Apparatus for detecting rotational position of internal combustion engine
US7921699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The rotational position detecting apparatus for an internal combustion engine includes a rotational angle sensor outputting a rotation angle signal indicative of a rotational angle of the internal combustion engine, an in-cylinder pressure sensor outputting an in-cylinder pressure signal indicative of an in-cylinder pressure of a cylinder of the internal combustion engine, and a reference rotational position detecting section which detects a specific rotational angle of the internal combustion engine at which the in-cylinder pressure becomes a predetermined reference pressure under a predetermined running condition of the internal combustion engine, and determines the detected specific rotational angle as a reference rotational position of the internal combustion engine. The reference rotational position detecting section detects the specific rotational angle at least a predetermined number of times, and determines an average value of the detected specific rotational angle as the reference rotational position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.