US 12,447,914 B2
Vehicle-mounted control device
Naomichi Yamaguchi, Hitachinaka (JP); Yuta Tanaka, Hitachinaka (JP); and Jin Sato, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/286,261
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Jan. 27, 2022, PCT No. PCT/JP2022/003128
§ 371(c)(1), (2) Date Oct. 10, 2023,
PCT Pub. No. WO2022/254780, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2021-091066 (JP), filed on May 31, 2021.
Prior Publication US 2024/0042951 A1, Feb. 8, 2024
Int. Cl. B60R 16/023 (2006.01); G01R 31/54 (2020.01)
CPC B60R 16/0232 (2013.01) [G01R 31/54 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A vehicle-mounted control device that is supplied with a drive voltage from a voltage source via a GND line and drives a plurality of electric loads, the device comprising:
a voltage monitoring unit that measures a voltage of the voltage source to be supplied to the electric load;
a current monitoring unit that measures a current flowing through the electric load;
a driving unit that adjusts an energization amount of the electric load;
a current cutoff determination unit that determines whether to cut off the current flowing through the electric load by the driving unit; and
a disconnection identification diagnosis unit that identifies between disconnection failure of the electric load and disconnection failure of the GND line, wherein
the disconnection identification diagnosis unit identifies between the disconnection failure of the electric load and the disconnection failure of the GND line according to the voltage of the voltage source measured by the voltage monitoring unit when the current cutoff determination unit determines to cut off the current flowing through the electric load.