Valve opening and closing timing control device
US11300016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2021 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve opening and closing timing control device includes a drive-side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, a driven-side rotating body that rotates with a camshaft of the internal combustion engine, an electric motor that controls a relative rotation phase of the drive-side rotating body and the driven-side rotating body, a motor control unit that controls a current supplied to the electric motor, a current sensor that detects the current flowing into the electric motor, a regulation unit that determines a regulation phase in which the relative rotation phase is mechanically limited in an advanced angle direction and in a delayed angle direction, and a regulation phase detection unit that detects the regulation phase based on when the relative rotation phase in which a change is stopped by the regulation unit is reached and a current value detected by the current sensor increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.