engine. Meanwhile, the HC emissions were averagely decreased by 80% under the pure DME mode. The instantaneous CO and NOx … emissions from the SI DME engine were slightly increased in the initial seconds after the onset of cold start and then markedly … could improve the combustion and emissions performance. …

opened throttle position and control the engine torque only by adjusting the excess air ratio. Toxic emissions including HC …

largest drop of HC emissions was nearly 50% compared with the original methanol engine at stoichiometric condition. However …, CO and NOx emissions increase with the addition of DME. …

in the intake of 0 and 3% were adopted to investigate the effect of hydrogen addition on combustion and emissions …