US20120240608A1 - Air-conditioning control apparatus - Google Patents
Air-conditioning control apparatus Download PDFInfo
- Publication number
- US20120240608A1 US20120240608A1 US13/425,793 US201213425793A US2012240608A1 US 20120240608 A1 US20120240608 A1 US 20120240608A1 US 201213425793 A US201213425793 A US 201213425793A US 2012240608 A1 US2012240608 A1 US 2012240608A1
- Authority
- US
- United States
- Prior art keywords
- air
- conditioning
- power amount
- cooling
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- 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
-
- 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
- B60H1/00421—Driving arrangements for parts of a vehicle air-conditioning
- B60H1/00428—Driving arrangements for parts of a vehicle air-conditioning electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Definitions
- the contents disclosed below relate to an air-conditioning control apparatus, and more specifically, relate to an air-conditioning control apparatus that performs air-conditioning control in a motor vehicle such as an electric vehicle (EV) or a hybrid electric vehicle (HEV).
- a motor vehicle such as an electric vehicle (EV) or a hybrid electric vehicle (HEV).
- EV electric vehicle
- HEV hybrid electric vehicle
- a limitation on air-conditioning equipment such as an auxiliary heater (PTC) or an electric compressor is required.
- PTC auxiliary heater
- electric compressor a limitation on the air-conditioning equipment
- heating and cooling are both limited to a minimum driving state (minimum electric power value of the electric compressor and the auxiliary heater), regardless of the vehicle traveling state and power generation state (in the case of an HEV vehicle).
- operation of the air-conditioning equipment is uniformly limited regardless of the panel settings set by the driver, and the power required for cooling and heating performance determined according to outside air temperature, etc.
- a drive control amount for the limitation is set to a value obtained by simply limiting a drive control amount in the normal air-conditioning control, and the limitation is performed uniformly with respect to all states having different conditions.
- power for a cooling unit is provided from a battery that supplies power to a driving electric motor, in order to effect cooling.
- An air-conditioning apparatus for a hybrid vehicle calculates the power required for air-conditioning that is required by an air-conditioning unit for adjusting compartment temperature to a preset temperature, and during vehicle traveling, sets a higher target remaining battery charge with an increase of the power required for air-conditioning.
- the driving power allocated for the auxiliary heater can be added to the electric compressor side.
- the electric compressor is limited to a minimum power value in the minimum driving state, even though the driving power allocated for the auxiliary heater can be added to the electric compressor side.
- limitation may be enforced so that all operations of the air-conditioning equipment are suspended.
- the air-conditioning control apparatus includes a defroster mode for increasing defogging properties (defogging performance) and a defroster and foot mode (D/F mode) as selectable air outlet modes.
- defroster mode for increasing defogging properties (defogging performance)
- D/F mode defroster and foot mode
- control of condensation (moisture) contained in the air is executed. That is to say, control is executed so that a cooling unit constituting a cooling cycle system of the air-conditioning apparatus is driven, and a heating unit of the air-conditioning apparatus is driven for raising the temperature of air cooled by the cooling cycle system to a target air outlet temperature.
- the cooling unit and the heating unit need to be driven simultaneously, and power is required for both cooling and heating systems, and hence, the power consumption is substantial.
- the air-conditioning control In the air-conditioning control based on simply determining whether or not to perform the power limitation, detailed determination of the operating conditions of the air-conditioning apparatus or the like is not performed, and air-conditioning control in which the power distribution is changed based on the detailed determination is not performed.
- cruising distance can be extended corresponding to a reduction in the amount of power consumed by the air-conditioning.
- air-conditioning control for maintaining comfort cannot be performed, or conversely, the air-conditioning control may reduce comfort.
- an air-conditioning control apparatus that performs detailed determination of the operating conditions, etc., of the air-conditioning apparatus, and performs efficient air-conditioning control such that power distribution is changed based on the detailed determination, in order to improve the comfort of occupants under a limitation on air-conditioning, thereby balancing ensuring the cruising distance with ensuring the comfort of the occupants.
- An air-conditioning control apparatus disclosed herein is used for a vehicle including an air-conditioning apparatus driven by using power that can be supplied to an on-board battery or power supplied from the battery, in which the air-conditioning apparatus includes at least a cooling unit driven by power when a cooling system operates, and a heating unit driven by power when a heating system operates, in which the air-conditioning control apparatus executes control for limiting power to be supplied to the air-conditioning apparatus at least when a state of charge of the battery is low.
- the air-conditioning control apparatus calculates a usable power amount for air-conditioning; calculates a usage proportion of the cooling unit, and calculates a usable power amount for the cooling unit based on the usable power amount for air-conditioning and the usage proportion of the cooling unit; calculates a usage proportion of the heating unit, and calculates a usable power amount for the heating unit based on the usable power amount for air-conditioning and the usage proportion of the heating unit; calculates a target cooling power amount; sets a difference between the usable power amount for the cooling unit and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as a driving limit value for cooling, to drive the cooling unit, when the target cooling power amount is less than the usable power amount for the cooling unit; sets the power difference of the cooling unit to zero, and designates a sum of the usable power amount for the cooling unit and a power difference of the heating unit as a driving limit value for cooling, to drive the cooling unit, when the target cooling power amount is less than
- FIG. 1 is a functional block diagram illustrating an air-conditioning control apparatus
- FIG. 2 is a schematic diagram illustrating an air-conditioning apparatus and the air-conditioning control apparatus mounted on a vehicle;
- FIG. 3 illustrates a usage proportion of a cooling unit in the case of an automatic air-conditioning system
- FIG. 4 illustrates a usage proportion of a cooling unit in the case of a manual air-conditioning system
- FIG. 5 is a flowchart for calculating a usable power amount for a cooling unit and a usable power amount for a heating unit;
- FIG. 6 is a flowchart for calculating a driving limit value for cooling.
- FIG. 7 is a flowchart for calculating a driving limit value for heating.
- An air-conditioning control apparatus disclosed here performs detailed determination of operating conditions or the like of an air-conditioning apparatus so as to improve the comfort of occupants under a limitation on air-conditioning, and performs efficient air-conditioning control by changing power distribution or the like based on the detailed determination so as to balance ensuring the range with ensuring the comfort of the occupants.
- the air-conditioning control apparatus realizes an object of performing detailed determination of the operating conditions or the like of the air-conditioning apparatus, performing efficient air-conditioning control by changing power distribution or the like based on the detailed determination, and balancing ensuring the range with ensuring the comfort of occupants, by calculating usage proportions of a cooling unit and a heating unit, so that comfort of the occupants is improved under a limitation on air-conditioning.
- a motor vehicle (hereinafter, referred to as a “vehicle”) 1 is an electric vehicle or a hybrid vehicle.
- a windshield 2 and a vehicle interior 3 thereof are shown in FIG. 2 .
- a power train 4 including a drive motor and a transmission for traveling, an air-conditioning apparatus (air-conditioner) 5 that performs air-conditioning of the vehicle interior 3 , and a battery 6 .
- the air-conditioning apparatus 5 performs air-conditioning of the vehicle interior 3 by performing dehumidifying, cooling, or heating based on air temperature and relative humidity in the vehicle interior 3 , and includes a path forming body 8 that forms an air circulation path 7 .
- the path forming body 8 is provided with an inside and outside air switching damper 13 that swings inside an upstream end of the path forming body 8 , and an intake port actuator 14 that actuates the inside and outside air switching damper 13 , so as to switch between an outside air introduction port 10 connected to an outside air introduction duct 9 and an inside air introduction port 12 connected to an inside air introduction duct 11 .
- the path forming body 8 is provided with a first outlet switching damper 19 that swings inside a downstream end of the path forming body 8 and a first mode actuator 20 that actuates the first outlet switching damper 19 , so as to switch between a defroster outlet 16 connected to a defroster duct 15 and a vent outlet 18 connected to a vent duct 17 .
