Jianwei Tan

TL;DR: In this article, an experimental study has been carried out on a direct-injection turbocharged diesel engine, where particle-phase and gas-phase PAHs in engine exhaust were collected by fiberglass filters and PUF/XAD-2/PUF cartridges, respectively, and determined by a gas chromatograph/mass spectrometer (GC/MS).

TL;DR: In this paper, two Euro 4 gasoline passenger vehicles (one gasoline direct injected vehicle and one port fuel injected vehicle) were tested over the cold start New European Driving Cycle (NEDC).

TL;DR: In this paper, the characteristics of carbonyl compounds emissions were investigated on a direct injection, turbocharged diesel engine fueled with pure biodiesel derived from soybean oil, and the experimental results indicate that biodiesel-fueled engine almost has triple carbonyls emissions of diesel-driven engine.

TL;DR: Both the emission/FC rates and emission/ FC factors were the highest at accelerations, higher at cruise speeds, and the lowest at decelerations for non-idling buses, and can provide a base reference to further estimate bus emission and FC inventories in Beijing.

TL;DR: The results indicate that considerable discrepancies of engine operating conditions between real-world driving cycles and engine certification cycles have been observed, and it is suggested that specific certified cycle should be developed to regulate bus engines emissions on the test bench or use PEMS to control the bus emissions under real- world operating conditions.