JP2000135917A - Intake door control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clealy inform a user of the controlled state of an intake door corresponding to the polluted state of outside air. SOLUTION: This control device is provided with an intake switching control means (d) for controlling driving of an intake door actuator (g) so as to set an outside air mode in the clean state of outside air low in exhaust gas concentration and to set an internal air mode in the polluted state of outside air high in exhaust gas concentration. The control device is also provided with a display means (e) constituted to display the polluted state of outside air, and a display control means (f) for controlling the display means (e) to display the polluted state of outside air on the basis of exhaust gas concentration obtained by an exhaust gas concentration computing means (c).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for detecting the concentration of exhaust gas outside a vehicle compartment, and setting the side to the outside air introduction mode when the outside air is clean, and setting the side to the inside air (circulation) mode when the outside air is contaminated. Belongs to the technical field of door control devices.

[0002]

2. Description of the Related Art Conventionally, as an intake door control device, for example, a device described on pages 149 to 152 of "Academic Lecture Meeting of the Society of Automotive Engineers of Japan, Preprint 975" (issued in October 1997) is known. Are known. In the above conventional source, it is provided at the outside air intake of the air conditioner unit mounted on the car,
An intake door that switches between an outside air mode and an inside air mode by an intake door actuator, an exhaust gas sensor that is installed in a vehicle and detects an exhaust gas concentration of the outside air,
The sensor signal from the exhaust gas sensor is input, and it is determined whether the outside air is in a clean state or a contaminated state based on whether the gas concentration sensor value is equal to or greater than a set threshold value. An apparatus including a control unit that controls the drive of a servomotor that operates the intake door so as to be in the inside air mode in a polluted state is described.

[0003]

Displaying the state of the intake door is generally performed in an air conditioner of a vehicle. For example, the temperature of the blown air, the amount of blown air, and the outlet of the air are determined according to a set temperature. In an air conditioner that automatically controls the switching between the inside air and the outside air, the outside air suction (FRE) and the automatic control (AUT) are performed according to the state of the intake door.
O), it is known to switch the three types of display of the inside air circulation (REC). However, in such a display of the intake door, for example, even if the display of the inside air circulation (REC) is made, However, there is a problem that it is not clear whether the control is performed by the control according to the outside air pollution state as described above or the control according to the temperature of the set temperature of the air conditioner. In addition, the above intake door control device is
Since this is to prevent contaminated air such as exhaust gas from entering, even if the state changes from the outside air intake state to the inside air circulation based on this control, the switching of the above three indications alone causes the intake door to change. There is a problem that the effect of the control device is difficult for the user to understand.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an intake door control capable of clearly informing a user how the intake door is controlled in accordance with the dirt condition of the outside air. It is intended to provide a device.

[0005]

In order to achieve the above-mentioned object, an invention according to claim 1 is provided at a suction port of a vehicle-mounted air conditioner unit as shown in a claim correspondence diagram of FIG. g, an intake door a switched between an outside air mode and an inside air mode,
An exhaust gas sensor b that is installed in the vehicle and detects the exhaust gas concentration of outside air; an exhaust gas concentration calculating unit c that receives a sensor signal from the exhaust gas sensor b and calculates the exhaust gas concentration based on the sensor signal; On the basis of the exhaust gas concentration obtained by the exhaust gas concentration calculating means c, the intake door actuator is set to the outside air mode when the exhaust gas concentration is low and the inside air mode when the exhaust gas concentration is high. In the intake door control device including the suction switching control means d for controlling the driving of the g, the display means e configured to be able to display the dirt state of the outside air and the exhaust gas concentration calculation means c. A display control means f for controlling the display means e to display the contamination state of the outside air based on the exhaust gas concentration is provided. Thus, according to the first aspect of the present invention,
The display means e displays the state of contamination of the outside air based on the exhaust gas concentration obtained by the exhaust gas concentration calculating means c. Therefore, the user can know the dirt condition of the outside air,
Therefore, the user does not smell the polluted air such as the exhaust gas even if the outside air is dirty, so that the user can know the effect of the intake door control device.