- the path forming body 8 is provided with a second outlet switching damper 23 that swings inside the downstream end of the path forming body 8 and a second mode actuator 24 that actuates the second outlet switching damper 23 , so as to open and close a foot outlet 22 connected to a foot duct 21 .
- the same configuration can be realized by connecting the first mode actuator 20 and the second mode actuator 24 by a link mechanism to form one actuator.
- a blower fan 25 In the path forming body 8 , a blower fan 25 , an evaporator 26 , a heater core 27 , an air mixing damper 28 , and an automatic and manual (AM) actuator 29 are provided.
- the blower fan 25 is provided on a downstream side of the inside and outside air switching damper 13 , and is driven by a fan motor 30 to feed air into the vehicle interior 3 .
- the evaporator 26 is provided on the downstream side of the blower fan 25 , and is used for cooling the vehicle interior 3 .
- An electric compressor 32 constituting a cooling unit 31 for cooling the vehicle interior 3 , is arranged outside the path forming body 8 , and is connected to the evaporator 26 .
- the heater core 27 is provided on the downstream side of the evaporator 26 , and is driven for heating the vehicle interior 3 .
- An auxiliary heater (PTC) 34 constituting a heating unit 33 is arranged near the downstream side of the heater core 27 .
- the air mixing damper 28 is actuated by the automatic and manual (AM) actuator 29 , and swings in the air circulation path 7 so as to adjust a quantity of airflow to the heater core 27 .
- AM automatic and manual
- the cooling unit 31 is driven by power when a cooling system of the air-conditioning apparatus 5 is used.
- the heating unit 33 is driven by power when a heating system of the air-conditioning apparatus 5 is used.
- an air-conditioning control apparatus 35 that controls the air-conditioning apparatus 5 .
- the air-conditioning control apparatus 35 includes a control device for power train 36 that communicates with the battery 6 and controls the power train 4 , a control device for air-conditioning 37 that automatically or manually controls the air-conditioning apparatus 5 , and an air-conditioning control device for a motor vehicle (corresponding to an EV controller or HEV controller) 38 that communicates with these control device for power train 36 and control device for air-conditioning 37 .
- the air-conditioning control apparatus 35 drives the air-conditioning apparatus 5 by using power that can be supplied to the battery 6 or power supplied from the battery 6 , and limits power to be supplied to the air-conditioning apparatus 5 at least when the state of charge of the battery 6 is low.
- the control device for power train 36 includes a usable power amount for air-conditioning calculating section 36 A, and a limitation determining section 36 B that determines whether or not a limitation on power to be supplied to the air-conditioning apparatus 5 is being executed.
- the control device for power train 36 calculates a usable power amount for air-conditioning, which can be allocated to an air-conditioning (cooling and heating) system based on power generation control, power supply, vehicle drive control, power consumption, remaining amount of battery charge, charging state of battery, and the like.
- the control device for air-conditioning 37 includes an automatic air-conditioning control device 39 to be used when the air-conditioning apparatus 5 is used as the automatic air-conditioning system, and a manual air-conditioning control device 40 to be used when the air-conditioning apparatus 5 is used as the manual air-conditioning system.
- the automatic air-conditioning control device 39 includes a panel operating section 39 A operated by a driver, and a target air outlet temperature and air outlet calculating section 39 B that communicates with an outside air temperature detection sensor 41 .
- the manual air-conditioning control device 40 includes an operating panel 40 A operated by the driver.
- the automatic air-conditioning control device 39 calculates a target air outlet temperature and an air outlet port (MODE state) based on panel operation performed by the driver by using the panel operating section 39 A (an operation panel can be separately provided) and the outside air temperature detection sensor 41 (including general sensor items required as the automatic air-conditioning system), etc.
- the manual air-conditioning control device 40 calculates a MODE and an adjustment temperature (panel operation state) according to the MODE and the panel operation for temperature adjustment performed by the driver.
- the air-conditioning control device for motor vehicle 38 includes a power amounts calculating section 38 A that calculates a target cooling power amount and a target heating power amount, a state determining section 38 B that determines a temperature adjusted state and an air outlet (MODE) state, a usage proportions calculating section 38 C that calculates a usage proportion of the cooling unit 31 and a usage proportion of the heating unit 33 , and a usable power amounts calculating section 38 D that calculates a usable power amount of the cooling unit 31 and a usable power amount of the heating unit 33 .
- a power amounts calculating section 38 A that calculates a target cooling power amount and a target heating power amount
- a state determining section 38 B that determines a temperature adjusted state and an air outlet (MODE) state
- a usage proportions calculating section 38 C that calculates a usage proportion of the cooling unit 31 and a usage proportion of the heating unit 33
- a usable power amounts calculating section 38 D that calculates a usable power amount of the cooling unit 31 and
- the air-conditioning control device for motor vehicle 38 communicates with the electric compressor 32 as the cooling unit 31 and the auxiliary heater 34 as the heating unit 33 , and calculates a target cooling power amount (power amount of the electric compressor 32 ) and a target heating power amount (power amount of the auxiliary heater (PTC or the like) 34 ) required by automatic air-conditioning and manual-air conditioning, based on evaporator-thermistor temperature and water temperature, etc. Moreover, in the case of the automatic air-conditioning system, the air-conditioning control device for motor vehicle 38 calculates a usage proportion X of the cooling unit shown in FIG. 3 based on the target air outlet temperature and the MODE (air outlet) state calculated by the automatic air-conditioning control device 39 (X is set between 0% and 100%).
- the usage proportion of the cooling unit 31 is set to be larger for giving priority to antifogging performance.
- the air-conditioning control device for motor vehicle 38 calculates the usage proportion of the cooling unit 31 shown in FIG. 4 based on the MODE and the adjustment temperature set by the driver (X is set between 0% and 100%).
- the air-conditioning control device for motor vehicle 38 calculates the usable power amount for the cooling unit and the usable power amount for the heating unit based on the average usable power amount for air-conditioning calculated via the averaging process, the usage proportion of the cooling unit 31 , and the usage proportion of the heating unit 33 (refer to FIG. 5 ).
- the air-conditioning control device for motor vehicle 38 compares the calculated usable power amount for the cooling unit with the calculated target cooling power amount. In the case in which the target cooling power amount is greater than the usable power amount of the cooling unit, the air-conditioning control device for motor vehicle 38 sets the power difference of the cooling unit that can be supplied to the heating unit 33 to zero (0), and sets the driving limit value for cooling to a sum of the usable power for the cooling unit and the power difference of the heating unit (refer to FIG. 6 ). The air-conditioning control device for motor vehicle 38 drives the cooling unit 31 according to the driving limit value for cooling.
- the air-conditioning control device for motor vehicle 38 supplies the reminder of the usable power amount of the cooling unit (the power difference of the cooling unit) to the heating unit 33 side, and drives the cooling unit 31 by designating the target cooling power amount as the driving limit value for cooling, as in the case of no limitation.
- the air-conditioning control device for motor vehicle 38 fixes a driving limit value for heating in the same manner as for the cooling unit 31 (refer to FIG. 7 ).
- the air-conditioning control apparatus 35 including the air-conditioning control device for motor vehicle 38 , controls the electric compressor 32 and the auxiliary heater (PTC or the like) 34 as the air-conditioning equipment that performs cooling and heating, in association with the operating panel, etc., operated by the driver (only the operating panel is connected in the case of a vehicle with manual air-conditioning control), management of the battery state, and drive control of the vehicle.
- the air-conditioning control apparatus 35 including the air-conditioning control device for motor vehicle 38 , controls the electric compressor 32 and the auxiliary heater (PTC or the like) 34 as the air-conditioning equipment that performs cooling and heating, in association with the operating panel, etc., operated by the driver (only the operating panel is connected in the case of a vehicle with manual air-conditioning control), management of the battery state, and drive control of the vehicle.
