Weichai Power Co., Ltd.

Yongliang Sun

Dehui Tong

Guangdi Hu

Shaojun Sun

Shenggang Guo

Disclosed are an apparatus and a method for controlling a urea injection system of a diesel engine. The apparatus () comprises: an operation condition parameter acquiring module (), a control quantity determining module () and a drive signal determining module (), wherein the operation condition parameter acquiring module () is configured to acquire operation condition parameters related to the urea injection system, the control quantity determining module () is configured to determine a control quantity for controlling the urea injection system based on the operation condition parameters, a target value of urea pressure in a urea buffer chamber () and a control model designed based on a physical model of the urea injection system, and the drive signal determining module () is configured to determine a drive signal for a urea pump () drive motor () according to the determined control quantity. The method for controlling the urea injection system may achieve accurate control of the urea injection pressure, and reduce a deviation between the urea pressure and a target value of the urea pressure.

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Shandong, China

Yongliang Sun