Apparatus for controlling ignition timing in engines
US5871002A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus controls an ignition timing in association with rotation of an engine. The engine has an ignitor, an ignition coil and a spark plug. The ignitor provides the ignition coil with primary current to actuate the ignition coil. The ignition coil provides the spark plug with secondary current to actuate the spark plug when the primary current is cut off. A sensor detects the rotation of the engine by a predetermined angle and outputs a first signal based on the detection. An electronic control unit (ECU) computes an ignition timing of the ignition coil based on the first signal and driving state of the engine. The ECU outputs a second signal to the ignitor to control the primary current provided to the ignition coil. The ECU prohibits a provision of the primary current to the ignition coil when the primary current is provided to the ignition coil for a first predetermined time period. The ECU prohibits the provision of the primary current to the ignition coil based on the second predetermined time period greater than the first predetermined time period, when the engine starts to work.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.