Vehicular system, ECU, storing instruction transmission device, and storing request transmission device

• US 10,099,703 B2
• Filed: 07/14/2016
• Issued: 10/16/2018
• 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
• Primary Examiner(s): Han, Charles J
• Application Number:
  US15/209,787
• Publication Number:
  US 20160318522A1
• Time in Patent Office: 824 Days
• Field of Search: 701 291, 701 297, 701 343, 701 334, 701 344
• 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 master ECU generating a vehicle local time periodically and repeatedly;

a first slave ECU receiving the vehicle local time from the master ECU; and

a second slave ECU receiving the vehicle local time from the master ECU, wherein

the second slave ECU is configured to generate diagnostic information and to transmit a storing request to the master ECU when the second slave ECU detects a malfunction,

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

the master ECU is configured to transmit a storing instruction to the first slave ECU and the second slave ECU when receiving the storing request from the second slave ECU so that the first slave ECU and the second slave ECU store the diagnostic information generated by the second slave ECU in association with the vehicle local time generated by the master ECU,

the master ECU is further configured to receive the system identification code from the second slave ECU and to transmit the system identification code to the first slave ECU, and

the first slave ECU is further configured to determine whether to store the diagnostic information on the first slave ECU based on the system identification code received from the master ECU.

2. The vehicular system according to claim 1, wherein

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

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

the first slave ECU is further configured to receive the malfunction classification code included in the storing instruction received from the master ECU.

3. The vehicular system according to claim 1, wherein

the system identification code generated by the second slave ECU in the storing request is related to the detected malfunction, and

the first slave ECU is further configured:

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

4. The vehicular system according to claim 1, 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.