Modular position controller for variable valve timing
US4909194A · kind A · utility
13Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Jul 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable valve timing system utilizes a closed-loop control for controlling the valve phasing wherein the closed-loop control receives a command input from the engine ECU. The command input is a pulse width modulated waveform that is synchronized with engine TDC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.