KR101034017B1 - The control method of air conditional for vehicle with stop-start system - Google Patents

Abstract

The present invention relates to a method for controlling an air conditioner of a vehicle equipped with a stop-start system, and corresponding to the operation of the engine, the air conditioner, and the stop-start system. If the engine is stopped due to stop or the like while the stop-start system is in operation, a stop-start system that significantly improves fuel economy by controlling the operation of the air conditioning system configured in the vehicle to minimize fuel consumption is carried out. An object of the present invention is to provide a control method of an air conditioner of a vehicle.

In addition, an object of the present invention is to provide a method for controlling an air conditioner of a vehicle equipped with a stop-start system capable of controlling the internal air of the vehicle even when the compressor of the air conditioner is not driven by the stop-start system.

Therefore, by improving the functionality and reliability of the vehicle equipped with the stop-start system, there is an effect of improving the competitiveness of the product.

Automotive, Air Conditioning Units, Stop-Start Systems, Refrigeration Modes, Thermoelectric Devices

Description

The control method of air conditional for vehicle with stop-start system

The present invention relates to a method for controlling an air conditioner of a vehicle equipped with a stop-start system, and more particularly, in accordance with whether the engine, the air conditioner, and the stop-start system are operated. If any one of the engines is stopped by the stop or the like while the stop-start system is in operation, the operation of the air conditioning system of the vehicle is controlled to minimize fuel consumption, thereby significantly improving fuel economy. For example, even when the compressor of the air conditioner is not driven, control of the air inside the vehicle is possible.

A vehicle (hereinafter referred to as a vehicle) is a transport machine driven by a motor, not driven by rails or wires, and its configuration includes an engine, a fuel supply device, a power transmission device, a suspension and steering device, a braking device, There are drainage, air-conditioning, cooling and lubrication equipment. It is mainly used for the transportation of passengers or cargo.

In the vehicle as described above, air conditioning devices such as air conditioners and heaters are installed to provide a comfortable interior environment for drivers and passengers in the summer when the outside air is high.

Looking at the air conditioner briefly, an evaporator constituting a refrigeration cycle for lowering the internal temperature, a cooler, a blower for supplying temperature and humidity controlled air to the interior of the vehicle, a heater core for increasing the internal temperature, the interior of the vehicle A PTC heater for additionally supplying warm air to the air, and at least one door for mixing (including outside air) the air whose temperature and humidity are controlled by the above configuration.

On the other hand, as the problems of environmental pollution and oil price increase due to the exhaust gas of the vehicle becomes serious, a vehicle for improving the fuel efficiency of the vehicle while protecting the environment has been developed.

There is a vehicle to which a stop-start system is applied to stop the engine when the vehicle is stopped.

The stop-start system allows the engine to be improved by stopping the engine when the vehicle is stopped or at low speeds (approximately 6 km / h of clipping without acceleration) and allowing the engine to restart when the vehicle is accelerated. do.

At this time, since the outside temperature is very low in winter (less than minus 10 ℃) heating is required inside the room, the air conditioner forcibly stops the operation of the stop-start system even if the stop-start system is in operation.

In addition, even in the summer when the outside temperature is very high (video 30 ℃ or more), the operation of the stop-start system is forcibly stopped for cooling the interior of the room.

Since the stop-start system as described above can be easily applied to various vehicles such as diesel and gasoline, the stop-start system is applied to various vehicles that are currently developed in various ways.

The present invention relates to a control method of an air conditioner of a vehicle to which the above stop-start system is applied. The present invention relates to an engine, an air conditioner, and a stop-start system. An object of the present invention is to provide a method for controlling an air conditioner of a vehicle equipped with a stop-start system for performing any one of the methods.

In particular, when the engine is stopped due to a stop or the like while the stop-start system is in operation, a stop-start system that significantly improves fuel economy by controlling the operation of the air conditioning system of the vehicle is minimized. An object of the present invention is to provide a method for controlling an air conditioner of a vehicle.

In addition, an object of the present invention is to provide a method for controlling an air conditioner of a vehicle equipped with a stop-start system capable of controlling the internal air of the vehicle even when the compressor of the air conditioner is not driven by the stop-start system.

In order to achieve the above object, the control method of the air conditioner of the vehicle equipped with the stop-start system according to the present invention, (a) determining the operation of the vehicle and the operation of the air conditioner and the stop-start system; (b) performing the cooling mode using the air conditioner when the air conditioning device is operated while the vehicle is driven and the stop-start system is not operated as a result of the determination; (c) performing a cold storage mode in which the temperature of the coolant is lowered when the air conditioner and the stop-start system are operated while the vehicle is driven; And (d) when the vehicle is stopped and the stop-start system is operated, performing a cooling mode using at least one of a coolant and a thermoelectric element in response to the operation of the air conditioning apparatus.

