KR100958424B1 - How to display outside temperature for automobile - Google Patents

Abstract

Disclosed is an outdoor air temperature display method for a vehicle. The present invention is a first step of determining whether the key of the car is on; and a second step of comparing the time required to maintain the off of the car and the cooling time required for the influence of the temperature due to the convective heat of the radiator; A third step of comparing the temperature sensed by the ambient temperature sensor with the previously stored ambient temperature; and the temperature detected by the current ambient temperature sensor and the low temperature among the previously stored ambient temperature. A fourth step of setting the outdoor display temperature; and a fifth step of recognizing the set outdoor display temperature through a display, wherein the outdoor air temperature is measured without additional information from a vehicle speed sensor and a water temperature sensor for determining whether the vehicle is stopped. The temperature detected by the degree sensor is displayed as the outside temperature, and whether the vehicle stops is a rise in the temperature detected by the temperature sensor. Any more than a value determined hayeoseo the temperature rise due to the heat convection of the radiator due to the stop can be set slower ambient display rate of temperature increase.

Description

Display method of ambient temperature for vehicles

1 is a flowchart illustrating a conventional outdoor air on display operation for a vehicle;

2 is a block circuit diagram illustrating an outside air temperature measurement device according to the present invention;

3 is a flow chart illustrating the display of the outside temperature at the time of restarting FIG.

4 is a flow chart illustrating control during startup of FIG.

<Brief description of symbols for the main parts of the drawings>

21.Ambient sensor 22 ... A / D converter

23 Ambient temperature compensation part 24 Ambient temperature display part

The present invention relates to a method for measuring and displaying an outdoor air temperature for a vehicle, and more particularly, an outdoor air temperature display for detecting a sudden change in outdoor air temperature of a vehicle to accurately recognize the actual outdoor temperature and displaying a temperature. It is about a method.

Typically, automobiles include a cooling system for cooling the interior and a heating system for heating the interior. The cooling system is configured to cool the interior of the vehicle by heat exchange between the evaporator and the outdoor air in the cooling cycle in which the refrigerant discharged by driving the compressor circulates back to the compressor through the condenser, the receiver dryer, the expansion valve, and the evaporator, The heating system is configured to heat the interior of the vehicle by introducing coolant into the heater core and exchanging heat with the outdoor air.

Recently, an automatic air conditioning apparatus capable of automatically controlling air conditioning without the hassle of manual operation of a driver has been installed. Such an automatic air conditioning apparatus is capable of automatically controlling the air conditioner by measuring the outside air temperature while driving by placing the outside air temperature sensor in the rear of the grill or in front of the radiator having excellent air permeability.

Due to the positional limit, such an outside air temperature sensor incorrectly recognizes the outside air temperature due to convective heat emitted from the radiator as a real outside air temperature when parking.

According to the related art, when the cooling water temperature rises by a predetermined temperature or more by using a water temperature sensor to measure the actual outside air temperature, an excessive display temperature rise is prevented by slowing or fixing the rate of increasing the outdoor display temperature during parking.

Japanese Patent Laid-Open No. 10-16540, which discloses a temperature correction device having such an outside air temperature sensor, is shown in FIG.

Referring to FIG. 1, the outside temperature correction device is mounted at a front position of a radiator, and includes an outside air sensor that detects the outside air temperature, an engine cooling water temperature sensor that detects the engine cooling water temperature, and an outside air temperature data stored in the air conditioning control. By the data storage means, the differential calculation means which computed the outside temperature derivative value which is the change amount per unit time of the sensor detection outside air temperature from the outside air sensor when the detected water temperature by the engine cooling water temperature sensor is more than a preset temperature, and the outside air temperature derivative value calculation means The larger the calculated outside temperature derivative value is, the larger the delay time for increasing the outside temperature to a constant temperature is increased, and the corrected outside temperature is determined by the rising delay number determined by the outside temperature data obtained by the previous processing stored in the outside temperature data storage means. Calculate the outside temperature data and display outside temperature The external temperature data setting means set as the data is included.

Briefly explaining the operation of the temperature correction device as follows.

