Electronic ignition system for internal combustion engine
US3942491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Jan 7, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The crankshaft bears a mark which passes in front of a sensor. When the crankshaft is rotated as the engine turns, the sensor delivers a squarewave signal when this mark passes in front of it. The mark and the sensor are positioned with respect to each other such that when the end of the mark passes in front of the sensor the piston is in a given low position and moves up toward the spark plug and such that when the other end of the mark passes in front of the sensor, the piston has substantially reached its maximum stroke within the cylinder in the vicinity of the spark plug, i.e. when it produces the maximum compression of the combustion gases located in the cylinder. The output of the sensor is connected to the input of a reset circuit of a counter and to the input of a count start and stop circuit of this counter and also to the input of a transfer control circuit. The count input of the counter is connected to the output of a pulse generator, such as a clock, for example, delivering pulses at a given constant frequency. The output of the counter is connected to the input of a buffer memory whose control input is connected to the output of the transfer control circuit. The outp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.