- PTC auxiliary heater
- the air-conditioning control apparatus 35 allocates the power amount that can be allocated to the air-conditioning system, which is calculated according to the state of the battery 6 and the vehicle driving state, to cooling (driving power of the electric compressor 32 ) and heating (driving power of the auxiliary heating unit 34 ) according to a driver demand or the automatic air-conditioning state, and performs control so that the required heating and cooling can be realized as much as possible even under a limitation on air-conditioning.
- the air-conditioning control apparatus 35 calculates the usable power amount for the cooling unit 31 based on the usable power amount for air-conditioning and the usage proportion of the cooling unit 31 . Moreover, the air-conditioning control apparatus 35 calculates the usage proportion of the heating unit 33 and calculates the usable power amount for the heating unit 33 based on the usable power amount for air-conditioning and the usage proportion of the heating unit 33 .
- the usage proportion of the cooling unit 31 is set based on the target air outlet temperature, or a physical amount corresponding thereto and the selected air outlet mode.
- the usage proportion of the heating unit 33 is a difference obtained by subtracting the usage proportion of the cooling unit 31 from “1” as a whole, that is, 100%.
- the usage proportion of the cooling unit 31 is set to be larger than the other air outlet mode.
- the air-conditioning control apparatus 35 calculates the target cooling power amount.
- the air-conditioning control apparatus 35 sets the difference between the usable power amount for the cooling unit 31 and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as the driving limit value for cooling, to derive the cooling unit 31 .
- the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero (0), and designates a sum of the usable power amount for the cooling unit 31 and the power difference of the heating unit as the driving limit value for cooling, to drive the cooling unit 31 . Consequently, if the power difference of the heating unit is usable, the driving limit value for cooling can be set by adding the power difference of the heating unit to the usable power amount for the cooling unit 31 .
- the air-conditioning control apparatus 35 calculates the target heating power amount.
- the air-conditioning control apparatus 35 sets the difference between the usable power amount for the heating unit 33 and the target heating power amount as a power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive the heating unit 33 .
- the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero (0), and designates a sum of the usable power amount for the heating unit 33 and the power difference of the cooling unit as the driving limit value for heating, to drive the heating unit 33 . Consequently, if the power difference of the cooling unit is usable, the driving limit value for heating can be set by adding the power difference of the cooling unit to the usable power amount for the heating unit 33 .
- Step A 01 when the program is started (Step A 01 ), the air-conditioning control apparatus 35 determines whether or not a limitation in power to be supplied to the air-conditioning apparatus 5 is in execution (Step A 02 ). When it is NO in Step A 02 , the determination is continued. When it is YES in Step A 02 , the air-conditioning control apparatus 35 calculates the usable power amount for air-conditioning (Step A 03 ), and calculates an averaged usable power amount for air-conditioning by a filtering process (Step A 04 ).
- the air-conditioning control apparatus 35 then calculates a usage proportion X % of the cooling unit 31 (Step A 05 ), and calculates the usage proportion of the heating unit 33 as 100% ⁇ X % (Step A 06 ). Thereafter, the air-conditioning control apparatus 35 calculates the usable power amount for the cooling unit 31 as “averaged usable power amount for air-conditioning ⁇ usage proportion X % of cooling unit 31 ” (Step A 07 ), and calculates the usable power amount for the heating unit 33 as “averaged usable power amount for air-conditioning ⁇ usage proportion of heating unit 33 (100% ⁇ X %)” (Step A 08 ), and then returns the program (Step A 09 ).
- Step B 01 when the program is started (Step B 01 ), the air-conditioning control apparatus 35 checks a state of a limitation in power to be supplied to the air-conditioning apparatus 5 (Step B 02 ). When it is YES in Step B 02 (the limitation is in execution), the air-conditioning control apparatus 35 calculates the target cooling power amount (Step B 03 ), and determines whether the target cooling power amount exceeds the usable power amount for the cooling unit 31 (Step B 04 ).
- Step B 04 the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero (0) (Step B 05 ), and designates “usable power amount for the cooling unit 31 +power difference of the heating unit” as the driving limit value for cooling (Step B 06 ), and a state of a limitation on air-conditioning is in execution (Step B 07 ).
- Step B 08 the air-conditioning control apparatus 35 calculates the power difference of the cooling unit as “usable power amount for the cooling unit 31 ⁇ target cooling power amount” (Step B 08 ).
- Step B 08 After the process in Step B 08 , or when it is NO in step B 02 (the limitation is not in execution), the air-conditioning control apparatus 35 calculates the driving limit value for cooling (Step B 09 ), and a state of a limitation on air-conditioning is not in execution (Step B 10 ). After the process in Step B 07 , or after the process in Step B 10 , the air-conditioning control apparatus 35 returns the program (Step B 11 ).
- Step C 01 when the program is started (Step C 01 ), the air-conditioning control apparatus 35 checks a state of a limitation in power to be supplied to the air-conditioning apparatus 5 (Step C 02 ). When it is YES in Step C 02 (the limitation is in execution), the air-conditioning control apparatus 35 calculates the target heating power amount (Step C 03 ), and determines whether the target heating power amount exceeds the usable power amount for the heating unit 33 (Step C 04 ).
- Step C 04 the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero (0) (Step C 05 ), and designates “usable power amount for the heating unit 33 +power difference of the cooling unit” as the driving limit value for heating (Step C 06 ), and a state of a limitation on air-conditioning is in execution (Step C 07 ).
- Step C 08 the air-conditioning control apparatus 35 calculates the power difference of the heating unit as “usable power amount for the heating unit 33 ⁇ target heating power amount” (Step C 08 ).
- Step C 08 After the process in Step C 08 , or when it is NO in step C 02 (the limitation is not in execution), the air-conditioning control apparatus 35 calculates the driving limit value for heating (Step C 09 ), and a state of a limitation on air-conditioning is not in execution (Step C 10 ). After the process in Step C 07 , or after the process in Step C 10 , the air-conditioning control apparatus 35 returns the program (Step C 11 ).
- the air-conditioning control apparatus 35 calculates a usable power amount for air-conditioning (mean value thereof).
- the air-conditioning control apparatus 35 calculates a usage proportion of the cooling unit 31 , and calculates a usable power amount for the cooling unit 31 based on the usable power amount for air-conditioning and the usage proportion of the cooling unit 31 .
- the air-conditioning control apparatus 35 calculates a usage proportion of the heating unit 33 , and calculates a usable power amount for the heating unit 33 based on the usable power amount for air-conditioning and the usage proportion of the heating unit 33 .
- the air-conditioning control apparatus 35 calculates a target cooling power amount.
- the air-conditioning control apparatus 35 sets a difference between the usable power amount for the cooling unit 31 and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as a deriving limit value for cooling, to drive the cooling unit 31 .
- the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero, and designates a sum of the usable power amount for the cooling unit 31 and a power difference of the heating unit as a driving limit value for cooling, to drive the cooling unit 31 .
- the air-conditioning control apparatus 35 calculates a target heating power amount.
- the air-conditioning control apparatus 35 sets a difference between the usable power amount for the heating unit 33 and the target heating power amount as the power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive the heating unit 33 .
- the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero, and designates a sum of the usable power amount for the heating unit 33 and the power difference of the cooling unit as a driving limit value for heating, to drive the heating unit 33 .
- power distribution to be used for heating and cooling can be set to an appropriate distribution or can be approximated to a distribution similar thereto.
- power (power difference) on one side of the heating unit and the cooling unit, having power to spare with respect to the target power can be transferred to the other side thereof, and a higher capacity of the air-conditioning apparatus 5 can be ensured, thereby enabling to ensure comfort and visibility even when there is power limitation.
- the air-conditioning control apparatus 35 sets the usage proportion of the cooling unit 31 based on a target air outlet temperature, or a physical amount corresponding thereto, and an air outlet mode, and the usage proportion of the heating unit 33 is set to a difference obtained by subtracting the usage proportion of the cooling unit 31 from “1” as a whole.
