Vehicular data recording apparatus
First Claim
1. A vehicular data recording apparatus for recording, at a time of occurrence of a certain event, a system operation condition data that is related to a system operation condition of a vehicle control system that controls a vehicle, the apparatus comprising:
- a recorder in each of a plurality of electronic control units (ECUs) in the vehicle control system in which each ECU stores data in their respective recorder, the ECUs are communicably coupled to each other,wherein when at least one of the ECUs detects an occurrence of an event, a detecting ECU that detected the occurrence of the event records a data held by the detecting ECU that is related to the system operation condition of the vehicle control system in the recorder of the detecting ECU, andthe detecting ECU notifies the remaining ECUs of the occurrence of the event, and each of the remaining ECUs, respectively, at least records a data held by the remaining ECUs that is related to the system operation condition of the vehicle control system in their respective recorder, whereinthe data recorded in the vehicular data recording apparatus is output to an external diagnosis device,output of the recorded data to the external diagnosis device is performed (a) after data collection from the recorder in the each of the ECUs by one of the ECUs, or (b) after data collection from the recorder in each of the ECUs by a dedicated ECU for collecting the data, andcollection of the data is performed by one of the ECUs or the dedicated ECU when communication load for data exchange that is required for vehicle control among the ECUs is lower than a threshold.
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Abstract
Each of a plurality of electronic control units (i.e., ECUs) of a vehicle control system has a memory for recording data regarding a system operation condition of the vehicle control system. When one of the ECUs detects an occurrence of a predetermined abnormal event, that ECU records data regarding the system operation condition of the vehicle control system, which is held by that ECU, in the memory of that ECU. Further, the detecting ECU notifies the other ECUs of the occurrence of the predetermined abnormal event. Accordingly, each of the remaining ECUs records data regarding the system operation condition of the vehicle control system held by each of them to its memory. In such manner, even if multiple ECUs are installed as the vehicle control system, a vehicular data recording apparatus is enabled to record required data at a time of occurrence of a predetermined event.
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Citations
10 Claims
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1. A vehicular data recording apparatus for recording, at a time of occurrence of a certain event, a system operation condition data that is related to a system operation condition of a vehicle control system that controls a vehicle, the apparatus comprising:
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a recorder in each of a plurality of electronic control units (ECUs) in the vehicle control system in which each ECU stores data in their respective recorder, the ECUs are communicably coupled to each other, wherein when at least one of the ECUs detects an occurrence of an event, a detecting ECU that detected the occurrence of the event records a data held by the detecting ECU that is related to the system operation condition of the vehicle control system in the recorder of the detecting ECU, and the detecting ECU notifies the remaining ECUs of the occurrence of the event, and each of the remaining ECUs, respectively, at least records a data held by the remaining ECUs that is related to the system operation condition of the vehicle control system in their respective recorder, wherein the data recorded in the vehicular data recording apparatus is output to an external diagnosis device, output of the recorded data to the external diagnosis device is performed (a) after data collection from the recorder in the each of the ECUs by one of the ECUs, or (b) after data collection from the recorder in each of the ECUs by a dedicated ECU for collecting the data, and collection of the data is performed by one of the ECUs or the dedicated ECU when communication load for data exchange that is required for vehicle control among the ECUs is lower than a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicular data recording apparatus for recording, at a time of occurrence of a certain event, a system operation condition data that is related to a system operation condition of a vehicle control system that controls a vehicle, the apparatus comprising:
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a recorder in each of a plurality of electronic control units (ECUs) in the vehicle control system in which each ECU stores data in their respective recorder, the ECUs are communicably coupled to each other, wherein when at least one of the ECUs detects an occurrence of an event, a detecting ECU that detected the occurrence of the event records a data held by the detecting ECU that is related to the system operation condition of the vehicle control system in the recorder of the detecting ECU, and the detecting ECU notifies the remaining ECUs of the occurrence of the event, and each of the remaining ECUs, respectively, at least records a data held by the remaining ECUs that is related to the system operation condition of the vehicle control system in their respective recorder, wherein the data recorded in the vehicular data recording apparatus is output to an external diagnosis device, output of the recorded data to the external diagnosis device is performed (a) after data collection from the recorder in the each of the ECUs by one of the ECUs, or (b) after data collection from the recorder in each of the ECUs by a dedicated ECU for collecting the data, collection of the data is performed by one of the ECUs or by the dedicated ECU upon receiving a command that specifies the data to be collected, and one of the ECUs or the dedicated ECU collects the data from the ECUs according to the received command.
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10. A vehicular data recording apparatus for recording, at a time of occurrence of a certain event, a system operation condition data that is related to a system operation condition of a vehicle control system that controls a vehicle, the apparatus comprising:
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a recorder in each of a plurality of electronic control units (ECUs) in the vehicle control system in which each ECU stores data in their respective recorder, the ECUs are communicably coupled to each other, wherein when at least one of the ECUs detects an occurrence of an event, a detecting ECU that detected the occurrence of the event records a data held by the detecting ECU that is related to the system operation condition of the vehicle control system in the recorder of the detecting ECU, the detecting ECU notifies the remaining ECUs of the occurrence of the event, and each of the remaining ECUs, respectively, at least records a data held by the remaining ECUs that is related to the system operation condition of the vehicle control system in their respective recorder, and the data recorded in the vehicular data recording apparatus is output to an external diagnosis device, and output of the recorded data is performed by turns from the recorder in each of the ECUs to the external diagnosis device.
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Specification