根据国外超高增压柴油机降低压缩比的实例，论证了低压缩比高增压试验研究工作的必要性，介绍了本研究试验装置的建立、试验台的总布置、试验工况调整方法、试验结果分析及试验达到的水平。在国内首次成功地实现了压缩比低到７，平均指示压力高达２．６２ＭＰａ的低压缩比高增压的单缸模拟试验，也证实了所建立的试验装置是适用的 According to the example of reducing the compression ratio of superhigh turbocharged diesel engine in foreign countries, the necessity of high compression test under low compression ratio was demonstrated. The establishment of the experimental device, the overall arrangement of the test rig, the adjustment of test conditions, the experiment Results analysis and test reached the level. For the first time in China, a single-cylinder simulation test of high compression ratio with low compression ratio was achieved with compression ratio as low as 7 and average indicating pressure as high as 2.62 MPa. It was also confirmed that the established test device was suitable