KR100633328B1 - Method for controlling an air-conditioner of vehicle - Google Patents

Abstract

A control method of an air conditioner for a vehicle is provided to improve fuel efficiency by minimizing increase of idle rpm of an engine, and to extend the life span of a battery by decreasing unnecessary power consumption of the air conditioner. An ECU compares vehicle speed from a vehicle speed sensor with zero(S1), and initializes a clock in case of the vehicle speed to be zero(S2). The ECU decides if duty of an alternator is more than 98%(S3), and maintains the reference idle rpm of an engine in case of the duty of the alternator to be below 98%(S4). The ECU decides the passage over 30 minutes at the vehicle speed of zero in case of the duty of the alternator to be more than 98%(S5). The ECU increases idle rpm of the engine, and starts decision of the duty of the alternator(S6). The ECU decides reduction of the stage of a blower by an air conditioner control unit(S7), and reduces the stage of the blower with the air conditioner control unit and initializes the clock(S8).

Description

Method for controlling an air-conditioner of vehicle

1 is a schematic configuration diagram according to a conventional air conditioner control method of a vehicle,

2 is a flowchart illustrating a method for controlling an air conditioner in a vehicle of the present invention;

Figure 3 is a schematic diagram according to the air conditioner control method of the vehicle of the present invention.

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

S1: vehicle speed determination step S2: clock initialization step

S3: Alternator duty determination step S4: Idle rotation maintenance step

S5: time judging step S6: idle speed increase step

S7: Blower stage reduction stage S8: Blower stage reduction stage

S9: Compressor stop step 10: Lee See You (ECU)

11: clock 20: vehicle speed sensor

30: alternator 40: engine

50: air conditioning control device 51: blower

52: compressor

The present invention relates to a method for controlling an air conditioner of a vehicle, and more particularly, a method for optimally controlling an air conditioner according to an alternator duty state of a vehicle, and controlling the air conditioner to an optimal state according to the alternator duty state of the vehicle. In addition, the present invention relates to a method capable of increasing vehicle quietness and fuel economy.

In general, the battery provided in the vehicle is charged through an alternator that generates power by receiving the rotational force of the engine, and consumes power through various electrical appliances provided in the vehicle.

In particular, the electrical equipment that accounts for most of the power consumption of the battery is an air conditioner. When the electric load is about 80A in the idle state of the engine, the electric load of the air conditioner reaches 40A, which is about 50%.

Accordingly, in order to increase the charge of the battery through the alternator according to the operation of the air conditioner is simply increasing the engine speed.

1 is a schematic configuration diagram according to a conventional method for controlling an air conditioner of a vehicle.

In the conventional method of controlling an air conditioner of a vehicle, as shown in FIG. 1, when the air conditioner is operated, the EC 1 (ECU) repeatedly raises the idle rotation speed of the engine 3 to increase the output of the alternator 2. The battery will charge the power required by the vehicle.

However, since the idle speed of the engine is reduced to improve the quietness and fuel efficiency of the vehicle, the amount of alternator generation has been decreasing, while the power consumption of electronic equipment including air conditioners has been increased to increase engine power and improve indoor comfort. The trend is causing overheating of engines and performance dissatisfaction of air conditioners. In particular, the conventional air conditioner control method of a vehicle increases the power generated by the alternator by simply increasing the idle speed of the engine, thereby reducing vehicle quietness and fuel economy. There was a technical problem that is greatly reduced.

The present invention is to solve the above problems, the air conditioner control of the vehicle to control the air conditioner in the optimal state in accordance with the alternator duty state of the vehicle to increase the durability of the battery, and to improve the quietness and fuel economy of the vehicle To provide a method.

The present invention includes a vehicle speed determination step of determining whether the vehicle speed detected by the vehicle speed sensor is Lee Yu-Yu; A clock initialization step of initializing a clock, which is additionally provided to the IC, to zero when the vehicle speed is zero in the vehicle speed determining step; An alternator duty determining step of determining whether the duty of the alternator is 98% or more after the clock initialization step; An idle rotation speed maintenance step of maintaining the engine at a reference idle speed when the duty of the alternator is less than 98% in the alternator duty determination step; A time determination step of determining whether 30 minutes have elapsed in the state of the vehicle speed 0 when the duty of the alternator is 98% or more in the alternator duty determination step; When 30 minutes have not elapsed while the vehicle speed is 0 in the time determination step, the LSI increases the idle rotation speed of the engine and is configured by the idle rotation speed increasing step in which the alternator duty determination step is started.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a method for controlling an air conditioner for a vehicle of the present invention, and FIG. 3 is a schematic configuration diagram according to the method for controlling an air conditioner for a vehicle of the present invention.

