# Comparative analysis of different valve timing control methods for single-piston free piston expander-linear generator via an orthogonal experimental design

> Research article (Energy, 2020) · cited 45× · AI/ML

**Wikidata**: [openalex:W3000271016](https://www.wikidata.org/wiki/openalex:W3000271016)  
**Source**: https://4ort.xyz/entity/comparative-analysis-of-different-valve-timing-control-methods-for-single-piston-free-piston-expander-linear-generator-v