![The influence of air-fuel ratio on engine performance and pollutant emission of an SI engine using ethanol-gasoline-blended fuels [An article from: Atmospheric Environment]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR4IR2.jpg)
The influence of air-fuel ratio on engine performance and pollutant emission of an SI engine using ethanol-gasoline-blended fuels [An article from: Atmospheric Environment]
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Ethanol-gasoline-blended fuel was tested in a conventional engine under various air-fuel equivalence ratios (@l) for its performance and emissions. The amount of fuel injection was adjusted manually by an open-loop control system using a CONSULT controller. It was found that without changing throttle opening and injection strategy, @l could be extended to a leaner condition as ethanol content increased. The results of engine performance tests showed that torque output would increase slightly at small throttle valve opening when ethanol-gasoline-blended fuel was used. It was also shown that CO and HC emissions were reduced with the increase of ethanol content in the blended fuel, which resulted from oxygen enrichment. At an air-fuel equivalence ratio slightly larger than one, the smallest amounts of CO and HC and the largest amounts of CO"2 resulted. It was noted that under the lean combustion condition, CO"2 emission was controlled by air-fuel equivalence ratio; while under the rich combustion condition, CO"2 emission is offset by CO emission. It was also found that CO"2 emission per unit horse power output for blended fuel was similar or less than that for gasoline fuel. From the experimental data, the optimal ethanol content in the gasoline and air-fuel equivalence ratio in terms of engine performance and air pollution was found.
Description:
Ethanol-gasoline-blended fuel was tested in a conventional engine under various air-fuel equivalence ratios (@l) for its performance and emissions. The amount of fuel injection was adjusted manually by an open-loop control system using a CONSULT controller. It was found that without changing throttle opening and injection strategy, @l could be extended to a leaner condition as ethanol content increased. The results of engine performance tests showed that torque output would increase slightly at small throttle valve opening when ethanol-gasoline-blended fuel was used. It was also shown that CO and HC emissions were reduced with the increase of ethanol content in the blended fuel, which resulted from oxygen enrichment. At an air-fuel equivalence ratio slightly larger than one, the smallest amounts of CO and HC and the largest amounts of CO"2 resulted. It was noted that under the lean combustion condition, CO"2 emission was controlled by air-fuel equivalence ratio; while under the rich combustion condition, CO"2 emission is offset by CO emission. It was also found that CO"2 emission per unit horse power output for blended fuel was similar or less than that for gasoline fuel. From the experimental data, the optimal ethanol content in the gasoline and air-fuel equivalence ratio in terms of engine performance and air pollution was found.
