Yun Gu

Research of Biogas as Fuel for Internal Combustion Engine

The component, physical & chemical characteristics of biogas and the problems of engines running on it are introduced briefly in this paper. The two main steps that are diesel injection ignition and fast-burning system, which are used to solve the problems of the low burning velocity, serious back burning, high exhaust temperature and severe heat charge for biogas engines are expatiated. Then the authors develop two kinds of biogas engines: biogas-diesel dual fuel engine generators and spark-ignition biogas engine generators. The authors also put forward to use biogas as the fuel for vehicle by purified and compressed.

Research and Development on Small Pipeline Natural Gas Generator

A 5 kW gasoline generator was converted into gas generator that could run on pipeline natural gas. A fire-restrain device and pressure reducer are designed to ensure safety. The measures such as increasing the compression ratio, enlarging spark advance and using a high-energy ignition are taken to improve the performance of the engine running on gas. Experiment has been done to compare the performances of the generator running on gasoline or natural gas. The result shows that the emission and economy of the generator are better when it runs on natural gas than that on gasoline.