KR101577293B1 - The control method of air conditioner for hybrid engine vehicle - Google Patents

Abstract

The present invention relates to an engine 100 and an electric motor 300 that generate a driving force, an air conditioner 400 connected to the engine 100 and operable by driving the engine 100, An engine controller 200 and an air conditioner controller 520 for controlling the air conditioner 400 and an internal and external door 410 and a blower 420 installed in the air conditioner 400, (A) an indoor / outdoor environmental condition of a vehicle in an idle state, (b) a step of determining an indoor / outdoor environmental condition of the vehicle in the idle state, (C) determining whether the air conditioning condition is satisfied according to the air conditioning mode to determine whether or not the idle stop is entered; (d) determining whether the air conditioning condition is satisfied according to the determination in the step (c) A step of prohibiting entry of an idle stop or issuing an enable signal, (E) it includes a step in which the operation of the engine controlled by the signal at the step (d). Accordingly, it is possible to prevent entry into the idle stop against the will of the driver, and the comfort of the vehicle occupant is maintained through the air conditioning control according to the indoor and outdoor environment conditions even in the idle state, It is possible to prevent a problem that needs to be released beforehand.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid vehicle control method,

The present invention relates to a method of controlling air conditioning of a hybrid vehicle, and more particularly, to a method of controlling an air-conditioning control of a hybrid vehicle that prevents the engine from being turned off against the will of the driver in an idling state of the vehicle.

Interest in Hybrid Vehicle (HEV) has been increasing due to regulations on automobile environment and improvement of fuel efficiency in each country. Toyota, for example, is seeing a steady increase in sales in the North American market, and automakers around the world are also struggling to develop hybrid vehicles.

Hybrid vehicles can be broadly divided into soft type and hard type. Soft type is to improve the fuel efficiency by auxiliary function of the electric motor to the engine. Hard type is driven by engine and electric motor, The vehicle is driven only by an electric motor.

Until now, many hybrid vehicles have been implemented as soft type. The hybrid vehicle has an idle stop function, which stops the engine when the vehicle is stopped. In other words, when the vehicle is stopped while being stopped by a traffic light for a short time or stopped for a short time on the shoulder, the engine is turned off, thereby preventing unnecessary fuel consumption in the idle state.

However, in the case of the air conditioning system, when the engine stops, the operation of the compressor is stopped and the operation of the water pump is stopped, so that the flow of the cooling water is stopped and the indoor comfort can not be maintained.

In order to reflect these problems, in the case where the air conditioner is in the ON state until now, the logic to turn on the engine is automatically reflected when the temperature exceeds the predetermined temperature through the blower control, the constant time control and the evaporator temperature sensed by the thermistor have. Also, it is a reality that only idle mode (DEF MODE), which is a safe mode, has limited idle stop entry prohibition logic.

The conventional hybrid vehicle must be forcibly released by the ECON button in order to prevent the engine from being stopped even in the idling state. If the driver releases the ECON button again, I will drive in the state. As a result, the conventional hybrid vehicle is caused to operate in an operation state that the driver does not desire, thereby causing the vehicle fuel consumption to deteriorate.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an air conditioner for a vehicle that matches the indoor air conditioner performance of a vehicle, And to provide an air conditioning control method for a hybrid vehicle that can prevent the engine from being turned off even in an idle state in order to enable air conditioning performance to be exerted.

According to an aspect of the present invention, there is provided an air conditioner comprising: an engine and an electric motor for generating a driving force; an air conditioner connected to the engine and operable by driving the engine; An indoor / outdoor door provided in the air conditioner and a blower, an inside air sensor for providing discharge temperature information to the air conditioner controller, and an outside air sensor,

(a) determining indoor and outdoor environmental conditions of the vehicle in an idle state, (b) confirming the air conditioning mode of the room according to the determination in the step (a), (c) satisfying the air conditioning condition according to the air conditioning mode Judging whether or not an idle stop is entered; (d) issuing a prohibition of entry of an idle stop or an entering possibility signal according to the judgment in the step (c); and (e) And controlling the operation of the engine by the signal of the engine.

In step (a), it is determined whether the outside air temperature is higher or lower than the set temperature, whether the air conditioner is on or off, and whether it is solar radiation. In step (b) do.