- the usage proportions of the cooling unit 31 and the heating unit 33 can be set based on the target air outlet temperature or, for example, an adjusted temperature, which is a physical amount corresponding thereto, and the air outlet mode, regardless of whether automatically or manually, and power distribution can be set to an appropriate distribution or approximated to the appropriate distribution.
- the air-conditioning control apparatus 35 sets the usage proportion of the cooling unit 31 to be larger than in other air outlet modes.
- the usage proportion can be set so that antifogging properties can be ensured according to the selected air outlet mode.
- a driver selection switch can be provided to select whether to use the control described in the above embodiment, so that control selection such as for uniformly limiting the operation of the air-conditioning equipment to minimum driving, or stopping the operation of the air-conditioning equipment in a conventional manner, is possible.
- the air-conditioning control apparatus is applicable to various vehicles having a battery, for example, a motor vehicle such as an electric vehicle or a hybrid vehicle.
- a motor vehicle such as an electric vehicle or a hybrid vehicle.
- an internal combustion engine is provided in a power train of the vehicle, and heat of cooling water or the like is supplementally used for the air-conditioning apparatus.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
An air-conditioning control apparatus performs detailed determination of the operating conditions of an air-conditioning apparatus, and performs efficient air-conditioning control such that power distribution is changed based on the detailed determination, in order to improve the comfort of occupants under a limitation on air-conditioning, thereby balancing ensuring the range with ensuring the comfort of the occupants. The air-conditioning control apparatus calculates usable power amounts for a cooling unit and a heating unit, and drives the cooling unit and the heating unit based on drive limit values. It allocates power amounts calculated for the condition of the battery and the vehicle drive, that can be allocated to the air-conditioning equipment, to the cooling unit and the heating unit according to an air-conditioning state that is set automatically or manually, thereby enabling necessary heating and cooling to be used to its full extent even during limitations on air-conditioning.
Description
- The present application claims priority from JP 2011-063999 filed in the Japanese Patent Office on Mar. 23, 2011, the disclosure of which is hereby incorporated herein by reference.
- The contents disclosed below relate to an air-conditioning control apparatus, and more specifically, relate to an air-conditioning control apparatus that performs air-conditioning control in a motor vehicle such as an electric vehicle (EV) or a hybrid electric vehicle (HEV).
- In motor vehicles such as electric vehicles (EV) and hybrid electric vehicles (HEV), in order to prioritize vehicle traveling with low battery charge, a limitation on air-conditioning equipment such as an auxiliary heater (PTC) or an electric compressor is required. When a limitation on the air-conditioning equipment is enforced, heating and cooling are both limited to a minimum driving state (minimum electric power value of the electric compressor and the auxiliary heater), regardless of the vehicle traveling state and power generation state (in the case of an HEV vehicle). In this situation, operation of the air-conditioning equipment is uniformly limited regardless of the panel settings set by the driver, and the power required for cooling and heating performance determined according to outside air temperature, etc.
- That is to say, as a result of limiting air-conditioning based on simply determining whether or not the power limitation is performed, when the air-conditioning is performed, a drive control amount for the limitation is set to a value obtained by simply limiting a drive control amount in the normal air-conditioning control, and the limitation is performed uniformly with respect to all states having different conditions.
- In a hybrid vehicle according to Japanese Laid-open Patent Application Publication No. 1997-76740, power for a cooling unit is provided from a battery that supplies power to a driving electric motor, in order to effect cooling.
- An air-conditioning apparatus for a hybrid vehicle according to Japanese Patent No. 3791234 calculates the power required for air-conditioning that is required by an air-conditioning unit for adjusting compartment temperature to a preset temperature, and during vehicle traveling, sets a higher target remaining battery charge with an increase of the power required for air-conditioning.
- In summer season, when an auxiliary heater serving as a heating unit is not used, and only an electric compressor serving as a cooling unit is required, the driving power allocated for the auxiliary heater can be added to the electric compressor side. However, in the conventional technique, even in such a case, the electric compressor is limited to a minimum power value in the minimum driving state, even though the driving power allocated for the auxiliary heater can be added to the electric compressor side. Moreover, even if battery charge sufficiently remains, or power generation is possible as in the hybrid electric vehicle (HEV), limitation may be enforced so that all operations of the air-conditioning equipment are suspended.
- The air-conditioning control apparatus includes a defroster mode for increasing defogging properties (defogging performance) and a defroster and foot mode (D/F mode) as selectable air outlet modes. In these modes, control of condensation (moisture) contained in the air is executed. That is to say, control is executed so that a cooling unit constituting a cooling cycle system of the air-conditioning apparatus is driven, and a heating unit of the air-conditioning apparatus is driven for raising the temperature of air cooled by the cooling cycle system to a target air outlet temperature. In the defroster mode or the D/F mode, the cooling unit and the heating unit need to be driven simultaneously, and power is required for both cooling and heating systems, and hence, the power consumption is substantial.
- As a result, if the above limitation on air-conditioning is enforced while executing the defroster mode or the D/F mode, substantial functions of the mode may be compromised. If the defroster mode or the D/F mode does not function substantially due to the limitation on air-conditioning, the defogging properties decrease. From a standpoint of ensuring visibility during driving, air-conditioning performance must be ensured to avoid a decrease in defogging properties under specific conditions.
- In the air-conditioning control based on simply determining whether or not to perform the power limitation, detailed determination of the operating conditions of the air-conditioning apparatus or the like is not performed, and air-conditioning control in which the power distribution is changed based on the detailed determination is not performed. In the current limitation on air-conditioning, cruising distance can be extended corresponding to a reduction in the amount of power consumed by the air-conditioning. However, in the case in which sufficient power can be ensured without problems of traveling, air-conditioning control for maintaining comfort cannot be performed, or conversely, the air-conditioning control may reduce comfort.
- In view of the above situation, there is proposed an air-conditioning control apparatus that performs detailed determination of the operating conditions, etc., of the air-conditioning apparatus, and performs efficient air-conditioning control such that power distribution is changed based on the detailed determination, in order to improve the comfort of occupants under a limitation on air-conditioning, thereby balancing ensuring the cruising distance with ensuring the comfort of the occupants.
- An air-conditioning control apparatus disclosed herein is used for a vehicle including an air-conditioning apparatus driven by using power that can be supplied to an on-board battery or power supplied from the battery, in which the air-conditioning apparatus includes at least a cooling unit driven by power when a cooling system operates, and a heating unit driven by power when a heating system operates, in which the air-conditioning control apparatus executes control for limiting power to be supplied to the air-conditioning apparatus at least when a state of charge of the battery is low.
- In this control for limiting power, the air-conditioning control apparatus calculates a usable power amount for air-conditioning; calculates a usage proportion of the cooling unit, and calculates a usable power amount for the cooling unit based on the usable power amount for air-conditioning and the usage proportion of the cooling unit; calculates a usage proportion of the heating unit, and calculates a usable power amount for the heating unit based on the usable power amount for air-conditioning and the usage proportion of the heating unit; calculates a target cooling power amount; sets a difference between the usable power amount for the cooling unit and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as a driving limit value for cooling, to drive the cooling unit, when the target cooling power amount is less than the usable power amount for the cooling unit; sets the power difference of the cooling unit to zero, and designates a sum of the usable power amount for the cooling unit and a power difference of the heating unit as a driving limit value for cooling, to drive the cooling unit, when the target cooling power amount exceeds the usable power amount for the cooling unit; calculates a target heating power amount; sets a difference between the usable power amount for the heating unit and the target heating power amount as the power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive the heating unit, when the target heating power amount is less than the usable power amount for the heating unit; and sets the power difference of the heating unit to zero, and designates a sum of the usable power amount for the heating unit and the power difference of the cooling unit as a driving limit value for heating, to drive the heating unit, when the target heating power amount exceeds the usable power amount for the heating unit.