As shown in FIGS. 2 and 3, a method for controlling an air conditioner of a vehicle according to the present invention includes: a vehicle speed determining step S1 of determining whether the vehicle speed detected by the vehicle speed sensor 20 by Lee C. 10 is zero; A clock initialization step S2 for initializing the clock 11 additionally provided in the ISO 10 to 0 when the vehicle speed is 0 in the vehicle speed determining step S1; An alternator duty determining step (S3) of determining whether the duty of the alternator 30 is 98% or more after the clock initialization step (S2); When the duty of the alternator 30 is less than 98% in the alternator duty determination step (S3), the idle speed maintenance step (S4) for the Lee C oil 10 to maintain the engine 40 at the reference idle speed; When the duty of the alternator 30 is 98% or more in the alternator duty determination step (S3), the time judging step (S5) to determine whether 30 minutes has elapsed in the state that the Lee C 10 is at a vehicle speed of 0; When 30 minutes have not elapsed while the vehicle speed is 0 in the time determination step S5, the idle oil 10 increases the idle rotation speed of the engine 40 and starts the alternator duty determination step S3. It is a technical basic feature to consist of the speed increase step S6.

At this time, when 30 minutes have elapsed in the state of the vehicle speed 0 in the time determination step (S5), the number of blowers to determine whether Lee C. (10) reduced the number of stages of the blower 51 through the air conditioning control device (50) A determination step S7; If the number of stages of the blower 51 is not reduced in the blower stage reduction determination step (S7), the Lee C 10 reduces the number of stages of the blower 51 through the air conditioning control device 50, and initializes the clock. Preferably, the blower stage reducing step S8 at which S2 starts is further configured.

In addition, when the number of stages of the blower 51 is reduced in the blower stage reduction determination step (S8), the Lee C 10 stops the compressor 52 through the air conditioning control device 50 for a predetermined time, and Most preferably, the compressor stop step (S9) at which the alternator duty determination step (S3) starts is further configured.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 2 and 3.

As shown in FIGS. 2 and 3, the method for controlling the air conditioner of the vehicle of the present invention configured as described above automatically controls the blower 51 and the compressor 52 of the air conditioner according to the duty of the alternator 30 and the stop time. It is a control method that can reduce power consumption to an optimal state.

Hereinafter, each step will be described in detail with reference to the drawings.

First, in the vehicle speed determination step (S1), it is determined whether the vehicle speed detected by the ECU 10 through the vehicle speed sensor 20 is 0 km / h.

At this time, when the vehicle speed detected by the vehicle speed sensor 20 is not 0km / h, that is, when the vehicle is in a driving state, no separate control is performed.

However, when the vehicle speed detected by the vehicle speed sensor 20 is 0km / h, that is, the stop state, the clock initialization step S2 is started.

In the clock initialization step (S2), the clock 11 additionally provided inside the IC 10 is initialized to 0. In this case, the clock 11 continuously accumulates time until the clock is initialized to 0. It is done.

In the alternator duty determination step (S3) after the clock initialization step (S2), the Lee C 10 determines whether the current alternator 30 duty is 98% or more.

Here, the alternator 30 duty represents the power consumption of the electrical appliance with respect to the generated power of the alternator 30 as a percentage. When the alternator 30 duty is 98% or more, the power consumption exceeds the generated power and causes the battery to discharge. do.

Therefore, when the alternator 30 duty is less than 98% in the alternator duty determination step S3, the idle rotation speed maintenance step S4 is started. In the idle rotation speed maintenance step S4, the Lee C. 10 is The engine 40 is maintained at a reference idle speed, that is, the normal idle speed, and no separate control is performed.

However, when the alternator 30 duty is 98% or more in the alternator duty judging step S3, the power generation of the alternator 30 falls short of the power consumption of the electronic device, and the time judging step S5 is performed. Begins.

In the time determining step S5, the Cee 10 determines whether the time of the clock 11 has elapsed 30 minutes while the vehicle speed detected by the vehicle speed sensor 20 is 0 km / h.

When 30 minutes have not elapsed in the time determining step (S5), the LEE 10 simply increases the idle speed of the engine 40 slightly to increase the power generated by the alternator 30, and then, the alternator The duty judging step S3 is started again.

On the other hand, when 30 minutes have elapsed in the time determination step (S5), the blower stage reduction determination stage (S7) is started, and in the blower stage reduction determination stage (S7), Lee C. (10) is the air conditioning control device (50). It is determined whether the number of blowers 51 has been reduced.

