In the Gas Injection Diesel Engine (GIDE), the mixture formation process between the injected fuel gas and air plays an important role on combustion and consequently on the engine performance. This paper deals with the characteristics of a transient gas jet as a fundamental study of the fuel gas jet in the GIDE. Helium was injected instantaneously into a quiescent atmosphere with constant injection pressure. The instantaneous distribution of static pressure, velocity and concentration in the jet, which is obtained through the statistical data processing, are discussed to express a transient mixure formation process in the jet. Results are also applied to discuss the ignition and combustion phenomena in the GIDE.
Since 1970's oil crisis, Gasburning Engine is appreciated as an alternate fuel engine and as a keyhard of energy conservation system such as GAS co-generation. Today, there are coming into practical use in the world. Two types of gasburning engine; i.e. spark ignited gas engine and dual fuel engine, are developed by Niigata Engineering Co., Ltd. to meet the above mentioned current. This paper describes a practical knowledge of gas engine performance and combustion characteristics which are acquired by experimental study from developing test, and also introduces three practical use and application, as follows: Engine performance and a combustion characteristics 1) comparison of performance between spark ignited gas and dual fuel engine 2) effect of excess air ratio on both type of engine 3) risk of knocking during changing over on dual fuel engine 4) rated output in case of using alternate fuel gas Practical use 1) spark gas engine for heatpump at a machinery plant 2) spark gas engine for co-generation system using LFG (LAND FILL GAS) 3) dual fuel engine for electric power supply on oil productive platform.