Fanhua Ma

TL;DR: In this paper, the effect of hydrogen addition on a natural gas engine's thermal efficiency and emission was analyzed using variable composition hydrogen/CNG mixtures (HCNG), and the results showed that hydrogen enrichment could significantly extend the lean operation limit, improve the engine's lean burn ability, and decrease burn duration.

TL;DR: In this article, the effects of hydrogen addition on cycle-by-cycle variation (CCV) in an SI engine was conducted on a 6-cylinder throttle body injection natural gas (NG) engine.

TL;DR: An experimental study aimed at investigating the extension of lean operation limit through hydrogen addition in a SI engine was conducted on a six-cylinder throttle body injection natural gas engine as mentioned in this paper, where four levels of hydrogen enhancement were used for comparison purposes: 0, 10, 30% and 50% by volume.

TL;DR: In this paper, the authors investigated the combustion and emission characteristics of a port-injection SI turbocharged engine fueled with several H 2 / CNG blend ratios (0-50vol%) under various ignition timings.

TL;DR: In this article, the effects of hydrogen addition on the combustion behaviors and cycle-by-cycle variations in a turbocharged lean-burn natural gas SI engine were investigated and it was found that after hydrogen addition the engine's thermal efficiency could keep at relatively high level over a much wider range of equivalence ratios.