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发明公开
CN104246220A 计量装置 失效 - 权利终止

计量装置
摘要：
本发明涉及一种计量阀和一种用于将液态介质引入到机动车的内燃机(1)的废气流中的计量装置(15)。所述计量装置(15)具有用于输送所述液态介质的泵(23)。所述介质通过可借助于电磁铁(65)控制的计量阀(13)被喷射到所述废气流中。所述计量装置(13)包括具有阶梯钻孔(34，34.1，34.2，34.3，34.4)的壳体(33)，其中，在所述阶梯钻孔(34)的区段(34.4)中密封地导向泵套筒(47)。在所述泵套筒(47)的中心钻孔(48)中密封地导向被钻成空心的活塞(49)。在所述低压室(61)中，在活塞(49)上固定有衔铁(69)，并且此外，磁套筒(67)固定在所述壳体(33)上。在所述低压室(61)的与所述磁套筒(67)相对置的一侧上布置有止挡套筒(75)，其中，所述活塞(49)的行程被所述磁套筒(67)和/或所述止挡套筒(75)限界。
摘要（英）：

The present invention relates to a dosing valve and to a dosing device (15) for introducing a liquid medium into an exhaust-gas stream of an internal combustion engine (1) of a motor vehicle. The dosing device (15) has a pump (23) for delivering the liquid medium. The medium is injected into the exhaust-gas stream by means of a dosing valve (13) which can be controlled by way of an electromagnet (65). The dosing device (13) comprises a housing (33) with a stepped bore (34, 34.1, 34.2, 34.3, 34.4), wherein a pump sleeve (47) is guided sealingly in one portion (34.4) of the stepped bore (34). A hollow-bored piston (49) is guided sealingly in a central bore (48) of the pump sleeve (47). In a low-pressure chamber (61), an armature (69) is fastened to the piston (49), and furthermore a magnet sleeve (67) is fastened to the housing (33). A stop sleeve (75) is arranged on a side of the low-pressure chamber (61) situated opposite the magnet sleeve (67), wherein a stroke of the piston (49) is limited by the magnet sleeve (67) and/or by the stop sleeve (75).

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