Hitachi Automotive Systems, Ltd.

Kenji Masuda

Satoru Okubo

The present invention detects a battery abnormality during a driving cycle or self-shutdown even when a battery voltage sensor is not mounted. In the present invention, a first storage region is provided with a failure information storage region and a second storage region management information storage region, a second storage region is provided with a failure information storage region and a first storage region management information storage region, and a management information access flag storage region for storing access information indicating a presence or absence of an access to management information of the first storage region and management information of the second storage region is provided separately from the first storage region and the second storage region.

Electronic control device with non-volatile memory

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.

Vehicle-mounted control device or vehicle-mounted control system

Provided is an automotive transmission control device in which a shift range signal can be generated as accurately as possible and control of vehicle travel can be maintained even when a signal input port for a computation device develops a fault. The automotive transmission control device according to the present invention: is provided with three input ports for receiving shift range signals; and provisionally determines the shift range state by the majority decision of the input ports, estimates the shift range state on the basis of the travel state of the vehicle, and performs a final determination of the shift range state by using both the provisional determination and the estimation.

Growing community of inventors

Hitachinaka, Japan

Kenji Masuda