SCR DOSING SYSTEM
    1.
    发明申请
    SCR DOSING SYSTEM 审中-公开
    SCR加药系统

    公开(公告)号:WO2017129420A1

    公开(公告)日:2017-08-03

    申请号:PCT/EP2017/050650

    申请日:2017-01-13

    Abstract: The invention comprises a method for purging a selective catalytic reduction dosing system (10) having a urea reservoir (11), a urea delivery module (12) comprising at least one pump (23, 24, 33, 43), a dosing injector (15) arranged to spray urea into an engine exhaust pipe and a feedline (26, 36, 46). The method comprises: (1) activating a reverse pump (23)/ a pump in a reverse direction (33, 43); (2) opening the dosing injector (15); (3) stopping the reverse pump (23)/ reverse direction of the pump (33, 43) and closing the dosing injector (15); (4) activating a forward pump (24)/ a forward direction of the pump (33, 43); (5) stopping the forward pump (24)/ forward direction of the pump (33, 43) and opening the dosing injector (15); and (6) activating the reverse pump (23)/ reverse direction of the pump (33, 43). The invention also extends to a selective catalytic reduction dosing system (10).

    Abstract translation: 本发明包括用于净化具有尿素储存器(11)的选择性催化还原剂量给料系统(10)的方法,包括至少一个泵(23,24,33)的尿素递送模块(12) ,43),布置成将尿素喷射到发动机排气管和供给管线(26,36,46)中的计量喷射器(15)。 该方法包括:(1)以反方向(33,43)启动反向泵(23)/泵; (2)打开定量注射器(15); (3)停止泵(33,43)的反向泵(23)/反向并关闭定量注射器(15)。 (4)启动泵(33,43)的前进泵(24)/前进方向; (5)停止泵(33,43)的前进泵(24)/前进方向并打开定量注射器(15); 和(6)启动泵(33,43)的反向泵(23)/反向。 本发明还扩展到选择性催化还原剂量系统(10)。

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