-
FIG. 1 is a functional block diagram illustrating an air-conditioning control apparatus; -
FIG. 2 is a schematic diagram illustrating an air-conditioning apparatus and the air-conditioning control apparatus mounted on a vehicle; -
FIG. 3 illustrates a usage proportion of a cooling unit in the case of an automatic air-conditioning system; -
FIG. 4 illustrates a usage proportion of a cooling unit in the case of a manual air-conditioning system; -
FIG. 5 is a flowchart for calculating a usable power amount for a cooling unit and a usable power amount for a heating unit; -
FIG. 6 is a flowchart for calculating a driving limit value for cooling; and -
FIG. 7 is a flowchart for calculating a driving limit value for heating. - An air-conditioning control apparatus disclosed here performs detailed determination of operating conditions or the like of an air-conditioning apparatus so as to improve the comfort of occupants under a limitation on air-conditioning, and performs efficient air-conditioning control by changing power distribution or the like based on the detailed determination so as to balance ensuring the range with ensuring the comfort of the occupants. That is to say, the air-conditioning control apparatus according to the present embodiment realizes an object of performing detailed determination of the operating conditions or the like of the air-conditioning apparatus, performing efficient air-conditioning control by changing power distribution or the like based on the detailed determination, and balancing ensuring the range with ensuring the comfort of occupants, by calculating usage proportions of a cooling unit and a heating unit, so that comfort of the occupants is improved under a limitation on air-conditioning.
- In
FIG. 1 andFIG. 2 , a motor vehicle (hereinafter, referred to as a “vehicle”) 1 is an electric vehicle or a hybrid vehicle. Awindshield 2 and avehicle interior 3 thereof are shown inFIG. 2 . - On the
vehicle 1 there is mounted apower train 4 including a drive motor and a transmission for traveling, an air-conditioning apparatus (air-conditioner) 5 that performs air-conditioning of thevehicle interior 3, and abattery 6. - As shown in
FIG. 2 , the air-conditioning apparatus 5 performs air-conditioning of thevehicle interior 3 by performing dehumidifying, cooling, or heating based on air temperature and relative humidity in thevehicle interior 3, and includes apath forming body 8 that forms anair circulation path 7. - The
path forming body 8 is provided with an inside and outsideair switching damper 13 that swings inside an upstream end of thepath forming body 8, and anintake port actuator 14 that actuates the inside and outsideair switching damper 13, so as to switch between an outsideair introduction port 10 connected to an outsideair introduction duct 9 and an insideair introduction port 12 connected to an insideair introduction duct 11. Moreover, thepath forming body 8 is provided with a firstoutlet switching damper 19 that swings inside a downstream end of thepath forming body 8 and afirst mode actuator 20 that actuates the firstoutlet switching damper 19, so as to switch between adefroster outlet 16 connected to adefroster duct 15 and avent outlet 18 connected to avent duct 17. Furthermore, thepath forming body 8 is provided with a secondoutlet switching damper 23 that swings inside the downstream end of thepath forming body 8 and asecond mode actuator 24 that actuates the secondoutlet switching damper 23, so as to open and close afoot outlet 22 connected to afoot duct 21. The same configuration can be realized by connecting thefirst mode actuator 20 and thesecond mode actuator 24 by a link mechanism to form one actuator. - In the
path forming body 8, ablower fan 25, an evaporator 26, aheater core 27, an air mixing damper 28, and an automatic and manual (AM)actuator 29 are provided. Theblower fan 25 is provided on a downstream side of the inside and outsideair switching damper 13, and is driven by afan motor 30 to feed air into thevehicle interior 3. The evaporator 26 is provided on the downstream side of theblower fan 25, and is used for cooling thevehicle interior 3. Anelectric compressor 32 constituting acooling unit 31 for cooling thevehicle interior 3, is arranged outside thepath forming body 8, and is connected to the evaporator 26. Theheater core 27 is provided on the downstream side of the evaporator 26, and is driven for heating thevehicle interior 3. An auxiliary heater (PTC) 34 constituting aheating unit 33 is arranged near the downstream side of theheater core 27. The air mixing damper 28 is actuated by the automatic and manual (AM)actuator 29, and swings in theair circulation path 7 so as to adjust a quantity of airflow to theheater core 27. - The
cooling unit 31 is driven by power when a cooling system of the air-conditioning apparatus 5 is used. Theheating unit 33 is driven by power when a heating system of the air-conditioning apparatus 5 is used. - As shown in
FIG. 1 andFIG. 2 , in thevehicle 1 there is mounted an air-conditioning control apparatus 35 that controls the air-conditioning apparatus 5. - The air-
conditioning control apparatus 35 includes a control device forpower train 36 that communicates with thebattery 6 and controls thepower train 4, a control device for air-conditioning 37 that automatically or manually controls the air-conditioning apparatus 5, and an air-conditioning control device for a motor vehicle (corresponding to an EV controller or HEV controller) 38 that communicates with these control device forpower train 36 and control device for air-conditioning 37. The air-conditioning control apparatus 35 drives the air-conditioning apparatus 5 by using power that can be supplied to thebattery 6 or power supplied from thebattery 6, and limits power to be supplied to the air-conditioning apparatus 5 at least when the state of charge of thebattery 6 is low. - The control device for
power train 36 includes a usable power amount for air-conditioning calculatingsection 36A, and alimitation determining section 36B that determines whether or not a limitation on power to be supplied to the air-conditioning apparatus 5 is being executed. The control device forpower train 36 calculates a usable power amount for air-conditioning, which can be allocated to an air-conditioning (cooling and heating) system based on power generation control, power supply, vehicle drive control, power consumption, remaining amount of battery charge, charging state of battery, and the like. - The control device for air-
conditioning 37 includes an automatic air-conditioning control device 39 to be used when the air-conditioning apparatus 5 is used as the automatic air-conditioning system, and a manual air-conditioning control device 40 to be used when the air-conditioning apparatus 5 is used as the manual air-conditioning system. The automatic air-conditioning control device 39 includes apanel operating section 39A operated by a driver, and a target air outlet temperature and airoutlet calculating section 39B that communicates with an outside airtemperature detection sensor 41. The manual air-conditioning control device 40 includes anoperating panel 40A operated by the driver. The automatic air-conditioning control device 39 calculates a target air outlet temperature and an air outlet port (MODE state) based on panel operation performed by the driver by using thepanel operating section 39A (an operation panel can be separately provided) and the outside air temperature detection sensor 41 (including general sensor items required as the automatic air-conditioning system), etc. The manual air-conditioning control device 40 calculates a MODE and an adjustment temperature (panel operation state) according to the MODE and the panel operation for temperature adjustment performed by the driver. - As shown in
FIG. 1 , the air-conditioning control device formotor vehicle 38 includes a power amounts calculatingsection 38A that calculates a target cooling power amount and a target heating power amount, astate determining section 38B that determines a temperature adjusted state and an air outlet (MODE) state, a usageproportions calculating section 38C that calculates a usage proportion of the coolingunit 31 and a usage proportion of theheating unit 33, and a usable power amounts calculatingsection 38D that calculates a usable power amount of the coolingunit 31 and a usable power amount of theheating unit 33. - The air-conditioning control device for
motor vehicle 38 communicates with theelectric compressor 32 as the coolingunit 31 and theauxiliary heater 34 as theheating unit 33, and calculates a target cooling power amount (power amount of the electric compressor 32) and a target heating power amount (power amount of the auxiliary heater (PTC or the like) 34) required by automatic air-conditioning and manual-air conditioning, based on evaporator-thermistor temperature and water temperature, etc. Moreover, in the case of the automatic air-conditioning system, the air-conditioning control device formotor vehicle 38 calculates a usage proportion X of the cooling unit shown inFIG. 3 based on the target air outlet temperature and the MODE (air outlet) state calculated by the automatic air-conditioning control device 39 (X is set between 0% and 100%). In the defroster (DFR) mode and the defroster and foot (D/F) mode of the various MODEs, the usage proportion of the coolingunit 31 is set to be larger for giving priority to antifogging performance. On the other hand, in the case of the manual air-conditioning system, the air-conditioning control device formotor vehicle 38 calculates the usage proportion of the coolingunit 31 shown inFIG. 4 based on the MODE and the adjustment temperature set by the driver (X is set between 0% and 100%). - The usage proportion of the
heating unit 33 is calculated based on a value obtained by subtracting the calculated usage proportion X % of the coolingunit 31 from 100% (usage proportion of heating unit=100%−X %). - In calculation of the usable power amount for air-conditioning, because the value fluctuates greatly, changes in values can be suppressed by providing an averaging process. Moreover, when no limitation on air-conditioning is in execution, no limitation on the air-conditioning equipment is performed. Hence, the following process may be performed just when a limitation on air-conditioning is in execution.
