This study proposes a new stratifide charge system for low emission and over lean bum. Combustible mixture was induced around sparkplug using a spherical piston cavity and up-right straight potr in the general method of stratified charge. In this stud...
This study proposes a new stratifide charge system for low emission and over lean bum. Combustible mixture was induced around sparkplug using a spherical piston cavity and up-right straight potr in the general method of stratified charge. In this study, a method of new stratified charge is to use injector-sparkplug. This system injects fuel of extremely small quantities and ignite mixture around sparkplug gap. Injector-sparkplug was fitted in the visualized constant volume chamber. The combustion characteristics was compared with conventional ignition method and this method. We examined combustion pressure and lean misfiring limit, visualized combustion flame according to equivalence ratio.<br/>
As results of this study, in case of using injector-sparkplug, initial flame propagation speed was increased and total combustion period was reduced in the over lean bum in the same equivalence ratio. These phenomena occurred clearly under the conditions of lean equivalence ratio. Furthrmore, the lean misfiring limit of mixture was estended by using the injector-sparkplug.