There is a worldwide interest in the research of various alternative fuels for automotive engines for the purpose of reduction of CO2 and toxically harmful exhaust emissions. Coal-bed gas, the main component of which is methane, has been considered an attractive alternative fuel for combustion engines due to its abundant resources, high hydrogen-carbon ratios and very low soot formation tendency. The composition of available coal-bed gas, however, can vary considerably, and this has made its combustion stability difficult to control in conventional spark ignition engines. To overcome the problem, a combustion system with a swirl chamber connected to the main combustion chamber through an orifice has been developed for the use of coal-bed gas in spark ignition engines, and the corresponding combustion process has been studied using a developed combustion model involving flame kernel formation and flame front propagation. The combustion model includes two sub-models with the first dealing with the calculation of turbulence intensity history, and the second modeling a jet flow through the orifice of the swirl chamber. Emissions of NOX, HC and CO have been predicted using the combustion model based on an extended Zeldovich mechanism, wall quenching and incomplete oxidation simulations. The effects of various components in coal-bed gas on the engine combustion process and emissions are also investigated. Validation of the combustion model has been performed through comparing simulation data with the experimental result obtained from a relevant single cylinder research engine, and a satisfactory agreement between them has been achieved in terms of combustion parameters and exhaust emissions.

介绍了一种适合二甲醚DME代用燃料的电控 PRVI (泵-轨-阀-嘴)喷射系统，并根据二甲醚的性质特点研究开发了系统电控单元的管理模块、 控制模块和计算机监控系统。通过在油泵试验台上的燃油喷射试验，验证了控制软件的实时性和精确性。

Spark ignition natural gas engines with prechamber, having high thermal efficiency and low exhaust emissions, have been developed due to energy resouces and air pollution problems in recent ten years. A lot of significant results on experiment have been given, but the reports on combustion model were few seen so far. This paper discribles a quasidimensional combustion model for the engines with prechamber. A simulation method for calculating turbulent intensity in cylinder and a submodel for jet orifices between two chambers are put forword. It showed by testing that calculated data showed good general agreement with the correspanding experimental values.

用傅立叶变换红外光谱法对木质生物质在280-380℃水中的直接液化产物进行了研究。研究表明，木质生物质的液化可以分为2个阶段，即纤维素类和木质素类的液化；最终液化产物官能团受温度的影响不大；最终液化产物是复杂的混合物，含有烃、醛、酮、酚和酯等各类化合物。

根据涡流室、主燃室中气体流动过程的质量和能量的交换关系，建立了涡流室式LPG (liquefied petrdeum gas)/柴油双燃料发动机准维燃烧模型的方程，提出了如何使两种不同性质燃料的燃烧在同一个燃烧过程中相互联系、相互作用的燃烧模型。根据模型提供的方程，对缸内燃烧过程和NOx的生成进行了模拟仿真，将其同发动机台架试验的结果进行了验证、分析和讨论。