[0006] Also, as described in claim 2, claim 1
In the intake door control device described above, the display means e is configured to be capable of displaying the outside air introduction state in addition to the outside air contamination state, and the display control means f is configured to display the outside air contamination state by the display means e. It is preferable to perform a control for displaying the outside air introduction state in addition to the control. Thus, according to the second aspect of the present invention, the display means e
Accordingly, the outside air introduction state is displayed in addition to the outside air contamination state. Therefore, the user can clearly know how the intake door a is controlled according to the dirt condition of the outside air.

[0007] Also, as described in claim 3, claim 2
In the intake door control device described above, the display means e includes an outside air monitor unit that displays dirt on the outside air in a plurality of stages, and a ventilation monitor unit that displays the outside air introduction state in a plurality of stages according to the introduction ratio of the outside air. Preferably, it is provided. Therefore, the user can clearly know the outside air contamination and the outside air introduction ratio, and thereby can more clearly know how the intake door a is controlled according to the outside air contamination state. it can.

[0008] Also, as described in claim 4, claim 1
In the intake door control device according to any one of the first to third aspects, it is preferable that the display means e is constituted by a television monitor.
Therefore, in recent years, vehicles equipped with a television monitor, such as vehicles equipped with a navigation system, have been increasing. In such vehicles, an existing television monitor can be used, so that the cost of the apparatus is reduced. be able to. In addition, as described in claim 5, claim 1
In the intake door control device according to any one of the first to third aspects, the display unit e may be configured by a display device such as an LED or a liquid crystal.

[0009]

(Embodiment 1) Embodiment 1 corresponds to the invention described in the claims. FIG. 2 shows the first embodiment.
1 is an overall system diagram showing an intake door control device of FIG. In FIG. 2, 1 is an intake door, 2 is an outside air inlet, 3 is an inside air inlet, 4 is a deodorizing filter, 5 is a blower,
6 is a blower motor, 7 is a servo motor (corresponding to an intake door actuator in the claims), 8 is an exhaust gas sensor, 9 is a door position sensor, 10 is a vehicle speed sensor, 11 is an outside temperature sensor, and 12 is an air conditioner control unit. , 13 is a control unit, 14 is a blower air volume signal, 15 is a compressor signal, 16 is a mode signal, and 17 is a television monitor.

The intake door 1 is disposed on the suction side of the blower 5, and is driven by a servomotor 7 as an intake door actuator. Then, the fresh position (FRE) of the intake door 1 that blocks the inside air inlet 3
Then, it becomes 100% of outside air introduction rate, that is, outside air mode,
Conversely, at the recirculation position (REC) of the intake door 1 that blocks the outside air intake port 2, the outside air introduction rate of 0%,
That is, the inside air mode is set. In addition, the intake door 1
A deodorizing filter 4 for preventing exhaust gas odor by activated carbon or the like is arranged between the blower 5 and the blower 5.

The exhaust gas sensor 8 outputs a voltage signal Vs corresponding to the gas concentration by utilizing a change in resistance value due to the presence of gas. That is, the gas sensor element is composed of a gas detection section provided on a ceramic substrate with SnO2 as a main component, and a heater section for performing heating for promoting a reaction to the gas. When reacted, the electrical resistance changes due to the oxidation-reduction reaction. The exhaust gas sensor 8 is installed on a front grille that can efficiently and efficiently detect exhaust gas.
By providing the exhaust gas sensor 8 on the front grille portion that can detect the exhaust gas at the upstream side of the intake door 1 as the flow of air, the exhaust gas can be more reliably prevented from entering the passenger compartment.

The door position sensor 9 detects the door opening position of the intake door 1 and provides the signal processing circuit 13 with door opening feedback information. The vehicle speed sensor 1
0 indicates the vehicle speed Vc and outputs the vehicle speed information to the signal processing circuit 13.
Give to. The outside temperature sensor 11 detects outside temperature AMB and provides outside temperature information to the signal processing circuit 13.

