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公开(公告)号:US4044739A
公开(公告)日:1977-08-30
申请号:US602313
申请日:1975-08-06
IPC分类号: F16K31/126 , F02M25/07 , F02M25/00
CPC分类号: F02M26/58 , Y10S137/907
摘要: An exhaust gas control valve comprising a diaphragm interposed between an outer upper casing and an outer lower casing of the diaphragm housing, the diaphragm and the upper outer casing defining a first pressure chamber, an inner upper casing attached to the upper surface of the diaphragm within the first pressure chamber, an inner lower casing attached to the undersurface of the diaphragm within the outer lower casing, the inner lower casing and the diaphragm defining a second pressure chamber, a valve housing attached to the bottom of the diaphragm housing and provided with an exhaust gas intake port, an exhaust gas discharge port and a valve seat member disposed in a passage between the exhaust gas intake and discharge ports, a valve head with a stem whose upper end is attached to the center of the diaphragm so that the valve head may be moved toward and away from the valve seat member depending upon the deflection of the diaphragm, the space or chamber defined by the diaphragm and the inner upper casing and the space or chamber defined by the diaphragm and the outer lower casing being communicated with the surrounding atmosphere, and the different negative pressures being transmitted to the first and second pressure chambers, respectively, whereby the quantity of exhaust gases to be recirculated may be controlled depending upon the operating conditions of the engine to minimize the nitrogen oxide (NOx) emission.
摘要翻译: 一种排气控制阀,包括插入在隔膜壳体的外上壳体和外下壳体之间的隔膜,隔膜和上外壳限定第一压力室,内上壳体,其附接到膜片的上表面 所述第一压力室,在所述外部下部壳体内附接到所述隔膜的下表面的内部下部壳体,所述内部下部壳体和所述隔膜限定第二压力室,附接到所述隔膜壳体的底部并设置有 排气进气口,废气排放口和设置在废气进入和排出口之间的通道中的阀座构件,具有杆的阀头,其上端附接到隔膜的中心,使得阀头 可以根据隔膜的偏转,由隔膜限定的空间或室来移动和离开阀座构件 内部上部壳体和由隔膜和外部下部壳体限定的空间或室与周围大气连通,并且不同的负压分别被传递到第一和第二压力室,由此废气的量 可以根据发动机的操作条件来控制再循环以最小化氮氧化物(NOx)排放。