Technical Paper
CFD modeling of conventional and pre-chamber ignition of a high-performance naturally aspirated engine
2024-04-09
2024-01-2102
The abatement of carbon dioxide and pollutants emissions on motorbike spark-ignition (SI) engines is a challenging task, considering the small size, the low-cost and the high power-to-weight ratio required by the market of such powertrain. In this context, the passive pre-chamber (PPC) technology is an attractive solution. The combustion duration can be reduced by igniting the air-fuel mixture inside a small volume connected to the cylinder, unfolding the way to high engine efficiencies without penalization of the peak performance. Moreover, no injectors are needed inside the PPC, guaranteeing a cheap and fast retrofitting of the existing fleet. In this work, a 3D computational fluid-dynamics (CFD) investigation is carried out over an experimental configuration of motorbike SI engine, operated at fixed operating conditions with both traditional and PPC configurations.