The air conditioner control unit 12
Is to detect changes in vehicle interior temperature due to changes in outside temperature, changes in the amount of solar radiation, changes in the number of occupants, etc., and once set to the desired temperature, always keep the vehicle interior temperature constant.
It has a cooling cycle (not shown) and a heating temperature control unit using engine cooling water, and automatically controls the switching of the outlet air temperature, the outlet air volume, the inlet and the outlet by a microcomputer.

The signal processing circuit 13 is one of the control units provided in the air conditioner control unit 12. The exhaust gas sensor 8 detects the state of contamination of the outside air by the exhaust gas, and controls the drive of the intake door 1. As a result, control for automatically switching the suction port is performed, and control for displaying the dirt condition of the outside air and the introduction ratio of the outside air on the television monitor 17 is performed. The signal processing circuit 13 includes, as internal signals, a blower air volume signal based on a blower motor voltage value, a compressor signal for monitoring on / off of an air conditioner, whether or not a differential mode (DEF), or an auto recirculation mode. A mode signal for monitoring whether (auto REC) is provided.

The television monitor 17 is provided on an instrument panel (not shown), for example, as a display device of a well-known navigation system. An intake door control display mode is set as one of the display modes. ing. In the intake door control display mode, as shown in FIG.
7a, a strong dirt display 17b indicating strong dirt, a medium dirt display 17c indicating medium dirt, a small dirt display 17d indicating small dirt, and a clean display 17e indicating fresh air. The vehicle is provided with a vehicle exterior air monitor 17f that indicates the state of contamination of vehicle exterior air, and a ventilation monitor 17g that indicates the intake ratio of outside air by arrows.

In the ventilation monitor section 17g, if there is no display of an arrow, the outside air intake ratio is 0%, and in the case of one or two arrows, the outside air intake ratio is 5-35%.
In the three arrows, the outside air intake ratio is 40%
The display of four arrows (all arrows) indicates that the outside air intake ratio is 100%.

Next, the operation will be described. [Regarding Intake Door Control Operation] FIG. 3 is a flowchart showing the flow of the intake door control operation executed in the signal processing circuit 13 of the first embodiment. Each step will be described below.

In step 30, a gas sensor value process for obtaining an arithmetic gas sensor value FGSC from a gas sensor A / D value GSAD, which will be described later, and a display process on the television monitor 17 are performed by a subroutine call.
In step 31, it is determined whether or not 60 seconds (sufficient time from when the power is turned on until the sensor output stabilizes) have elapsed since the ignition switch was switched from OFF to ON. Before 60 seconds, step 3
Proceeding to 2, the timer counter of the delay timer from REC to FRE is initialized. In step 33, it is determined whether or not the automatic REC mode is used to fix the intake port to the inside air mode (REC). When the automatic REC mode is selected, the routine returns without performing the exhaust gas corresponding intake door control. In step 34, it is determined whether or not the differential mode is selected. When the differential mode is selected, the routine returns without performing the exhaust gas corresponding intake door control.

In step 35, the door opening corresponding to the control characteristic graph-3 shown in FIG. 6 and the calculation gas sensor value FGSC obtained in step 30 is determined, and the delay time Rsec (for example, 20 sec. 30 sec) is set. In graph-3 of the control characteristic in FIG. 6, the characteristic indicated by the solid line, which is the characteristic during normal running, is the characteristic when the vehicle speed is less than 80 km / h. By the way, the vehicle speed is 8
At 0 km / h or more, as shown by the dotted line in the figure, control of the characteristic of switching between 100% outside air introduction and inside air circulation is executed based on the magnitude relationship with the threshold value TH4, but details of this control are omitted. . The following step 351
Then, it is determined whether or not the calculation gas sensor value FGSC = 0, and if FGSC ≠ 0, the process proceeds to step 3
6, if FGSC = 0, the routine proceeds to step 352, where a process for setting the target door opening FTI = 0 is performed, and then to step 36. In step 36, REC → FRE
It is determined whether or not the movement is in the direction, and when NO (FRE →
(When moving in the REC direction), the process proceeds to step 37, where YE
In the case of S (when moving in the direction from REC to FRE), the process proceeds to step 39. In step 37, the timer counter of the delay timer is initialized. In step 38, step 3
The door opening determined in 5 is set as the target door opening FTI.

