Abstract
Based on a plug-in hybrid car equipped with a 1.5L turbocharged direct injection gasoline engine, this paper studies the emission and fuel consumption characteristics of the prototype vehicle under three different cycle conditions, WLTC city, WLTC and CLTC-P. The results show that for the four pollutants: CO, THC, NMHC and NOx, WLTC city cycle emissions are the largest, WLTC cycle emissions are the smallest, CLTC-P cycle emissions are the middle. For N2O, WLTC cycle has the largest combined emissions, CLTC-P cycle combined emissions are the smallest, and WLTC city cycle combined emissions are the center. The combined fuel consumption under WLTC city conditions is approximately 1.3 times the combined fuel consumption under the complete WLTC cycle. The combined fuel consumption under CLTC-P conditions is approximately 1.25 times that of the complete WLTC cycle. The first phase of each cycle is the phase with the highest emissions and fuel consumption.
Highlights
Introduction of different test cycles2.1.1 WLTC test cycle and WITC city test cycleWLTC test cycle is a four-part variable operating conditions test cycle, which is divided into low-speed section, medium-speed section, high-speed section and extra-high-speed section, in which low-speed section duration and time 589 s, medium-speed segment duration 433s,high-speed segment duration 455s, extra-high-speed segment duration 323s, total operating time 1800s, total distance 23.27 km[12]
2.1.2 CLTC-P test cycle Chinese passenger car driving condition (CLTC-P) include low speed (1 part), medium speed (2 parts) and high speed (3 parts) three speed intervals, the whole CLTC-P test cycle conditions total 1800 seconds [13], the operating conditions curve is shown in the diagram: Fig. 2
The ions decomposed in the hydrogen flame form electron flow under the voltage between the plates of the ion absorption electrode, the current size represents the concentration of carbon atoms in the sample gas, so the result of flame ion method (FID) detection is the ppm value of carbon atoms in the sample gas
Summary
With the increase of global car ownership in recent years, the greenhouse effect is becoming more and more severe. In China,The Ministry of Industry and Information Technology, the Ministry of Finance, the Ministry of Commerce, the General Administration of Customs and the General Administration of Quality Supervision and Inspection issued the "measures for the parallel management of the average fuel consumption of passenger car enterprises and the points of new energy vehicles" in 2017. Compared with fossil-fuel-based internal combustion engines, electric energy is generally considered to be cleaner and more efficient, and the actual driving distance of most car users per day is less than 80 km, and the pure electric range of plug-in hybrid vehicles can exactly meet this requirement [10,11]. The pollutants and fuel consumption under three different measuring conditions were compared and analyzed by the control variable method
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