Urea tank heating system and vehicle

Abstract

The invention discloses a urea tank heating system and a vehicle. The urea tank heating system comprises a urea tank, an engine and a valve control assembly, wherein an engine water jacket is arrangedin the engine, a water inlet pipe and a water drainage pipe are arranged between the urea tank and the engine water jacket, water in the engine water jacket can enter the urea tank through the waterinlet pipe, and the water in the urea tank can return to the engine water jacket through the water drainage pipe; and the valve control assembly is arranged on the water inlet pipe and the water drainage pipe, and the valve control assembly is arranged to be used for switching the waterflow direction between large circulation and small circulation, wherein the large circulation is characterized inthat the water in the engine water jacket passes through the urea tank, and the small circulation is characterized in that the water in the engine water jacket does not pass through the urea tank, and therefore the circulation mode is changed. According to the urea tank heating system, switching between the large circulation and the small circulation of a water path can be carried out through control of the valve control assembly so that the urea tank can be heated in winter, while the urine tank does not need to be heated in other seasons; and furthermore, the water pressure balance in a pipeline can be maintained, and the phenomenon of pipeline burst is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a urea tank heating system and a vehicle. Background technique [0002] In order to ensure the normal use of the urea injection system in winter, the vehicle uses the water in the engine water jacket to heat the urea tank. For this reason, two water pipes are connected between the engine and the urea tank to form a water circuit, and the urea tank is heated by the engine coolant. heating. The urea tank does not need to be heated all year round. In winter, the urea tank needs to be heated, and in other seasons, the temperature of the urea tank is sufficient and does not need to be heated. Therefore, traditional vehicles install a water cut-off solenoid valve in the water inlet pipe to control the coolant. On and off, the solenoid valve is closed in seasons other than winter. However, the engine water pump has a certain pressure, and the solenoid valve is closed for a long time,...

AI Technical Summary

Problems solved by technology

However, the engine water pump has a certain pressure, and the solenoid valve is closed for a long time, which will easily cause the internal pressure of the water pipe between the engine water outlet and the solenoid valve to be too high, and the water pipe will burst, causing damage to the vehicle and affecting the normal use of the vehicle. There is room for improvement.

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