The thermal efficiency of diesel engines has typically maxed out at around 46%, while gas engines only effectively use 30-36% of the energy available.

The Chinese-made Weichai WP13H diesel engine, unveiled in 2024, broke a record for diesel engine efficiency with 53.09% BTE.

By also adding heat energy recovery systems, Nissan managed to achieve a 50% thermal efficiency, the automaker said, without providing further detail. Such an engine could be used in one of Nissan ...

CHICAGO, Nov. 21, 2022 /PRNewswire/ -- On November 20, 2022, Weichai released the world's first commercial diesel engine with base engine's thermal efficiency of 52.28% and natural gas engine with ...