Effect of Exhaust Gas Recirculation and Spark Timing on Combustion and Emission Performance of an Oxygen-Enriched Gasoline Engine.

ACS Omega · 2022 · PMC9685745 · PMID 36440173

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

a decreasing trendno p-value reported

In an oxygen-enriched atmosphere, CO emissions maintained a decreasing trend as EGR increased. 3.6 HC Emissions Figure 14 shows the HC emissions at different EGR ratios and spark timings.

also in 47,180 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.