Vehicle-mounted information system, and data gathering method in diagnostic equipment
First Claim
1. A vehicle-mounted information system, comprising:
- a plurality of ECUs that transmit/receive control information to/from each other for controlling a vehicle over an in-vehicle network;
a device under the management and control of the ECUs; and
a diagnostic equipment that gathers, for accumulation, the control information from the network through coupling thereto, whereinthe diagnostic equipment includes;
means for determining whether the vehicle is defective or not based on the control information gathered from the network;
means for making an inquiry to each of the ECUs coupled to the network whether or not there is a memory for temporarily logging information for use with a control-target device thereof; and
means for creating, when the vehicle is determined as being defective, a defect notification message with respect to any of the ECUs whose response against the inquiry is “
yes”
, and transmitting the message to the network, andthe ECUs each include;
means for managing internal information indicating whether a memory area can be reserved for logging the information for use with the device under the management and control of its own;
means for forwarding back the internal information to the diagnostic equipment in response to the inquiry coming over the network to see whether there is the memory;
means for accumulating, in the memory of its own, when the internal information includes information telling that “
there is the memory area”
, the information to be transmitted/received to/from the control-target device of its own; and
means for stopping, when the defect notification message is provided, after accumulating the information for use with the control-target device thereof for a predetermined length of time, the accumulation thereof.
1 Assignment
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Accused Products
Abstract
A diagnostic equipment coupled to a vehicle network makes an inquiry about internal information, e.g., yes or no whether there is a logging-available memory area, with respect to each of a plurality of ECUs, and only to any of the ECUs making a response of yes, e.g., having such a memory area, a notification is made when some defect is observed. The internal information is then gathered from the ECU, and in response to an inquiry about the internal information coming from the diagnostic equipment, the ECU forwards back information about yes or no for logging thereto. When the ECU is available for logging, log data that has been periodically accumulated is forwarded back as a response with respect to a retrieval request therefor from the diagnostic equipment.
33 Citations
8 Claims
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1. A vehicle-mounted information system, comprising:
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a plurality of ECUs that transmit/receive control information to/from each other for controlling a vehicle over an in-vehicle network; a device under the management and control of the ECUs; and a diagnostic equipment that gathers, for accumulation, the control information from the network through coupling thereto, wherein the diagnostic equipment includes; means for determining whether the vehicle is defective or not based on the control information gathered from the network; means for making an inquiry to each of the ECUs coupled to the network whether or not there is a memory for temporarily logging information for use with a control-target device thereof; and means for creating, when the vehicle is determined as being defective, a defect notification message with respect to any of the ECUs whose response against the inquiry is “
yes”
, and transmitting the message to the network, andthe ECUs each include; means for managing internal information indicating whether a memory area can be reserved for logging the information for use with the device under the management and control of its own; means for forwarding back the internal information to the diagnostic equipment in response to the inquiry coming over the network to see whether there is the memory; means for accumulating, in the memory of its own, when the internal information includes information telling that “
there is the memory area”
, the information to be transmitted/received to/from the control-target device of its own; andmeans for stopping, when the defect notification message is provided, after accumulating the information for use with the control-target device thereof for a predetermined length of time, the accumulation thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for gathering vehicle-mounted information by a plurality of ECUs that transmit/receive control information to/from each other for controlling a vehicle over an in-vehicle network, a device under the management and control of the ECUs, and a diagnostic equipment that gathers and accumulates the control information from the network through coupling thereto, the method comprising the steps of:
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by the diagnostic equipment, determining whether the vehicle is defective or not based on the control information gathered from the network; making an inquiry to each of the ECUs coupled to the network whether there is a memory for temporarily logging information for use with a control-target device thereof; and creating, when the vehicle is determined as being defective, a defect notification message with respect to any of the ECUs whose response to the inquiry is “
yes”
, and transmitting the message to the network, andby each of the ECUs, managing internal information indicating whether a memory area can be reserved for logging the information for use with the control-target device of its own; forwarding back the internal information to the diagnostic equipment in response to the inquiry coming over the network to see whether there is the memory; accumulating, in the memory of its own, when the internal information includes information telling that “
there is the memory area”
, the information to be transmitted/received to/from the control-target device of its own; andstopping, when the defect notification message is provided, after the information for use with the control-target device thereof is accumulated for a predetermined length of time, the accumulation thereof.
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8. A diagnostic equipment that is coupled to an in-vehicle network coupled with a plurality of ECUs for controlling a device mounted in a vehicle, and collects, for accumulation, information for use between the ECUs and the device, the diagnostic equipment comprising:
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means for making an inquiry to each of the ECUs whether or not to have a memory capacity for accumulating the information for use with the device; means for gathering, not from any of the ECUs having the memory capacity but from any of the ECUs not having the memory capacity, the information for use between the ECU and the device at the predetermined period, and accumulating the information in an accumulation unit of its own; and means for collectively gathering, when the vehicle is determined as being defective, from the ECU having the memory capacity, the information for use between the ECU and the device accumulated in a memory of the ECU before and after before and after when a defect is determined as occurring, and accumulating the information in the accumulation unit of its own.
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Specification