Why does the urea pump not make noise after a China V vehicle is turned off?
1 Answers
The urea pump not making noise after turning off indicates pump damage. Below are specific details about the urea pump: Introduction: The urea pump is a crucial component of the urea solution injection metering system. Its primary function is to extract urea solution from the urea tank, maintain a certain pressure, and then deliver it to the injection unit to meet the flow and pressure requirements of the injection metering system. Composition and Principle: It mainly consists of a motor, supply pump, reverse pump, switch valve, pressure chamber, throttle orifice, etc. The pump has two operating states: supply and emptying. When supplying liquid to the urea injection system, the motor drives the supply pump to transport urea solution from the urea tank to the pressure chamber. A portion of the urea solution is used for injection, while another portion flows back to the urea tank through the throttle orifice.