Ignition timing control system for internal combustion engine
US4377999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1980 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | May 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An acceleration sensor senses mechanical noise components and a knock signal originating from an internal combination engine. The knock signal is separated from the attenuated noise components and compared with a DC voltage due to the latter to form pulses. After having been integrated the pulses are applied to a phase shifter through a phase shift disabling circuit resulting in retardation of an ignition time in the normal mode of operation of the engine. When the engine is operated in the low speed mode or started, the phase shift disabling circuit applies a null input to the phase shifter in place of the integrated pulses, to ignite the engine at a reference ignition time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.