燃油计量型孔几何正反设计方法研究

针对燃油计量活门特殊型孔的几何型面问题,提出了1种分段分析的设计方法。在已知燃油流量和计量活门位移函数关系的条件下,根据随动活塞和燃油流量的函数关系,利用分段型面设计法进行正向设计,在已知计量活门几何型面的条件下,确定开度与随动活塞位移之间的函数关系,进行反向设计用于计算仿真。结果表明,在计量活门工作范围内,正向设计计算结果与实际数据的最大相对误差小于0.5%,证明正向设计方法具有很高的准确性;通过1组实例对正反向设计进行了相互验证,证明反向设计方法具有工程实用性。

Forward and Reverse Design Method of Fuel Metering Valve Geometrical Profile

This paper proposeed a design method based on segmental analysis to deal with the geometrical profile problem of the fuelmetering valve special hole. Under the condition of known fuel flow and metering valve displacement function, the forward design isperformed using segmental profile design method based on the functional relationship between the follower piston and the fuel flow. Underthe condition that the geometrical profile of the metering valve is known, the functional relationship between the opening degree and thefollower piston displacement is determined, and the reversed design is used to numerical simulation. The results show that the maximumrelative error between the forward design calculation results and the actual data is less than 0.5% within the working range of the meteringvalve, which proves that the forward and reverse method has high accuracy. The forward and reverse design were verified by a set ofexamples to prove that the reverse design has engineering applicability