Ignition coil control device for regulating the optimal conduction time for an internal combustion engine
US4469081A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1981 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Oct 29, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P3/0456
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An output stage of a calculator (2) has a transfer function of the form: tc=N.TSD+.epsilon. where .epsilon. is a small and known quantity; t.sub.c is the conduction time of the coil, N is a number of angular fractions or periods of an interpolation signal; and TSD is the period corresponding to one tooth on the starter gear. The device comprises measurement means (1, 32, 36) for measuring the time strictly necessary to obtain the required energy; means (6, 9, 13, 17) for generating signals at each fraction of the angular marking signal in order to obtain a time measurement of a counting window and means (21, 25, 29) for counting and memorizing during this window an interpolation signal of the angular resolution n times higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.