Control information rewriting system
First Claim
1. A control information rewriting system for a vehicle comprising:
- an electronic control unit mounted in the vehicle for a vehicle control and having control information stored in electrically rewritable nonvolatile memory for the vehicle control;
a rewriting device connectable to the electronic control unit for rewriting the control information; and
a control center for performing data communication with the rewriting device, wherein the control center includes storing means storing the predetermined access information, identification information of the rewriting device and associated information associated with the identification information, and legitimacy determining means for acquiring the identification information and the associated information of the rewriting device in data communication with the rewriting device, and transmitting and not transmitting access information stored in the storing means to the rewriting device when an association relationship of the acquired information matches and does not match an association relationship stored in the storing means thereby to enable and disable rewriting operation of the rewriting device, respectively.
1 Assignment
0 Petitions
Accused Products
Abstract
In a control information rewriting system, a rewriting device for vehicle-ECUs and a control center are provided. A function f necessary for the rewriting device to access the ECUs is stored the control center. When data communication is carried out by way of a telephone line network, the control center acquires ID information from the rewriting device and acquires a telephone number of the call origin. When the association relationship between this ID and telephone number matches an association relationship stored in the database, the control center determines the rewriting device to be a legitimate one. Only when the control center determines that the rewriting device is a legitimate one, it transmits the function f to the rewriting device to enable rewriting of control information of the ECUs.
52 Citations
35 Claims
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1. A control information rewriting system for a vehicle comprising:
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an electronic control unit mounted in the vehicle for a vehicle control and having control information stored in electrically rewritable nonvolatile memory for the vehicle control;
a rewriting device connectable to the electronic control unit for rewriting the control information; and
a control center for performing data communication with the rewriting device, wherein the control center includes storing means storing the predetermined access information, identification information of the rewriting device and associated information associated with the identification information, and legitimacy determining means for acquiring the identification information and the associated information of the rewriting device in data communication with the rewriting device, and transmitting and not transmitting access information stored in the storing means to the rewriting device when an association relationship of the acquired information matches and does not match an association relationship stored in the storing means thereby to enable and disable rewriting operation of the rewriting device, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control center for communication with a control information rewriting device which rewrites control information stored in a nonvolatile memory, the control center comprising:
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storing means storing associated information associated with identification information of the rewriting device; and
legitimacy determining means for acquiring the associated information of the rewriting device in data communication with the rewriting device, and transmitting and not transmitting rewriting permission to the rewriting device when an association relationship of the acquired identification corresponds and does not correspond to the associated information stored in the storing means, respectively, thereby to control rewriting operation of the rewriting device. - View Dependent Claims (14, 15, 16, 17)
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18. A control center for communication with a control information rewriting device which rewrites control information stored in an electronic control unit, the control center comprising:
a processing unit programmed to receive information specific to the electronic control unit from the rewriting device, determine a modification data to which the control information is to be rewritten, and transmit the determined modification data to the rewriting device. - View Dependent Claims (19, 20, 21, 22)
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23. A rewriting device for rewriting control information stored an electronic control unit while communicating with an external device, the rewriting device comprising:
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receiving means for receiving a rewriting permission from the external device; and
control information transmitting means for acquiring the control information from the external device after executing predetermined processing with the electronic control unit in response to the rewriting permission, and transmitting the control information to the electronic control unit. - View Dependent Claims (24)
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25. A rewriting device for rewriting control information stored an electronic control unit with modification data while communicating with an external device, the rewriting device comprising:
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specific information receiving means for receiving specific information from the electronic control unit;
specific information transmitting means for transmitting the specific information to the external device;
modification data receiving means for receiving from the external device the modification data corresponding to the specific information; and
control information transmitting means for transmitting the modification data to the electronic control unit.
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26. A control information rewriting system for a vehicle comprising:
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an electronic control unit mounted in the vehicle for a vehicle control and having control information stored in electrically rewritable nonvolatile memory for the vehicle control;
a rewriting device connectable to the electronic control unit for rewriting the control information by using predetermined access information; and
a control center for performing data communication with the rewriting device, wherein the rewriting device converts data received from the electronic control unit based on the access information upon receiving the access information from the control center and transmits the converted data to the electronic control unit. - View Dependent Claims (27)
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28. An electronic control unit for rewriting information with control information transmitted from a rewriting device, the unit comprising:
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storing means storing the information;
transmitting means for transmitting specific information specific to the electronic control unit to the rewriting device;
receiving means for receiving the control information selected based on the specific information from the rewriting device; and
rewriting means for rewriting the control information in the storing means. - View Dependent Claims (29)
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30. A control information rewriting system for a vehicle comprising:
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an electronic control unit mounted in the vehicle for a vehicle control and having control information stored in electrically rewritable nonvolatile memory for the vehicle control;
a rewriting device connectable to the electronic control unit for rewriting the control information by using predetermined access information; and
a control center for performing data communication with the rewriting device, wherein the electronic control unit determines whether the rewriting device is legitimate by receiving information which is formed by the rewriting device based on the access information received from the control center. - View Dependent Claims (31, 32, 33, 34)
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35. A control information rewriting system for a vehicle comprising:
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an electronic control unit mounted in the vehicle for a vehicle control and having a control program stored in electrically rewritable nonvolatile memory for the vehicle control;
a rewriting device connectable to the electronic control unit for rewriting the control program; and
a control center for performing data communication with the rewriting device, wherein the control center is programmed to determine whether the control program is normal by checking whether a check sum of the control program transmitted from the electronic control unit through the rewriting device along with a vehicle specific information, and transmit a new control program to the rewriting device so that the new control program is rewritten in the nonvolatile memory when determining that the control program is abnormal.
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Specification