Automotive electronic control unit
US11935338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2019 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Mar 20, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/2637
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Generally, the current threshold value is set as a fixed value. Therefore, even in a case where an abnormality occurs in the load and the resistance value is small, when the power supply voltage applied to the load is low, the current value is also low, and falls below the threshold value, and there is a possibility that the overcurrent is not detected. In the present invention, by providing a second detection means that detects a load abnormality by calculating the resistance value of the load from information of the power supply voltage applied to the load, in addition to a first detection means that detects an overcurrent state that indicates the load abnormality using only current value information, it is possible to detect an overcurrent indicating an abnormality of the load even when the power supply voltage applied to the load is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.