In step 11, it is determined whether the ignition changes from off to on. In step 12, it is determined from step 11 whether the engine cooling water temperature TW is equal to or higher than the set temperature TWO. In step 13, when the engine at the time of TW <TWO is not sufficiently warmed at the judgment of step 12, the outside temperature A / D input value TAD is directly recognized and the outside temperature data TA (= TAD) is obtained.

In step 15, the outside air temperature sensor A / D input value TAD is subtracted from the outside air temperature calculation memory data TAM, and the outside air temperature differential value ΔT, which is a change amount of the outside air temperature sensor A / D input value per constant processing cycle time, is calculated. .

In step 16, it is determined whether or not the outside temperature differential value ΔT is ΔT ≥ 0, that is, it is activated when the outside temperature rises, and if ΔT ≤ proceeds to step 13, and if ΔT ≥, proceeds to step 17 Done.                         

In step 17, the larger the outside temperature derivative ΔT, the larger the delay relaxation time characteristic of increasing the delay relaxation time Td on the rising side of the outside temperature, and the delay relaxation time Td is determined using the outside temperature derivative ΔT calculated in Step 15. do.

In step 18, the corrected outside temperature is determined by the delay relaxation time Td determined in step 17, and the value obtained by applying the corrected outside temperature to the outside air temperature calculation memory data TAM obtained by the previous process stored in the outside air temperature data storage means becomes the outside temperature data TA. The expression is TA = TAM + (Δt / Td) · ΔT.

After the engine starts, if the engine cooling water temperature TW detected by the water temperature sensor is not sufficiently warmed below the set water temperature TWO, the process proceeds to Step 11, Step 12, Step 13, and Step 18, and is detected by the water temperature sensor. When the engine cooling water temperature TW has become warm enough above the set water temperature TWO, it progresses to step 11, step 12, step 14, step 15, step 16, and step 17 in order.

As described above, when the detected water temperature by the engine cooling water temperature sensor is equal to or higher than the set temperature, the outside temperature derivative value calculation unit calculates the outside temperature derivative value, which is the amount of change per unit time of the sensor detection outside air temperature, from the outside sensor, and the rise delay time determining unit determines the outside air temperature. As the outside temperature differential value calculated by the derivative calculation means is larger, a decision is made to lengthen the delay time for raising the outside air temperature to a certain temperature. In the outside temperature data setting means, a value obtained by applying the corrected outside temperature according to the determined rise delay time to the outside temperature data obtained by the previous processing stored in the outside temperature data storage means is set as the outside temperature data for calculation and the outside temperature data for display. .                         

That is, in obtaining the outside air temperature data from the sensor detection outside air temperature, a small filtering effect is exhibited when the rising average of the sensor detection outside air temperature is small, and a large filtering effect may be exerted when the rising average of the sensor detection outside air temperature is large, and the outside temperature differential Value changes the degree of suppression of rise.

However, when the temperature sensor information is used to display the outside air temperature and the outside air sensor detection temperature is slowed or fixed to increase the outside air temperature increase rate in proportion to the excessive temperature rise, when the outside air temperature rises on a hotter ground ride in the underground parking lot in summer, However, if the change is due to normal outside temperature changes, such as moving from the highlands to the lowlands, the actual accurate temperature display may be delayed or unable to return to normal.

The present invention is to solve the above problems, it is located in the engine room to set the cooling time at startup in order to correct the value of the outside air temperature sensor to display the temperature, delay the display of the temperature according to the temperature rise rate during starting It is an object of the present invention to provide a method of displaying the outside temperature for automobiles.

In order to achieve the above object, the outdoor air temperature display method according to an aspect of the present invention,

A first step of determining whether the key of the vehicle is on;

A second step of comparing the time for which the automobile is kept off with the cooling time necessary for the influence of the temperature due to the convective heat of the radiator;                     

A third step of comparing the temperature sensed by the current outside temperature sensor and the previously stored outside temperature;

A fourth step of setting a temperature detected by a current outside air temperature sensor and a temperature lower than a previously stored outside air temperature to a current outside air display temperature; And

And a fifth step of recognizing the set outdoor display temperature through a display.

