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(不考虑热及各种非稳定效应时的数学模型及对该模型的探讨) 1 绪言很早以来人们就从提高发动机性能的角度出发,对四行程发动机的进气量进行着种种研究,在使用实验方法量测进、排气系中的脉动、惯性等非稳定效应对进气量的影响,以及在探讨考虑上述非稳定效应的进气量计算方法上都进行了相当详细的研究[1]～[9]。除非稳定效应外,进气量还受热的影响,在这方面人们也进行了大量的研究[10]～[18]。随着电子计算机的发展,可能求解条件复杂的微分方程,因此近来许多人利用这种方法来研究非稳定现象。
(Mathematical model without consideration of heat and various unsteady effects and discussion of the model) 1 INTRODUCTION Since a long time ago people have made various studies on the intake air quantity of a four-stroke engine from the perspective of improving engine performance. Experimental methods were used to measure the effect of instability and other instabilities on the intake air volume in the intake and exhaust systems, as well as on the calculation of the intake air volume considering the above-mentioned unsteady effects [1 ] ~ [9]. In addition to the stabilizing effect, the amount of intake air is also affected by heat, and a great deal of research has been conducted in this area [10] ~ [18]. With the development of electronic computers, it is possible to solve differential equations of complex conditions. Therefore, many people recently used this method to study non-steady-state phenomena.