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介绍了在S1100柴油机基础上扩缸变型而设计的直喷式S1105B柴油机，该机具有价格低、功率大、启动性能好、燃油消耗率低、冷却水消耗量少等特点。概要地介绍了该机主要技术规格、整机性能和零部件设计特点，提出了老产品低成本改造的新思路。
The direct injection type S1105B diesel engine designed on the basis of S1100 diesel engine is introduced. The engine has the characteristics of low price, high power, good starting performance, low fuel consumption and less consumption of cooling water. The main technical specifications of the aircraft, the performance of the whole machine and the design features of the components are briefly introduced. A new idea of low cost transformation of old products is put forward.