Research on the effects of idling start-stop function on light vehicles fuel consumption and emission under different cycle conditions

Abstract

The idling distribution characteristics of NEDC, WLTC and CLTC conditions were analyzed, and the exhaust emissions and fuel consumption of three light gasoline vehicles when the idling start-stop function was turned on and off under different cycle conditions were measured. The effects of idling start-stop function on light vehicle fuel consumption and emissions under different cycle conditions were analyzed. The results show that the vehicle fuel saving rate of the idling start-stop function in three cycle conditions is WLTC, NEDC and CLTC conditions from low to high. The idling start-stop function has little effect on vehicle gaseous pollutant emissions. On the whole, the the activation of idling start-stop function increases the THC and CO emissions and reduces NOx emissions.

Methodology to Evaluate CO2 Emissions of Light-Duty Vehicle for Real-World Driving from Multiple Laboratory Testing

“…Wang et al (2020b) found that fuel consumption between WLTC and RDE was at the same level, while the fuel consumption of CLTC-P was 8.41% higher than that of WLTC. Some studies (Geng et al 2021;Ma et al 2021;Yang et al 2021) also have investigated the emission characteristics of different emission control technology routes under the CLTC-P. However, there is still a lack of a large number of test research on CLTC-P, and a uni ed method for quantitatively evaluating CO 2 emissions measured under different test cycles is yet to be established.…”