Based on the measurements and analysis on noise of a certain gasoline engine during high speed it is clarified that two major vibration sources causing engine noise during high speed are timing gear transmission and valve bounce .

通过对某汽油机高速异响噪声的测试和分析表明， 正 时齿轮传动和 气门落座是导致产生高速异响噪声的两个主要激振源。

The switching cam profile variable valve timing ( VVT ) mechanism is able to control valve lifting and timing system through higher and lower intake rockers at different engine speed .

切换凸轮型线 VVT机构通过高、低速摇臂的切换来实现不同转速的 气门升程控制和正时系统。

Recently VVT technology gradually has been applied to the car industry VVT ( Variable Valve Timing ) can achieve the best match to the actual situation of the car it can control the valve ' switch on the actual situation of the engine .

近年来VVT技术逐渐被应用于轿车行业，VVT（VariableValve Timing）即可变正时技术能够和汽车运行的实际情况达到最佳的匹配，它能基于发动机运行的实际情况控制 气门的打开与关闭。

Memory and timing automatic safety gas valve is of valve and household boiler accessory .

记忆 定时自动安全燃气 阀，属阀和家用炉零件类。

Analysis focused on the valve timing of exhaust valve opening time intake valve close time valve overlap angle valve lift and intake system parameters on the performance of the engine .

讨论了 气门 正 时中排气 门打开时刻、进气门关闭时刻、气门重叠角，气门升程和进气系统参数变化对发动机性能的影响。

Development of variable timing valve actuators on automotive engine

车用发动机可变 气门驱动技术进展

The analysis shows that the CFD method could be employed as an effective way of determining valve timing for Variable Valve Timing System Variable Camshaft System and even Non-cam Driven Valve System .

分析过程也表明，内燃机工作过程的CFD分析方法可以成为 VVT系统、VCS系统或非凸轮驱动系统配气 正 时参数确定的一个有效手段。

With the emerging of electro-hydraulic variable valve timing technology the methods of automotive engine valve gas distribution and its scalability have been greatly improved and the fuel economy as well as the power has been greatly magnified .

随着电液可变 气门技术的出现，汽车发动机 气门 配气方式以及可调节性都得到了很大的提高，发动机燃油经济性、动力性也得到了很大的改善。

For same fuel injection the residual HC concentration and the residual ratio have no remarkable variety with retarded injection timing and the combustion in the cylinder became worse when the injection happened after intake valve opening .

喷射相同燃料时，推迟喷射 时刻对于残留HC浓度和残留比例没有明显影响，若喷射燃料发生在进 气门开启之后时，由于燃料与空气混合不良，将导致缸内燃烧的恶化。

Large negative valve timing interval would be beneficial to the improvement of combustion stability under low load whereas and small valve interval was favorable to the stability under high load .

负气门 重叠期增大有利于小负荷的燃烧稳定性，负气 门重叠期减小有利于大负荷的燃烧稳定性。

Some fault as : ignition timing not too thick or thin mixture the distributor platinum valve clearance adjustment screw loose the louder generally necessary adjustment can be eliminated .

有些故障如点火不 正 时、混合气过浓或过稀、分电器白金间隙不合适、 气门调整螺丝松动等造成的异响，一般进行必要的调整即可排除。

That the optimum fuel injection timing corresponding to one operating mode of engine is determined by adjusting the solenoid valve can improve economy and power and lower the emissions of engine .

这样通过调节电磁 阀就可以实现发动机在不同工况下有最佳的供油 提前 角与之匹配，从而达到改善发动机经济性和动力性并降低废气排放之目的。

The effects of five adjusting parameters of valve timing admission valve clearance emission valve clearance rotational speed load rate are interacted .

配气 相位、进 气门间隙、排气门间隙、转速、负荷五个调整参数之间是相互影响的。

Too much valve clearance causes a lag in valve timing causing engine valve train imbalance .

