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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.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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