提出了一种适合于车用涡轮增压柴油机实时仿真的压气机特性计算方法，应用方便，计算时间少。对一台6缸增压柴油机压气机特性的实例计算表明，此方法具有较好的计算精度。

介绍了一种新的电控共轨式燃油喷射系统。该系统根据各种液化代用燃料的特殊性质，采用电子控制技术和共轨式喷射原理，能够满足多种液化代用燃料在发动机上应用的要求。同时研究了这种系统的喷射特性，并以柴油为燃料进行了发动机台架试验，验证了系统的可行性。

Liquefied alternative fuels offer great potential benefits in reducing exhaust emissions and improving fuel economy of automotive engines. In order to achieve the best performance of the engine running with such fuels, it is critical to have an appropriate fuel system. In the present work, a new electronically controlled common-rail injection system has been specially designed and tested for the direct injection of liquefied alternative fuels, since a conventional pump-line-injector injection system in the conventional diesel engine was not suitable for the purpose. Experimental work has been carried out to examine and improve matching of the fuel injection system on a new fuel injection pump test bench. The preliminary engine bench test has demonstrated that this arrangement meets the requirement for the operating characteristics of a fuel injection system in a direct injection diesel engine operating with dimethyl ether (DME).

Woody biomass was liquefied by water in an autoclave in the reaction temperature range of 280-420℃with sodium carbonate as the catalyst. The experimental results show that the yield of the main liquefaction product (heavy oil) was significantly influenced by the process conditions. The maximum yield of heavy oil was obtained at reaction temperature 380℃. The heavy oils obtained at different reaction temperature were analyzed by Fourier transform infrared spectroscopy (FTIR) and gas chromatography/mass spectrometry (GC/MS). The analytical results show the heavy oil is complex compound that contain hydrocarbon, aldehyde, ketone, hydroxybenzene and ester.

Alternative fuel engines have widely been developed in the world due to the decrease of oil resources and the strictness of exhaust regulation. This paper introduces the main processes of designing the diesel engine fuelled with coal-bed gas and ignited by spark plug, and analyzes a number of problems considered in processes of designing the engine. As an example, the characteristics of a coal-bed gas engine converted from a S195 diesel engine are introduced, and the performances of the prototype engine are discussed based on the results of engine testing. And some significant conclusions were got.