Start-Stop系统标定策略对整车油耗及排放影响的试验研究

Study on the Impact of Start-Stop Calibration Strategy on Vehicle Fuel Consumption and Emission

基于NEDC测试循环工况,分阶段研究了起停在不同的标定策略下对排放和油耗的影响。试验结果表明:对于不同的起停功能开启时刻,在高温情况下开启对排放水平有改善,低温情况下开启可以降低油耗水平;低温下怠速停机不利于催化器快速起燃导致排放恶化;低温下重复启动空燃比加浓也影响排放水平。

Based on the NEDC （New European Driving Cycle） test cycle, the influence of the start-stop on the emission and fuel consumption under different calibration strategies was studied. The test results showed that： for the different start-stop function open time, under high temperature conditions to enable start-stop function, the emission level was improved, and at the low tempera- ture condition to enable start-stop function, the fuel consumption was reduced; it is not conducive to the catalytic converter fast ignition at low-temperature idle to enable start-stop, meanwhile it will lead to the bad emissions ; the emission levels will be worse because of the rich lambda factor at the cold restart.