KR20080107813A - Method for detecting error of automatic temperature controller of car - Google Patents

Abstract

A method for diagnosing an automatic vehicle temperature controller is provided to discriminate the malfunction of an automatic temperature controller via a serial data communication network connected to various controllers of a vehicle without using any additional diagnosing equipment. An automatic temperature controller is set in a malfunction diagnosing mode by setting a predetermined combination of setting modes such as set temperature, wind volume, wind direction and room/atmospheric air modes(S10). The automatic temperature controller carries out malfunction diagnosing if two or more control switches of the automatic temperature controller are pressed simultaneously(S20). Operation states of various sensors and an actuator connected to the automatic temperature controller are checked(S30). As malfunction is diagnosed in the third step, a malfunction diagnosing code is output to a display unit(S40).

Description

Fault diagnosis method for automobile thermostat {METHOD FOR DETECTING ERROR OF AUTOMATIC TEMPERATURE CONTROLLER OF CAR}

1 is a block diagram showing the configuration of a serial data communication network formed in an automobile;

Figure 2 is a flow chart showing a first embodiment of a thermostatic failure diagnosis method for a vehicle according to the present invention,

3A to 5B are diagrams illustrating embodiments of an output screen when a fault diagnosis is performed according to the present invention.

6 is a block diagram showing the connection of the apparatus according to the second embodiment of the failure diagnosis method for a thermostat for a vehicle according to the present invention;

7 is a flowchart illustrating a second embodiment of a failure diagnosis method for a thermostat for an automobile according to the present invention.

The present invention relates to a method for diagnosing a failure of an automatic thermostat for an automobile, and in particular, outputs a diagnosis of a failure and outputs a failure by using an existing switch and display device without a separate diagnostic device, or a failure of the thermostat with a simple diagnostic device It is about how to diagnose.

In general, the thermostat is equipped with a sensor that can detect a variety of temperatures, insolation, cooling water, etc. according to the temperature set by the user, and automatically adjusts the temperature inside the vehicle to match the temperature desired by the user with the sensor detected value It is made to be adjusted.

In general, a thermostat for a vehicle (controller) is connected to a variety of input sensors such as bet, air sensor, solar radiation sensor, and air conditioning module such as temperature actuator (driver), mode actuator.

Conventionally, an auto thermostat for a vehicle in a vehicle that does not support a serial data communication network supports a function of detecting whether an air conditioning module and an input sensor are normally operated for effective control, but as a serial data communication network is applied to a vehicle, Without diagnostic equipment, there is no support for detecting when a failure occurs.

In addition, although serial data communication networks have many advantages as they are applied to vehicles, communication problems still remain. Although there is a separate diagnostic device for determining whether various sensors and actuators are out of order and whether communication is normal, there is a problem in that it is expensive and does not have a function for checking a specific communication signal.

The present invention has been made to solve the above problems of the prior art, using a serial data communication network connected to the various controllers of the vehicle without a separate diagnostic equipment to determine whether the thermostat failure or automatic temperature diagnosis for failure diagnosis It is an object of the present invention to provide a method for diagnosing a failure of a thermostat for a vehicle using a regulating device and a display device.

In order to solve the above problems, a method for diagnosing a failure of a thermostat for a vehicle according to the present invention is a method for diagnosing a failure of a thermostat for a vehicle equipped with a serial data communication network. Step of setting the thermostat to a failure diagnosis mode by setting a setting mode such as a predetermined combination, and pressing the control switch of at least two thermostats at the same time, the thermostat fails. A second step of performing the diagnosis, a third step of checking the operating states of various sensors and actuators connected to the thermostat by the controller of the thermostat, and a failure diagnosis code when the fault is diagnosed in the third step The fourth step of outputting to the display device is made.

In addition, another method for diagnosing failure of a thermostat for a vehicle according to the present invention includes a first thermostat, a first display device, and a troubleshooting connector connected to the two devices and including a battery pin. A method for diagnosing a failure of a thermostat for an automobile in which a serial data communication network is formed between devices, the first step of inspecting that a serial data communication network connected to the first thermostat operates normally, in the first step. A second step of connecting a second thermostat to the troubleshooting connector and checking whether the second thermostat operates normally when the network abnormality is found, and the first thermostat if the second thermostat is normal. Replace the thermostat and the second thermostat to adjust the first thermostat. It comprises a third step of checking if the device is operating properly.

