KR100401616B1 - Method for controlling immobilizer during engine running for a vehicle - Google Patents

Abstract

In an immobilizer control of a vehicle, in a state in which the engine is started in the vehicle equipped with the ICU, the electronic control means enters the ICU mode according to a signal applied from the connected diagnostic scan tool; When the entry of the ICU sub-mode is required from the diagnostic scan tool while the electronic control means enters the ICU mode, the electronic control means determines whether an item of the requested ICU sub-mode is accessible; If it is possible to enter the ICU sub-mode, the electronic control means displays the current data among the items of the ICU mode, and performs the sub-mode of the selected item and transmits the result to the diagnostic scanning tool; If it is not possible to enter the ICU sub-mode, the electronic control means transmits a specific message indicating that the item of the requested ICU sub-mode cannot be entered to the diagnostic scan tool while the engine is running and recognizes the message. Inducing an engine to stop by; If the ignition key is turned on after engine start is stopped in response to a specific message that induces engine start stop by the diagnostic scan tool, the electronic control unit performs the ICU sub-mode of the selected item and displays the result to the diagnostic scan tool. It comprises the step of.

Description

How to control an immobilizer when the engine of a car is running {METHOD FOR CONTROLLING IMMOBILIZER DURING ENGINE RUNNING FOR A VEHICLE}

The present invention relates to an immobilizer control method when an engine of a vehicle is operated. More particularly, when the ECU (Electronic Control Unit) of the vehicle enters the ICU (Immobilizer Control Unit) mode, the engine is stopped and associated with the ICU mode. The present invention relates to a method for controlling an immobilizer during engine operation of a vehicle so that information can be checked even during engine operation.

In general, the ECU receives a signal detected by a plurality of sensing means in the vehicle, recognizes a driving condition, and performs engine control based on the recognized driving condition. In addition, the ECU diagnoses a detection signal of each sensing means and forms a diagnostic code indicating whether the corresponding sensing means is in error.

The vehicle is also equipped with an ICU that links with the functions of these ECUs.

When the ignition key is inserted, the ICU checks the encryption code read from the key to determine whether or not it matches the set encryption code, and permits the engine to start if it is matched and the anti-theft function if the encryption code does not match. Is activated to perform the function of preventing the engine from starting.

As shown in FIG. 1, the ICU reads the encryption code set in the starter key 21 when the ECU 24 and the starter key 21 are inserted, and matches the encryption code set for performing the immobilizer function. A key bundle 22 for detecting whether the ignition key is appropriate by detecting whether the ignition key is appropriate, an interface unit 23 for decoding the signals exchanged between the key bundle 22 and the ECU 24, and providing an interface; When the signal detected by each sensor is transmitted to the ECU 24 and the encryption code read from the ignition key 21 to be inserted is determined to be normal, according to the actuator driving signal applied from the ECU 24. It includes the engine 25 is turned on.

In the above-described starter key 21, the EEPROM (Electrically Erasable and Programmable ROM) is embedded, and a unique encryption code is set in the EEPROM and provides information on whether startup is possible at startup by the encryption code.

The interface unit 23 decodes the data transmitted when the data is transmitted and received at normal startup between the ECU 24 and the key bundle 22.

A portable and external diagnostic device provided by a maintenance shop or an auto body manufacturing company to check an operation state diagnosis or a diagnostic code of the ECU 24 includes the HI-SCAN 26 connected through a connector (not shown). It can be connected to the ECU 24. This HI-SCAN 26 is used for key learning upon registration of an unlearned key.

Therefore, when the ignition key 21 is inserted into the key bundle 22, the immobilizer function process included in the key bundle 22 reads the encryption code from the ignition key 21 and then conforms to the suitability of the ignition key 21. Thus, if it is determined that the ignition key 21 is suitable, the engine is allowed to be started. If the suitability of the ignition key 21 is not confirmed, the engine is not started. At this time, the interface unit 23 is used. Decodes a signal indicating whether or not the start key 21 is suitable for delivery to the ECU (24). The ECU 24 then determines whether to activate the immobilizer function.

An operation relationship thereof is shown in FIG. 2. According to FIG. 2, an ECU 24 is connected to a diagnostic apparatus HI-SCAN 26 through a connector in order to check information related to the ICU while the engine is maintained on. ), When the entry to the ICU mode is requested, the ECU 24 forcibly stops the start of the engine because the entry of the ICU mode is impossible when the engine keeps starting on (ST11-ST13). .

