ANALYSIS OF TECHNICAL CHARACTERISTICS, EMISSIONS, AND CHALLENGES IN THE DEVELOPMENT OF DUAL-FUEL LPG/DIESEL ENGINES

Abstract

In the context of the need to reduce emissions and improve fuel efficiency in internal combustion engines, dual-fuel LPG/Diesel diesel engines are receiving significant research attention as a viable transitional solution. This paper presents an overview of domestic and international research on the development trends of dual-fuel LPG/Diesel diesel engines, focusing on analyzing the working principle, technical features and emissions, practical application level, as well as existing research difficulties and gaps. The combined results show that when applying dual-fuel LPG/Diesel, the engine's power and thermal efficiency can be maintained or slightly improved at medium and high loads, while diesel consumption and smoke and soot emissions are significantly reduced. However, CO, HC, and NOx emissions tend to vary complexly, strongly dependent on the LPG ratio and the diesel priming injection strategy. Based on the analysis of quantitative results, the paper identifies research gaps related to combustion control, transient operating modes, and engine durability, and proposes research directions to improve the practical application of LPG/Diesel dual-fuel technology.