Rotational position detecting apparatus
US4262526A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jun 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention discloses a rotational position detecting apparatus for an internal combustion engine for detecting the rotational position of a crank shaft of the engine. The apparatus comprises a rotating disk driven by the engine and giving a large number of angular information signals and also a rotating disk having one reference information on the periphery thereof, an angle sensor for detecting the angular informations on the disk, a rotational reference sensor for detecting the reference information on the disk, waveform reshaping circuits for reshaping the output signals of said both sensors, and an electric circuit for determining the angular position and the reference position from the outputs of said waveform reshaping circuits, wherein a logical product of the reshaped output of the angle sensor and the reshaped output of the reference sensor is implemented, and the time of either one of the rise or fall of an output signal of the logical product is set to be an angular position, while the other one is set to be a reference position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.