| 刘青林,何博,滕勤.高效Atkinson循环TGDI发动机作为传统动力的研究[J].内燃机工程,2017,38(6):131-138. |
| 高效Atkinson循环TGDI发动机作为传统动力的研究 |
| Research on Highly Efficient Turbocharged Direct Injection Engine with the Atkinson Cycle for Traditional Vehicle |
| DOI： |
| 关键词:涡轮增压缸内直喷 阿特金森循环率 几何压缩比 泵气损失 燃烧稳定性 |
| Key Words:turbocharged direct injection（TGDI） Atkinson cycle rate geometric compression ratio pumping loss combustion stability |
| 基金项目: |
|
| 摘要点击次数: 1989 |
| 全文下载次数: 1701 |
| 摘要:基于涡轮增压缸内直喷(TGDI)发动机,采用高几何压缩比和大范围可调的可变气门正时（VVT）机构,选择合适的阿特金森(Atkinson)循环率,在兼顾高负荷动力性的同时降低部分负荷的油耗,以解决阿特金森循环发动机动力性不足的问题。制作样机并进行台架试验,研究了阿特金森循环对发动机换气过程的影响和燃油经济性的改善效果及阿特金森循环对排放和动力性的影响。结果表明：阿特金森循环可以容忍更大的几何压缩比以提升热效率,同时有利于降低部分负荷下的泵气损失并提高低负荷时的燃烧稳定性,可降低油耗、颗粒物排放及高负荷时的爆震倾向；但进气门关闭推迟会严重影响发动机的动力性能,因此需要降低高负荷时的阿特金森循环率并提高增压压力。 |
| Abstract:In order to solve the problem of insufficient power of a turbocharged direct injection engine with the Atkinson cycle, appropriate rates of the Atkinson cycle were selected together with high geometric compression ratio and wide-adjustable variable valve timing (VVT) mechanism to reduce fuel consumption at part load while maintaining power performance at high load. By making prototype and bench test, the influences of the Atkinson cycle on the air exchange process, effect of fuel economy, emissions and power performance of the engine were studied. The results show that the engine with the Atkinson cycle can tolerate a higher geometric compression ratio to improve thermal efficiency. The Atkinson cycle is also helpful to reduce pumping loss at part load, improve combustion stability at low load, and reduce fuel consumption and particulate matter emissions as well as knock tendency at high load. But delayed intake valve closing will seriously affect engine power performance, so it is necessary to reduce the Atkinson cycle rate at high load and increase boost pressure. |
|
查看全文 HTML
查看/发表评论 下载PDF阅读器 |
|
|
|