Vehicle Central Lock Antitheft Method and System

• US 20100286846A1
• Filed: 06/30/2008
• Published: 11/11/2010
• Est. Priority Date: 02/27/2008
• Status: Active Grant

• Current Assignee: Chongqing Changan Automobile Company Limited
• Original Assignee: Chongqing Changan Automobile Company Limited
• Inventors: Liang, Peng, Liang, Fenghua, He, Jugang
• Granted Patent: US 8,924,041 B2
• Time in Patent Office: Days
• US Class Current: 701/2
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user

Abstract

A vehicle central lock antitheft method and system includes a central lock system which is connected by radio with a remote controller for identity verification using rolling codes (S101, S102), wherein the central lock system chooses a security state (S103) and transmits the security state to an engine management system according to the verification result, the ignition IG status and the door switch status signal indicating opening or closing of the door (S104). The engine management system receives the security state transmitted by the central lock system and verifies the identity of the central lock system by code matching (S106); security identification between the engine management system and the central lock system is carried out by bidirectional encryption communication (S107). The engine management system then decides whether or not to lock the engine according to the result of the security identification.

Claims

1. A vehicle central control antitheft method, comprising:

performing, by a central control system, identity verification for a remote control via cipher matching;

selecting, by the central control system, an alert status in response to a result of identity verification of the remote control, status of an ignition switch and an action of opening or closing a vehicle door, and transmitting the alert status to an engine management system;

receiving, by the engine management system, the alert status transmitted from the central control system, and performing identity verification for the central control system via cipher matching;

performing safety authentication between the engine management system and the central control system in bidirectional encrypted communication; and

locking or unlocking, by the engine management system, an engine in response to a result of safety authentication.

2. The vehicle central control antitheft method according to claim 1, wherein the central control system communicates with the engine management system via a data bus.

3. The vehicle central control antitheft method according to claim 1, wherein the central control system performs identity verification for the remote control in a hopping code algorithm.

4. The vehicle central control antitheft method according to claim 1, wherein the engine management system performs identity verification for the central control system in a hopping code algorithm.

5. The vehicle central control antitheft method according to claim 3, wherein the hopping code algorithm is derived from Keelog algorithm or AES algorithm in which there are a cryptographic key of no less than 64 bits and a synchronous counter of no less than 16 bits.

6. The vehicle central control antitheft method according to claim 1, wherein the central control system transmits a cryptograph of the alert status of the central control system to the engine management system;

and the engine management system decrypts the cryptograph and performs safety authentication with the central control system in bidirectional encrypted communication in the case that a decryption result is an alarm inactivation status.

7. The vehicle central control antitheft method according to claim 2, wherein the data bus is a CAN bus, LIN bus or K-Line bus.

8. The vehicle central control antitheft method according to claim 1, wherein the remote control is a remote key.

9. The vehicle central control antitheft method according to claim 1, wherein when the ignition switch of the vehicle is in the status OFF, the alert status comprises a pre-alerting status, an alerting status, an alarm activation status and an alarm inactivation status, which can transit to each other under different conditions;

and when the ignition switch of the vehicle is in the status ON, the alert status comprises the alarm activation status and the alarm inactivation status, so that the alarm activation status can transition to the alarm inactivation status only upon unlocking via a remote key, and the alarm inactivation status can not transition to the alarm activation status.

10. The vehicle central control antitheft method according to claim 9, wherein each time the alert status is changed, the central control system transmits latest alert status to the engine management system.

11. The vehicle central control antitheft method according to claim 1, wherein the engine management system locks or unlocks the engine by controlling oil rejection.

14. The vehicle central control antitheft method according to claim 4, wherein the hopping code algorithm is derived from Keelog algorithm or AES algorithm in which there are a cryptographic key of no less than 64 bits and a synchronous counter of no less than 16 bits.

15. The vehicle central control antitheft method according to claim 2, wherein the central control system transmits a cryptograph of the alert status of the central control system to the engine management system;

and the engine management system decrypts the cryptograph and performs safety authentication with the central control system in bidirectional encrypted communication in the case that a decryption result is an alarm inactivation status.

16. The vehicle central control antitheft method according to claim 2, wherein when the ignition switch of the vehicle is in the status OFF, the alert status comprises a pre-alerting status, an alerting status, an alarm activation status and an alarm inactivation status, which can transit to each other under different conditions;

and when the ignition switch of the vehicle is in the status ON, the alert status comprises the alarm activation status and the alarm inactivation status, so that the alarm activation status can transition to the alarm inactivation status only upon unlocking via a remote key, and the alarm inactivation status can not transition to the alarm activation status.

17. The vehicle central control antitheft method according to claim 2, wherein the engine management system locks or unlocks the engine by controlling oil rejection.

12. A vehicle central control antitheft system, comprising a remote control, a central control system and an engine management system, wherein:

the central control system performs identity verification for the remote control via cipher matching; and

the engine management system communicates with the central control system via a data bus, performs identity verification for the central control system via cipher matching and safety authentication with the central control system in bidirectional encrypted communication, and locks or unlocks an engine in response to a result of safety authentication.

13. The vehicle central control antitheft system according to claim 12, wherein the data bus is a CAN bus, LIN bus or K-Line bus, and the remote control is a remote key.