Engine misfire or roughness detection method and apparatus
US5287735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2800/802
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for comparing torsional stress/strain states of a power transmitting member of an internal combustion engine to detect an abnormal combustion condition, including misfire or roughness. A first signal is obtained relating to the torsional stress in the member produced by a first combustion event or series of events. A second signal is obtained which relates to the torsional stress in the member produced by a second combustion event or series of events. The first and second signals are compared to detect the abnormal combustion event in the operation of the engine. A magnetostrictive sensor may preferably be used to obtain the signals relating to the torsional stress in the power transmitting member, such as the engine crankshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.