Method for detecting RPM especially for detecting combustion misfires
US6155105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1999 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is directed to a method for high-resolution rpm detection in a multicylinder internal combustion engine having a crankshaft. Segment times (ts) are detected in which the crankshaft of the engine passes through predetermined angular regions. First corrective values are formed during overrun operation and logically coupled to the segment times (ts) so that deviations of the segment times (ts) of different segments are compensated in the overrun operation. Second corrective values outside of the overrun operation are determined on the basis of the corrected segment times and logically coupled to at least one of the corrected segment times and further processed segment times so that the deviations of the corrected segment times or the further processed segment times are compensated with each other during misfire-free operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.