Optimizing the Exhaust Gas Aftertreatment of Future Agricultural Machinery
Optimizing the Exhaust Gas Aftertreatment of Future Agricultural Machinery
复制标题
优化未来农业机械的废气后处理
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
M. Presti
中科院分区：
文献类型：
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作者：
M. Presti
到目前为止，非道路车辆（非道路移动机械，NRMM）也受到废气后处理的审查。经验告诉我们，这类车辆通常跟随商用车的趋势，只有很短的延迟。主要的挑战是预期的更严格的氮氧化物（NOx）排放限制。加州空气资源委员会（CARB）的CARB第二步建议包括，根据当前FTP冷启动循环，将2024年至2026年商用车辆的氮氧化物排放量从目前的0.1 g/hp∙h降低到0.05至0.08 g/hp∙h。即使车辆安装了选择性催化还原（Selective Catalytic Reduction， SCR）系统，NRMM的大而长的废气系统也会在循环的前600秒排放90%的氮氧化物，即在柴油氧化催化剂（Diesel Oxidation Catalyst， DOC）和SCR系统尚未激活的冷启动阶段，如图1所示。废气全部经过后处理
By now non-road vehicles (Non-road Mobile Machinery, NRMM) have also come under scrutiny for their exhaust gas aftertreatment. Experience tells that this vehicle class typically follows the commercial vehicle trend with only a short delay. The main challenge is the expected more stringent nitrogen oxide (NOx) emission limit. The CARB Step 2 suggestion of the California Air Resources Board (CARB) includes a tightening of the NOx emission of commercial vehicles for the model years 2024 to 2026 from the current level of 0.1 g/hp ∙ h down to just 0.05 to 0.08 g/hp ∙ h based on the current FTP cold start cycle. Even if a vehicle has a Selective Catalytic Reduction (SCR) system in place, the large and long exhaust gas system of a NRMM will emit 90 % of the NOx emissions during the first 600 s of the cycle – in the cold start section when the Diesel Oxidation Catalyst (DOC) and the SCR system are not yet active, FIGURE 1. With all due Exhaust Gas Aftertreatment