Pre-chamber ignition and combustion characterization (PRECISION)

Abstract

In spark ignition IC engines, the increase in compression ratio (CR), in the specific heat (sHR) ratio, and faster combustion usually results in higher brake thermal efficiency. Higher CR and sHR are achievable using lean-burn combustion concepts. Nevertheless, this results in high cyclic variability and potentially high unburned gas emissions. Furthermore, using a high CR often leads to knocking. In this perspective turbulent jet ignition (TJI) is a promising technology that can mitigate these drawbacks. The research project investigates pre-chamber internal ignition and combustion, hot reactive turbulent jet propagation, and main chamber inflammation using different optical test rigs.