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    • 2. 发明申请
    • EXHAUST GAS PURIFICATION APPARATUS FOR ENGINE
    • 用于发动机的排气净化装置
    • US20100005787A1
    • 2010-01-14
    • US12441412
    • 2007-09-14
    • Mitsuru HosoyaYoshihiro Kawada
    • Mitsuru HosoyaYoshihiro Kawada
    • F01N9/00F01N3/035
    • F01N3/2066B01D53/9418B01D53/944B01D53/9477B01D53/9495B01D2251/2062B01D2257/406F01N3/035F01N3/106F01N3/2892F01N11/002F01N13/009F01N13/0093F01N13/0097F01N2610/02F02B29/0425F02B37/00F02D41/0245F02D41/025F02D41/1446F02D41/405Y02T10/24Y02T10/47
    • There is provided an exhaust gas purification apparatus for an engine capable of effectively removing NOx in exhaust gas even when the temperature of exhaust gas is relatively low. The exhaust gas purification apparatus includes a selective reduction catalyst provided in an exhaust pipe, a liquid injection nozzle provided on the upstream side of the selective reduction catalyst, a liquid injecting means capable of injecting a urea-based liquid via the liquid injection nozzle, a controller, and a mixer. The apparatus further includes an ammonia purification catalyst provided on the downstream side of the selective reduction catalyst, a diesel particulate filter provided on the upstream side of the nozzle, an oxidation catalyst provided on the upstream side of the diesel particulate filter, and a temperature sensor for detecting the temperature of the selective reduction catalyst. A fuel injection device is configured so as to be capable of injecting fuel into a cylinder after the top dead center of piston, and when the temperature sensor detects that the selective reduction catalyst has a temperature not higher than a predetermined temperature, the controller controls the fuel injection device so that fuel is injected into the cylinder after the top dead center of piston.
    • 即使在排气温度相对较低的情况下,也能够有效地除去废气中的NOx的发动机的废气净化装置。 排气净化装置包括设置在排气管中的选择还原催化剂,设置在选择还原型催化剂上游侧的液体注入喷嘴,能够经由液体喷嘴喷射尿素液体的液体注入装置, 控制器和混音器。 该装置还包括设置在选择还原催化剂下游侧的氨净化催化剂,设置在喷嘴上游侧的柴油机微粒过滤器,设置在柴油机微粒过滤器上游侧的氧化催化剂,以及温度传感器 用于检测选择还原催化剂的温度。 燃料喷射装置被配置为能够在活塞的上止点之后将燃料喷射到气缸中,并且当温度传感器检测到选择还原催化剂具有不高于预定温度的温度时,控制器控制 燃料喷射装置,使得在活塞的上止点之后将燃料喷射到气缸中。