气门间隙过大会引起 气门 调 时延迟，造成引擎 气门组系不平衡。

Through the valve timing calculation for CA15 and EQ6100 engines some main factors influencing the valve timing are analyzed .

通过对 CA15和EQ6100型发动机配气相位的计算，分析了影响 配气相位的主要因素。

The paper introduced the influence of distribution of gas timing on engine dynamics and economics and analyzed the structure and work principle of Mazda changed valve timing mechanism .

介绍配气 正 时对发动机动力性、经济性的影响，阐述一汽马自达6轿车发动机可变 气门正时机构的运行目的，解析其结构与工作原理。

The air-fuel mixing process of three different valve timing are calculated under cold start conditions to analyzes influence of intake valve timing on air-fuel mixing process under this condition .

计算并分析此发动机冷起动工况不同配气 相位下的油气混合过程，以研究不同 进气相位对此工况下的油气混合过程的影响。

The design includes : valve timing and high valve lift confirm valve lift design and cam lift .

凸轮型线设计包括：配气 相位及最高 升程的确定、气门升程设计及其凸轮型线的反求。

Timing hand-grip is moved in axial direction to realize multilevel timing reversing valve is controlled with reversing hand-grip to realize reversing output .

用调速手柄作调速轴向移动，实现多级 调速，用换向手柄控制换向 阀，实现换向输出。

With electronic control this system can have a function of variable valve timing by rotating hydraulically driven intake and exhaust valve sleeves slightly .

通过电子控制技术，对该机构的液压 阀套的角度微调，就能达到可变气门 正 时（ VVT）。

The oil film compensating model cylinder pressure feedback loop control variable valve timing valve lift technology and some new post-treatment mea-sures which are applied in cold starting technology are introduced to improve cold starting emission conditions .

介绍冷起动控制技术中采用的油膜补偿模型、缸压反馈闭环控制、可变 气门 正 时 和 气门升程技术及一些新的后处理措施，以降低冷起动的排放。

Study on Valve Timing and Fast Adjustment of Valve Clearance of Four-Stroke Internal Combustion Engines

四冲程内燃机配气 相位与快速调整 气门间隙的研讨

NOx and CO emission influenced with the change of valve timing at the different maximum opening points ( MOP ) of inlet and exhaust valve are studied in this paper .

文章研究了在不同的进 气门和排气门最大开启点下，NOx和CO排放随 气门 正 时变化的影响。

VVT-i system refers to Variable Valve Timing Intake . It can optimize gas distribution adjust of valve timing .

VVT-i系统是指智能可变气门正时系统，该系统可对配气时机进行优化，调节 气门正时。

This paper analysed the necessity of dynamic valve timing measurement and introduced the principle of the instrument developed by us to measure static and dynamic valve timing .

本文分析了迸行 配气 正 时动态测定的必要性，介绍了我们研制的配气 正 时仪及对 发动机 进行动、静态测定的情况。

Then it is analysed systematically that the technology state of each assemblage of valve mechanism which includes valve group and valve transmission group . Therefore the diagnosis parameters of technology state of valve mechanism which are valve timing and valve clearance are determined .

接着对配气机构气门组、气门传动组各组件的技术状态变化进行了系统分析，从而确定了配气机构技术状态诊断参数配气 相位 和 气门间隙。

An electro-hydraulic drived variable valve timing system of exhaust valve was developed without any change of cylinder head structure and driving mechanism of exhaust valve .

在不改变气缸盖结构和保留原机进 气门驱动机构的基础上，设计了一种电液驱动可变配气 相位的排气 门驱动机构。

The causes of phase variation in air supply obtained after analysis are mainly errors in manufacture abuse in operation and errors in repair . Several adjusting methods for correct installation of timing gears inspection of meshing clearance of gear faces and adjustment of valve clearance are suggested .

分析了配气相位变化的原因主要是制造误差、使用不当和修配误差等，提出了正确安装 正 时齿轮、检查齿面啮合间隙和调整 气门脚间隙等几种调整方法。