- The air-conditioning control device for
motor vehicle 38 calculates the usable power amount for the cooling unit and the usable power amount for the heating unit based on the average usable power amount for air-conditioning calculated via the averaging process, the usage proportion of the coolingunit 31, and the usage proportion of the heating unit 33 (refer toFIG. 5 ). - The air-conditioning control device for
motor vehicle 38 compares the calculated usable power amount for the cooling unit with the calculated target cooling power amount. In the case in which the target cooling power amount is greater than the usable power amount of the cooling unit, the air-conditioning control device formotor vehicle 38 sets the power difference of the cooling unit that can be supplied to theheating unit 33 to zero (0), and sets the driving limit value for cooling to a sum of the usable power for the cooling unit and the power difference of the heating unit (refer toFIG. 6 ). The air-conditioning control device formotor vehicle 38 drives the coolingunit 31 according to the driving limit value for cooling. - On the other hand, in the case in which the target cooling power amount is less than or equal to the usable power amount for the cooling unit, the air-conditioning control device for
motor vehicle 38 supplies the reminder of the usable power amount of the cooling unit (the power difference of the cooling unit) to theheating unit 33 side, and drives the coolingunit 31 by designating the target cooling power amount as the driving limit value for cooling, as in the case of no limitation. - The air-conditioning control device for
motor vehicle 38 fixes a driving limit value for heating in the same manner as for the cooling unit 31 (refer toFIG. 7 ). - As shown in
FIG. 1 , the air-conditioning control apparatus 35 according to the present embodiment including the air-conditioning control device formotor vehicle 38, controls theelectric compressor 32 and the auxiliary heater (PTC or the like) 34 as the air-conditioning equipment that performs cooling and heating, in association with the operating panel, etc., operated by the driver (only the operating panel is connected in the case of a vehicle with manual air-conditioning control), management of the battery state, and drive control of the vehicle. The air-conditioning control apparatus 35 allocates the power amount that can be allocated to the air-conditioning system, which is calculated according to the state of thebattery 6 and the vehicle driving state, to cooling (driving power of the electric compressor 32) and heating (driving power of the auxiliary heating unit 34) according to a driver demand or the automatic air-conditioning state, and performs control so that the required heating and cooling can be realized as much as possible even under a limitation on air-conditioning. - To explain specifically, in the case in which the usable power amount for air-conditioning and the usage proportion of the cooling
unit 31 has been calculated, the air-conditioning control apparatus 35 calculates the usable power amount for thecooling unit 31 based on the usable power amount for air-conditioning and the usage proportion of the coolingunit 31. Moreover, the air-conditioning control apparatus 35 calculates the usage proportion of theheating unit 33 and calculates the usable power amount for theheating unit 33 based on the usable power amount for air-conditioning and the usage proportion of theheating unit 33. - The usage proportion of the cooling
unit 31 is set based on the target air outlet temperature, or a physical amount corresponding thereto and the selected air outlet mode. In this case, the usage proportion of theheating unit 33 is a difference obtained by subtracting the usage proportion of the coolingunit 31 from “1” as a whole, that is, 100%. In this calculation, particularly, when the selected air outlet mode includes a defroster, such as the defroster mode or the defroster and foot mode (D/F mode), the usage proportion of the coolingunit 31 is set to be larger than the other air outlet mode. - Moreover, the air-
conditioning control apparatus 35 calculates the target cooling power amount. When the target cooling power amount is equal to or less than the usable power amount for thecooling unit 31, the air-conditioning control apparatus 35 sets the difference between the usable power amount for thecooling unit 31 and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as the driving limit value for cooling, to derive thecooling unit 31. On the other hand, when the target cooling power amount exceeds the usable power amount for thecooling unit 31, the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero (0), and designates a sum of the usable power amount for thecooling unit 31 and the power difference of the heating unit as the driving limit value for cooling, to drive the coolingunit 31. Consequently, if the power difference of the heating unit is usable, the driving limit value for cooling can be set by adding the power difference of the heating unit to the usable power amount for thecooling unit 31. - Moreover, the air-
conditioning control apparatus 35 calculates the target heating power amount. When the target heating power amount is equal to or less than the usable power amount for theheating unit 33, the air-conditioning control apparatus 35 sets the difference between the usable power amount for theheating unit 33 and the target heating power amount as a power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive theheating unit 33. On the other hand, when the target heating power amount exceeds the usable power amount for theheating unit 33, the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero (0), and designates a sum of the usable power amount for theheating unit 33 and the power difference of the cooling unit as the driving limit value for heating, to drive theheating unit 33. Consequently, if the power difference of the cooling unit is usable, the driving limit value for heating can be set by adding the power difference of the cooling unit to the usable power amount for theheating unit 33. - Calculation of the usable power amount for the
cooling unit 31 and the usable power amount for theheating unit 33 will be explained with reference to the flowchart inFIG. 5 . - As shown in
FIG. 5 , when the program is started (Step A01), the air-conditioning control apparatus 35 determines whether or not a limitation in power to be supplied to the air-conditioning apparatus 5 is in execution (Step A02). When it is NO in Step A02, the determination is continued. When it is YES in Step A02, the air-conditioning control apparatus 35 calculates the usable power amount for air-conditioning (Step A03), and calculates an averaged usable power amount for air-conditioning by a filtering process (Step A04). The air-conditioning control apparatus 35 then calculates a usage proportion X % of the cooling unit 31 (Step A05), and calculates the usage proportion of theheating unit 33 as 100%−X % (Step A06). Thereafter, the air-conditioning control apparatus 35 calculates the usable power amount for thecooling unit 31 as “averaged usable power amount for air-conditioning×usage proportion X % of coolingunit 31” (Step A07), and calculates the usable power amount for theheating unit 33 as “averaged usable power amount for air-conditioning×usage proportion of heating unit 33 (100%−X %)” (Step A08), and then returns the program (Step A09). - Next, calculation of the driving limit value for cooling will be explained with reference to the flowchart in
FIG. 6 . - As shown in
FIG. 6 , when the program is started (Step B01), the air-conditioning control apparatus 35 checks a state of a limitation in power to be supplied to the air-conditioning apparatus 5 (Step B02). When it is YES in Step B02 (the limitation is in execution), the air-conditioning control apparatus 35 calculates the target cooling power amount (Step B03), and determines whether the target cooling power amount exceeds the usable power amount for the cooling unit 31 (Step B04). When it is YES in Step B04, the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero (0) (Step B05), and designates “usable power amount for thecooling unit 31+power difference of the heating unit” as the driving limit value for cooling (Step B06), and a state of a limitation on air-conditioning is in execution (Step B07). On the other hand, when it is NO in Step B04, the air-conditioning control apparatus 35 calculates the power difference of the cooling unit as “usable power amount for thecooling unit 31−target cooling power amount” (Step B08). After the process in Step B08, or when it is NO in step B02 (the limitation is not in execution), the air-conditioning control apparatus 35 calculates the driving limit value for cooling (Step B09), and a state of a limitation on air-conditioning is not in execution (Step B10). After the process in Step B07, or after the process in Step B10, the air-conditioning control apparatus 35 returns the program (Step B11). - Next, calculation of the driving limit value for heating will be explained with reference to the flowchart in
FIG. 7 . - As shown in
FIG. 7 , when the program is started (Step C01), the air-conditioning control apparatus 35 checks a state of a limitation in power to be supplied to the air-conditioning apparatus 5 (Step C02). When it is YES in Step C02 (the limitation is in execution), the air-conditioning control apparatus 35 calculates the target heating power amount (Step C03), and determines whether the target heating power amount exceeds the usable power amount for the heating unit 33 (Step C04). When it is YES in Step C04, the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero (0) (Step C05), and designates “usable power amount for theheating unit 33+power difference of the cooling unit” as the driving limit value for heating (Step C06), and a state of a limitation on air-conditioning is in execution (Step C07). On the other hand, when it is NO in Step C04, the air-conditioning control apparatus 35 calculates the power difference of the heating unit as “usable power amount for theheating unit 33−target heating power amount” (Step C08). After the process in Step C08, or when it is NO in step C02 (the limitation is not in execution), the air-conditioning control apparatus 35 calculates the driving limit value for heating (Step C09), and a state of a limitation on air-conditioning is not in execution (Step C10). After the process in Step C07, or after the process in Step C10, the air-conditioning control apparatus 35 returns the program (Step C11). - The embodiment of the air-conditioning control apparatus disclosed above will be explained together with aspects of the invention.