If the air conditioning mode is the cooling mode, it is determined whether the position of the tempo door is lower than the reference position, the number of blowers is higher than the reference number, and the temperature of the evaporator is higher than the reference temperature, In the step (d), when the air conditioning conditions in the cooling mode are satisfied, an entry prohibition signal of the idle stop is issued.

In the step (c), when the air conditioning mode is the heating mode, it is determined whether the position of the tempo door is higher than the reference position, the number of the blowers is higher than the reference number, and the temperature of the cooling water is lower than the reference temperature. In step d), when the air conditioning conditions in the heating mode are satisfied, an inhibition signal of the idle stop is issued.

According to the air conditioning control method of the hybrid vehicle according to the present invention, it is possible to prevent entry into the idle stop against the will of the driver and to maintain the comfort of the vehicle occupant through the air conditioning control according to the indoor / So that it is possible to prevent a problem that the occupant must release the idle stop.

In addition, the fuel efficiency deterioration factor that may occur due to the driver's idle stop can be prevented in advance, thereby contributing to the fuel efficiency improvement.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an air conditioning system of a hybrid vehicle according to an embodiment of the present invention.

The air conditioning system of a hybrid vehicle according to the present invention includes an engine 100, an engine controller 200, an electric motor 300, an air conditioner 400, and an air conditioner controller 500.

The engine controller 200 controls the operation of the engine 100 by receiving a control signal from the air conditioning controller 520 of the air conditioning control unit 500 to be described later. Upon receipt of an idle stop entry prohibition signal from the air conditioning controller 520, the engine 100 is continuously operated without stopping, and when the idle stop enable signal is received from the air conditioning controller 520, the engine 100 is stopped.

The electric motor 300 serves to assist the engine 100 in the soft type hybrid vehicle.

The air conditioner 400 is interlocked by the power of the engine 100. Accordingly, when the engine stops, the air conditioner 400 is automatically stopped to stop the operation of the air conditioning system. The air conditioner 400 includes an air conditioner 430 and a heater 440, which will be described later.

The air conditioning control apparatus 500 includes an air conditioning control switch 510, an air conditioning controller 520, an inside air sensor 530, an outside air sensor 540, a blower motor 550 and an actuator 560. The air conditioning control apparatus 500 operates by receiving power from the battery 600.

The air conditioning control switch 510 includes a mode selection switch for selecting a discharge direction of air to be blown, a blower switch for selecting the number of stages of the blower, a temperature control switch for controlling the temperature, an on / off switch for the air conditioner, REC and an outside air button FRE.

The air conditioning controller 520 receives signals from the air conditioning control switch 510, the inside sensor 530 and the outside air sensor 540 to turn on / off the air conditioner 400, adjust the number of stages of the blower motor 550, The operation of the actuators 560 is controlled to perform the operation control for each mode.

FIG. 2 is a flow diagram showing the flow of indoor and outdoor through the air conditioning apparatus of FIG. 1;

2, the vehicle air conditioner 400 includes an inner / outer door 410, a blower 420, an air conditioner 430, a heater 440, a tempo door 450, vents 460, 461, 462, 463, And a door 470.

The outside or outside air is selectively introduced by the inside / outside doors 410, and the inside / outside doors 410 are operated by the actuators. The outside / outside door 410 is provided with an outside air sensor 540 for detecting outside air temperature.

The air or air flowing through the blower 420 passes through the air conditioner 430. At this time, in the cooling process, the air conditioner is turned on and the air is cooled. In the heating process, the air conditioner is turned off, and the air passes without being cooled.

The air that has passed through the air conditioner 430 is selectively discharged to the room without passing through the heater 440 or the heater 440 by the operation of the temp door 450. That is, in the cooling process, the heater 440 does not pass, and in the heating process, the heater 440 passes through the heater 440.

The air passing through the heater 440 is heated by heat exchange with the high temperature cooling water supplied from the engine 100. The high temperature cooling water is cooled through heat exchange with the air and then supplied again to the engine.