In step 39, it is determined whether or not the delay time Rsec has elapsed. If the delay time Rsec has elapsed, the process proceeds to steps 37 and 38,
Initialization of the timer counter and setting of the target door opening FTI are performed. In step 40, before the delay time Rsec elapses, the target door opening FTI is held. However, the continuous time for maintaining the fully closed state is set to a maximum of 15 minutes or less in consideration of an increase in the CO2 concentration in the vehicle interior. This continuous time can be controlled in consideration of an increase in the CO2 concentration in the vehicle cabin by, for example, detecting the number of occupants with an occupant sensor and shortening the number as the number of occupants increases. In step 41, step 38
Alternatively, a command value for obtaining the target door opening FTI set in step 40 is also output to the servo motor 7.

[Regarding Intake Door Control Corresponding to Exhaust Gas Concentration] In the graph-3 of the control characteristics used in the processing of step 35, as shown in FIG. 6, the vehicle speed is 80 km / h.
In the following normal running, the control threshold
Threshold value TH1, second threshold value TH2, third threshold value T
H3 is set, and the calculation gas sensor value FGSC is set to the first
If the threshold value is less than the threshold value, the inside air mode is set, and the calculation gas sensor value FGSC is changed from the first threshold value TH1 to the third threshold value TH.
In the region up to 3, the variable opening mode is set in which the opening degree of the door is changed to the inside air mode as the calculation gas sensor value FGSC decreases, and the calculation gas sensor value FGSC is changed from the third threshold value TH3 to the second threshold value TH2. In the region up to, the door opening is set to the intermediate opening mode in which the predetermined opening is set, and in the region where the calculation gas sensor value FGSC is equal to or more than the second threshold TH2, the outside air mode is set. Graph-3 of this control characteristic is set in advance based on the correlation characteristic of the calculation gas sensor value FGSC with respect to the odor intensity and the CO concentration in the vehicle cabin acquired by the actual vehicle running test. Thus, the graph-3 of the control characteristic is set in correlation with the actual odor, and the outside air introduction region is expanded by the region of the variable opening mode from the first threshold value TH1 to the third threshold value TH3. By doing so, it is possible to perform efficient ventilation while suppressing the intrusion of odor in accordance with the sense of the user.

[Gas Sensor Value Processing and Display Processing] FIGS. 4 and 5 are flowcharts showing the flow of gas sensor value processing performed by the signal processing circuit 13.
Steps 50 to 57 correspond to a gas sensor value GSC (0% to 100%) indicating the exhaust gas concentration from the sensor measurement value.
%) With the gas sensor A / D value GSAD and the clean air value GS
In the step of calculating by MX, the variation, temperature, and humidity characteristics of the sensor alone are corrected by using the clean air value GSMX as a reference value instead of directly converting the gas sensor A / D value GSAD into a gas concentration (exhaust gas). (Corresponds to gas concentration calculating means c)).

In step 50, the gas sensor A / D value GSAD is calculated by the equation GSAD = 255-GSAD. The GSAD in the equation is the exhaust gas sensor 8
The gas sensor A / D value obtained by the measurement read in the current processing is subtracted from the value of 255 because the degree of air contamination is represented by 255 bits and the characteristics are inverted. Therefore, the maximum clean air value of the gas sensor A / D value GSAD is 255,
The maximum dirty air value is zero.

In step 51, it is determined whether or not a set time of 60 seconds (sufficient time from when the power is turned on until the sensor output is stabilized) has elapsed since the ignition switch was turned from OFF to ON.
The process proceeds to step 53 if YES. In step 52, a preset initial value is set as the gas sensor A / D value GSAD before 60 seconds have elapsed since the ignition switch was turned from OFF to ON. In addition, the gas sensor A / D value set in this manner is used in a later-described step 56 in a clean air value GSM.
It will be set as the initial value of X. Step 53
After 60 seconds have passed since the ignition switch was turned from OFF to ON, the gas sensor A / D value GSAD obtained in step 50 is compared with the clean air value GSMX indicating that the air is the cleanest. . Here, the clean air value GSMX is a value indicating that the air is the cleanest from the time when the ignition switch is turned on until the previous processing, and is stored in the rewritable RAM.

