Valve position detector
US6293303A · kind A · utility
11Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A poppet valve moves up and down in a valve operating mechanism in an internal combustion engine. A fixed electrode is supported on a cylinder head, and a moving electrode is carried by the poppet valve. The fixed electrode is connected to a circuit, which together comprises a variable condenser and a resistance. The valve moves up and down during firing operation of the engine. Variation in electrostatic capacitance is detected by means of the two electrodes, transmitted to the circuit via a lead and a ground connection, and converted to a voltage by the circuit, thereby enabling detecting valve position more exactly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.