The air that does not pass through the heater 440 or passes through the heater 440 according to the cooling / heating condition is discharged to the room through various paths. The center vent 460, the side vent 461, and the floor door 470, In addition, it is discharged through the defrost vent 462 and the demister vent 463 to the front glass and the side glass. The side vent 461 and the floor door 470 are provided with an inside sensor 530 for sensing the temperature of the air discharged into the room.

The internal and external door 410, the blower 420, the air conditioner 430, the tempo door 450 and the like are operated under the control of the air conditioning controller 520.

3 is a schematic diagram showing the structure of the air conditioner shown in FIG.

The vehicle air conditioner 430 includes a compressor 431, a condenser 432, an expansion valve 433, and an evaporator 434, as shown in Fig.

The compressor 431 increases the pressure of the refrigerant so that the refrigerant vapor evaporated in the evaporator 434 in conjunction with the engine 100 is condensed.

The condenser 432 functions to forcibly cool the high-temperature and high-pressure refrigerant gas introduced from the compressor 431 using a cooling fan (cooling fan), thereby liquefying the refrigerant. As the refrigerant gas flows through the tube, heat is released to the outside air, and heat is released through the air passing between the pins.

The expansion valve 433 is installed at the inlet of the evaporator, and changes the high-pressure liquid refrigerant into a low-temperature low-pressure and low-pressure state through the throttling action and then sends it to the evaporator.

The evaporator 434 functions to heat and cool the low-temperature and low-pressure refrigerant in the inflated state, which is inflowed through the expansion process, into indoor air. The air that has lost the heat is cooled down, and this air is discharged to the inside of the vehicle by the blower to cool the room.

4 is a control flowchart showing a method for controlling air conditioning of a hybrid vehicle according to an embodiment of the present invention.

First, in the idle state, that is, in the idle state, the air conditioning controller 520 determines whether the indoor and outdoor environmental conditions of the vehicle satisfy the cooling condition (S10). That is, it is determined whether or not the outside air temperature is higher than a reference temperature (for example, 25 ° C), whether the air conditioner is on, and whether light is being introduced into the room from outside.

If all of the cooling conditions are satisfied, the air conditioning controller 520 confirms that the air conditioning mode of the room is the cooling mode (S20). If the cooling conditions are not satisfied, the process goes to a step of determining whether the indoor and outdoor environmental conditions of the vehicle satisfy the heating condition.

When it is confirmed that the indoor air conditioning mode is the cooling mode, the air conditioning controller 520 checks the air conditioning condition according to the cooling mode to determine whether or not the idle stop is entered (S30). In this process, it is determined whether or not the position of the tempdoor 450 is lower than the reference position, whether the number of stages of the blower 420 is higher than the reference stage number, and whether the temperature of the evaporator 434 is higher than the reference temperature .

If it is determined that the air conditioning conditions are satisfied, the air conditioning controller 520 issues an inhibition signal of an idle stop (S40). If the air conditioning conditions are not satisfied, the air conditioning controller 520 emits an enable signal of an idle stop (S50). That is, if all the air conditioning conditions are satisfied, the air conditioning controller 520 issues an idle stop entry prohibition signal (S40). Otherwise, the idle stop entry enable signal is issued (S50).

When the air conditioning controller 520 issues a signal to prohibit entry of an idle stop or to enter a signal, the engine controller 200 controls the operation of the engine 100. That is, when the signal for inhibiting the entry of the idle stop is received, the engine 100 continues to operate without stopping, and when the signal for entering the idle stop is received, the engine 100 is stopped.

On the other hand, if the cooling conditions are not satisfied, the air conditioning controller 520 determines whether the indoor and outdoor environmental condition of the vehicle satisfies the heating condition (S60). That is, it is determined whether or not the outside air temperature is lower than a reference temperature (for example, 10 ° C), whether the air conditioner is in the off state, and whether there is no incoming light from outside.

If all the heating conditions are satisfied, the air conditioning controller 520 confirms that the indoor air conditioning mode is the heating mode (S70). If the heating conditions are not satisfied, the process returns to step S10 to determine whether the indoor and outdoor environmental conditions of the vehicle satisfy the cooling conditions.