That is, in the blower stage reduction determination step (S7), for example, it is determined whether the stage of the blower 51 is currently 4 stages or previously reduced from 4 stages to 2 stages.

At this time, the ICC 10 and the air conditioning control device 50 is connected to enable mutual CAN communication, so that the YCC 10 can control the air conditioning control device 50 freely.

Then, if the number of stages of the blower 51 is not reduced in four stages in the blower stage reduction determination step S7, the blower stage reduction stage S8 is started.

In the blower stage reduction step (S8), the Lee C. 10 reduces the stage of the blower 51 through the air conditioning control device 50.

At this time, in the blower stage reduction step S8, it is preferable that the Lee C. 10 reduces the number of stages of the blower 51 from 4 stages to 2 stages through the air conditioning control device 50.

After the blower stage reduction step S8, the clock initialization step S2 is started again.

However, if the number of stages of the blower 51 has already been reduced from four stages to two stages, for example, in the blower stage reduction determination step S7, the compressor stop stage S9 is started.

In the compressor stop step (S9), the C. oil 10 temporarily stops the compressor 52 through the air conditioning control device 50.

At this time, in the compressor stop step (S9) it is preferable in the present invention that the oil C. 10 stops the compressor 52 for one minute through the air conditioning control device (50).

After the compressor stop step (S9), the alternator duty determination step (S3) is started again.

When the case is controlled by the air conditioner control method of the vehicle of the present invention as described above clearly described as follows.

First, when the vehicle speed is 0, the clock 11 is initialized. If 30 minutes elapse with the alternator 30 duty being 98% or more, the clock 11 is initialized and the number of stages of the blower 51 is forcibly reduced.

Thereafter, even when the blower 51 is reduced in number, the duty of the alternator 30 can be forcibly reduced by temporarily stopping the compressor 52 of the air conditioner when 30 minutes have elapsed while the alternator 30 duty is 98% or more. It is.

Therefore, according to the air conditioner control method of the vehicle of the present invention, when the vehicle is stopped and 30 minutes have elapsed while the power consumption is higher than that of the alternator 30, the number of blowers 51 is changed through the air conditioning control device 50. Forcibly reducing, and if the condition persists after an additional 30 minutes, by forcibly stopping the compressor 52 of the air conditioner, it is possible to minimize the idle rotation of the engine 40 to minimize the quietness and fuel economy of the vehicle Not only can it be greatly increased, it can also optimize the power consumption of unnecessary air conditioners, while also extending the life of the battery.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the scope of the present invention is not limited to the above drawings and embodiments.

The present invention as described above is an invention that can increase the durability of the battery by controlling the air conditioner in an optimal state according to the alternator duty state of the vehicle, and also improve the quietness and fuel economy of the vehicle.

Claims (5)

A vehicle speed judging step of determining whether the vehicle speed detected by the vehicle speed sensor is 0; A clock initialization step of initializing a clock, which is additionally provided to the IC, to zero when the vehicle speed is zero in the vehicle speed determining step; An alternator duty determining step of determining whether the duty of the alternator is 98% or more after the clock initialization step; An idle rotation speed maintenance step of maintaining the engine at a reference idle speed when the duty of the alternator is less than 98% in the alternator duty determination step; A time determination step of determining whether 30 minutes have elapsed in the state of the vehicle speed 0 when the duty of the alternator is 98% or more in the alternator duty determination step; When 30 minutes have not elapsed while the vehicle speed is 0 in the time determining step, the ISI increases the idle rotation speed of the engine, and the idle rotation speed rising step starts the alternator duty determination step. Air conditioner control method. According to claim 1, When the 30 minutes have elapsed in the state of the vehicle speed 0 in the time determination step, Blower stage reduction determination step for determining whether the Lee Yyu reduced the number of blowers through the air conditioning control device; If the number of blowers is not reduced in the number of blower stages, the number of blowers is reduced through the air conditioning control device, and the number of stages of blowers is further configured to start the clock initialization step. Air conditioner control method. According to claim 2, wherein when the number of blowers is reduced in the blower stage decrease determination step, the compressor stopping step for stopping the compressor for a predetermined time through the air conditioning control device, and the alternator duty determination step is further configured. Air conditioner control method for a vehicle, characterized in that the. The method of controlling the air conditioner of a vehicle according to claim 2, wherein the step of reducing the number of blowers comprises reducing the number of stages of the blower from four stages to two stages through the air conditioning controller. The method of controlling the air conditioner of a vehicle according to claim 3, wherein in the compressor stopping step, the compressor stops the compressor for one minute through the air conditioning control device.

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