Electronic control device and abnormality/normality determination method of electronic control device
US11008988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2018 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic control device has a compact abnormality detection circuit that does not require a complicated circuit, and is capable of suppressing a cost increase when being applied a direct injection injector drive circuit and other drive circuits. A current detection circuit includes a current detection resistor, a differential amplifier, and a current detection unit. The current detected is supplied to the abnormality/normality determination unit. A combined resistance value of a diagnostic current drive circuit and the current detection resistor is higher than an injector drive circuit. A fuel injection signal is input to a logic circuit, and a fuel cut signal is input to a different terminal of the logic circuit. The logic circuit's output terminal is connected to the injector drive circuit's gate. The output signal from a fuel injection signal output unit is supplied via a switch to the diagnostic current drive circuit's gate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.