When it is confirmed that the indoor air conditioning mode is the heating mode, the air conditioning controller 520 checks the air conditioning condition according to the heating mode to determine whether or not the idle stop is entered (S80). In this process, it is determined whether or not the position of the tempdoor 450 is higher than the reference position, whether the number of stages of the blower 420 is higher than the reference stage number, and whether the temperature of the cooling water is lower than the reference temperature.

If it is determined that the air conditioning conditions are satisfied, the air conditioning controller 520 issues an inhibition signal of an idle stop (S40). If the air conditioning conditions are not satisfied, the air conditioning controller 520 emits an enable signal of an idle stop (S90). That is, if all of the above conditions are satisfied, the air conditioning controller 520 issues an idle stop entry prohibition signal (S40). Otherwise, the idle stop enable signal is issued (S90).

When the air conditioning controller 520 issues a signal to prohibit entry of an idle stop or a signal to enter an idle stop, the engine controller 200 controls the operation of the engine. In other words, when the signal for prohibiting the entry of the idle stop is received, the engine continues to operate without stopping, and the engine stops when the signal for entering the idle stop is received.

According to the air conditioning control method of the hybrid vehicle according to the present invention, it is possible to prevent entry into the idle stop against the will of the driver, and the comfort of the vehicle occupant is maintained through the air conditioning control according to the indoor / It is possible to prevent a problem that the interior of the vehicle is not comfortable and the idle stop must be released.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, have.

1 is a system diagram showing an air conditioning system of a hybrid vehicle according to an embodiment of the present invention,

FIG. 2 is a systematic diagram showing the flow of internal and external air through the air conditioning apparatus of FIG. 1,

FIG. 3 is a system diagram showing the structure of the air conditioner shown in FIG. 2,

4 is a control flowchart showing a method for controlling air conditioning of a hybrid vehicle according to an embodiment of the present invention.

Description of the Related Art

100: engine 200: engine controller

300: electric motor 400: air conditioner

410: Internal / External Door 420: Blower

430: air conditioner 431: compressor

432: condenser 433: expansion valve

434: Evaporator 440: Heater

450: Tempdoor 460: Center vent

461: side vents 470: floor door

500: air conditioning control device 510: air conditioning control switch

520: air conditioning controller 530:

540: Outdoor sensor 550: Blower motor

560: Actuator 600: Battery

Claims (4)

An air conditioner 400 that is connected to the engine 100 and is operable by driving the engine 100 and an air conditioner 400 that is connected to the engine 100 and the air conditioner An outside air door 410 and a blower 420 installed in the air conditioner 400 and an air conditioner controller 520 for controlling the air conditioner controller 520 to supply the discharge temperature information to the air conditioner controller 520 In the hybrid vehicle including the leaving sensor 530 and the outside air sensor 540, (a) determining whether the outside air temperature is higher or lower than the set temperature in the idle state, whether the air conditioner is in an on state or an off state, and whether or not it is solar radiation; (b) confirming whether the air conditioner mode of the desired room is a cooling mode or a heating mode according to the determination in the step (a); (c) determining whether or not the air conditioning condition satisfies different air conditioning conditions according to whether the air conditioning mode confirmed in step (b) is a cooling mode or a heating mode, and determining whether an idle stop is entered; (d) issuing an entry prohibition or entry enable signal to the idle stop according to the judgment in the step (c); And (e) controlling operation of the engine by the signal in the step (d) Wherein the determination as to whether the air conditioning condition is satisfied in the step (c) is performed by comparing the position of the tempo door, the number of blowers, and the evaporator temperature with a reference value. delete The method according to claim 1, In step (c), when the air conditioning mode is the cooling mode, it is determined whether the position of the tempo door is lower than the reference position, the number of blowers is higher than the reference number, and the temperature of the evaporator is higher than the reference temperature. Wherein the step (d) generates an entry prohibition signal for the idle stop when the air conditioning conditions in the cooling mode are satisfied. The method according to claim 1, In step (c), when the air conditioning mode is the heating mode, it is determined whether the position of the tempo door is higher than the reference position, the number of blowers is higher than the reference number of steps, and the temperature of the cooling water is lower than the reference temperature. Wherein the step (d) generates an entry prohibition signal for the idle stop when the air conditioning conditions in the heating mode are satisfied.

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