Here, the first step is a first process of supplying power to the first thermostat and the first display device by turning on the ignition switch of the vehicle, the first display according to the operation of the first thermostat device A second process of checking whether the display of the device is normally performed and a third process of checking whether the actuator of the air conditioning module operates normally according to the operation of the first thermostat when the display of the first display device is not normal. It is made to include.

In addition, the second step is a first process of turning off the ignition switch of the vehicle to cut off the power supplied to the first thermostat and the first display device, the second thermostat for diagnosing the failure connector And a second process of connecting the second display device, a third process of supplying power to the second thermostat device and the second display device through battery pins included in the troubleshooting connector, and the second automatic temperature control. And a fourth process of checking whether the display of the second display apparatus is normally performed according to the operation of the apparatus.

In addition, the third step is a first process of shutting off the power supplied to the second thermostat and the second display device by a battery pin included in the troubleshooting connector, the first thermostat and the A second process of exchanging a second thermostat with each other, a third process of supplying power to the first thermostat and the second display apparatus through battery pins included in the troubleshooting connector, and the first automatic And a fourth process of checking whether the display of the second display device is normally performed according to the operation of the temperature controller.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Hereinafter, in the present invention, the thermostat may be used interchangeably to refer to a controller of the thermostat.

1 is a block diagram showing the configuration of a serial data communication network formed in a vehicle, Figure 2 is a flow chart showing a first embodiment of a thermostat failure diagnosis method for a vehicle according to the present invention.

Referring to Figure 1, look at the serial data communication network formed in the vehicle as follows.

The thermostat 10, the controller receives data through various sensors for measuring the temperature inside and outside the vehicle, and accordingly outputs a control signal to the air conditioning module to adjust the temperature to the set temperature.

Changes in various states of the vehicle, which are changed according to the operation of the air conditioning module, are output to the display apparatus 20, and the thermostat 10 and the display apparatus 20 are connected to a serial data communication network and connected to each other. Send and receive.

In addition, the gateway 30 that controls the communication between the devices is also connected to the serial data communication network.

In addition, various other controllers are connected to the serial data communication network to transmit and receive data with each other, and communication between similar controllers is more efficient through any one controller. In this case, the controller that controls the communication is the gateway 30. Becomes

Referring to Figure 2 will be described a first embodiment of a failure diagnosis method for a vehicle thermostat according to the present invention.

In a first embodiment of a failure diagnosis method for a vehicle thermostat according to the present invention, first, the set temperature, the air volume, and the wind direction are set in a predetermined combination to set the thermostat as a failure diagnosis mode (S10).

In order to perform the troubleshooting, the user has to give the thermostat a command to perform the troubleshooting, which is implemented in the form of receiving input of a predetermined key (or switch) from the user.

However, in the present invention, since a separate troubleshooting switch is not required, a failure diagnosis command should be given using a conventional basic setting switch.

However, in general, a malfunction may occur when a user directly inputs a predetermined key (or switch) in a normal mode in which a user may input a temperature or a wind direction using a thermostat.

If, for example, two of the control switches installed in the vehicle are pressed at the same time, if it is configured to perform a failure diagnosis, the user may accidentally operate the control switch to adjust the temperature or the wind direction. Even when the control switch is pressed at the same time, there is a problem that a failure diagnosis can be performed.

Therefore, in order to prevent such a malfunction, it is necessary to first set the failure diagnosis mode before receiving a command key to perform the failure diagnosis from the user.

The setting of the failure diagnosis mode may be performed by the automatic temperature controller recognizing the setting temperature, the air flow rate, the wind direction, and the like in a mode that is not preferred by the user.

For example, if the temperature is set to Hi, the air volume is set from OFF to STEP 1, and then to OFF, and the wind direction is set to the glass window and the outside and outside, the thermostat Is set to the troubleshooting mode.

Next, after setting to the failure diagnosis mode, if at least two or more control switches of the control switch of the thermostat are pressed at the same time, the thermostat performs a diagnosis of the failure (S20).

