Lean Methane Mixtures in Turbulent Jet Ignition Combustion System

The development of modern vehicle drives is aimed at reducing fuel consumption (i.e., crude oil) and minimizing the exhaust emission toxic components. One such implementation a two-stage combustion system. Such system initiates ignition in prechamber, then burning mixture flows into main chamber, where it ignites lean mixture. allows efficient mixtures, both liquid gaseous fuels, cylinder. This article proposes solution for internal engines with cylinder capacity approx. 500 cm3. tests were carried out on single-cylinder engine powered by pure methane supplied through double, parallel injection A wide range charge ignitability requires use an active chamber containing injector spark plug. n = 1500 rpm three load values (indicated mean effective pressure, IMEP): 2, 4 6 bar. All these constant value center (CoC), 8 deg CA. approach resulted timing being control signal CoC. As result conducted research, was found that increase load, which improved inter-chamber flow, allowed leaner mixtures without increasing coefficient variation, CoV(IMEP). achieved ? 1.7 acceptable level non-uniformity operation, CoV(IMEP) < 8%. engine’s indicated efficiency when using reached about 42% 1.5 (which percentage points more than conventional 1.0).