The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2019
Filed:
Jun. 08, 2015
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Satoru Okubo, Hitachinaka, JP;
Kenji Masuda, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
Provided is a power supply breaker circuit diagnosing technique capable of accurately detecting functional failure of a power supply relay of an electronic control device for a vehicular automatic transmission, and capable of reliable transition to a fail-safe state, without requiring a change in the internal configuration of the current electronic control device, and with a minimum of system modification. By utilizing a network communication channel such as a CAN implemented on an electronic control device (ATCU) for a vehicular automatic transmission, and using another electronic control device as an ATCU monitor device, the other electronic control device which is on the monitoring side controls a breaker circuit of the ATCU. The other electronic control device on the monitoring side breaks the breaker circuit of the ATCU for a certain period, and makes a diagnosis by detecting communication loss from the ATCU.