中文摘要：

在一台加装了电控氢气喷射系统的汽油机上,在发动机1 400 r/min的条件下,对混氢汽油机排放性能进行了试验研究.试验结果表明：适当增加过量空气系数有利于改善混氢汽油机的HC、CO与NOx排放;在理论过量空气系数附近,混氢后发动机CO排放有所升高,但稀燃条件下混氢有利于改善汽油机HC与CO排放;减小点火角后,混氢汽油机HC与NOx排放有所降低;随着进气压力的升高,HC与CO排放得到明显改善.

英文摘要：

This paper experimentally investigates the emission performance of a hydrogen-enriched gasoline engine.The experiment is carried out on a spark-ignited gasoline engine equipped with a hydrogen port injection system at a constant engine speed of 1 400 r/min.Test results show that properly increasing excess air ratio is beneficial for reducing the engine HC,CO,and NOx emissions.CO emission increases with the hydrogen volume fraction in the intake at stoichiometric conditions.However,at lean conditions,the addition of hydrogen is effective in decreasing CO and HC emissions.HC and NOx emissions are reduced with decreasing spark advance.With the increase of the intake manifolds absolute pressure,HC and CO emissions are reduced.