Data recording apparatus and data recording method
First Claim
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1. A data recording apparatus, operated by electric power supplied from a vehicle side, comprising:
- a data recording section accessible by an external system and including a non-volatile memory for storing control parameters of a control unit mounted in a vehicle;
a random access memory for temporarily storing the control parameters chronologically acquired from the control unit; and
a data control section for recording, into the data recording section, a series of the control parameters within a predetermined period having an acquisition condition, among the chronological control parameters recorded in the random access memory, wherein the acquisition condition indicates a condition by which a vehicle data effective for identifying a failure state of the vehicle will be obtained, wherein, at time of shutdown, the data control section records, into the data recording section, the chronological control parameters recorded in the random access memory irrespective of the acquisition condition.
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Abstract
Control parameters that are chronologically acquired from a control unit are temporarily recorded into a random access memory. Then, a data control section records a series of control parameters within a predetermined period that have a predetermined acquisition condition into a data recording section, among the chronological control parameters recorded in the random access memory. In this case, at time of shutdown, the data control section records the chronological control parameters recorded in the random access memory into the data recording section irrespective of the acquisition conditions.
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Citations
7 Claims
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1. A data recording apparatus, operated by electric power supplied from a vehicle side, comprising:
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a data recording section accessible by an external system and including a non-volatile memory for storing control parameters of a control unit mounted in a vehicle;
a random access memory for temporarily storing the control parameters chronologically acquired from the control unit; and
a data control section for recording, into the data recording section, a series of the control parameters within a predetermined period having an acquisition condition, among the chronological control parameters recorded in the random access memory, wherein the acquisition condition indicates a condition by which a vehicle data effective for identifying a failure state of the vehicle will be obtained, wherein, at time of shutdown, the data control section records, into the data recording section, the chronological control parameters recorded in the random access memory irrespective of the acquisition condition. - View Dependent Claims (2, 3, 4)
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5. A data recording method, for a data recording apparatus operated by electric power supplied from a vehicle side and for recording control parameters of a control unit mounted in a vehicle into a non-volatile memory in a data recording section accessible by an external system, comprising:
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a first step of temporarily recording the control parameters chronologically acquired from the control unit into a random access memory;
a second step of recording, into the data recording section, a series of the control parameters during a predetermined period having an acquisition condition, among the chronological control parameters recorded in the random access memory, wherein the acquisition condition indicates a condition by which a vehicle data effective for identifying a failure state of the vehicle will be obtained; and
wherein in the second step, at time of shutdown, the chronological control parameters recorded in the random access memory are recorded in the data recording section irrespective of the acquisition condition. - View Dependent Claims (6, 7)
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Specification