正时齿轮

用常规拉具拆卸隔环和正时齿轮。

Remove spacer ring and timing gear with a conventional puller .

从正时齿轮罩上拆卸专用齿轮拉拔器及接头工具。

Remove the special gear puller and adapter tools from timing gear cover .

安装凸轮轴正时齿轮之间的短导轨。

Fit the short guide rails between the camshaft timing gears .

拓扑优化技术在降低正时齿轮罩辐射噪声中的应用

Design of Low Noise for Timing Gear Cover Based on Topology Optimization

正时齿轮啮合间隙减小的原因分析及防止措施

Reason analysis and precautionary measures of engagement clearance reduction of timing gear

柴油机正时齿轮降噪措施

Technologies for Noise Reduction from Diesel Timing Gear

奥贝球铁汽车正时齿轮应用研究

Study and Application of ADI Autotruck Timing Gears

有关详细信息，请参见拆卸和安装凸轮轴正时齿轮-“安装”章节。

For details see removing and installing camshaft timing gear-chapter on " installing " .

机油会从正时齿轮盖和后主轴承油封处压出。

Oil may be forced out through the timing cover and rear-main bearing oil seals .

油底壳与正时齿轮盖油封

Oil pan timing case cover seal

在正时齿轮室盖的结构设计中，增强刚度和降低重量是相互矛盾的。

In the structure design of gear chamber casing , strengthen rigidity and reducing weight were contrary .

钻头和铣刀是汽车发动机正时齿轮罩加工中应用的最为广泛的刀具。

The use of drills and milling cutter is becoming more and more widespread in engine manufacturing .

对员工的奖金实行上不封顶，下不保底油底壳与正时齿轮盖油封

There will be no ceiling or floor in giving Bonuses to the employees Oil pan timing case cover seal

重点介绍了喷油提前角的提前原理，点火正时齿轮的传统动模式，提前角的计算公式及其调整步骤，从而真正达到了简洁实效的目的。

This paper introduces the principle of injection timing advance , transmission mode of timing gear , calculation formula of timing advance and its adjusting steps .

计算和试验结果显示油底壳、缸体、正时齿轮盖是该机最主要的辐射噪声源。

Those all suggested that the ultimate main source of radiation noise is the drain pan , the cylinder block and the time modifying gear shell .

应用结果表明：对于进排气门、正时齿轮和悬架装置等承担疲劳载荷的零部件，激光焊接可满足其较高的强度要求；

The application results show that laser welding can meet higher strength stress demands for those fatigue load parts , such as intake and exhaust valves , timing gear , suspension equipment .

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。

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 .

针对DF7型机车柴油机正时齿轮与双联大介轮啮合间隙减小这一故障，分析了其产生的原因以及可能造成的危害，并制定了防止该故障发生的措施。

The reasons of reduction in engagement clearance between timing gear and big dual idle gear of DF_7 locomotive diesel engine and the probable resulting damages were analysed , and the measures to prevent this fault from occurring were proposed .

通过试验研究找到了发动机的主要噪声源是排气噪声、活塞&正时齿轮噪声和配气机构噪声。对排气噪声、发动机机械噪声和配气机构噪声进行了深入的理论分析；

It is discovered by experiment that the principal noise sources are the exhaust noise , piston-timing gear noise and the noise of distribution mechanism The exhaust noise , mechanical noise of the engine and the noise of distribution mechanism are analyzed theoretically .

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。

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 .

运用可靠性优化设计理论，推导出在齿轮强度、应力均服从对数正态分布时的齿轮接触疲劳强度和齿根弯曲疲劳强度的可靠度计算公式。

Using the theory of reliability design , this paper deduces the calculational equations about reliability of the tired strength of the bear surface contact and the tired strength of the bear bottom bend while its strength and strain both obey the normal state distribution of logarithm .

而将正时机构由正时齿轮传动改为同步齿形带传动，可以大大改善前端测点的500Hz以上中、高频辐射噪声。

Changing the drive of timing mechanism from timing gear to notched belt can greatly reduce the high and medium frequency ( higher than 500 Hz ) radiated noise at front measuring point of the engine .