In step 54, if the determination in step 53 is YES, that is, if GSAD> GSMS, the gas sensor A / D value GSAD is compared with the limit value of the clean air value GSMX. Here, the clean air value GSMX
Is a predetermined limit value because there is a limit to the value no matter how clean the air is (maximum limit value 255). In step 55, when GSAD> limit value in step 54, the gas sensor A
It is determined that the / D value GSAD is an abnormal value, and the limit value is stored as the clean air value GSMX. Step 5
In step 6, when GSAD ≦ limit value in step 54, it is determined that the gas sensor A / D value GSAD is a normal value, and the gas sensor A / D value GSAD is set to the clean air value GS.
Stored as MX. In step 57, the gas sensor A / D value G with respect to the reference value of the clean air value GSMX
The ratio of SAD is defined as a gas sensor value (exhaust gas concentration) GSC.

In the following step 71, based on the graph-1 of the display characteristic shown in FIG. 7, the display level of the outside air contamination state is obtained in accordance with the value of the gas sensor value GSC.
In the outside air monitor section 17f on the screen of the television monitor 17 shown in Fig. 7, a process of displaying on the display sections 17b to 17e according to the degree of contamination of the outside air is performed. As shown in FIG. 7, the display level of the dirt state of the outside air is set to four levels of strong dirt / dirty / slightly dirt / fresh air, as shown in FIG. Display 17b
17e correspond to this. Therefore, the user can clearly know the state of dirt in the outside air.

In step 72, based on the graph-2 of the display characteristics shown in FIG. 8, the ratio of the intake of outside air (the opening degree of the intake door) according to the gas sensor value GSC is determined on the screen of the television monitor 17 in FIG. A process of displaying the number of arrows on the ventilation monitor unit 17g is performed. The display level of the outside air intake ratio is 1 as shown in FIG.
Four levels of 00%, 40%, 5-35%, and 0% are set, and four arrows of the ventilation monitor unit 17g in FIG. 9 are provided in accordance with the four levels. Therefore, the user can clearly know how the intake rate of the outside air is controlled according to the dirt state of the outside air, thereby clearly indicating that the intake door control is effectively executed. You can know. For example, even if the user does not smell the exhaust gas by the intake door control, the outside air is strongly contaminated, but the outside air introduction ratio is 0%. You can recognize that it is no longer needed.

In FIG. 5, steps 58 to 6
6 performs a differentiation process of the gas sensor value (exhaust gas concentration) GSC (0% to 100%) obtained in step 57, and determines the final calculation gas sensor value FGSC (0 to 0) to determine the target door opening FTI. (255 bits).

In step 58, it is determined whether the differentiation time ΔAsec has elapsed. In step 59, the previous gas sensor value OGSC and the current gas sensor value G
A GSC differential value DTGS, which is a sensor value change amount per time ΔAsec, is obtained from the difference from the SC. In step 60, it is determined whether the GSC differential value DTGS is larger than 0, that is, whether DTGS> 0.

In step 61, when the determination in step 60 is DTGS ≦ 0, that is, when the gas concentration state change is in a stable or clean direction, the GSC differential value DTGS is set to DTGS = 0. In step 62, when the determination in step 60 is DTGS> 0, that is, when the gas concentration state change is in the dirt direction, whether or not the previous GSC differential value 0 DTGS = 0, that is, when the previous gas concentration state change is It is determined whether the direction is stable or clean. In step 63, it is determined whether or not the GSC differential value DTGS, which is the current change in the gas concentration state, is equal to or greater than the differential threshold value DGC, which is the set value in the dirt direction.

