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SCR技术(选择性催化还原技术)可以将发动机排气中的氮氧化物还原,变为水蒸气和氮气,从而有效改善发动机的排放,而且通过提前点火还可以使发动机更加省油。在欧洲,2000年时专家们估计,一台带有SCR系统和微粒过滤器的发动机所增加的费用在2.2万～3.3万欧元之间,尽管现在专家们对?
SCR technology (Selective Catalytic Reduction) can reduce nitrogen oxides in the exhaust gas of the engine into water vapor and nitrogen to effectively improve the engine’s emissions. Moreover, the engine can be more fuel-efficient by pre-ignition. In Europe, experts estimated in 2000 that the cost of an engine with an SCR system and particulate filter would be between 22,000 and 33,000 euros, although experts nowadays?