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1 概述目前,涡轮增压柴油机的使用越来越广泛,从以前的中、低速柴油机和高速大、中功率柴油机发展到现在的功率在数十千瓦左右的小型柴油机上,这是由于涡轮增压柴油机具有比功率高和有效效率高等一系列优点。但是,采用涡轮增压后的柴油机的运行性能也有许多问题需要克服,共中之一就是柴油机的加速性能和低工况性能,特别是在柴油机启动和低转速时,因废气能量不足增压器转速上升很慢,导致增压压力不足,以致难以提供气缸燃烧所需的空气量,这时就会发
1 Overview At present, the turbocharged diesel engine is more and more widely used, from the previous medium-and low-speed diesel engines and high-speed large and medium-power diesel engine to the current power of tens of kilowatts in the small diesel engine, which is due to turbocharger Diesel engine with high specific power and high efficiency and a series of advantages. However, there are many problems to be overcome in the operation performance of a turbocharged diesel engine. One of the common problems is the acceleration performance and the low working condition of the diesel engine, especially when the diesel engine is started up and the rotational speed is low, due to insufficient energy of the exhaust supercharger The speed rise is very slow, resulting in insufficient boost pressure, which makes it difficult to provide the amount of air required for cylinder combustion,