In step 64, the determination in step 62 that the previous change in the gas concentration state is in the stable or clean direction and the determination in step 63 that the current GSC differential value DTGS is equal to or greater than the differential threshold value DGC. Assuming that the outside air moves in the dirt direction based on the
C = 0, that is, a value at which the intake door 1 is fully closed. In step 65, the GSC differential value DTGS
Is set to the previous GSC differential value 0DTGS. In step 66, the gas sensor value GSC is set as the calculation gas sensor value FGSC. As shown in FIG. 6, the gas sensor value for calculation FGSC is 100% indicating that the air is the cleanest, and 0% indicates that the exhaust gas concentration is the highest, that is, dirty.

[External air contamination prediction control] When the door opening / closing control is performed by the gas concentration control, if the nose of a person smells the most, such as when a single odor is generated due to the start of a preceding vehicle or a vehicle interruption, etc. If the computational gas sensor value FGSC indicating the gas concentration does not exceed the set threshold value even if the user feels the situation, the intake door 1 is not fully closed, and the response time of the door closing operation delays the exhaust gas. Will allow the car to enter the cabin.

Therefore, the differential value D of the gas sensor value GSC
It is conceivable to perform control to close the door to the REC only under the present differential value condition that TGS is a value indicating an increase in gas concentration. However, in this case, since the control is performed only with the magnitude of the differential value DTGS of this time, in a combination with a system in which noise easily enters or a gas sensor with an excessively good response, the control is frequently closed to the REC. And it becomes very annoying. In addition, as a result, the execution time for closing to the REC becomes longer, so that the control is performed with poor ventilation efficiency in the vehicle interior.

On the other hand, in the first embodiment, as shown in steps 62, 63 and 64 in FIG. 5, the previous gas concentration state change in step 62 is in the dirt direction, and When it is determined that the GSC differential value DTGS is greater than or equal to the differential threshold value DGC, it is predicted that the nose of a person will be the most smell due to the occurrence of a single odor in the future. The gas sensor value GSC is set to GSC = 0 based on the prediction of the shift to the dirt direction.
Therefore, according to the processing in step 35 of the flow shown in FIG. 3, the intake door 1 is in the inside air mode, that is, fully closed.

As described above, the current GSC differential value DTGS is limited only when the previous gas concentration state change is in the stable direction as shown in FIG. 10 (a) or in the clean direction as shown in FIG. 10 (b). The door closing control is performed according to the size of the door, so it is not necessary to frequently enter the door closing control, and while ensuring good ventilation efficiency, the door can respond with high response only when it is really necessary, such as when a single odor occurs. The closing control is performed.

[Combined control of outside air contamination prediction control and exhaust gas concentration correspondence control] When only the above-described outside air contamination prediction control is performed, a high response door closing control can be performed when a single odor is generated. Also, when the outside air is chronically at a high level and the gas concentration change is small, such as when driving in an urban area,
The intake door 1 is allowed to remain open to allow exhaust gas to enter the vehicle interior.

On the other hand, in the first embodiment, as shown in the flow chart of FIG. 3, in a gas state other than closing the intake door 1 completely by the outside air contamination prediction control, FIG.
In response to the control characteristic graph-3 shown in FIG. 3 and the calculation gas sensor value FGSC obtained in step 30, the air inlet is set to the outside air mode in the outside air clean state where the degree of outside air contamination is low, and the outside air pollution state where the degree of outside air contamination is high. In the control, the door control corresponding to the exhaust gas concentration of the intake door 1 in which the inlet is set to the inside air mode is performed. Therefore, it is possible to achieve both the high-response door closing control at the time of occurrence of a single odor and the door opening / closing control at the same time to prevent exhaust gas intrusion and secure vehicle interior ventilation during traveling.

When the target door opening shifts from fully closed to fully open during traveling, the intake door 1 is fully opened as soon as the command is issued, and the time required to remove the exhaust gas odor in the vehicle compartment by the deodorizing filter 4 is insufficient. Or the door operation is frequently performed.

