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| DVVT对缸内直喷增压发动机性能影响的试验研究 | |
| 引用本文： | 晏双鹤,盛鹏程,王菲,梁春兰.DVVT对缸内直喷增压发动机性能影响的试验研究[J].车用发动机,2012(2):66-69. |
| 作者姓名： | 晏双鹤 盛鹏程 王菲 梁春兰 |
| 作者单位： | 1. 长城汽车股份有限公司动力研究院,河北保定,071000 2. 邢台职业技术学院汽车工程系,河北邢台,054000 3. 河北机电职业技术学院,河北邢台,054048 |
| 摘 要： | 通过对GDI增压发动机进行DVVT扫点试验,研究了DVVT对GDI增压发动机外特性性能、部分负荷燃油经济性和怠速稳定性的影响。试验结果表明:对于试验发动机的凸轮轴型线而言,排气VVT的开启对发动机性能起到负面影响;外特性方面,中等转速工况采用较大的气门重叠角可提高体积效率;高转速采用较小的气门重叠角可提高充量系数;怠速和部分负荷工况下,较小的气门重叠角对改善发动机稳定性有一定帮助。 |
| 关 键 词： | 汽油机 缸内直喷 可变气门正时 气门重叠角 |
Influence of DVVT on In-cylinder Direct Injection Turbocharged Engine Performance |
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| YAN Shuang-he , SHENG Peng-cheng , WANG Fei , LIANG Chun-lan.Influence of DVVT on In-cylinder Direct Injection Turbocharged Engine Performance[J].Vehicle Engine,2012(2):66-69. | |
| Authors: | YAN Shuang-he SHENG Peng-cheng WANG Fei LIANG Chun-lan |
| Institution: | 1.Great Wall Motor Company Limited Power Research Institute,Baoding 071000,China;2.Xingtai Polytechnic College,Xingtai 054000,China;3.Hebei Institute Of Machinery Electricity,Xingtai 054048,China) |
| Abstract: | The DVVT experiments of different working conditions for GDI turbocharged engine were carried out and the influences of DVVT on external characteristic performance,part-load fuel economy and idle stability were researched.The results show that,for the mould line of test engine camshaft,the opening of exhaust VVT has a negative impact on engine performance.For the external characteristic,larger valve overlap angle can increase the volumetric efficiency at medium speed.At high speed,smaller valve overlap angle can increase the charge coefficient.At idle speed and part-load,smaller valve overlap angle is beneficial to improve the stability of engine. |
| Keywords: | gasoline engine in-cylinder direct injection variable valve timing valve overlap angle |
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