Also, in the second step,

If it is determined that the key-off holding time is less than the required cooling time, go to the third step of comparing the detected temperature with the stored outside temperature from the current outside temperature sensor, and vice versa from the outside temperature sensor. The detected temperature may be displayed as an outdoor display temperature.

Moreover, in the third step,

If it is determined that the temperature sensed by the outside temperature sensor is higher than the previously stored temperature, the previously stored outside air temperature is displayed as the outside air display temperature.

In addition, in the case of controlling during start-up by displaying the temperature detected by the outside temperature sensor as the outside display temperature,

Measuring a current ambient air temperature and storing a previous temperature; and,

Comparing the current measured outside air sensing temperature with the previous measured outside air sensing temperature; and                     

Comparing the rising width of the outside air detection temperature and the rising temperature setting reference temperature per unit time; and

Setting a rising speed; and,

Calculating a display temperature according to the rising temperature of the outside air sensing temperature; and

Recognizing the outdoor display temperature through the display; characterized in that it comprises a.

Further, in the step of comparing the current measured outside air sensing temperature with the previous measured outside air sensing temperature,

If it is determined that the current measured outside air sensing temperature is greater than the previously measured outside air sensing temperature, go to the step of comparing the outside air sensing temperature rise per unit time with the rising temperature setting reference temperature, and vice versa. Characterized in moving to the step.

Further, it is determined that the rising width of the outside air sensing temperature per unit time is greater than the rising temperature setting reference temperature, and moves to setting the delayed rising speed, and vice versa. .

Referring to the accompanying drawings, it will be described in detail the method for displaying the outdoor air temperature for a vehicle according to a preferred embodiment of the present invention.

2 is a block circuit diagram illustrating an outside air temperature measurement device according to an embodiment of the present invention.

Referring to the drawings, for displaying the outside air, an excellent outdoor air permeability, for example, the rear of the grill or the front of the radiator is provided with an outside air temperature sensor 21. The analog value detected by the ambient temperature sensor 21 is converted into a digital value by an A / D converter 22. With respect to this value, the outside temperature is corrected by the outside temperature correction unit 23 using the logic described below, and the corrected value can be displayed as the temperature by the outside temperature display unit 24.

FIG. 3 is a control flow chart for displaying the outside air temperature during restart by the outside air temperature compensation device of FIG. 2.

Referring to the drawings, when restarting after parking, the temperature detected by the outdoor temperature sensor is not displayed immediately. Instead, the outdoor air display temperature is stored for a predetermined time when the key of the automobile is turned off for the time determined that the coolant is cooled and the influence of the temperature rise due to the convective heat of the radiator is eliminated. It is a logic to set the low temperature of the ambient temperature sensor and the stored temperature to the present outside air display temperature when starting before a certain time, and to display the temperature detected by the outside temperature sensor when starting after a certain time. .

The flow chart is described below.

That is, after the key of the vehicle is turned on (S31), the time required to hold the key at the time of turning it off and the cooling water are cooled to compare the cooling time necessary for the effect of temperature rise due to convective heat of the radiator. (S32)

If it is determined that the required cooling time is greater than the holding time when the key is off, the temperature detected by the current outside temperature sensor is compared with the previously stored outside temperature (S33).

If it is determined that the temperature detected by the current outside temperature sensor is greater than the stored outside temperature, the stored outside temperature indicating the lower of the two temperatures is set to be displayed as the present outside temperature (S34).

The set current outside temperature can be recognized by the user through the display (S35).

On the other hand, if it is determined that the time that is maintained when the key is off is less than the required cooling time, the temperature detected by the outside temperature sensor is set to be displayed as the current outside temperature. (S36) After a predetermined time, the outside air temperature is set. The temperature detected by the degree sensor is displayed as a current outside air temperature and recognized through a display.

4 is a flow chart illustrating the control flow during startup of FIG. 3.

This flowchart is control logic for detecting the case where the temperature abnormally rises due to heat in the engine.

Referring to the drawing, it is determined whether the key is on. (T41) If the key is off, the outdoor air display temperature is stored as the previous temperature state. (T50)

If it is determined that the key is on, the temperature detected by the current outside air temperature sensor is measured, and the previous temperature is stored.

