Parametric Analysis of the Combustion Cycle of a Diesel Engine for Operation on Natural Gas

The publication research task is related to one of the solution aspects in reference decarbonization transport by transferring operation diesel engines natural gas. results converted into with dual-fuel (D-NG) without significant constructive modifications are focused on forecasting energy efficiency parameters in-service engine models and evaluation reserves improvement. This paper presents characteristics combustion cycle methodological optimization high-speed 79.5/95.5 mm a conventional fuel injection system. Interrelations between indicated (?i), performance (excess air ratio (?), compression (?), degree pressure increase cylinder (?), maximum (pmax), (pk), temperature (Tk) after compression, etc.), heat release were determined researched. Directions when operating wide range load (pmi) modes also obtained: low low-load mode due reduced dynamics (combustion time increased up 200° CA). main influencing factors for ?i pilot-injection portion phase (?inj) ?, ? was inefficient. To avoid exceeding permissible limits reliability pmax, realized reserve estimated as 10%. Methodological tools practical application parametric analysis conversion have been developed adapted form numerical modeling algorithm, which presented nomogram form. For improvement initial specific identification, accurate methods must be used. proposed methodology seen theoretical tool has benefit use fast industrial field.