Preferably, step (d) comprises: (d-1) determining whether the air conditioner is operated when the engine is stopped while the stop-start system is operating; (d-2) when the air conditioner is in operation, measuring the cold storage temperature of the coolant and performing at least one of air conditioning control, blowing control, and thermoelectric element operation control corresponding to the measured cold storage temperature; And (d-3) when the air conditioner does not operate, operating the thermoelectric element when the air conditioner is operated.

Step (d-2), (d-2-1) checking the operation of the air conditioner; (d-2-2) measuring the cold storage temperature of the coolant when the air conditioner is operated; (d-2-3) comparing the heat storage determination temperature with the heat storage coolant when the measured cold storage temperature is higher than the cold storage completion temperature; And (d-2-4) as a result of the comparison, when the cold storage temperature is lower than the coolant heat dissipation determination temperature, reducing the air volume of the blower.

The step (d-2-3) further includes the step of performing the air conditioning control by determining the steady state when the measured cool storage temperature is lower than the cool storage completion temperature (d-2-3 ').

In step (d-2-4), the comparison shows that when the cold storage temperature is higher than the coolant heat dissipation determination temperature, the set temperature of the air conditioner is compared with the outside air temperature. The process further includes.

In step (d-2-4), when the storage temperature is higher than the storage temperature of the coolant heat dissipation, the air conditioning system compares the set temperature with the outside temperature. The process further includes.

Step (d-3) further includes the step of circulating the inside by the outside air when the set temperature is high as a result of comparing the set temperature and the outside temperature of the air conditioner.

Step (d-3) further includes the step of operating the thermoelectric element when the set temperature is low as a result of comparing the set temperature and the outside temperature of the air conditioner.

By the above solution, the present invention controls the air conditioner of the vehicle equipped with the stop-start system, the cooling mode and the cooling mode of the air conditioner in response to the operation of the engine, the air conditioner and the stop-start system And maximize the energy efficiency by performing any of the cooling mode, as well as when the engine is stopped by the stop, by controlling the operation of the air conditioning system configured in the vehicle by minimizing the consumption of fuel, can significantly improve the fuel economy have.

In addition, it is possible to control the internal air of the vehicle even when the compressor of the air conditioner is not driven.

Therefore, by improving the functionality and reliability of the vehicle equipped with the stop-start system, there is an effect of improving the competitiveness of the product.

Examples of a method for controlling an air conditioner for a vehicle equipped with a stop-start system according to the present invention can be variously applied. Hereinafter, the most preferred embodiment will be described with reference to the accompanying drawings.

1 is a view illustrating an embodiment of a method for controlling an air conditioner for a vehicle equipped with a stop-start system according to an embodiment of the present invention, in which a function of a stop-start system is changed by a driver or the like in a process of driving a vehicle equipped with a stop-start system; It shows how to control the air conditioner when it is operated.

In more detail, when the driver of the vehicle stops or runs at a low speed according to the driving condition of the road, at least one of the air conditioning device, the cold storage mode, and the air conditioning mode in response to the operation of the air conditioning system and the stop-start system is performed. It relates to a control method for performing one.

When the driver starts the vehicle, the control means for controlling the operation mode of the air conditioning apparatus checks whether the engine operates according to the parking and driving of the vehicle and stops, and determines whether the air conditioning apparatus and the stop-start system are operated (S100). ). Here, the control means is to perform a sensing function and a control function for the essential components of the present invention, can be configured as an electronic control unit (ECU) or a separate control unit according to the needs of those skilled in the art As a matter of course, the present invention is not limited to a specific one.

If the driver drives after the vehicle starts, the driver activates the air conditioner and the stop-start system is not activated.

At this time, the control means confirms that the engine is operated according to the driving of the vehicle, and determines that the stop-start system is not operated while the air conditioner is operated.

Therefore, the control means performs the cooling mode by the function of the air conditioning apparatus (S200), thereby controlling the internal temperature of the vehicle.

For example, the control means checks the end-of-cooling judgment temperature so that the end-to-end refrigeration of the air-conditioning device is not overcooled, and stops the compressor or minimizes the discharge capacity when the temperature of the coolant is lower than the end-of-cooling judgment temperature. do. Therefore, more efficient air conditioning control is possible through the evaporator and the cooler.

