Crank angle detecting device for an internal combustion engine
US6889540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Jun 3, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/042
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention has: a crank signal vane in which teeth are provided on a circumference at predetermined crank angles, and a first missing tooth portion having one missing tooth and a second missing tooth portion having two missing teeth are established; a crank angle sensor for outputting a pulse shape crank signal pattern corresponding to the teeth; and an electronic control unit for calculating a crank signal period based on the crank signal pattern, computing a missing tooth identification value based on the calculated crank signal period; detecting the number of missing teeth based on the computed missing tooth identification value, detecting a crank angle reference position for cases in which the detected number of missing teeth is one or two, and identifying a cylinder group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.