Ignition timing control apparatus
US5213079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P15/008
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ignition timing control device for an internal combustion engine includes an ignition signal coil for producing a first pulse signal in synchronism with the revolution of the engine and in correspondence to a predetermined crank angle position, a crank angle sensor for producing a second pulse signal in synchronism with the revolution of the crank, the second pulse signal having a greater frequency than said first pulse signal, and a microcomputer for performing an ignition control of the engine by detecting the crank angle on the basis of the first and second pulse signals. The microcomputer is adapted to perform an ignition control by another means when an abnormal state of the crank angle sensor is detected from the second pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.