轿车用卡门旋涡空气流量计

Control principle and analysis of Karman vortex air flow sensors used in automotives

为提高轿车燃油经济性、动力性以及排放清洁性,必须严格控制发动机电控燃油喷射系统混合气的空燃比,则必须对进气流量进行测量。本文介绍了一种卡门式涡流空气流量计进气阻力小、体积小、重量轻、反应灵敏、压力损失低、脉动气流测量精度高。

In order to improve the fuel economy, dynamics and clean emission of automotives, the air-fuel ratio of mixture gas in electronic-controlled fuel injection systems of engines must be controlled strictly .So it is necessary to measure the air flow. A Karman-type vortex air flow meter is introduced in this paper, which has many advantages of small intake resistance, small volume, light weight, fast response, low pressure loss, high pulsating- flow measuring precision, wide measuring range and so on.