EXHAUST AFTERTREATMENT SYSTEM AND METHOD FOR OPERATING THE SYSTEM
    1.
    发明公开
    EXHAUST AFTERTREATMENT SYSTEM AND METHOD FOR OPERATING THE SYSTEM 有权
    后处理系统及其操作方法HIS

    公开(公告)号:EP2795076A1

    公开(公告)日:2014-10-29

    申请号:EP11878074.1

    申请日:2011-12-23

    IPC分类号: F01N3/20 F01N9/00

    摘要: The object of the present invention is to provide an inventive exhaust system (6) for receiving an exhaust gas. The exhaust system (6) comprising a first SCR catalyst (10) and a second SCR catalyst (16) positioned downstream of said first SCR catalyst (10). A first injector (44) is provided upstream of said first SCR catalyst (10), and a second injector (64) is provided upstream of said second SCR catalyst (16). The exhaust system (6) further comprising a gaseous ammonia supply device (40) being fluidly connected to said first injector (44) for supplying gaseous ammonia to said exhaust gas by said first injector (44), and an ammonia-containing reductant reservoir (60) being fluidly connected to said second injector (64) for supplying a fluid ammonia- containing reductant, such as urea, to said exhaust gas by said second injector (64). The first SCR catalyst (10) having a smaller volume than said second SCR catalyst (16) for a fast warm-up of said first SCR catalyst (10).

    APPARATUS FOR AN INTERNAL COMBUSTION ENGINE
    6.
    发明授权
    APPARATUS FOR AN INTERNAL COMBUSTION ENGINE 有权
    装置用于内燃机

    公开(公告)号:EP1521898B1

    公开(公告)日:2011-05-11

    申请号:EP03733762.3

    申请日:2003-06-18

    发明人: UDD, Sören

    IPC分类号: F01L1/12

    摘要: The invention relates to an apparatus for controlling valve movements in an internal combustion engine which has at least one inlet valve (12) and at least one exhaust valve for controlling the connection between the combustion chamber in the cylinder and an inlet system and an exhaust system respectively. A rotatable camshaft which has a cam curve comprising a rising ramp (10a) and a falling ramp (10b) is designed to interact with a valve mechanism (14) for actuation of the inlet or exhaust valve (12) under the action of a valve spring (13). The valve mechanism (14) comprises control members (21-25, 26) which allow the return movement of the valve mechanism to be controlled during the closing phase of the inlet valve (12) or the exhaust valve, independently of the falling ramp (10b) of the cam curve. The control members (21-25, 26) are arranged so that the closing of the valve can be delayed for an adjustable period of time by means of a hydraulically adjustable force counteracting the closing force of the valve spring.