Maintenance system for fuel vehicle

The utility model discloses a maintenance method for a fuel vehicle. The maintenance method comprises the following steps: preparing a methanol hydrogen production device; the methanol hydrogen production device is connected with a gas inlet of a fuel engine of the fuel vehicle; starting the fuel engine and enabling the fuel engine to operate in an idling state; hydrogen prepared by the methanol hydrogen production device is input into the fuel engine and is combusted in the fuel engine so as to remove foreign matters in the fuel engine and form emissions; the discharge is discharged from the fuel engine. Hydrogen maintenance is adopted, an engine of the fuel vehicle is not damaged, the effect is good, the fuel efficiency is improved, and carbon dioxide emission is reduced. 本实用新型公开了一种燃油车养护方法，包括如下步骤：准备甲醇制氢装置；将所述甲醇制氢装置与所述燃油车的燃油发动机的进气口连接；启动所述燃油发动机并令其处于怠速状态运行；所述甲醇制氢装置制备的氢气被输入到所述燃油发动机并在所述燃油发动机内燃烧以去除所述燃油发动机内的异物并形成排出物；所述排出物从所述燃油发动机排出。本实用新型采用氢气养护，不伤害燃油车的发动机，效果好，提高燃油效率，减少二氧化碳排放。