What Sets the Hybrid Tech of BYD, Geely, Chery & Great Wall Apart?

As the global competition in new-energy vehicles intensifies, China’s domestic automakers are stepping up research and development in plug‑in hybrid electric vehicles (PHEVs). Leading brands like BYD, Geely, Chery, and Great Wall are not just advancing in batteries and motors—they’re locked in a “silent war” over engine thermal efficiency, DHT gearbox architecture, and control algorithms.