论文部分内容阅读
还POC以公正的地位“共轨系统+DOC+POC”是轻型柴油车在两气门配置、高含硫燃油下满足国Ⅳ标准的有效途径。在目前国内燃油含硫量较高的情况下,DPF会由于硫酸盐颗粒造成阻塞,且无法清除。因此,在国Ⅳ阶段走DPF路线不可行。POC符合中国燃油高含硫、两气门产品为主的国情。如果担心POC在使用一段时间后堵塞,可以检测压差,利用共轨系统的后喷射,清除聚集的碳颗粒。如果担心POC的催化转化效率下降,就应该根据裸机排放和加POC后的排放测试结果,考核POC转化率不超过50%。
Also POC to a just position “common rail system + DOC + POC ” is an effective way for light diesel vehicles to meet the national IV standard under the two-valve configuration, high sulfur fuel. In the current high sulfur content of fuel in the country, DPF will be blocked by the sulfate particles, and can not be cleared. Therefore, it is not feasible to take the DPF route in the stage of China Ⅳ. POC line with China’s high sulfur fuel, two-valve-based national conditions. If you are worried about the POC blockage after use for some time, you can detect the pressure difference, the use of common rail system post-injection, removal of aggregated carbon particles. If you are concerned about the POC catalytic conversion efficiency decline, it should be based on bare metal emissions and emissions test results after POC, assessment of POC conversion rate of not more than 50%.