As described above, when the driver operates the stop-start system in the course of driving the vehicle, the control means controls the air conditioner so that the room temperature is maintained at the temperature set by the driver and at the same time, the coolant Perform a cold storage mode to cool the storage.

In the driving state as described above, if the operation of the engine is stopped by the stop-start system when the vehicle stops, the compressor of the air conditioning apparatus does not operate. Therefore, the control means checks this and uses the coolant or the thermoelectric element. Performs a cooling mode to control the internal temperature of the.

Here, looking at the configuration of the air conditioner 100 configured in the vehicle according to the present invention with reference to Figure 4, the internal and external air switching door 110, the draw mode switching door 120, for blowing the inside of the vehicle Blower 130, evaporator 140 and cold storage 150 for supplying cold air to the interior of the vehicle, heater core 160 for supplying warm air to the interior of the vehicle, heat energy inside the air conditioning apparatus 100 It is composed of a thermoelectric element 170 for discharging the furnace, PTC heater 180 for additionally supplying warm air to the interior of the vehicle.

The thermoelectric element 170 is for transferring heat energy of one side to the other side by using a semiconductor or the like by a PN junction, the heat absorbing portion 171 for absorbing heat energy in the air, and the heat energy absorbed by the heat absorbing portion 171. The heat generating part 172, the heat absorbing part 171, and the heat generating part 172 which emits the light are composed of a heat radiating part 173 or the like for contacting a larger area in the air.

Therefore, when the heat absorbing unit 171 is inserted into the air conditioning apparatus 100 and the heat generating unit 172 protrudes out of the air conditioning apparatus 100 to operate the thermoelectric element 170, the air conditioning apparatus The internal temperature of 100 can be lowered.

In the following, with reference to Figure 2 with respect to the cooling mode will be described in more detail.

When the engine is stopped as described above, the control means determines whether the air conditioner mounted in the vehicle is operated (S410).

When the air conditioner is in operation, the control means measures the cold storage temperature for the coolant of the air conditioner, and at least one of air conditioning control, blowing control, and thermoelectric element 170 operation control in response to the measured cold storage temperature. Perform (S420), which will be described in more detail below.

If the air conditioner does not operate, when the air conditioner is operated by a driver or the like, the control means operates the thermoelectric element 170 configured in the air conditioner (S430) to control the temperature inside the vehicle.

Looking at the air conditioner control method for a vehicle equipped with a stop-start system according to the present invention as described above, as shown in Figures 3a and 3b.

If the engine is stopped (S502) while the stop-start system is operating (S501), the control means checks whether the air conditioner is operating (S503).

As a result of the check, if the air conditioner is operating, the control means measures the storage temperature of the storage coolant and compares the storage temperature with the storage temperature (for example, 3 ° C. to 4 ° C.) to determine whether the storage is cold. S503).

When the cold storage is completed (S504), that is, when the measured cold storage temperature is lower than the cold storage completion temperature, the control means normally performs the air conditioning control (S508).

If the cold storage is not completed (S504), that is, if the measured cold storage temperature is higher than the cold storage completion temperature, the control means determines the measured cold storage temperature and the coolant heat dissipation determination temperature (for example, 18 ° C. to 20 ° C.). ℃) (S505).

If the storage cooling temperature is lower than the storage coolant heat dissipation determination temperature (S506), that is, when the measured storage cooling temperature is between the storage coolant completion temperature and the storage coolant heat dissipation determination temperature, the control means reduces the air volume of the blower configured in the air conditioner. (S507), the supply amount to the low temperature air supplied to the inside of the vehicle is gradually reduced.

If the cold storage temperature is higher than the coolant heat dissipation determination temperature (S506), the control means compares the set temperature with the outside air temperature (S509).

At this time, if the set temperature is higher than the outside temperature (S510; YES), that is, if the outside temperature is lower than the internal temperature of the vehicle, the control means controls the door (for air circulation) configured in the air conditioning unit to the outside air inside the vehicle. Supply and circulate (S512).

If the set temperature is lower than the outside temperature, that is, if the outside temperature is higher than the inside temperature of the vehicle, the control means operates the thermoelectric element 170 shown in FIGS. 4 and 5, and the door (air) Circulation) to circulate the bet inside the vehicle (S512).

Therefore, when the engine is stopped by the stop or the like while the stop-start system is in operation, the fuel consumption can be greatly improved by controlling the operation of the air conditioning apparatus configured in the vehicle to minimize the consumption of fuel.

