论述了天然气质量流量计的基本工作原理, 设计了一套由热膜式质量流量传感器和以单片 机为核心的智能化仪表组成的天然气质量流量计, 此流量计适用于压缩天然气汽车的燃料消耗测量和其它用途。 关键词: 压缩天然气汽车; 质量流量; 智能化流量计; 设计 Abstract: Th is paper discu ssed the fundam en tal p rincip le of the natu ral gasm ass f low m eter, and a natu ral gas m ass f low m eter w h ich is con sist of ho t2f ilm m ass f low sen so r and in telligen t m eter w ith a m icro2con t ro ller w as designed, the m eter can m easu re fuel2con sump t ion of CN G veh icles and o thers. 2 tab s, 3 f igs, 6 refs. Key words: CN G veh icle;m ass f low; in telligen t f low m eter; design ing Author resume: WU Ke2gang ( 19582) , m ale, an associate p rofesso r of Chang′an U n iversity, engaged in research of au tomob ile engines.