Gas-Dynamic Interactions between Pre-Chamber and Main Chamber in Passive Pre-Chamber Ignition Gasoline Engines

• DOI: 10.4271/03-17-01-0008
• Publication Date: 2023-09-01T02:15:11Z
• Authors: Tianxiao Yu; Dong Eun Lee; Jay P. Gore; Li Qiao
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 7. Clean energy

<div>Pre-chamber turbulent jet ignition (TJI) is a method of generating distributed sites through multiple high-speed jets in order to achieve an enhanced burn rate the engine cylinder when compared conventional spark plug ignition. To study gas-dynamic interactions between two chambers gasoline engine, three-dimensional numerical model was developed using commercial CFD code CONVERGE. The geometry and parameters used were based on modified turbocharged GM four-cylinder 2.0 L GDI engine. Pre-chambers with nozzle diameters 0.75 mm 1.5 investigate effect pre-chamber charging, combustion, formation. local developments gas temperature velocity captured by adaptive mesh refinement, while turbulence resolved k-epsilon Reynolds averaged Navier–Stokes (RANS) equations. combustion process modeled extended coherent flamelet (ECFM). Data from experiments computed main chamber pressures heat release rates, results show good consistency calculations. scavenging air–fuel equivalence ratio (λ) distribution pre-chambers improved larger nozzle, smaller generated higher velocity, greater kinetic energy, longer penetration length. Moreover, after primary formation, secondary formation observed.</div>