Experimental Investigation about the Effect of Double-Spark Plug Ignition on Combustion Characteristics for Motorcycle Gasoline Engines with a Mild Lean Mixture.

ACS Omega · 2022 · PMC8829854 · PMID 35155927

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

an increasing trendno p-value reported

However, for HC emission, as the speed increases, it shows an increasing trend, reaching the maximum value at about 6000 rpm, which is mainly due to insufficient combustion.

also in 63,971 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.