摘要:In an engine, two combustion chamber are present in the cylinder. First, the main combustion chamber and the other is called the auxiliary combustion chamber also known as pre-combustion chamber (PCC). The PCC size is small than the main combustion chamber size. In this research, four concept designs are developed for bolted PCC design. CATIA V5 R20 software is used for designing process. After that, Computational Fluid Dynamic (CFD) simulation is used to analyze each type of the bolted PCC powered with natural gas fuel by ANSYS Fluent 16.0 simulation software. Each of the bolted PCC simulation investigated by its flow behavior for the velocity vectors and turbulence kinetic energy (TKE). This PCC can give bigger effect to the engine performance by 10%–15% using natural gas as fuel source.