Therefore, in the flowchart of FIG. 3 showing the intake door control, step 36 → step 39
When the door is opened from REC to FRE, the delay time R is set, and the intake door 1 is opened after waiting for the delay time R even if a full open command is issued. Therefore, by the delay control, it is possible to secure time until the remaining exhaust gas odor disappears, and it is also possible to eliminate the trouble of frequently operating the door.

[Regarding Window Fogging Control] If exhaust gas corresponding intake door control is performed during running while the operation for removing window fogging is being performed, window fogging will not easily disappear. . Therefore, in the flowchart of FIG. 3 showing the intake door control, as apparent from step 34, when the differential mode is selected, which can be estimated as an operation for removing fogging of the window, the intake door control corresponding to the exhaust gas is not performed.
This makes it possible to incorporate the window fogging control into the exhaust gas corresponding intake door control.

In the automatic air-conditioning control, when the load is high (heat) such as the cool-down control, the control is shifted to the control (normal control) in which the automatic air-conditioning control is prioritized even if the air is clean (step 33). ).

(Other Embodiments) In the first embodiment, a television monitor 17 for an existing navigation system is used as a display device, which allows a display device for controlling an intake door to be separately installed. Although it was possible to reduce the cost in comparison, it goes without saying that a display device for the intake door control display may be separately installed, in this case, using a light emitting diode or the like other than the television monitor Alternatively, the status may be displayed by turning on / off each display unit. In the first embodiment, an example is shown in which the threshold values TH1 to TH3 for determining the intake door opening degree by correlating graph-3 of the control characteristic of FIG. 6 with the odor intensity based on the actual vehicle measurement are described. The setting of these threshold values TH1 to TH3 is arbitrary. Further, in the graph-3, the target door opening is configured to be steplessly controlled between the first threshold value TH1 and the second threshold value TH2. The intermediate opening mode may be set between the second threshold value TH2 and the third threshold value TH3, but the intermediate opening mode portion is replaced with the variable opening mode. The intermediate opening mode may be omitted by including it in the region or in the region of the outside air mode. Embodiment 1
Then, in the control using the control characteristic graph-3,
An example is shown in which the control of higher quality can be executed by combining the outside air contamination prediction control based on the gas concentration differential value, but the desired effect can be obtained even if the control does not combine the outside air contamination prediction control. . In the first embodiment,
Although the example in which the gas sensor value GSC based on the clean air value GSMX is used as the gas concentration calculation value has been described, the value obtained by A / D conversion of the measurement value from the exhaust gas sensor is used as the gas concentration calculation value. Is also good.

[0043]

According to the first aspect of the present invention, based on the exhaust gas concentration obtained by the exhaust gas concentration calculating means, an outside air mode is set in an outside air clean state where the exhaust gas concentration is low, and an outside air pollution state where the exhaust gas concentration is high. In the intake door control device provided with intake switching control means for controlling the drive of the intake door actuator to set the inside air mode, the display means configured to be able to display the dirt state of the outside air and the exhaust gas concentration calculation means are used. Since the display control means for controlling the display means to display the dirt state of the outside air based on the exhaust gas concentration provided is provided, the user can know the dirt state of the outside air by the display of the display means, Therefore, since the user does not smell the polluted air such as exhaust gas even when the outside air is dirty, the intake door control device Effect it is possible to know the due.

According to the second aspect of the present invention, in the first aspect,
In the intake door control device described above, the display means e is configured to be capable of displaying the outside air introduction state in addition to the outside air contamination state, and the display control means f is configured to display the outside air contamination state by the display means e. Since the control for displaying the outside air introduction state is performed in addition to the control, the user can clearly know how the intake door a is controlled according to the outside air contamination state.

According to the third aspect of the present invention, there is provided the second aspect.
In the intake door control device described above, the display means e includes an outside air monitor unit that displays dirt on the outside air in a plurality of stages, and a ventilation monitor unit that displays the outside air introduction state in a plurality of stages according to the introduction ratio of the outside air. With this arrangement, it is possible to more clearly know how the intake door a is controlled according to the state of contamination of the outside air.