Thus, when the engine is stopped by the ECU 24, it is impossible to enter the ICU mode. Therefore, when the operator selects the ignition key as an on contact for entering the ICU mode (ST14), the ECU 24 ) Enters the submenu and performs ICU submenu items such as neutral / user password input / lymph home / key learning / present data display and displays the execution result of the corresponding submenu (ST15-ST16).

As described above, when entering the ICU mode in the engine start-up state, the ECU 24 may change the ICU mode-related data on the electrically erasable and programmable ROM (EEPROM), and stop the engine to secure the system. That is, when the engine enters the ICU mode while the engine is in operation, an engine stall occurs.

As such, the ECU 24 stops the engine upon entering the ICU mode by connecting the HI-SCAN 26 to input the user password related to the ICU mode, to learn the ignition key, to set the lymph home mode, to neutralize and You will perform a series of tasks, such as displaying the current data.

However, the related art described above has a problem in that the driver's safety cannot be secured due to an engine stop when entering the ICU mode with the HI-SCAN 26 during engine operation.

For this reason, there is a limit in that ICU related information such as the initial state of the ICU, the learned state, and the learned key quantity cannot be confirmed in the state in which the engine is operating.

In addition, since there is not enough information provided to the mechanic during maintenance of the engine in the ICU applied vehicle, there is a problem that confusion and inconvenience caused by the absence of information.

The present invention was created to solve the above-mentioned conventional problems, and an object of the present invention is to prevent the engine stop when the ECU of the vehicle enters the ICU mode and to check the information related to the ICU mode during the engine operation. To provide an immobilizer control method for the operation of the engine of the car to ensure that.

1 is a block diagram of a general ICU system.

Figure 2 is a flow chart of an immobilizer control method during engine operation according to the prior art.

3 is a flowchart of a method for controlling an immobilizer during engine operation of a vehicle according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

21: ignition key 22: key bundle

23: interface unit 24: ECU

25: engine 26: HI-SCAN

In order to achieve the above object, the present invention includes the steps of entering the ICU mode according to a signal applied from a diagnostic scan tool connected to the electronic control means in a state where the engine is started in a vehicle equipped with ICU; When the electronic control means enters the ICU sub-mode from the diagnostic scan tool when the electronic control means enters the ICU mode, the electronic control means determines whether an item of the requested ICU sub-mode is accessible; If it is possible to enter the ICU sub-mode, the electronic control means displays the current data among the items of the ICU mode, performs the sub-mode of the selected item, and transmits and displays the result to the diagnostic scanning tool; If it is not possible to enter the ICU sub-mode, the electronic control means transmits and displays a specific message to the diagnostic scan tool indicating that the item of the requested ICU sub-mode cannot be entered while the engine is in operation. Inducing an engine stop by an operator recognizing the message; If the ignition key is turned on after engine start is stopped in response to a specific message that induces engine start stop by the diagnostic scan tool, the electronic control means performs the ICU sub-mode of the selected item and converts the result to the diagnostic scan tool. It provides a method for controlling the immobilizer during the operation of the engine of the vehicle, characterized in that it comprises a transfer display.

Best Mode for Carrying Out the Invention Preferred embodiments according to the present invention will now be described with reference to the accompanying drawings. Since the ICU applied to the vehicle is generally made of the configuration of Fig. 1 mentioned in the prior art, an immobilizer control method during operation of the engine according to the present invention. In the above, the configuration mentioned in the related art is also applied, and the configuration and reference numerals shown in FIG. 1 are referred to as they are. FIG. .

According to Fig. 3, when the operator keeps the engine on and the operator connects the HI-SCAN 26 to the ECU 24 through the connection of the connector to check the ICU related information, the ECU 24 starts the engine. It enters ICU mode without control of stop (ST21 ~ ST22).

In the case of entering the ICU mode, the engine stall is generated in the existing ICU-applied vehicle. However, in the present invention, when the ICU information such as the number of registration keys, the state of the ECU 24, and the state of the keys is required, the engine stall is generated. The ICU information is provided to the requestor regardless of whether it is currently running.

The information of the illustrated ICU is not stored directly in the EEPROM of the ECU 24, but corresponds to displaying only the information on the RAM of the ECU 24. Therefore, the provision of ICU information is not a factor that destabilizes the ICU system.

