Vehicular System, ECU, Storing Instruction Transmission Device, And Storing Request Transmission Device

• US 20160318522A1
• Filed: 07/14/2016
• Published: 11/03/2016
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: TANAKA, Masahiko, NATSUME, Mitsuyoshi, TAKAHASHI, Yasuyuki, HARATA, Yuzo
• Granted Patent: US 10,099,703 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60W 50/04 Monitoring the functioning of the control system
• CPC Class Codes: H04L 12/40091 Bus bridging LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A vehicular system includes a master ECU, a first slave ECU, and a second slave ECU. The second slave ECU transmits a storing request to the master ECU on detection of a malfunction. The master ECU transmits a storing instruction for causing diagnostic information to be stored, on reception of the storing request. The first slave ECU generates diagnostic information on the first slave ECU, on reception of the storing instruction from the master ECU. The first slave ECU further stores the generated diagnostic information in a retention storage medium. The retention storage medium is configured to retain validity determination information in a condition where the first slave ECU is not supplied with electric power source.

Claims

1. A vehicular system equipped to a vehicle, the vehicular system comprising:

a first ECU; and

a second ECU connected to the first ECU through a communication line, wherein

the second ECU is provided with a retention storage medium which retains storing information in a condition where the second ECU is not supplied with electric power,

the first ECU transmits a malfunction classification code, which represents a classification of the malfunction, to the second ECU through the communication line on reception of a malfunction of the first ECU, and

the second ECU stores the malfunction classification code in the retention storage medium on reception of the malfunction classification code transmitted from the first ECU.

2. The vehicular system according to claim 1, wherein

the second ECU generates diagnostic information of the second ECU and stores the diagnostic information in the retention storage medium when the second ECU determines that the malfunction classification code is received.

3. The vehicular system according to claim 2, wherein

the second ECU receives a system identification code, which represents the classification of the malfunction in addition to the malfunction classification code, and determines whether the second ECU generates the diagnostic information based on the system identification code.

4. A vehicular system equipped to a vehicle, the vehicular system comprising:

a first ECU; and

a second ECU connected to the first ECU through a communication line, wherein

the second ECU is provided with a retention storage medium which retains storing information in a condition where the second ECU is not supplied with electric power,

the first ECU transmits a malfunction classification code, which represents a classification of the malfunction, to the second ECU through the communication line on reception of a malfunction of the first ECU;

the second ECU receives the malfunction classification code from the first ECU through the communication line, and stores the malfunction classification code in the retention storage medium.

5. The vehicular system according to claim 4, wherein

the second ECU generates diagnostic information of the second ECU and stores the diagnostic information in the retention storage medium when the second ECU determines that the malfunction classification code is received.

6. The vehicular system according to claim 5, wherein

the second ECU receives a system identification code, which represents the classification of the malfunction in addition to the malfunction classification code, and determines whether the second ECU generates the diagnostic information based on the system identification code.

7. A vehicular system equipped to a vehicle, the vehicular system comprising;

a master ECU;

a first slave ECU; and

a second slave ECU, wherein

the second slave ECU is configured to transmit a storing request to the master ECU on detection of a malfunction of the second slave ECU,

the master ECU is configured to transmit a storing instruction on reception of the storing request so as to store diagnostic information, and

the first slave ECU is configured, on reception of the storing instruction from the master ECU;

to generate diagnostic information on the first slave ECU; and

to store the generated diagnostic information in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the first slave ECU is not supplied with electric power.

8. The vehicular system according to claim 7, wherein

the second slave ECU is further configured to include a malfunction classification code, which represents a classification of the malfunction, in the storing request to be transmitted to the master ECU,

the master ECU is further configured to include the malfunction classification code, which is included in the storing request received from the second slave ECU, in the storing instruction to be transmitted, and

the first slave ECU is further configured to include the malfunction classification code, which is included in the storing instruction received from the master ECU, in the diagnostic information on the first slave ECU.

9. The vehicular system according to claim 7, wherein

the second slave ECU is further configured to include a predetermined system identification code in the storing request to be transmitted to the master ECU,

the master ECU is further configured to include the system identification code, which is included in the storing request received from the second slave ECU, in the storing instruction to be transmitted, and

the first slave ECU is further configured to determine whether to store the diagnostic information on the first slave ECU according to the system identification code included in the storing instruction received from the master ECU.

10. The vehicular system according to claim 9, wherein

the system identification code, which the second slave ECU includes in the storing request, is related to the detected malfunction,

the first slave ECU is further configured:

to store the diagnostic information on the first slave ECU, when the system identification code, which is included in the storing instruction received from the master ECU, corresponds to a group to which the first slave ECU belongs; and

not to store the diagnostic information on the first slave ECU, when the system identification code, which is included in the storing instruction received from the master ECU, does not correspond to the group to which the first slave ECU belongs.

11. The vehicular system according to claim 7, wherein

the first slave ECU is further configured:

to select data according to the system identification code included in the storing instruction received from the master ECU; and

to include the selected data in the diagnostic information and store the diagnostic information.