Controller of electric power steering apparatus
First Claim
1. A controller of an electric power steering apparatus, comprising:
- a steering assist control mechanism comprising an electric motor giving a steering assist force to a steering system;
abnormality detection means for detecting an abnormality of the steering assist control mechanism; and
abnormality data storage means for storing abnormality analysis data for analyzing the abnormality in the storage means when the abnormality of the steering assist control mechanism is detected by the abnormality detection means,wherein said storage means comprises an overwrite prohibition storage area for prohibiting an overwrite of said abnormality analysis data and an overwrite allowable storage area for overwriting and storing said abnormality analysis data, andwherein said abnormality data storage means is constituted to store an abnormality of the steering assist control mechanism detected by the abnormality detection means in said overwrite prohibition storage area when the abnormality is a first abnormality analysis data, and store the abnormality in said overwrite allowable storage area when the abnormality is the abnormality analysis data subsequent to the second time.
1 Assignment
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Accused Products
Abstract
An initial abnormality analysis data is reliably retained by a controller of an electric power steering apparatus. The controller of the electric power steering apparatus is constituted by comprising abnormality detection device for detecting the abnormality of a steering assist control mechanism comprising an electric motor giving a steering assist force to a steering system and abnormality data storage device for storing abnormality analysis data in storage device when the abnormality of the steering assist control mechanism is detected by this abnormality detection device, wherein the storage device comprises a plurality of overwrite prohibition storage areas for prohibiting rig the overwrite of the abnormality analysis data and a plurality of overwrite allowable storage areas for overwriting and storing the abnormality analysis data, and wherein the abnormality data storage device stores the abnormality of the steering assist control mechanism detected by the abnormality detection device in the overwrite prohibition storage area when the abnormality is a first abnormality analysis data, and stores the abnormality in the overwrite allowable storage area when the abnormality is the abnormality analysis data subsequent to the second time.
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Citations
18 Claims
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1. A controller of an electric power steering apparatus, comprising:
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a steering assist control mechanism comprising an electric motor giving a steering assist force to a steering system; abnormality detection means for detecting an abnormality of the steering assist control mechanism; and abnormality data storage means for storing abnormality analysis data for analyzing the abnormality in the storage means when the abnormality of the steering assist control mechanism is detected by the abnormality detection means, wherein said storage means comprises an overwrite prohibition storage area for prohibiting an overwrite of said abnormality analysis data and an overwrite allowable storage area for overwriting and storing said abnormality analysis data, and wherein said abnormality data storage means is constituted to store an abnormality of the steering assist control mechanism detected by the abnormality detection means in said overwrite prohibition storage area when the abnormality is a first abnormality analysis data, and store the abnormality in said overwrite allowable storage area when the abnormality is the abnormality analysis data subsequent to the second time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A controller of an electric power steering apparatus, comprising:
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a steering assist control mechanism comprising an electric motor giving a steering assist force to a steering system; initial abnormality detection means for detecting an abnormality at the operation starting time of the steering assist control mechanism; full-time abnormality detection means for detecting the abnormality in full time after the operation starting time of said steering control mechanism; and abnormality data storage means for storing the abnormality analysis data for analyzing the abnormality in the storage means when the abnormality is detected by said initial abnormality detection means and said full-time abnormality detection means, wherein said storage means comprises initial abnormality and full-time abnormality overwrite prohibition storage areas for prohibiting the overwrite of said abnormality analysis data and the initial abnormality and full-time abnormality overwrite allowable storage areas for overwriting and storing the abnormality analysis data individually corresponding to said initial abnormality detection means and said full-time abnormality detection means, and wherein the abnormality data storage means is constituted to store an abnormality of the steering assist control mechanism detected by said initial abnormality detection means in said initial abnormality overwrite prohibition storage area when the abnormality is an initial abnormality analysis data, and store the abnormality in said initial abnormality overwrite allowable storage area when the abnormality is the initial abnormality analysis data subsequent to the second time, and store the abnormality in said full-time abnormality overwrite prohibition storage area when the abnormality of the steering assist control mechanism detected by said full-time abnormality detection means is an initial abnormality analysis data, and store the abnormality in said full-time abnormality overwrite allowable storage area when the abnormality is the full-time abnormality analysis data subsequent to the second time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification