【摘要】 采用清华大学环境科学与工程系构建的车载排放测试系统对北京市8辆轻型车的实际道路瞬态排放进行测试,分别解析了速度、加速度与排放的数理规律,引入“排放增量”概念,建立一套可用于研究交通流特征对机动车排放影响的轻型车瞬态排放数学模拟模式.验证结果表明,污染物排放总量模拟值与实测值相差±20%以内,瞬态排放速率的模拟值与实测值较接近,体现出排放变化趋势及排放峰值.更多还原

【Abstract】 Adopting an on-board emission measure and test system constructed by department of environmental science and engineering Tsinghua University to measure and test the instantaneous emission of 8 light-duty vehicles in Beijing, and explain the mathematical and physical laws of the emission with speed and acceleration, and the concept of “emission increment” was introduced a mathematical of light-duty vehicles instantaneous emission simulation model, which could be used to study the influences, of traffic characteristics on vehicle emission was established. The difference between the simulated and the measured value of the total amounts of the pollutes emission was within ±20%. The instantaneous emission rates were close relatively to the measured values, displaying the variation trend and the peak of the emission.更多还原