唐为义

(奇瑞汽车股份有限公司，安徽 芜湖 241009)

摘要：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。

关键词：智能起停；油耗；排放

Abstract: 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 temperature 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.

Keywords: Intelligent Start-Stop; Fuel Consumption; Exhaust Emission