Cylinder compression detection
US5668311A · kind A · utility
5Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | May 8, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P17/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A compression detection apparatus for determining which one of a pair of phase-opposed cylinders is under compression has a capacitive probe coupled to both ends of the secondary winding of an ignition coil servicing both spark plugs of the pair of cylinders. Phase and magnitude of the voltage signal appearing on the capacitive probe line are processed by a single comparator for determining which on of the pair of cylinders is under compression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.