According to the fourth aspect of the present invention, there is provided the first aspect.
In the intake door control device according to any one of (3) to (3), since the display means e is constituted by a television monitor, vehicles equipped with a television monitor, such as vehicles equipped with a navigation system, have increased in recent years. Since the existing television monitor can be used in the vehicle, the cost of the device can be reduced.

According to the fifth aspect of the present invention, the first aspect is provided.
In the intake door control device according to any one of (3) to (3), since the display means e is configured by a display device such as an LED or a liquid crystal, the display means e can be installed in a vehicle having no television monitor at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to a claim showing an intake door control device of the present invention.

FIG. 2 is an overall system diagram showing an intake door control device according to the first embodiment.

FIG. 3 is a flowchart illustrating a flow of an intake door control operation performed by the signal processing circuit according to the first embodiment;

FIG. 4 is a flowchart illustrating a flow of a gas sensor value process and a display process performed by the signal processing circuit according to the first embodiment;

FIG. 5 is a flowchart showing a flow of gas sensor value processing (differential processing) performed by the signal processing circuit of the first embodiment.

FIG. 6 is a graph showing control characteristics used in the exhaust gas concentration-dependent door control performed by the signal processing circuit according to the first embodiment;
3 (target door opening characteristic diagram).

FIG. 7 is a graph-1 (dirt display level characteristic diagram) of a display level used in display control performed by the signal processing circuit of the first embodiment.

FIG. 8 is a graph-2 (external air introduction rate display level characteristic diagram) of a display level used in display control performed by the signal processing circuit of the first embodiment.

FIG. 9 is a diagram showing a display of a control state of intake door control on the television monitor of the first embodiment.

FIG. 10 is a diagram showing a gas concentration differential value change pattern in which control for completely closing the intake door is executed in the outside air contamination prediction control according to the first embodiment.

[Explanation of symbols]

 a intake door b exhaust gas sensor c exhaust gas concentration calculation means d suction switching control means e display means f display control means g intake door actuator 1 intake door 2 outside air suction port 3 inside air suction port 4 deodorizing filter 5 blower 6 blower motor 7 servo motor Reference Signs List 8 exhaust gas sensor 9 door position sensor 10 vehicle speed sensor 11 outside temperature sensor 12 air conditioner / control unit 13 signal processing circuit 14 blower air volume signal 15 compressor signal 16 mode signal 17 television monitor 17a clean monitor section 17b strong dirt display section 17c medium dirt display Unit 17d Small dirt display unit 17e Clean dirt display unit 17f Outside air monitor unit 17g Ventilation monitor unit

Claims (5)

[Claims] 1. An intake door provided at a suction port of an air conditioner unit mounted on a vehicle and switched between an outside air mode and an inside air mode by an intake door actuator, an exhaust gas sensor installed in a vehicle and detecting an exhaust gas concentration of the outside air. An exhaust gas concentration calculating means for inputting a sensor signal from the exhaust gas sensor and calculating an exhaust gas concentration based on the sensor signal; and an exhaust gas concentration based on the exhaust gas concentration obtained by the exhaust gas concentration calculating means. An intake switching control means for controlling the drive of an intake door actuator so as to be in an outside air mode when the concentration of the outside air is low and to be in an inside air mode when the concentration of the exhaust gas is high. Display means configured to be able to display a state of contamination of outside air, and the exhaust gas concentration Intake door control device, wherein a display control means for performing control to display the outside air contamination state is provided by the display means based on the exhaust gas concentration obtained by the calculation means. 2. The display device is configured to be able to display an outside air introduction state in addition to an outside air contamination state.
2. The intake door control device according to claim 1, wherein the display control means is configured to perform control for displaying the outside air introduction state in addition to control for displaying the outside air contamination state on the display means. 3. The display means is provided with an outside air monitor unit for displaying dirt on the outside air in a plurality of stages, and a ventilation monitor unit for displaying the outside air introduction state in a plurality of stages according to the introduction ratio of the outside air. 3. The intake door control device according to claim 2, wherein 4. The intake door control device according to claim 1, wherein said display means is a television monitor. 5. The intake door control device according to claim 1, wherein said display means is a display device such as an LED or a liquid crystal.