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Why is the urea pump silent after a China V vehicle is turned off?

1 Answers

ChristianDella

07/29/25 10:38pm

If the urea pump does not make any sound after the engine is turned off, it indicates that the pump is damaged. Below are specific details about the urea pump: 1. 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. 2. Composition and Principle: It mainly consists of a motor, supply pump, reverse pump, switch valve, pressure chamber, throttle orifice, etc. The pump operates in two 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.

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