Method for monitoring the operating condition of an engine valve system
US7383799B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Mar 23, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system is provided for monitoring changes in the operation of a valve system of an engine. An accelerometer provides vibration-related signals that are obtained by a microprocessor or similarly configured device and compared to a reference or baseline magnitude. The obtaining step can comprise the steps of measuring, filtering, rectifying, and integrating individual data points obtained during specific windows of time determined as a function of the rotational position of the crankshaft of the engine. These windows in time are preferably selected as a function of the position of exhaust or intake valves as they move in response to rotation of cams of the valve system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.