It is possible to determine which key (or switch) to perform when troubleshooting is made in a variety of ways.

For example, two of the adjacent control switches may be specified, two control switches that are not used well at the same time, or three or more switches may be specified.

Next, when the user is commanded to perform the failure diagnosis, the controller of the thermostat checks the operation state of the various sensors and actuators connected to the thermostat (S30). This operation state can be determined by checking whether data communication between each sensor and actuator is performed properly, or by checking whether an abnormal signal is detected.

That is, the controller of the thermostat determines whether there is a failure by checking whether communication through the various sensors and actuators and the serial data communication network is normally performed.

If the fault is diagnosed by checking the operation state, the fault diagnosis code is output to the display device (S40).

The controller of the display device receives a command of the thermostat (controller) and outputs a fault diagnosis code to the display screen.

Rather than having a separate display device, a failure diagnosis code must be output on a conventional basic display screen.

Here, the fault diagnosis code may be represented as 'ERR', 'ERR #', etc. in one embodiment, and when there is no fault, 'NONE', 'OK', 'ERR 0', etc. may be expressed. Can be. Here, when the failure diagnosis code is displayed as 'ERR #', the number of the device determined as the failure is outputted in #.

In addition, the fault diagnosis code of the sensor may be output to the set temperature output portion of the display device, and the fault diagnosis code of the actuator may be output to the outside temperature output portion.

3A to 5B are diagrams illustrating embodiments of an output screen when a failure diagnosis is performed according to the present invention.

Basically, in the case of outputting the fault diagnosis code, in order to distinguish it from the existing output state, the fault diagnosis code is output after erasing all output graphics in one embodiment.

First, referring to FIGS. 3A and 3B, when the basic output screen of the display device is the same as that of FIG. 3A, only the button corresponding to the device for which the failure is diagnosed is output as shown in FIG. 3B.

In Figure 3a, SET TEMP is set temperature, OUTSIDE is outside temperature, AIO is fresh air inflow, AIR is air circulation, AUTO is auto setting, ACN is air condition setting, BLR is air flow setting, STEP is air flow 1 ~ 7, AOV is face direction By wind blowing, AOVH blows toward the face and feet, AOH blows toward the feet, AODH blows toward the windshield and feet, and AOD blows toward the windshield.

Therefore, as shown in FIG. 3B, when the blower controlling the air volume setting and the air volume is broken, the display device controller outputs only BLR and STEP and erases the remaining graphic screen.

As another output example, referring to FIGS. 4A and 4B, when a state 41 to 48 of a vehicle related to a thermostat is displayed as shown in FIG. 4A, a failure diagnosis code is displayed in a portion 46 indicating a set temperature. To be printed.

As shown in FIG. 4B, only the set temperature display portion 46 is outputted while the other graphic screen is erased, and a fault diagnosis code indicating whether there is a fault is output to the set temperature display portion 46.

5a to 5b is a diagram showing a failure diagnosis code in a vehicle having a multi-zone air conditioning module.

5A to 5B, in the case of a multi-zone air conditioning module, a failure diagnosis code may be output to portions 51 and 54 displaying the set temperatures of each air conditioning module.

In the case where the multi-zone air conditioning module is provided, the display screen generally displays the set temperature for each zone (51-driver's seat, 54-passenger seat), the date and day display part 52, and the time part 53. There is this.

In each of the output examples shown in Figs. 3A to 5B, the fault diagnosis code may be configured to blink for easy recognition when the fault diagnosis code is output.

Figure 6 is a block diagram showing the connection of the apparatus according to the second embodiment of the method for diagnosing a failure of the thermostat for a vehicle according to the present invention, Figure 7 is a failure diagnosis of the thermostat for a vehicle according to the invention A second embodiment of the method is a flowchart shown.

Referring to FIG. 6, a second embodiment of a method for diagnosing a failure of a thermostat device for a vehicle according to the present invention includes a separate configuration having the same configuration as the thermostat device 10 and the display device 20 provided in a vehicle. The failure diagnosis thermostat 40 and the display device 40 are connected to the failure diagnosis connector 60 provided in the vehicle to diagnose whether the first thermostat 10 has failed.

