论文部分内容阅读
(一)引言內燃机的空气消耗量是分析內燃机性能所不可缺少的重要因素,因此它的精確测定是一個十分重要的問题。由于發动机進气門的間歇开閉和活塞的往复运动,進入發动机的空气流成脈动的形式,其流速和压力都迅速地变化,这就使这种空气流的测定成為一个很困难的問題。本文分析了脈动流流速的变化和压力的变化对测量誤差的影响,簡單地綜合了测定脈动空气流的方法,最后介紹了作者所建議的片式黏性流量計的構造特点和設計方法。
(A) Introduction The air consumption of an internal combustion engine is an indispensable factor in the analysis of the performance of an internal combustion engine. Therefore, its accurate determination is a very important issue. Due to the intermittent opening and closing of the intake valve of the engine and the reciprocating movement of the piston, the flow of air entering the engine becomes pulsating and its flow rate and pressure rapidly change, making it difficult to measure this air flow The problem. In this paper, the influence of the change of pulsating flow velocity and pressure on the measurement error is analyzed, the method of measuring pulsating air flow is simply summarized, and the structural characteristics and design method of the proposed chip viscous flowmeter are introduced. .