天然气汽车的改装与使用

REFIT AND APPLICATION OF NATURAL GAS VEHICLES

由汽油车改装而成的压缩天然气（ＣＮＧ）汽车，保留汽油车的供油系统，增加一套ＣＮＧ储备、供给和控制系统，将只用汽油为燃料的汽车改装成既可用汽油也可用ＣＮＧ的两用燃料汽车。技术性能测试中，有ＣＡ１０Ｂ汽车改装的ＣＮＧ汽车在燃用天然气时，其最大功率和扭矩分别达到燃用汽油时的８５％和９０％以上，而有害物质的排放只有燃用汽油时的１／５左右。在安全可靠性方面，ＣＮＧ的储运和加注均在严格封闭的管道中运行，不易泄漏；ＣＮＧ储运设备的高压系统零部件均留有１．５～４倍的安全系数，储气瓶、减压阀上均安装了安全阀。与此同时，对其操作使用，主要故障及处理方面作了较详细的论述。

Owing to the fact that in the compressed natural gas (CNG)vehicle refitted from the gasoline one,its oil supply system is retained and a set of storage,supply and control systems are increased,the vehicle which the gasoline can be only used as its fuel may be refitted into the bifuel one,i.e.not only the gasoline but also the CNG can be applied.Through technical performance test,it is shown that as regards the CNG vehicle refitted from the CAIOB one,when the natural gas is used as its fuel,its maximum power and torque are respectively 85% and more than 90% those of it,when the gasoline is used,but the former′s harmful substance discharged is only about 20% that of the latter.Its safety and reliability are embodied as follows:the storage,transportation and filling of the CNG are carried out in the seriously sealed pipelines and it is not easy to be leaked out;the safety coefficients of 150%～400% are retained for all the high pressure system parts of the equipments for storing and transporting CNG;and the safety valves are mounted on the gas storage cylinders and pressure reducing valves.In addition,the operation,application and trouble clearing are stated in greater detail.