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    • 1. 发明申请
    • EXHAUST GAS RECIRCULATION CONTROL VALVE DEVICE
    • 排气回收控制阀装置
    • WO1999020886A1
    • 1999-04-29
    • PCT/JP1997003822
    • 1997-10-22
    • MITSUBISHI DENKI KABUSHIKI KAISHA
    • MITSUBISHI DENKI KABUSHIKI KAISHANUMATA, EijiMIYAKE, ToshihikoKAWASAKI, ShinichiKATO, Yasuhiko
    • F02M25/07
    • F02M26/55F02M26/11F02M26/50F02M26/68
    • An exhaust gas recirculation control valve device, in which wall surfaces at an inlet of an exhaust gas passage are enhanced in anticorrosion against exhaust gases to suppress deposit of fine particules thereto and significantly reduce frequency of maintenance, and which is excellent in assembling quality and inexpensive. The exhaust gas recirculation control valve device comprises a housing (41) having therein an exhaust gas passage (33), a control valve (7) provided in the housing for controlling an amount of exhaust gases circulated in an intake pipe of an engine through the exhaust gas passage, a shield body (42) formed from a material, which is superior to the housing in anticorrosion against exhaust gases, into a cylinder having a valve seat at a tip end thereof, the valve seat abutting against the control valve, the shield body being mounted at an inlet of the exhaust gas passage to cover an inner wall surface of the inlet of the exhaust gas passage, a valve stem (23) connected to the control valve and slidably arranged relative to a slide member press fitted into the housing, a diaphragm (8) mounted to an end of the valve stem and adapted to be actuated by a pressure difference to open and close the control valve, and a negative pressure casing (14) for forming the pressure difference through the diaphragm.
    • 一种废气再循环控制阀装置,其中排气通道入口处的壁表面对废气的防腐性增强,以抑制细小颗粒的沉积,并显着降低维护的频率,并且组装质量和成本低廉 。 废气再循环控制阀装置包括其中具有排气通道(33)的壳体(41),设置在壳体中的控制阀(7),用于控制在发动机的进气管中循环的排气量 废气通道,由材料形成的屏蔽体(42),该材料比在废气中防腐蚀的壳体更好地形成到其顶端具有阀座的气缸中,阀座抵靠控制阀, 屏蔽体安装在废气通道的入口处以覆盖排气通道入口的内壁表面;阀杆(23),其连接到控制阀,并相对于滑动构件压配合到滑动构件 壳体,安装在阀杆的端部并适于通过压差来致动以打开和关闭控制阀的隔膜(8),以及用于通过第th形成压力差的负压壳体(14) e隔膜