-
Aspect 1 - The air-
conditioning control apparatus 35 calculates a usable power amount for air-conditioning (mean value thereof). - The air-
conditioning control apparatus 35 calculates a usage proportion of the coolingunit 31, and calculates a usable power amount for thecooling unit 31 based on the usable power amount for air-conditioning and the usage proportion of the coolingunit 31. - The air-
conditioning control apparatus 35 calculates a usage proportion of theheating unit 33, and calculates a usable power amount for theheating unit 33 based on the usable power amount for air-conditioning and the usage proportion of theheating unit 33. - The air-
conditioning control apparatus 35 calculates a target cooling power amount. When the target cooling power amount is less than the usable power amount for thecooling unit 31, the air-conditioning control apparatus 35 sets a difference between the usable power amount for thecooling unit 31 and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as a deriving limit value for cooling, to drive the coolingunit 31. On the other hand, when the target cooling power amount exceeds the usable power amount for thecooling unit 31, the air-conditioning control apparatus 35 sets the power difference of the cooling unit to zero, and designates a sum of the usable power amount for thecooling unit 31 and a power difference of the heating unit as a driving limit value for cooling, to drive the coolingunit 31. - The air-
conditioning control apparatus 35 calculates a target heating power amount. When the target heating power amount is less than the usable power amount for theheating unit 33, the air-conditioning control apparatus 35 sets a difference between the usable power amount for theheating unit 33 and the target heating power amount as the power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive theheating unit 33. On the other hand, when the target heating power amount exceeds the usable power amount for theheating unit 33, the air-conditioning control apparatus 35 sets the power difference of the heating unit to zero, and designates a sum of the usable power amount for theheating unit 33 and the power difference of the cooling unit as a driving limit value for heating, to drive theheating unit 33. - Consequently, under power limitations in which power that can be used for the air-
conditioning apparatus 5 is limited, power distribution to be used for heating and cooling can be set to an appropriate distribution or can be approximated to a distribution similar thereto. Moreover, power (power difference) on one side of the heating unit and the cooling unit, having power to spare with respect to the target power can be transferred to the other side thereof, and a higher capacity of the air-conditioning apparatus 5 can be ensured, thereby enabling to ensure comfort and visibility even when there is power limitation. -
Aspect 2 - The air-
conditioning control apparatus 35 sets the usage proportion of the coolingunit 31 based on a target air outlet temperature, or a physical amount corresponding thereto, and an air outlet mode, and the usage proportion of theheating unit 33 is set to a difference obtained by subtracting the usage proportion of the coolingunit 31 from “1” as a whole. - The usage proportions of the cooling
unit 31 and theheating unit 33 can be set based on the target air outlet temperature or, for example, an adjusted temperature, which is a physical amount corresponding thereto, and the air outlet mode, regardless of whether automatically or manually, and power distribution can be set to an appropriate distribution or approximated to the appropriate distribution. -
Aspect 3 - In an air outlet mode including a defroster, the air-
conditioning control apparatus 35 sets the usage proportion of the coolingunit 31 to be larger than in other air outlet modes. - Accordingly, the usage proportion can be set so that antifogging properties can be ensured according to the selected air outlet mode.
- In the embodiment described above, when antifogging performance is given priority and the defroster (DFR) mode is selected, a setting is also possible when the usage proportion of the cooling unit (driving rate of the electric compressor) is set to 100% in a separate map.
- Moreover, a driver selection switch can be provided to select whether to use the control described in the above embodiment, so that control selection such as for uniformly limiting the operation of the air-conditioning equipment to minimum driving, or stopping the operation of the air-conditioning equipment in a conventional manner, is possible.
- The air-conditioning control apparatus according to the present invention is applicable to various vehicles having a battery, for example, a motor vehicle such as an electric vehicle or a hybrid vehicle. In the case of the hybrid vehicle, an internal combustion engine is provided in a power train of the vehicle, and heat of cooling water or the like is supplementally used for the air-conditioning apparatus.
- Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (3)
1. An air-conditioning control apparatus for a vehicle comprising an air-conditioning apparatus driven by using power that can be supplied to an on-board battery or power supplied from the battery, in which
the air-conditioning apparatus includes at least a cooling unit driven by power when a cooling system operates, and a heating unit driven by power when a heating system operates, wherein
the air-conditioning control apparatus executes control for limiting power to be supplied to the air-conditioning apparatus at least when the state of charge of the battery is low,
in this control for restricting power, the air-conditioning control apparatus:
calculates a usable power amount for air-conditioning;
calculates a usage proportion of the cooling unit, and calculates a usable power amount for the cooling unit based on the usable power amount for air-conditioning and the usage proportion of the cooling unit;
calculates a usage proportion of the heating unit, and calculates a usable power amount for the heating unit based on the usable power amount for air-conditioning and the usage proportion of the heating unit;
calculates a target cooling power amount;
sets a difference between the usable power amount for the cooling unit and the target cooling power amount as a power difference of the cooling unit, and designates the target cooling power amount as a driving limit value for cooling, to drive the cooling unit, when the target cooling power amount is less than the usable power amount for the cooling unit;
sets the power difference of the cooling unit to zero, and designates a sum of the usable power amount for the cooling unit and a power difference of the heating unit as the driving limit value for cooling, to drive the cooling unit, when the target cooling power amount exceeds the usable power amount for the cooling unit;
calculates a target heating power amount;
sets a difference between the usable power amount for the heating unit and the target heating power amount as the power difference of the heating unit, and designates the target heating power amount as a driving limit value for heating, to drive the heating unit, when the target heating power amount is less than the usable power amount for the heating unit; and
sets the power difference of the heating unit to zero, and designates a sum of the usable power amount for the heating unit and the power difference of the cooling unit as the driving limit value for heating, to drive the heating unit, when the target heating power amount exceeds the usable power amount for the heating unit.
2. An air-conditioning control apparatus according to claim 1 , wherein the usage proportion of the cooling unit is set based on a target air outlet temperature or a physical amount corresponding thereto and an air outlet mode, and the usage proportion of the heating unit is set to a difference obtained by subtracting the usage proportion of the cooling unit from “1” as a whole.