As described above, when the ECU 24 enters the ICU mode and requests the entry of the ICU sub mode to the HI-SCAN 26 (ST23), the ECU 24 determines that the item of the required ICU sub menu is in the sub mode. In operation ST24, it is determined whether the entry of the selected submenu is an entry capable of entering the sub mode, and the ECU 24 selects the current data from the ICU menu. Displayed on the monitor of the SCAN 26 (ST25), the ECU 24 performs the required ICU submenu in the state where the engine start-up is maintained (ST28) and transmits the result of the work performed to the HI-SCAN 26. On the other hand, since the ICU related data on the EEPROM in the ECU 24 is read / written in the judgment of the ST24, the user password input, lymph groove, key setting, etc., which seriously affect the vehicle and engine are displayed. If it is determined that the item is selected, the ECU 24 causes the vehicle and engine to malfunction. It has a serious effect, and the driver or operator can be exposed to danger by sudden engine stop, so the operator can start the engine by displaying as possible to work on the selected item after stopping the engine on the monitor of HI-SCAN 26. Induces a stop (ST26).

In order to enable the determination of the step ST24, the ECU 24 does not infringe the stability of the ICU system regardless of whether the engine is operating and the items of the ICU sub-mode that may cause the instability of the ICU system in the engine operating condition. The identification criteria for the items in the submode shall be retained.

Preferably, the ICU information display mode such as the registration key quantity, the state of the ECU 24 and the key state as exemplified above by the identification criterion is set to a sub-mode which can be entered even under the condition that the engine operates.

In addition, ICU submenu items such as Neutral, User Password Input, Lymph Groove, Key Learning, etc. are set to a sub mode that can be operated only after the engine is stopped for safety of the engine.

As the above operation is possible only after the engine stops, the message displayed on the monitor of the HI-SCAN 26 that induces the engine stop is displayed as, for example, 'The engine is in operation. do.

Therefore, when the operator recognizes the message displayed on the HI-SCAN 26 monitor, stops the engine starting, and places the ignition key on to perform the requested ICU mode (ST27), the ECU 24 responds to the corresponding message. Perform ICU submenu (ST28).

Subsequently, the ECU 24 transmits the result of performing the corresponding ICU submenu to the HI-SCAN 26 and displays the result on the monitor so that the operator can recognize the result of the ICU mode (ST29).

According to the method for controlling an immobilizer when operating an engine of a vehicle of the present invention described above, a safety message for a mechanic and a driver is ensured by displaying a message for inducing an engine stop instead of abruptly stopping the engine when entering the ICU mode using the HI-SCAN during engine operation. There is an effect that can be done.

In addition, the ICU-related information can be checked even while the engine is running, so that the convenience of maintenance of the ICU-applied vehicle and the maintenance time when the problem is found can be shortened.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the following claims.

Claims (3)

(a) the electronic control means entering the ICU mode according to a signal applied from the connected diagnostic scan tool in a state where the engine is started in a vehicle equipped with the ICU; (b) When the electronic control means enters the ICU sub mode from the diagnostic scan tool when the electronic control means enters the ICU mode, the electronic control means determines whether an item of the requested ICU sub mode is accessible. Steps; (c) if it is possible to enter the ICU sub-mode, the electronic control means displays the current data among the items of the ICU mode, performs the sub-mode of the selected item, and transmits and displays the result to the diagnostic scanning tool; ; (d) If it is not possible to enter the ICU sub-mode, the electronic control means transmits a specific message to the diagnostic scanning tool that the item of the requested ICU sub-mode cannot be entered while the engine is in operation. Displaying and inducing an engine stop by an operator who has recognized the message; (e) The electronic control means performs the ICU sub mode of the selected item to diagnose the result when the ignition key is turned on after the engine start is stopped according to a specific message for inducing engine start stop by the diagnostic scan tool. Immobilizer control method during the operation of the engine of the vehicle, characterized in that it comprises the step of transmitting and displaying the scan tool. The method of claim 1, wherein in step (b), The ICU sub-mode includes a mode set to be accessible while the engine is in operation and a mode set to be accessible only when the engine is stopped. The method of claim 1, wherein in step (d), And said specific message is transmitted by said electronic control means and displayed on a display means on said diagnostic scan tool to induce an engine stop by an operator.