چكيده به لاتين
Abstract:
Due to environmental concern and limitation of fossil fuels, reaching efficient and clean combustion for internal combustion (IC) engines is more important than ever. Compression ignition engines are the most efficient inernal combustion engines but because of their high level of emissions, they need to be further developed. Over last two decades, many researchers are investigating methods to meet in-cylinder emission regulations. Many current combustion strategies can be consider as premixed low temperature combustion (LTC). One of these methods is Reactivity Controled Comperation Ignition (RCCI). This consept offer a highly efficient and clean combustion. In this strategy, a low reactivity fuel, such as gasoline, is premixed via port fuel injection (PFI) and a high reactivity fuel, such as diesel fuel, is direct-injected (DI) at multiple times during the compression stroke. One of the disadvantages of this strategy is necessity of using tow fuel tanks. This issue is more important in transportation sector. To solve this problem, we can use a single low reactivity fuel as the premixed fuel and the same fuel blended with a small amount of cetane improver as the DI high reactivity fuel to achieve RCCI combustion. DTBP and 2-ethylhexyl nitrate (EHN) are two of the most widely used cetane improvers in IC engine research. In this study we use isobutanol in port injection and this fuel with small amont of Di-tert-butyl-peroxide in direct injection. We demonstrate that isobutanol with small amont of DTBP behave like diesel fuel. Also we find out that RCCI combustion is sensitive to initial temperature and DTBP percentage.
Keywords: RCCI Engine, Cetan Improver, isobutanol fuel, Reactivity, DTBP
