本文介绍了S195型沼气柴油机提高热效率的试验研究成果。论述了功率、燃烧过程和沼气的燃烧特性。分析了影响沼气耗量和热效率的各种因素,提出了改进措施;使双燃料的峰值热效率由26%增至38%以上,最大功率由8.8kW增至10.6kW。同时柴油机的性能也得到改善,显著地提高了发动机的经济性和可靠性。 This article describes the S195 biogas diesel engine to improve thermal efficiency of experimental research. Discusses the power, combustion process and the combustion characteristics of biogas. Various factors affecting biogas consumption and thermal efficiency were analyzed and improvement measures were proposed. The peak thermal efficiency of dual fuel was increased from 26% to 38% and the maximum power increased from 8.8kW to 10.6kW. At the same time diesel engine performance has also been improved, significantly improving the economy and reliability of the engine.