辛烷值对维持汽油机的理想运转起到重要作用。该文用整车转鼓试验，研究了辛烷值对现代汽油车燃油经济性及排放的影响。5辆试验汽车分别采用缸内直喷（gasoline direct injection，GDI）与进气道喷射（port fuel injection，PFI）2种发...辛烷值对维持汽油机的理想运转起到重要作用。该文用整车转鼓试验，研究了辛烷值对现代汽油车燃油经济性及排放的影响。5辆试验汽车分别采用缸内直喷（gasoline direct injection，GDI）与进气道喷射（port fuel injection，PFI）2种发动机和涡轮增压与自然吸气2种技术，采用研究法辛烷值（RON）为91．9～98．4的6种汽油，在新欧洲驾驶循环（NEDC）条件下进行试验。结果表明：采用先进技术的汽车，使用高辛烷值汽油时，节油效果明显：RON每提升1个单位，车辆燃油经济性可提升约1％；辛烷值较高（RON为97）时的汽车获得节油效果约为辛烷值较低（RON为93）时的2倍。提高辛烷值，可不同程度改善排放。展开更多
Emission characterization of particle number as well as particle mass from three diesel passenger cars equipped with diesel particulate filter（DPF）, diesel oxidation catalyst（DOC）and exhaust gas recirculation（EGR...Emission characterization of particle number as well as particle mass from three diesel passenger cars equipped with diesel particulate filter（DPF）, diesel oxidation catalyst（DOC）and exhaust gas recirculation（EGR） under the vehicle driving cycles and regulatory cycle.Total particle number emissions（PNEs） decreased gradually during speed-up of vehicle from 17.3 to 97.3 km/hr. As the average vehicle speed increases, the size-segregated peak of particle number concentration shifts to smaller size ranges of particles. The correlation analysis with various particulate components such as particle number concentration（PNC）,ultrafine particle number concentration（UFPNC） and particulate matter（PM） mass was conducted to compare gaseous compounds（CO, CO2, HC and NOx）. The UFPNC and PM were not only emitted highly in Seoul during severe traffic jam conditions, but also have good correlation with hydrocarbons and NOxinfluencing high potential on secondary aerosol generation. The effect of the dilution temperature on total PNC under the New European Driving Cycle（NEDC）, was slightly higher than the dilution ratio. In addition, the nuclei mode（DP： ≤ 13 nm） was confirmed to be more sensitive to the dilution temperature rather than other particle size ranges. Comparison with particle composition between vehicle speed cycles and regulatory cycle showed that sulfate was slightly increased at regulatory cycle, while other components were relatively similar. During cold start test, semivolatile nucleation particles were increased due to effect of cold environment. Research on particle formation dependent on dilution conditions of diesel passenger cars under the NEDC is important to verify impact on vehicular traffic and secondary aerosol formation in Seoul.展开更多
文摘辛烷值对维持汽油机的理想运转起到重要作用。该文用整车转鼓试验，研究了辛烷值对现代汽油车燃油经济性及排放的影响。5辆试验汽车分别采用缸内直喷（gasoline direct injection，GDI）与进气道喷射（port fuel injection，PFI）2种发动机和涡轮增压与自然吸气2种技术，采用研究法辛烷值（RON）为91．9～98．4的6种汽油，在新欧洲驾驶循环（NEDC）条件下进行试验。结果表明：采用先进技术的汽车，使用高辛烷值汽油时，节油效果明显：RON每提升1个单位，车辆燃油经济性可提升约1％；辛烷值较高（RON为97）时的汽车获得节油效果约为辛烷值较低（RON为93）时的2倍。提高辛烷值，可不同程度改善排放。
基金supported by Transportation Pollution Research Center,National Institute of Environmental Research in Republic of Korea
文摘Emission characterization of particle number as well as particle mass from three diesel passenger cars equipped with diesel particulate filter（DPF）, diesel oxidation catalyst（DOC）and exhaust gas recirculation（EGR） under the vehicle driving cycles and regulatory cycle.Total particle number emissions（PNEs） decreased gradually during speed-up of vehicle from 17.3 to 97.3 km/hr. As the average vehicle speed increases, the size-segregated peak of particle number concentration shifts to smaller size ranges of particles. The correlation analysis with various particulate components such as particle number concentration（PNC）,ultrafine particle number concentration（UFPNC） and particulate matter（PM） mass was conducted to compare gaseous compounds（CO, CO2, HC and NOx）. The UFPNC and PM were not only emitted highly in Seoul during severe traffic jam conditions, but also have good correlation with hydrocarbons and NOxinfluencing high potential on secondary aerosol generation. The effect of the dilution temperature on total PNC under the New European Driving Cycle（NEDC）, was slightly higher than the dilution ratio. In addition, the nuclei mode（DP： ≤ 13 nm） was confirmed to be more sensitive to the dilution temperature rather than other particle size ranges. Comparison with particle composition between vehicle speed cycles and regulatory cycle showed that sulfate was slightly increased at regulatory cycle, while other components were relatively similar. During cold start test, semivolatile nucleation particles were increased due to effect of cold environment. Research on particle formation dependent on dilution conditions of diesel passenger cars under the NEDC is important to verify impact on vehicular traffic and secondary aerosol formation in Seoul.
