Method for determining segment times between detections of equally spaced markings on a rotating body connected with a camshaft of an internal combustion engine
US6286365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Jun 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/143
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The method for determining segment times (T.sub.k) required for controlling an internal combustion engine includes providing a transducer disk (17) connected to a camshaft of the engine with a plurality of markings equally spaced from each other on the transducer disk; measuring respective segment times (T.sub.k) between detection of corresponding pairs of markings on the transducer disk (17) by means of a camshaft sensor (21); triggering fuel injection events and combustion events in order to trip acceleration events at a substantially constant camshaft rotation speed; determining a resulting acceleration quotient (Q.sub.k) for a current segment time as a quotient of the current segment time divided by a preceding segment time and correcting a following segment time by means of the acceleration quotient (Q.sub.k) for the current segment time. The method is not performed when the internal combustion engine has a crankshaft with a properly working crankshaft sensor for measuring crankshaft rotation speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.