On the other hand, when the air conditioner is not operated (S503), when the air conditioner is operated by the driver or the like, the control means compares the set temperature with the outside air temperature (S509).

At this time, if the set temperature is higher than the outside temperature (S510; YES), that is, if the outside temperature is lower than the internal temperature of the vehicle, the control means controls the door (for air circulation) configured in the air conditioning unit to the outside air inside the vehicle. Supply and circulate (S512).

If the set temperature is lower than the outside temperature, that is, if the outside temperature is higher than the inside temperature of the vehicle, the control means operates the thermoelectric element 170 shown in FIGS. 4 and 5, and the door (air) Circulation) to circulate the bet inside the vehicle (S512).

Therefore, the stop-start system can control the internal air of the vehicle even when the compressor of the air conditioner is not driven.

The air conditioner control method for a vehicle equipped with the stop-start system according to the present invention has been described above. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

1 is a flowchart illustrating an embodiment of a method for controlling an air conditioner of a vehicle equipped with a stop-start system according to the present invention.

FIG. 2 is a flowchart illustrating an embodiment of a cooling mode shown in FIG. 1.

Figures 3a and 3b is a flow chart showing in more detail the control method of the cooling mode shown in FIG.

Figure 4 is a block diagram showing an embodiment of an air conditioning apparatus according to the present invention.

5 is a configuration diagram showing the thermoelectric element shown in FIG.

<Explanation of symbols for the main parts of the drawings>

100: air conditioning unit 110: door for switching the inside and outside air

120: door for switching out ejection mode 130: blower

140: evaporator 150: cold storage

160: heater core 170: thermoelectric element

171: heat absorbing portion 172: heat generating portion

173: heat dissipation unit 180: PTC heater

Claims (8)

(a) determining whether the vehicle is driven and the air conditioner and the stop-start system are operated; (b) performing the cooling mode using the air conditioner when the air conditioning device is operated while the vehicle is driven and the stop-start system is not operated as a result of the determination; (c) performing a cold storage mode for lowering the temperature of the coolant when the air conditioner and the stop-start system are operated while the vehicle is driven; And (d) when the vehicle is stopped and the stop-start system is operated, the air-conditioning mode is performed by using at least one of a coolant and a thermoelectric element in response to the operation of the air conditioning apparatus. In step (d), if the air conditioner (d-2) is operating, the storage temperature of the coolant is measured, and the air conditioning control, the blowing control, and the thermoelectric element operation control are performed in response to the measured storage temperature. Performing at least one, Step (d-2), (d-2-1) checking the operation of the air conditioner; (d-2-2) measuring the cold storage temperature of the coolant when the air conditioner is operated; (d-2-3) comparing the heat storage determination temperature with the heat storage coolant when the measured cold storage temperature is higher than the cold storage completion temperature; And (d-2-4) as a result of the comparison, when the cold storage temperature is lower than the coolant heat dissipation determination temperature, controlling the air conditioner of the vehicle equipped with the stop-start system, comprising: reducing the air volume of the blower; Way. The method according to claim 1, Step (d) is, (d-1) determining whether the air conditioner is operated when the engine is stopped while the stop-start system is in operation; And (d-3) A method for controlling an air conditioner of a vehicle equipped with a stop-start system, further comprising operating a thermoelectric element when the air conditioner is operated. delete The method according to claim 1, The process (d-2-3), (d-2-3 ') if the measured refrigeration temperature is lower than the refrigeration completion temperature, determining that the vehicle is in a steady state and performing air conditioning control. HVAC control method. The method according to claim 1, The process (d-2-4), As a result of the comparison, when the cold storage temperature is higher than the coolant heat dissipation determination temperature, comparing the set temperature and the outside temperature of the air conditioner, and if the set temperature is high, further comprising the step of circulating the inside by the outside air Method for controlling air conditioning system of vehicle equipped with stop-start system. The method according to claim 1, The process (d-2-4), As a result of the comparison, when the heat storage temperature is higher than the heat storage determination temperature of the coolant, comparing the set temperature and the outside temperature of the air conditioner, and if the set temperature is low, further comprising the step of operating the thermoelectric element A method for controlling an air conditioner of a vehicle equipped with a start system. The method according to claim 2, Step (d-3) is, Comparing the set temperature and the outside temperature of the air conditioner when the set temperature is high, the air conditioning system control method for a vehicle equipped with a stop-start system, characterized in that further comprising the step of circulating the inside by the outside air. The method according to claim 2, Step (d-3) is, And a step of operating the thermoelectric element when the set temperature is low as a result of comparing the set temperature and the outside temperature of the air conditioner.

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