[특허]Self-diagnosis apparatus for vehicles

Self-diagnosis apparatus for vehicles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-007/70 G06G-007/76
출원번호	US-0605626 (1996-02-22)
우선권정보	JP-0053099 (1993-02-18); JP-0348139 (1993-12-24)
발명자 / 주소	Takaba Katsumi (Obu JPX)
출원인 / 주소	Nippondenso Co., Ltd. (Aichi-pref. JPX 03)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A control unit of a self-diagnosis apparatus for a vehicle includes a CPU and a non-volatile RAM, wherein the CPU has a function of detecting abnormalities occurring in vehicle-mounted devices and of inputting diagnostic data for the vehicle-mounted devices necessary for the analysis of detected abnormalities. In the case of an abnormality occurring in a particular vehicle-mounted device during two consecutive trips, the abnormality is judged to be a final abnormality, whereas an abnormality of the particular vehicle-mounted device detected during the first trip was judged to be only a temporary abnormality. Moreover, updating of the diagnostic data is inhibited for a second abnormality as is subsequent final storage of the diagnostic data for an abnormality occurring in the second vehicle-mounted devices. If a further abnormality of the first vehicle-mounted device is detected again during a second trip, it is judged to be a final abnormality and thus an abnormality code is set in RAM and the diagnostic data is frozen by inhibiting any update of the diagnostic data. If the abnormality of the first vehicle-mounted device is not detected during the second trip, the temporary abnormality is cancelled. Thereby, the present invention makes it possible to more accurate and pertinent store diagnostic data for the analysis of abnormalities in vehicle-mounted devices.

대표청구항 ▼

A self-diagnosis apparatus for a vehicle comprising: abnormality detecting means for detecting whether or not a first abnormality occurs in a first device mounted on said vehicle and whether or not a second abnormality occurs in a second device mounted on said vehicle; diagnostic data detecting means for detecting diagnostic data necessary for analyzing said first abnormality and said second abnormality; abnormality judging means for judging said first abnormality to be a temporary first abnormality when the occurrence of said first abnormality in said first device is first detected, for judging said temporary first abnormality to be a final first abnormality when the occurrence of said first abnormality in said first device has been detected a first predetermined number of times after said judgement of said temporary first abnormality, for judging said second abnormality to be a temporary second abnormality when the occurrence of said second abnormality in said second device is first detected, and for judging said temporary second abnormality to be a final second abnormality when the occurrence of said second abnormality in said second device has been detected a second predetermined number of times after said judgement of said temporary second abnormality, said second predetermined number of times being fewer than said first predetermined number of times, wherein said abnormality detecting means continues to detect for said first and second abnormalities during operation of said abnormality judging means; diagnostic data storage means for temporarily storing diagnostic data detected by said diagnostic data detecting means when said judgement of said temporary first abnormality is made, for finally storing said temporarily stored diagnostic data when said judgement of said final first abnormality is made, for temporarily storing diagnostic data detected by said diagnostic data detecting means when said judgement of said temporary second abnormality is made, and for finally storing said temporarily stored diagnostic data when said judgement of said final second abnormality is made; and diagnostic data storage inhibiting means, for controlling said diagnostic data storage means and functioning from a time when the occurrence of any one of said first abnormality and second abnormality has first been detected, by inhibiting, until said judgement of a final first abnormality is made after said judgement of a temporary first abnormality, final storage of temporarily stored diagnostic data from being made when said judgement of a final second abnormality is made even after the judgement of a temporary second abnormality was made, said diagnostic data storage means finally storing said temporarily stored diagnostic data of said first abnormality after said inhibiting.

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Self-diagnosis apparatus for vehicles 원문보기

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