Vehicle electronic control device and system with off-board diagnostic function

• US 9,978,188 B2
• Filed: 01/22/2016
• Issued: 05/22/2018
• Est. Priority Date: 01/29/2015
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Oda, Shinichiro, Enomoto, Hiroyuki
• Primary Examiner(s): Olszewski, John
• Assistant Examiner(s): Ziaeianmehdizadeh, Navid
• Application Number:
  US15/003,971
• Publication Number:
  US 20160225197A1
• Time in Patent Office: 851 Days
• Field of Search: None
• CPC Class Codes: G07C 2205/02 using a vehicle scan tool
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C

Abstract

An electronic control device (ECU) refrains from a transmission of a requested diagnosis data while IGSW is turned ON in case that an external device is connected to a dedicated connector. After turning OFF of IGSW, regardless of the connection of the external device to the connector, the transmission of the requested diagnosis data to the center is performed. As a result, a delay of an off-board diagnosis process in the ECU due to the transmission of the diagnosis data is prevented. Further, the data required for performing a remote diagnosis service is regularly transmitted to a management center. Therefore, the remote diagnosis service is performable when a commercially-available external device is connected to the dedicated connector by a user of a vehicle.

Claims

1. An electronic control device installed in a vehicle configured to control a transmission of vehicle diagnostic data to an external management center, the electronic control device comprising:

a microcomputer configured to interface with vehicle sensors and actuators to accumulate vehicle diagnostic data from the vehicle sensors and actuators and to store the vehicle diagnostic data into a memory in response to a request message from an external diagnostic device, wherein

the microcomputer is further configured to detect an ON state and an OFF state of a vehicle ignition switch, and wherein

when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer is further configured to communicate with a power supply IC to maintain a power supply from a vehicle battery to the electronic control device via a power relay, and wherein

the microcomputer is further configured to detect a connection of an external device or the external diagnostic device to a dedicated connector within the vehicle, and wherein

when the microcomputer detects the ON state of the vehicle ignition switch and the connection of the external device or the external diagnostic device to the dedicated connector, the microcomputer refrains from sending the vehicle diagnostic data stored in the memory to a communication module for transmission to the external management center, and wherein

when the microcomputer detects the OFF state of the vehicle ignition switch and the connection of the external device or the external diagnostic device to the dedicated connector, the microcomputer transmits the vehicle diagnostic data stored in the memory to the communication module for transmission to the external management center.

2. The electronic control device of claim 1, wherein

in response to the microcomputer receiving a data transmission request from the external management center, the microcomputer transmits the vehicle diagnostic data stored in the memory to the communication module for transmission to the external management center.

3. The electronic control device of claim 2, wherein

during the OFF state of the vehicle ignition switch, the data transmission request from the external management center is sent to the microcomputer via an output ECU in the vehicle.

4. The electronic control device of claim 1, wherein when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer maintains the power supply from the vehicle battery to the electronic control device for a preset amount of time.

5. The electronic control device of claim 1, wherein when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer maintains the power supply from the vehicle battery to the electronic control device and the communication module until the communication module transmits the vehicle diagnostic data to the external management center.

6. The electronic control device of claim 1, wherein

the microcomputer is further configured to communicate with a mechanical switch of the dedicated connector to detect the connection of the external device or the external diagnostic device to the dedicated connector and to detect a disconnection of the external device or the external diagnostic device from the dedicated connector.

7. The electronic control device of claim 1, wherein

the microcomputer is further configured to detect a disconnection of the external diagnostic device from the dedicated connector after a preset amount of time elapses after the microcomputer receives the request message from the external diagnostic device.

8. An electronic control system in a vehicle configured to control a transmission of vehicle diagnostic data to an external management center, the control system comprising:

a microcomputer configured to interface with vehicle sensors and actuators to accumulate vehicle diagnostic data from the vehicle sensors and actuators and to store the vehicle diagnostic data into a memory in response to a request message from an external diagnostic device;

a communication module configured to transmit the vehicle diagnostic data stored in the memory to the external diagnostic device; and

a battery configured to supply power to the microcomputer and the communication module;

a power supply IC connected to the battery and in communication with the microcomputer, the power supply IC configured to output a signal to generate a current flow;

a power relay connected to the battery and the power supply IC, the power relay configured to switch ON and OFF in response to the current flow; and

a dedicated connector disposed within the vehicle and in connection with the microcomputer, the dedicated connector configured to connect with an external device or the external diagnostic device, wherein

the microcomputer is further configured to detect an ON state and an OFF state of a vehicle ignition switch, and wherein

when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer is further configured to communicate with the power supply IC to output the signal to generate the current flow to switch the power relay ON to maintain a power supply from the battery to the microcomputer and the communication module, and wherein

the microcomputer is further configured to detect a connection of the external device or the external diagnostic device to the dedicated connector, and wherein

when the microcomputer detects the ON state of the vehicle ignition switch and the connection of the external device or the external diagnostic device to the dedicated connector, the microcomputer refrains from sending the vehicle diagnostic data stored in the memory to the communication module for transmission to the external management center, and wherein

when the microcomputer detects the OFF state of the vehicle ignition switch and the connection of the external device or the external diagnostic device to the dedicated connector, the microcomputer transmits the vehicle diagnostic data stored in the memory to the communication module for transmission to the external management center.

9. The electronic control device of claim 8, wherein

the communication module transmits the vehicle diagnostic data stored in the memory to the external management center in response to the microcomputer receiving a data transmission request from the external management center.

10. The electronic control device of claim 9 further comprising:

an output ECU configured to send the data transmission request from the external management center to the microcomputer during the OFF state of the vehicle ignition switch.

11. The electronic control device of claim 8, wherein

when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer communicates with the power supply IC to maintain the power supply from the vehicle battery via the power relay to the microcomputer and the communication module for a preset amount of time.

12. The electronic control device of claim 8, wherein

when the microcomputer detects the OFF state of the vehicle ignition switch, the microcomputer communicates with the power supply IC to maintain the power supply from the vehicle battery via the power relay to the microcomputer and the communication module until the communication module transmits the vehicle diagnostic data to the external management center.

13. The electronic control device of claim 8, wherein the dedicated connector includes a mechanical switch for detecting the connection of the external device or the external diagnostic device to the dedicated connector and for detecting a disconnection of the external device or the external diagnostic device from the dedicated connector.

14. The electronic control device of claim 13, wherein the microcomputer is further configured to detect the disconnection of the external diagnostic device from the dedicated connector after a preset amount of time elapses after the microcomputer receives the request message from the external diagnostic device.