Misfiring of the ideal first firingcycle has a strong effect on HC and start-up speed in cold start.
发动机理想的首次着火循环失火对起动时的HC排放和转速影响最大。
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It is also found that the fuel consumption increases with the decrease of firingcycle time, and cutting down the air infiltration will be helpful for saving fuel.
The results show that a proper increase of residual gas fraction could promote ignition and combustion stability of first firingcycle significantly during cold start.