Method and apparatus for measurement of engine ignition timing
US4331029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Jul 8, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for measuring ignition timing of an internal combustion engine wherein angular position of the engine crankshaft is monitored while microwave radiation is injected into a selected engine cylinder. An angular position of the engine crankshaft at an apparent top dead center position of the piston in the selected cylinder is identified as a function of microwave resonances within the cylinder. The angle of piston top dead center position is then compared with an event correlated with ignition at the selected cylinder to determine the ignition angle relative to the piston top dead center position. Ignition timing may then be adjusted to obtain a desired angular relationship between ignition and piston top dead center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.