对一辆汽油车在海拔环境模拟舱内进行0、1520和3030m海拔下的排放和油耗测试,结果表明,随着海拔的升高,空气密度降低,车辆行驶阻力减小,汽油车节气门开度和点火提前角增加,排气温度降低,车辆冷起动时的排放恶化,但油耗降低；海拔3030m处,车辆CO、THC和NOx 排放增加了17.8%,8.4%和29.7%,油耗降低9.5%。%The emission and fuel consumption of a gasoline vehicle at an altitude of 0m, 1 520m and 3 030m above sea level are tested in an altitude simulation chamber. The results indicate that with the rise of alti-tude, the air density decreases, the resistance of vehicle reduces, the opening of throttle and the advanced angle of ignition timing increase, the temperature of exhaust gas lowers, the cold start emissions deteriorate, but the fuel consumption drops. At an altitude of 3 030m the emissions of CO, THC and NOx increase by 17.8%, 8.4% and 29.7% respectively while the fuel consumption reduces by 9.5%.
展开▼