In the second embodiment of the present invention, for convenience of description, the thermostat and the display device provided in the vehicle are referred to as the first thermostat device 10 and the first display device 20, and the thermostat device for fault diagnosis and The display device is referred to as the second thermostat 40 and the second display device 50.

In addition, the troubleshooting connector 60 includes a plurality of communication pins for communication and battery pins for power supply.

The first thermostat 10 and the first display device 20 are supplied with power by the ignition power of the vehicle, and the second thermostat 40 and the first display device 50 have a fault diagnosis connector. The power is supplied via the battery pin of 60.

In this case, a separate switch may be further provided to facilitate supply or interruption of power of the battery pin.

Each of these devices forms a network to enable serial data communication.

The second embodiment of the present invention is largely divided into three steps.

According to a second embodiment of a method for diagnosing a failure of a thermostat for an automobile according to the present invention, a first step (S110 ˜ 130) of checking a normal operation of a serial data communication network connected to the first thermostat may be performed. If a network abnormality is found in the step 2nd step (S140 ~ 170), the second thermostat for connecting the second thermostat to the troubleshooting connector and checks whether the second thermostat operates normally. If is normal, and the third step (S180 ~ S230) for checking whether the first thermostat is operating normally by replacing the first thermostat and the second thermostat.

Referring to FIG. 7, a second embodiment of a method for diagnosing failure of a thermostat for an automobile according to the present invention will be described in detail.

First, the ignition switch of the vehicle is turned on to supply power to the first thermostat 10 and the first display device 20 (S110).

Next, it is checked whether the display of the first display device 20 is normally performed according to the operation of the first thermostat 10 (S120).

Here, when the display of the first display device 20 is not normal, it is checked whether the actuator of the air conditioning module operates normally according to the operation of the first thermostat 10 (S130).

If the display of the first display device 20 is normally performed according to the operation of the first thermostat 10, the first thermostat 10 determines that the display is normal (S121).

Next, the ignition switch of the vehicle is turned off to cut off the power supplied to the first thermostat 10 and the first display device 20 (S140).

The second thermostat 40 for diagnosing the second display device 50 is connected to the troubleshooting connector 60 (S150).

Power is supplied to the second thermostat 40 and the second display device 50 through the battery pin included in the troubleshooting connector 60 (S160). In the following steps, the equipment is driven by the power supplied through the battery pin of the troubleshooting connector without applying power through the ignition power inside the vehicle.

In operation S170, the display of the second display apparatus 50 is normally performed according to the operation of the second thermostat 40.

If the display of the second display device 50 does not normally change according to the operation of the second thermostat 40, the display is replaced with a new second thermostat and the second display device (S171). Repeat the process S150 to S170.

Next, the power supplied to the second thermostat 40 and the second display device 50 is cut off by the battery pin included in the troubleshooting connector 60 (S180).

The first thermostat 10 and the second thermostat 40 are installed interchangeably (S190). If so, the first thermostat 10 and the second thermostat 40 are connected to the troubleshooting connector 10.

Next, power is supplied to the first thermostat device 10 and the second display device 50 through battery pins included in the failure diagnosis connector 60 (S200).

In operation S210, it is determined whether the display change of the second display apparatus 50 is normally performed according to the operation of the first thermostat 10.

If the display change is not normal, it is determined that the first thermostat 10 is out of order and outputs a failure diagnosis code (S211).

If the display of the second display device 50 is normally changed by the operation of the first thermostat 10, it is determined that the first thermostat 10 is normal (S220), and the serial data communication network Determining that there is an error in another controller connected to. In this case, another controller is checked (S230).

The thermostatic fault diagnosis method for an automobile according to the present invention may be configured to perform a fault diagnosis according to the second embodiment and output the fault diagnosis code by the output method according to the first embodiment.

As described above, the method for diagnosing a failure of the thermostat for a vehicle according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, but the scope of the technical idea is protected. It can be applied in

The thermostat for a vehicle thermostat according to the present invention configured as described above is a failure diagnosis by determining the failure of the thermostat using a serial data communication network connected to the various controllers of the vehicle without a separate diagnostic equipment Simple and cost-free, even when measuring using diagnostic equipment, only simple diagnostic equipment such as thermostats and display devices for fault diagnosis can be connected to the fault diagnosis connector to perform fault diagnosis without expensive diagnostic equipment. There is an effect that can determine whether the thermostat failure.

