (en) | 2017-05-30 |
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