Drive device for fuel injection device
US11098670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2017 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Sep 7, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount.A control device 150 of a fuel injection device 101 includes a valve 214, a coil 205 which generates a magnetic attraction force to attract a movable member 202 which drives the valve 214, and a voltage source. The fuel injection device 101 applies a voltage to the coil 205 on the basis of an injection pulse, causes a drive current to flow to the coil 205 until the current becomes a maximum current to attract the movable member 202, and drives the valve 214 to inject fuel. The drive current flowing to the coil 205 or a voltage of the voltage source is detected before the injection pulse is stopped. In a case where the detected drive current or the voltage is equal to or less than a setting, a width of the injection pulse or an injection pulse different from the injection pulse is corrected to be long.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.