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一、高速化的现状从一些国家来看,汽车用功率最大的非增压直列式六缸四冲程柴油机之一,就是表2中所列的寇明斯 NH-250型发动机。但由于目前生产条件和技术关系,使得该机在重量、与热负荷有关的可靠性以及发动机的长度尚存在一些问题。为了使这种发动机的功率能满足要求,因为在六缸机上增大排量是没有用的,所以采用了增加缸数、增压及提高转速。由于增压并非本文主题,故不述及,而着重论述另两种方
First, the status of the speed From some countries, the car with the most powerful non-turbocharged inline six-cylinder four-stroke diesel engine, is listed in Table 2, the Cummins NH-250 engine. However, due to the current production conditions and technical relationships, there are still some problems with the weight of the aircraft, the reliability related to heat load and the length of the engine. In order to make the power of this kind of engine meet the requirements, it is not useful to increase the displacement on a six-cylinder machine, so the number of cylinders, the pressure increase and the speed increase are adopted. As booster is not the subject of this article, it is not mentioned, but focuses on the other two parties