Study on Idle Start-Stop on Fuel Consumption under NEDC, WLTC and CLTC-P

The idle start-stop system is a widely adopted energy-saving system on the passenger car. This study compared the three legal conditions of NEDC, WLTC and CLTC-P, and analyzed the difference in their characteristics as running cycles. Furthermore, the fuel consumption performance of the idle start-stop system is examined under these three legal cycles using fuel consumption simulation software and real vehicle verification. The test results demonstrate that the characteristics of CLTC-P closely resemble actual road driving conditions in China. The fuel-saving effect of the idle start-stop system under CLTC-P is significantly better than that of WLTC and NEDC. Therefore. it is recommended to evaluate other energy-saving devices under CLTC-P.