Engine control system of marine outboard engine
US4794897A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Nov 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system of a marine outboard engine has an oscillator which operates in response to an abnormality signal resulting from detection signals from an oil level sensor and a temperature sensor, and in response to a signal from a tachometric sensor to transmit normal and retarded ignition signals alternately and repeatedly to a firing timing control circuit, which thereupon controls the engine ignition with normal firing timing when receiving the normal ignition signal and with retarded firing timing when receiving the retarded ignition signal. The engine power output under retarded firing time is lower than that under normal firing timing, whereby the engine emits an abnormal humming sound, warning the operator that an abnormal condition has occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.