本文介绍了由作者研制成功的固定真空式汽化器的工作原理、结构特点及与半吨车用发动机的配套试验情况. 此类汽化器结构简单、经济性好并能改善排污.目前,欧、美、日等国已有很大发展,我国尚未生产.本文旨在介绍、推荐此类汽化器,期望能眷在我国推广使用,为我国汽车工业的发展,发挥一定的作用. This paper introduces the working principle, structural characteristics and matching test of semi-ton engine with fixed vacuum carburetor developed by the author.It has the advantages of simple structure, good economy and better sewage disposal.At present, Japan and other countries have great development, our country has not yet produced.This paper aims to introduce and recommend such carburettor, expected to be able to promote the use of our country, for the development of China’s automobile industry, to play a certain role.