Apparatus for identification of cylinders in an internal combustion engine
US6776033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cylinder identifying apparatus has a generator which generates a cylinder discrimination signal, a generator which generates a crank angle position signal, and a control unit which obtains the number of detections of the crank angle position signal, the number of detections of the cylinder discrimination signal, the number of detections of the crank angle position signal at the time of detection of the cylinder discrimination signal, etc. The control unit sets a cylinder discrimination period B35° to B75° CA if the present reference crank position is a first-time detection result after startup, sets a cylinder discrimination period B75° to B75° CA if the present reference crank position is a second-time or some other subsequent detection result, obtains the number of detections of the cylinder discrimination signal, and identifies a cylinder on the basis of the number of pulse dropouts and the number of detections of the cylinder discrimination signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.