Combustion of Gaseous Alternative Fuels in Compression Ignition Engines

Abstract

The problem of alternative fuels for combustion engines has been growing in importance recently. This is connected not only with decreasing fossil fuel resources, but also with the growing concern for the natural environment and the fight against global warming. This paper discusses the possibility of utilizing alternative gaseous fuels in compression-ignition engines, using dual-fuel, gas-liquid operation strategy. Current state of the art of this technology had been introduced, along with its benefits and challenges to be countered. The discussion had been supported by authors own research experience on dual-fuel engines. The latest results of research on the impact of gas composition on combustion process in the Common Rail dual fuel engine had been presented, at the same illustrating the environmental benefits of using gaseous fuels. The Utilization of gaseous fuels with varying composition was illustrated systematically, starting with natural gas. The possibility of using fuels with lower content of methane (the so-called low-calorie gases) was shown by the impact of depleting natural gas with carbon dioxide. Industrial gases, such as syngas contain a large amount of hydrogen, carbon monoxide or higher hydrocarbons (ethane, propane). The possibility of fueling CI engines with these gasses was presented by the influence of enriching natural gas with mentioned components. The results cover engine dynamometer tests for different operating conditions with the analysis of the combustion process and detailed emission measurements discussion. The results of experimental studies were supplemented by simulation results, using mathematical models, developed by the authors for multi-fuel enginesr.

Emissions From a Medium-Duty Crdi Engine Fuelled With Diesel-Biodiesel Blends

“…The set of directly measured engine parameters was used for calculation of the two efficiency parameters: brake-specific fuel consumption and brake fuel conversion efficiency. The detailed descriptions of the test stand as well as the methodology of the measurement and calculation of the analyzed parameters have been reported previously in [36][37][38]. Engine tests were conducted at two rotational speeds: n= 1500 and 3000 rpm.…”

Possibilities of enhancing the environmental safety of diesel vehicles using alternative fuels

“…Для організації робочого процесу дизелів на газових паливах використовуються такі способи: займання робочої суміші за допомогою електричної іскри та використання запальної дози дизельного палива [4][5]. Найбільшого розповсюдження отримав, так званий, газодизельний процес -займання основної газоповітряної суміші від запальної дози дизельного палива.…”

Influence of the distance between gas injector and intake valve on combustion indicators and NOx emission in dual fuel ci engine

“…The conversion of monofuel CI engine to dual fuel requires change of regulation parameters [Mikulski et al 2016]. Different injection strategies of CI engine and indicated significant differences in early flame propagation under change of diesel injection parameters have been analysed [Pielecha et al 2012].…”