天燃气重型商用车制造工艺技术流程研究

Research on Manufacturing Process Technology for Gas-Powered Heavy-Duty Commercial Vehicles

为研究天然气商用车与传统商用车(柴油)的能源性质差异,阐述了燃料特性、加注设备成本、常见泄漏情形和商用车污染物及温室气体的排放情况、续航能力等内容,对天然气商用车供气系统气瓶及气路结构、原理进行分析说明,并对国内某重型商用车供气系统布置形式进行分解,制定了天然气重型商用车的装配工艺流程及工艺规范。最后,研究了GB 19239—2022《燃气汽车燃气系统安装规范》的泄漏试验操作规程,参考氮气置换技术,梳理了天然气重型商用车的氮气置换操作规程和天然气重型商用车从装配到入库的生产工艺。

To explore the differences in energy properties between natural gas commercial vehicles and traditional commercial vehicles(diesel),this paper described natural gas characteristics,the cost of refueling equipment,common leakage scenarios,and the emissions of pollutants and greenhouse gases from commercial vehicles,as well as their driving range,then analyzed and explained the gas cylinder and gas route structure and principles of the natural gas commercial vehicle supply system.Arrangement of gas supply system for a domestic heavy-duty commercial vehicle was dissected,and the assembly process and technical specifications for natural gas heavy duty commercial vehicle were developed.Finally,the paper studied the leakage test operation procedures of the GB 19239-2022“Gas Vehicle Gas System Installation Specifications”,and summarized the nitrogen displacement operation procedures and production processes for natural gas heavy-duty trucks from assembly to storage.