NDLI: Study on effect of fuel switch process on transient emissions for LPG engine

Content Provider	IEEE Xplore Digital Library
Author	Ying Gao Fang Yonglei Li Jun Zhu Changji
Copyright Year	2011
Description	Author affiliation: State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Chang Chun, China (Ying Gao; Fang Yonglei; Li Jun; Zhu Changji)
Abstract	Due to the difficult cold start for LPG engine, most of LPG passenger cars adopt gasoline auxiliary start and automatically switch to LPG after engine warm-up. Therefore, the optimized fuel switch conditions are critical to the development of LPG passenger car meeting with National Emission IV legislation. This paper presents the effects of coolant temperature, engine speed and torque on the switch process by means of lots of experiments. The results show that they bring the transient fluctuation of excess air coefficient during switch process. Thus the fluctuation amplitude and duration have direct impact on engine tailpipe emission. If the excess air coefficient fluctuation amplitudes go beyond the high conversion efficiency window of three-way catalyst, the engine's transient emission deteriorates. Above all, the proper control of the excess air coefficient fluctuation amplitude is significant to lower engine emission during fuel switch process.
Starting Page	5384
Ending Page	5387
File Size	338348
Page Count	4
File Format	PDF
ISBN	9781424480364
e-ISBN	9781424480395
DOI	10.1109/ICEICE.2011.5776953
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power machinery and engineering Fluctuations LPG Fuel switch Switches Emission Silicon Transient analysis Engines Petroleum Engine
Content Type	Text
Resource Type	Article

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