3. An air-conditioning control apparatus according to claim 2 , wherein, in an air outlet mode including a defroster, the usage proportion of the cooling unit is set to be larger than in other air outlet modes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011063999A JP5590336B2 (en) | 2011-03-23 | 2011-03-23 | Air conditioning controller |
JP2011-063999 | 2011-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120240608A1 true US20120240608A1 (en) | 2012-09-27 |
Family
ID=46831813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/425,793 Abandoned US20120240608A1 (en) | 2011-03-23 | 2012-03-21 | Air-conditioning control apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120240608A1 (en) |
JP (1) | JP5590336B2 (en) |
CN (1) | CN102692065B (en) |
DE (1) | DE102012102438B4 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140297075A1 (en) * | 2013-03-26 | 2014-10-02 | Toyota Jidosha Kabushiki Kaisha | Control system for vehicle |
US20160185185A1 (en) * | 2013-04-26 | 2016-06-30 | Sanden Holdings Corporation | Vehicle air conditioning device |
FR3077531A1 (en) * | 2018-02-08 | 2019-08-09 | Psa Automobiles Sa | METHOD OF PREDICTING A MINIMUM LOAD OF AN ENERGY STORAGE MEMBER ENSURING ACTIVATION OF THERMISTANCE |
CN112959869A (en) * | 2021-03-15 | 2021-06-15 | 北京车和家信息技术有限公司 | Vehicle air conditioner control method, device, equipment, storage medium and vehicle |
US11339998B2 (en) | 2017-06-07 | 2022-05-24 | Carrier Corporation | Transport refrigeration unit control with an energy storage device |
US11821661B2 (en) | 2017-06-07 | 2023-11-21 | Carrier Corporation | Energy control for a transport refrigeration unit with an energy storage device |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6351301B2 (en) * | 2014-02-27 | 2018-07-04 | ダイハツ工業株式会社 | Vehicle control device |
US11260749B2 (en) * | 2016-09-26 | 2022-03-01 | Transportation Ip Holdings, Llc | Cooling control systems |
US10124651B2 (en) * | 2017-01-25 | 2018-11-13 | Ford Global Technologies, Llc | Systems and methods for controlling electrically powered heating devices within electrified vehicles |
JP6458079B2 (en) * | 2017-05-19 | 2019-01-23 | 本田技研工業株式会社 | Air conditioner |
JP7231371B2 (en) * | 2018-10-02 | 2023-03-01 | 株式会社Subaru | VEHICLE POWER CONTROL DEVICE AND POWER CONTROL METHOD |
JP6835141B2 (en) * | 2019-05-31 | 2021-02-24 | ダイキン工業株式会社 | Air conditioning system |
CN114407615B (en) * | 2022-02-23 | 2024-04-12 | 广汽埃安新能源汽车有限公司 | Control method and device for external heater |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030209022A1 (en) * | 2002-05-09 | 2003-11-13 | Hisashi Ieda | Vehicle air-conditioning system |
US7150159B1 (en) * | 2004-09-29 | 2006-12-19 | Scs Frigette | Hybrid auxiliary power unit for truck |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0976740A (en) | 1995-09-08 | 1997-03-25 | Aqueous Res:Kk | Hybrid vehicle |
JP3305974B2 (en) * | 1997-03-05 | 2002-07-24 | トヨタ自動車株式会社 | Air conditioning controller for hybrid vehicles |
JP3791234B2 (en) | 1999-03-17 | 2006-06-28 | 株式会社デンソー | Air conditioner for hybrid vehicles. |
JP3736437B2 (en) | 2000-12-28 | 2006-01-18 | 株式会社デンソー | Air conditioner for hybrid vehicles |
JP2009046115A (en) * | 2007-07-20 | 2009-03-05 | Denso It Laboratory Inc | Vehicular air conditioner and control method for vehicular air conditioner |
JP5125766B2 (en) * | 2008-05-28 | 2013-01-23 | 株式会社デンソー | Air conditioner for vehicles |
JP4784633B2 (en) * | 2008-10-15 | 2011-10-05 | 三菱自動車工業株式会社 | Air conditioner for electric vehicle and control method for air conditioner |
CN101876471B (en) * | 2009-04-30 | 2012-11-21 | 比亚迪股份有限公司 | Control method for air conditioning refrigerating system of automobile |
-
2011
- 2011-03-23 JP JP2011063999A patent/JP5590336B2/en active Active
-
2012
- 2012-03-21 US US13/425,793 patent/US20120240608A1/en not_active Abandoned
- 2012-03-22 DE DE102012102438.3A patent/DE102012102438B4/en active Active
- 2012-03-23 CN CN201210080400.9A patent/CN102692065B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030209022A1 (en) * | 2002-05-09 | 2003-11-13 | Hisashi Ieda | Vehicle air-conditioning system |
US7150159B1 (en) * | 2004-09-29 | 2006-12-19 | Scs Frigette | Hybrid auxiliary power unit for truck |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140297075A1 (en) * | 2013-03-26 | 2014-10-02 | Toyota Jidosha Kabushiki Kaisha | Control system for vehicle |
US9187077B2 (en) * | 2013-03-26 | 2015-11-17 | Toyota Jidosha Kabushiki Kaisha | Control system for vehicle |
US20160185185A1 (en) * | 2013-04-26 | 2016-06-30 | Sanden Holdings Corporation | Vehicle air conditioning device |
US10525794B2 (en) * | 2013-04-26 | 2020-01-07 | Sanden Holdings Corporation | Vehicle air conditioning device |
US11339998B2 (en) | 2017-06-07 | 2022-05-24 | Carrier Corporation | Transport refrigeration unit control with an energy storage device |
US11821661B2 (en) | 2017-06-07 | 2023-11-21 | Carrier Corporation | Energy control for a transport refrigeration unit with an energy storage device |
FR3077531A1 (en) * | 2018-02-08 | 2019-08-09 | Psa Automobiles Sa | METHOD OF PREDICTING A MINIMUM LOAD OF AN ENERGY STORAGE MEMBER ENSURING ACTIVATION OF THERMISTANCE |
CN112959869A (en) * | 2021-03-15 | 2021-06-15 | 北京车和家信息技术有限公司 | Vehicle air conditioner control method, device, equipment, storage medium and vehicle |
Also Published As
Publication number | Publication date |
---|---|
JP2012197062A (en) | 2012-10-18 |
DE102012102438B4 (en) | 2022-03-24 |
CN102692065B (en) | 2014-07-09 |
DE102012102438A1 (en) | 2012-09-27 |
CN102692065A (en) | 2012-09-26 |
JP5590336B2 (en) | 2014-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20120240608A1 (en) | Air-conditioning control apparatus | |
EP2580076B1 (en) | Vehicle air conditioning system | |
US20140144998A1 (en) | Air conditioner for vehicle | |
JP5447486B2 (en) | Air conditioner for vehicles | |
US20130168458A1 (en) | Vehicle air conditioner | |
JP4923859B2 (en) | Vehicle air conditioner and program | |
JP4985726B2 (en) | Hybrid vehicle | |
US20130139532A1 (en) | Air conditioner for vehicle | |
JP2013095347A (en) | Air conditioner for vehicle | |
US9783022B2 (en) | Vehicle air-conditioning system and vehicle air-conditioning method | |
JP5516544B2 (en) | Air conditioner for vehicles | |
JP5928225B2 (en) | Air conditioner for vehicles | |
JP5472024B2 (en) | Air conditioner for vehicles | |
CN108883709A (en) | The high-tension apparatus cooling system of electric vehicle | |
JP2016147544A (en) | Vehicular air conditioner | |
CN114193998A (en) | Vehicle control device | |
JP5556783B2 (en) | Air conditioner for vehicles | |
JP2017056885A (en) | Vehicular air conditioner | |
JP6630615B2 (en) | Vehicle air conditioner | |
JP5556770B2 (en) | Air conditioner for vehicles | |
JP2021195036A (en) | Vehicle control device | |
WO2012157049A1 (en) | Air conditioner control device | |
JP2013049311A (en) | Vehicular air-conditioning system | |
JP5472029B2 (en) | Air conditioner for vehicles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SUZUKI MOTOR CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ITO, ISAMU;HASHIGAYA, HIDEKI;FUTSUHARA, YUKI;AND OTHERS;REEL/FRAME:027925/0858 Effective date: 20120313 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |