KR20050017653A - Cluster capable of preventing handling of odometer and vehicle thief - Google Patents

Abstract

PURPOSE: A cluster with an odometer-arbitrary operation-preventing function and a vehicle-antitheft function is provided to make arbitrary operation of an odometer impossible by making starting of the vehicle impossible via an engine control unit in replacing an EEPROM(Electrically Erasable Programmable Read Only Memory) or the cluster. CONSTITUTION: A cluster with odometer-arbitrary operation-preventing function and a vehicle-antitheft function comprises a transmitting and receiving module(32) connected to a key cylinder antenna coil(24) of an immobilizer system; a memory(34) in which integrated data of an odometer is stored and a specific starting key ID(identification) of a vehicle is stored; and a determination part(36) connected to the transmitting and receiving module. The determination part compares a starting key ID input from a starting key(10) with the starting key ID stored in the memory, determines whether the starting key of a normal state is used, and outputs a signal for on/off control of an odometer operation circuit(38) according to the determined result.

Description

Cluster capable of preventing handling of odometer and vehicle thief

The present invention relates to a cluster installed in a vehicle equipped with an immobilizer system and equipped with an electronic totalizer including an operation circuit and an accumulator recording memory. When the built-in EPPROM is replaced or the entire cluster is replaced, the engine is started by an engine ECU. It is impossible to operate the totalizer arbitrarily because it becomes impossible, and at the same time, it relates to a vehicle cluster which performs a vehicle antitheft function by outputting a signal when an abnormal start key is used so that the engine ECU does not permit starting.

In general, a vehicle is provided with a cluster for providing a driver with all information related to driving and operating state information of various devices such as an engine.

Such a cluster is provided with a speedometer, section distance meter, and totalizer for measuring and indicating the instantaneous speed of the vehicle, and also includes an RPM speedometer indicating the engine speed, a fuel gauge indicating the remaining fuel amount, and a coolant thermometer indicating the temperature of the coolant. Etc. are provided.

In this way, among the various indicators provided in the cluster, the totalizer indicates the total driving distance by integrating the traveling distance of the vehicle.The totalizer is a mechanical type, an operation circuit, and an accumulating recording memory (EEPROM: Electrically Erasable Programmable Read Only Memory). It is divided into electronic with built-in).

When the totalizer is attached to the vehicle, the total mileage of the entire section in which the vehicle is driven is recorded and displayed through the totalizer, and the total mileage is added from the time of installation of the totalizer to the time of removal and recorded in the totalizer. It is well known that the total mileage cannot be arbitrarily operated because the total mileage is directly connected to the state of the vehicle and the price calculation of the used car.

Nevertheless, in the case of the mechanical totalizer, it was possible to forcibly turn the totalizer to operate the total mileage, and in the case of the electronic totalizer, the speed sensor output was obtained by replacing the integrated recording memory, that is, the built-in EEPROM, or purchasing a new cluster. The total mileage operation was possible by the method of inputting, and in particular, more fundamental countermeasures for manipulating the total mileage of the electronic totalizer, which is recently increasing in use, are urgently needed.

Therefore, the present invention has been invented to solve the above problems, the vehicle cluster which is inherently impossible to operate the totalizer because it is impossible to start by the engine ECU when replacing the built-in EPPROM or replace the entire cluster The purpose is to provide.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a cluster installed in a vehicle equipped with an immobilizer system and equipped with an electronic totalizer including an operation circuit and an accumulator recording memory.

A transmission / reception module 32 connected to the key cylinder antenna coil 24 of the immobilizer system;

A memory 34 configured to store integration data of the totalizer while storing a unique starting key ID of the vehicle;

The startup key ID connected to the transmission / reception module 32 and input from the startup key 10 is compared with the startup key ID stored in the memory 34 to determine whether a normal startup key is used, and the determination result. A judging section 36 configured to output a signal for on / off control of the totalizer operating circuit 38 according to the present invention;

Characterized in that made by installing.

In particular, the determination unit 36 is connected to the engine ECU 40 for the start control to communicate with each other, the engine including a signal including whether or not the start key ID and the start key ID received from the start key 10 Characterized in that the input to the ECU (40).

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a vehicle cluster equipped with an electronic totalizer having an operation circuit and an accumulator recording memory, and in particular, an arbitrary operation of the totalizer can be fundamentally prevented by being associated with a starter key and an antenna coil among components of an immobilizer system. The present invention relates to a vehicle cluster having an anti-theft function of a vehicle.

First, for the description of the starter key and the antenna coil associated with the device in the cluster of the present invention, a brief description of a known immobilizer system using them is as follows.

1 is a schematic diagram showing a starter key and an antenna coil in a conventional immobilizer system.

Typically, an immobilizer system is a more advanced system of car lock sets for theft prevention of automobiles, which generates an encryption code wirelessly at the ignition key and shows the engine ECU (not shown in FIG. 1). Is a system that permits startup if it matches the pre-stored startup key ID.

That is, when the driver inserts the ignition key into the key hole to start the engine and turns it on, the engine ECU reads the ignition key ID stored in the ignition key. If it is confirmed, the vehicle will be allowed to start, and if it is not the original ignition key of the vehicle, it will not be started.

To this end, a transponder 12 is embedded in the ignition key 10 for decrypting the input cipher, calculating the cipher, and encrypting the calculated signal.

The transponder 12 is operated by electromagnetic force induced from the antenna coil 24 installed around the key cylinder 20. The transponder 12 is turned on to the starting position after the key hole 22 is inserted. In this case, an encryption code is generated by electromagnetic energy transmitted from the antenna coil 24, and the encryption code is wirelessly transmitted to the antenna coil 24.

The engine ECU compares the ignition key ID extracted from the encryption code with the ignition key ID pre-stored in the EEPROM to permit the start if a match is found, and if it does not match, shuts off fuel injection and ignition control to prevent the engine from starting. .

Meanwhile, referring to the accompanying FIG. 2, the structure of the present invention will be described. In the cluster 30 of the present invention, a transmission / reception module 32 connected to an antenna coil 24 installed around the key cylinder 20 is installed.

That is, the antenna coil 24 around the key cylinder 20 is not directly connected to the engine ECU, but is connected to the transmission / reception module 32 of the present invention.

In addition, in the cluster 30 of the present invention, the integrated data of the totalizer is stored and the memory for storing the starter key ID, that is, the EPPROM 34 and the encryption code input through the transmission / reception module 32 are decoded. After that, it is determined whether or not the start key in the normal state is used, and a plate for outputting a signal for controlling the on / off of the totalizer operating circuit 38 already installed in the cluster 30 according to the determination result. The government 36 is established.

Here, the determination unit 36 decrypts the encryption code input through the transmission and reception module 32 and compares the startup key ID extracted from the encryption code with the vehicle's unique startup key ID previously stored in the EEPROM 34. In case of a match, a control signal for turning on the totalizer operating circuit 38 is output. If not, a control signal for turning off the totalizer operating circuit 38 is output.

In addition, the determination unit 36 is communicatively connected to the engine ECU 40 through the communication line K line, and eventually outputs a signal according to the determination result to the engine ECU 40 through the K line.

At this time, the determination unit 36 outputs a signal according to the determination result to the engine ECU 40 along with the encrypted start key ID input through the antenna coil 24, and the engine ECU 40 determines the determination unit. If a signal indicating a start key ID mismatch is input from 36, the vehicle is not allowed to start.

On the other hand, when the engine ECU 40 receives a signal indicating that the ignition key ID matches from the determination unit 36 in the cluster 30, the engine ECU 40 stores the ignition key ID input from the determination unit 36 in its own internal memory, that is, It is compared again with the vehicle's unique start key ID previously stored in the EPPROM 42, where it is allowed to start the vehicle.

Of course, the storage unit of the engine ECU 40, that is, the EEPROM 42 uses an external device (eg, HI-SCAN) 50 when the engine is first started, and is unique to the vehicle through the communication line K line based on the GST protocol. The ignition key ID must be entered and stored in advance.

Similarly, the vehicle-specific starting key ID stored in the EEPROM 42 of the engine ECU 40 is also stored in the EPPROM 34 for integration recording in the cluster 30 via the communication line K line via the engine ECU 40. Of course, it must be input and stored in advance.

Hereinafter, referring to the accompanying FIG. 3, a process of performing an integrated system random manipulation prevention and a vehicle theft prevention function in the cluster 30 according to the present invention will be described.

First, when the driver inserts the ignition key 10 into the key hole 22 for starting, and turns it on, the encryption code output from the transponder 12 of the ignition key 10 is the key cylinder 20. The wireless transmission to the surrounding antenna coil 24, the encryption code received by the antenna coil 24 is transmitted to the determination unit 36 via the transmission and reception module 32 in the cluster 30 of the present invention.

The determination unit 36 compares the ignition key ID extracted from the encryption code with the vehicle-specific ignition key ID previously stored in the integration record EPPROM 34 to confirm that the ignition key currently used by the driver is a normal ignition key. do.

If it matches, a control signal for turning on the totalizer operating circuit 38 is output, and if not, a control signal for turning off the totalizer operating circuit 38 is output.

Meanwhile, the determination unit 36 transmits an encrypted start key ID of the inserted start key and a signal according to the determination result, that is, a predetermined signal indicating a match or inconsistency to the engine ECU 40 through the communication line K line. The engine ECU 40 cuts off fuel injection and ignition control when a signal indicating a mismatch is input to prevent the engine from starting.

If the engine ECU 40 receives a signal indicating the match, the vehicle-specific start key stored in the internally stored memory, that is, the EPPROM 42, is stored in the start-up key ID inputted from the determination unit 36 of the cluster 30. The ID is compared again, and if it matches, the vehicle is allowed to start.

Of course, the engine ECU 40 does not allow the engine start if the start key ID comparison does not match each other.

As described above, according to the cluster having the integrated system random operation prevention and vehicle theft prevention function according to the present invention, when the built-in EPPROM is replaced or the entire cluster is replaced, starting is not possible by the engine ECU. Random operation becomes impossible, and when an abnormal start key is used, a signal is output so that the engine ECU does not permit starting, thereby performing a vehicle antitheft function.

1 is a schematic diagram showing a starter key and an antenna coil in a conventional immobilizer system;

2 is a block diagram of a device in a cluster according to the present invention;

3 is a flowchart illustrating a process of performing a totalizer random manipulation prevention and a vehicle theft prevention function in a cluster according to the present invention.

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

10: ignition key 12: transponder

20: key cylinder 24: antenna coil

30: cluster 32: transceiver module

34 memory 36 judgment unit

38: totalizer operating circuit 40: engine ECU

42: memory

Claims (2)

A cluster installed in a vehicle equipped with an immobilizer system and equipped with an electronic totalizer including an operating circuit and an accumulator recording memory, A transmission / reception module 32 connected to the key cylinder antenna coil 24 of the immobilizer system; A memory 34 configured to store integration data of the totalizer while storing a unique starting key ID of the vehicle; The startup key ID connected to the transmission / reception module 32 and input from the startup key 10 is compared with the startup key ID stored in the memory 34 to determine whether a normal startup key is used, and the determination result. A judging section 36 configured to output a signal for on / off control of the totalizer operating circuit 38 according to the present invention; The cluster having a totalizer random operation prevention and vehicle theft prevention function, characterized in that made by installing. The method according to claim 1, wherein the determination unit 36, It is connected to the engine ECU 40 for the start control to communicate with each other, and inputs a signal including whether the start key ID and the start key ID received from the start key 10 to the engine ECU 40, characterized in that A cluster having a totalizer random operation prevention and a vehicle theft prevention function.