可变配气正时

哈尔滨应用职业技术学院毕业论文

教务处制

毕业论文项目表

摘要

本文介绍了国内外可变气门技术的发展状况。并根据气门控制参数的变化情况，对可变气门技术进行了详细的分类。结合目前典型的可变气门机构，对实现可变气门技术的途径进行了系统的阐述与评价。通过实例介绍了可变气门技术改善发动机性能及在实现汽油机均质充量压缩着火(HCCI)方面的应用。通过分析指出，叶片式可变凸轮轴相位机构是目前可行性较强的技术途径。

众所周知发动机是靠燃料在汽缸内燃烧做功来产生功率的，由于输入的燃料量受到吸入汽缸内空气量的限制，因此发动机所产生的功率也会受到限制，如果发动机的运行性能已处于最佳状态，再增加输出功率只能通过压缩更多的空气进入汽缸来增加燃料量，从而提高燃烧做功能力。因此在目前的技术条件下，涡轮增压器是惟一能使发动机在工作效率不变的情况下增加输出功率的机械装置。

关键词：可变配气正时；涡轮增压；汽油机

Abstract

This paper introduces the development of variable valve technologies. Control parameters according to changes in valve, variable valve timing technology for a detailed classification. Combined with the current typical variable valve body, the variable valve technology to achieve a systematic approach described and evaluated. Introduced through examples variable valve technology to improve engine performance and in the realization of gasoline homogeneous charge compression ignition (HCCI) in the application. Through analysis that vane variable camshaft phase is the feasibility of a strong body of technical means.

As we all know the engine is fuel combustion in the cylinder by acting to produce power, as the amount of fuel input by the inhalation of limits on the amount of air inside the cylinder, so the power generated by the engine will be limited, if the engine's operating performance has been at its best further increase in output power can only be compressed more air into the cylinders to increase fuel consumption, thereby enhancing the combustion of acting ability. Therefore, the current technical conditions, the turbocharger is the only way the efficiency of the engine without changing the mechanical device to increase power output.

Key words: variable valve timing; turbocharged; gasoline

目录

摘要....................................................................................................................................... I Abstract .................................................................................................................................. II 绪论..................................................................................................................................... I V 第1章配气正时可变技术 (1)

1.1 可变气门正时技术之一：保时捷Carioca (1)

1.2 可变气门正时技术之二：本田VTEC (1)

1.3 可变气门正时技术之三：雷诺—日产CVTC (1)

1.3.1 VVT（发动机可变气门正时技术） (2)

1.3.2 CVVT（连续可变气门正时技术） (2)

1.3.3 DVVT（进排气双连续可变气门正时技术） (3)

第2章发动机配气机构可变技术 (4)

2.1 可变进气系统 (4)

2.2 可变配气机构 (4)

2.2.1 可变配气相位原理 (5)

2.2.2 可变配气相位机构 (5)

第3章三阶段可变气门相位和升程控制系统介绍 (7)

3.1可变配气相位 (7)

3.1.1发动机低速运转 (7)

3.1.2发动机高速运转 (7)

3.2可变气门相位和升程控制系统介绍 (8)

第4章可变气门正时技术的趋势 (9)

结语 (10)

参考文献 (11)

致谢 (12)