Method for achieving an elevated charge of an ignition capacitor in a capacitive type ignition system
US4907562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1988 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Nov 18, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for achieving elevated charging of an ignition capacitor in a capacitive type ignition system for internal combustion engines. When starting a cold engine or when starting the engine under other conditions in which the battery capacity is low, activation of the engine starting motor will result in a drop in voltage in the electric system serving both the starting motor and the ignition system. The voltage drop in the electrical system will vary sinusoidally synchronously with the crankshaft rotation, owing to the fact that the starting motor will momentarily subject the electrical system to higher loads when the pistons are located adjacent their top-dead-center position L in the compression stroke. The method solves this problem, by delaying the re-charging of the capacitor until a position is reached in which the voltage drop in the electrical system has its lowest value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.