Method and apparatus for measuring piston position in a free piston compressor
US5342176A · kind A · utility
148Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2203/0402
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of measuring the distance at closest approach between the piston of a free piston compressor and the cylinder head. The method derives measurements of both the alternating and average components of piston position from direct measurements of the voltage and current applied to the linear permanent magnet motor that drives the piston, and thus eliminates any requirement for an additional position sensor located within the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.