| 覃文，李临蓬，夏明涛，郑尊清，尧命发，王浒.提高重型柴油机低速高负荷热效率的试验研究[J].内燃机工程,2019,40(5):1-7. |
| Experimental Study for Improving Thermal Efficiency of a Heavy Duty Diesel Engine at Low Speed and High Load |
| DOI：10.13949/j.cnki.nrjgc.2019.05.001 |
| Key Words:diesel engine fuel economy two-stage turbocharger variable geometry turbocharger |
|
| 摘要点击次数: 3585 |
| 全文下载次数: 2517 |
| Abstract:In order to improve the fuel economy of a heavy duty diesel engine at low speed and high load, study on the optimization strategy of intake air system and fuel injection parameters was carried out on a two-stage variable geometry turbocharged heavy duty diesel engine. Results show that in the case of limiting the maximum burst pressure in the cylinder, the turbocharger vane can be adjusted to achieve the lowest fuel consumption only when the pumping loss is substantially zero. Moreover, choosing a right injection pressure can increase mechanical efficiency and improve fuel economy, while reducing NOx emissions and keeping soot emissions low. Based on the optimization strategy proposed in the above study, the influence of maximum burst pressure in the cylinder on the fuel economy under different operating conditions was studied, and the potential of increasing maximum burst pressure in the cylinder to improve fuel economy was further explored. Results show that as speed and load increase, the advantage of increasing the maximum burst pressure limit is more obvious for improving fuel economy. However, after the maximum burst pressure is increased to a certain extent, its effect on improving fuel economy will gradually decrease. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|