METHOD PERTAINING TO AN SCR SYSTEM AND AN SCR SYSTEM

    公开(公告)号:EP2828495B1

    公开(公告)日:2018-12-26

    申请号:EP13764635.2

    申请日:2013-03-13

    申请人: Scania CV AB

    发明人: WÄNGDAHL, Johan

    IPC分类号: F01N3/20 F01N11/00

    摘要: The invention relates to a method pertaining to an SCR system which comprises a feed device (230) to supply reducing agent to a dosing device (250) from a container (205) for reducing agent, which dosing device (250) comprises a valve configuration (320) and an expansion section (310) and heating devices (200, 210; 270, 290). The method comprises the step of - warming (s430) said dosing device (250), before the supply of reducing agent to said dosing device (250) is switched off, to such an extent that when reducing agent freezes in said dosing device (250) the freezing process is controlled so that expansion due to the freezing of reducing agent in said dosing device (250) takes place substantially in said expansion section (310). The invention relates also to a computer programme product comprising programme code (P) for a computer (200; 210) for implementing a method according to the invention. The invention relates also to an SCR system and a motor vehicle equipped with the SCR system.