Next, the temperature detected by the current outside air temperature sensor is compared with the previously stored temperature (T43).

If it is determined that the temperature detected by the current outside air temperature sensor is greater than the previously measured temperature, the rising width of the temperature detected by the outside air temperature sensor per unit time is compared with the set reference temperature of the elevated temperature.

If it is determined that the rising temperature of the temperature sensed by the outside air temperature sensor per unit time is larger than the set temperature of the rising temperature, the delayed rising speed is set.

On the other hand, if it is determined that the rising temperature set reference temperature is greater than the rising width of the temperature detected by the outside air temperature sensor per unit time, the general rising speed is set.

On the other hand, in step T43, if the previously stored temperature is a large temperature detected by the current outside air temperature sensor, it sets the descending rising speed (T48).

For example, in the case where the temperature rise is abrupt, in step T45, the outdoor air temperature is delayed at a rate of 1 ° C / 10min when the temperature rises by 4 ° C / 4min or more in order to delay the speed. On the other hand, in the T49 step, which is a general temperature increase region, when the temperature rises below 4 ° C./4 min, the outdoor temperature is delayed at a rate of 1 ° C./4 min. On the other hand, in the step T48, which is the rising and falling speed setting section, the outdoor temperature is delayed by 1 ° C / 2sec.

The temperature value of delaying the outside air temperature of the above three stages calculates the display temperature according to the rising speed of the temperature detected by the outside air temperature sensor (T46).

The corrected display temperature is recognizable from the outside through a display indicating the outdoor display temperature. (T47)

As described above, the outdoor temperature display method for automobiles of the present invention can obtain the following effects.                     

First, the temperature detected by the outside temperature sensor is displayed as the outside temperature without additional information from the vehicle speed sensor and the water temperature temperature sensor to determine the parking stop of the vehicle. If it is more than this arbitrary value, it can judge that it is the temperature rise by the convective heat of a radiator by a stop, and can set a slow rate of outdoor air display temperature.

Second, when the temperature difference occurs suddenly due to the ground running from the underground parking lot or the rapid movement from the upland to the lowland and the delayed effect, the limit of the rising speed of the display temperature of the outside air is set so that an increase in the inconsistent section can be prevented.

Third, when restarting after parking, the temperature is not immediately displayed by the outside air temperature sensor, and it is memorized for a certain time when it is judged that there is no influence of the temperature rise by the convective heat of the radiator. The lower temperature among the temperature is set as the current outside air display temperature, and after a certain time, it has the outside air temperature correction logic when restarting to display the temperature detected by the outside air temperature sensor.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (6)

A first step of determining whether the key of the car is on; and A second step of comparing the time for which the vehicle is kept off with the cooling time required for the influence of the temperature due to the convective heat of the radiator; and, A third step of comparing the temperature sensed by the current outside temperature sensor with the previously stored outside temperature; and A fourth step of setting a temperature detected by a current outside air temperature sensor and a temperature lower than the previously stored outside air temperature to a current outside air display temperature; And a fifth step of recognizing the set outdoor display temperature through a display. In the case of controlling during startup by displaying the temperature sensed by the outside temperature sensor as the outside air display temperature, Measuring a current ambient air temperature and storing a previous temperature; and, Comparing the current measured outside air sensing temperature with the previous measured outside air sensing temperature; and Comparing the rising width of the outside air detection temperature and the rising temperature setting reference temperature per unit time; and Setting a rising speed; and, Calculating a display temperature according to the rising temperature of the outside air sensing temperature; and Recognizing the outdoor display temperature through the display; includes, In the step of comparing the current measured outside air sensing temperature with the previous measured outside air sensing temperature, If it is determined that the current measured outside air sensing temperature is greater than the previously measured outside air sensing temperature, go to the step of comparing the outside air sensing temperature rise per unit time with the rising temperature setting reference temperature, and vice versa. How to display the outdoor air temperature for a vehicle, characterized in that moving to a step. delete delete delete delete The method of claim 1, It is determined that the rising width of the ambient air detection temperature per unit time is greater than the rising temperature setting reference temperature, and the process moves to setting the delayed rising speed, and vice versa. How to display outside temperature.

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