Claims (14)

In the failure diagnosis method of a thermostat for a vehicle equipped with a serial data communication network, A first step of setting the thermostat as a failure diagnosis mode by setting setting modes such as set temperature, air volume, wind direction, indoor and outdoor air in a predetermined combination; A second step of causing the thermostat to perform a fault diagnosis when simultaneously pressing at least two control switches of the thermostat; A third step of checking, by the controller of the thermostat, operating states of various sensors and actuators connected to the thermostat; And And a fourth step of outputting a failure diagnosis code to the display device when the failure is diagnosed in the third step. The method according to claim 1, The third step is a failure diagnosis method for a vehicle thermostat, characterized in that the controller checks that the communication through the serial data communication network with the various sensors and actuators. The method according to claim 1, In the fourth step, when the display device displays the fault diagnosis code, the automatic temperature controller fault diagnosis method for automobiles, characterized in that first outputting a fault diagnosis code after turning off all graphics. The method according to claim 3, In the fourth step, when the display device displays a fault diagnosis code, the thermostat for a vehicle thermostat device for displaying a fault diagnosis code on a set temperature display unit and an outside air temperature display unit. The method according to claim 4, And the fourth step outputs a failure diagnosis code of the sensor to the set temperature output part, and outputs a failure diagnosis code of the actuator to the outside temperature output part. The method according to claim 3, In the fourth step, when the thermostat includes a multi-zone air conditioning module, the thermostat for a vehicle, characterized in that to output a failure diagnosis code on the set temperature display portion of each zone. A method for diagnosing a vehicle thermostat comprising a first thermostat, a first display device, and a troubleshooting connector connected to the two devices and including a battery pin, wherein a serial data communication network is formed between the devices. To A first step of inspecting a normal operation of a serial data communication network connected to the first thermostat; A second step of connecting a second thermostat to the fault diagnosis connector and checking whether the second thermostat operates normally when a network abnormality is found in the first step; And And a third step of checking whether the first thermostat operates normally by replacing the first thermostat and the second thermostat when the second thermostat is normal. Failure diagnosis method of thermostat for automobile. The method according to claim 7, The first step may include a first process of supplying power to the first thermostat and the first display device by turning on the ignition switch of the vehicle; A second step of checking whether the display of the first display device is normally performed according to an operation of the first thermostat; And And a third process of checking whether the actuator of the air conditioning module operates normally according to the operation of the first thermostat when the display of the first display device is not normal. Troubleshooting method. The method according to claim 8, The first step is characterized in that the automatic thermostat fault diagnosis method for a vehicle, characterized in that for determining that there is an error in the serial data communication network when the actuator of the air conditioning module does not operate normally. The method according to claim 7, The second step may include a first process of turning off the ignition switch of the vehicle to cut off power supplied to the first thermostat and the first display device; A second process of connecting the second thermostat and the second display device for diagnosis to the troubleshooting connector; A third process of supplying power to the second thermostat and the second display device through battery pins included in the troubleshooting connector; And And a fourth process of checking whether the display of the second display device is normally performed according to the operation of the second thermostat. The method according to claim 10, In the second step, when the fourth process does not operate normally, the second thermostat for the vehicle may be replaced with a new second thermostat and a second display device. Diagnostic method. The method according to claim 7, The third step may include a first step of cutting off power supplied to the second thermostat and the second display device by battery pins included in the troubleshooting connector; A second process of swapping the first thermostat and the second thermostat; A third process of supplying power to the first thermostat and the second display device through battery pins included in the troubleshooting connector; And And a fourth process of checking whether the display of the second display device is normally performed according to the operation of the first thermostat. The method according to claim 12, In the third step, when the display of the second display device is normally changed by the operation of the first thermostat, the first thermostat is determined to be normal, and the other controller connected to the serial data communication network is examined. The thermostat failure diagnosis method for a vehicle, characterized in that further comprising a fifth process. The method according to claim 7, The malfunction diagnosis method for a vehicle thermostat, characterized in that the switch is further provided with a switch for turning on / off the power supply of the battery pin.

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