Low cetane number renewable oxy-fuels for premixed combustion concept application : experimental investigation on a light duty diesel engine

摘要: This paper illustrates the results of an experimental study on impact a low cetane number (CN) oxygenated fuel combustion process and emissions light-duty (LD) single-cylinder research engine. In earlier study, it was concluded that cyclic oxygenates consistently outperformed their straight branched counterparts at equal oxygen content with respect to lowering soot emissions. A clear correlation reported linking CN, lower CN fuels leading more favorable levels. It fuel, when realized by adding reactive commercial diesel manifests in longer ignition delays thus premixing. Ultimately, higher degree premixing, turn, thought suppress formation rates. Such compounds have advantage be stable blends fossil boiling point close range, potential produced renewable way from lignin , which has similar hexagonal hydrocarbon basis, albeit polymer form. Lignin is currently widely available second generation biomass waste stream, found for example pulp industry cellulosic ethanol plants. present work, cyclohexanone were tested LD single cylinder engine order evaluate its effects pollutant emissions, employing both conventional (i.e. mixing-controlled) (at medium/high loads) premixed medium/low loads). The suggest combination appears efficiency overall premixed-mode. For mixing-controlled combustion, loads, negative (e.g. retarded phasing) can overcome appropriate calibration injection parameters. high unburnt load, conversely, require further development system design, as well after-treatment device. Finally, realize precise control in-cylinder air-fuel charge, before during future PCCI tailored specific characteristics. this framework, might function enabler engines.