On-board motor vehicle timing measurement system
US4707791A · kind A · utility
7Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P17/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Engine timing measurement apparatus receives the engine gear tooth signal, sensed combustion, and a crankshaft index (CI) of top dead center (TDC). The apparatus includes a whole tooth interval counter for providing a whole number count of each complete tooth interval, and partial tooth counters for counting incomplete tooth intervals as the ratio of clock pulses counted in a present incomplete tooth interval divided by clock pulses counted in a preceding complete tooth interval, the partial count added to the whole count to provide a decimal value indicative of engine timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.