As one of the important parts of large vehicles, the urea tank is equipped with a sensor conversion and ventilation device on the top, and a residual night release screw plug hole is installed at the bottom.
1. Urea solution filling port: used to fill urea solution;
2. Suction pipe joint: connect with the urea pump to supply urea solution to the urea pump;
3. Urea plug: located at the bottom of the urea tank, used to empty the urea solution;
4. Cooling water pipeline joint: introduce engine cooling water for heating the urea tank in winter;
5. Ventilation holes: used to keep the internal pressure of the urea tank in balance with the outside world;
6. Reflux pipe joint: connected to the urea pump for the return of the urea pump;
7. Urea level temperature sensor: used to measure the level and temperature of the urea solution.
Selection of Urea Tank
1. White urea tank
This type of urea tank can facilitate the observation of the urea level. Generally, there is no observation window and no scale line is made on the urea tank. However, the urea in the tank is easily photodegraded.
2. Black urea tank
The urea in this kind of urea tank is not easy to be photodegraded, and the observation hole is adopted on the tank body, which is widely used in the market at present.
Installation of urea tank
The urea tank is generally installed on the same side of the fuel tank, and should be a little closer to the fuel tank to facilitate urea filling. But the two cannot be attached together, because the return of the electronically controlled fuel system will cause a higher temperature in the fuel tank, which may heat the urea and cause changes in the properties of the urea, which will cause the aftertreatment system to fail to work normally. But there are also designs where the fuel tank and urea tank of the vehicle are integrated together.
1. After the urea alarm lamp alarms, the urea solution needs to be filled. First clean the outer surface of the urea filling cap, then use the key to open the urea filling cap, add the qualified urea solution into the vehicle urea tank, and finally tighten the urea filling cap.
2. Unscheduled inspection. If white crystals appear at the vent valve or filling port, rinse with clean water or wipe with a damp cloth.
3. From time to time, check whether the plug-in and pipe joints are in good condition.
4. If the vent valve is found to be clogged, it can be unscrewed, and then cleaned or replaced with clean water.
5. Clean the urea tank once every year: open the screw plug at the bottom of the urea tank for cleaning, so as to release the sediment in the tank.
6. Tap water must not be used to clean the parts of the SCR system, but pure water must be used to avoid contamination of the SCR system.