活塞

According to FEM analysis of the piston and research of parameters, two optimum projects are determined.

根据对活塞的有限元分析和对各参数研究，活塞优化确定了两个方案。

Some innovative approaches were presented to resolve the problem existing in the first generation of boost compressor by increasing the flow area of fluidics nozzle to decrease pressure drop and erosion attack, adding a new flow path in order to improve boosting effect of the second piston bore, connecting a bypass valve in parallel with throttle valve to set a partial flow and regulate pressure drop.

针对第一代样机存在的问题，提出了改进措施：①增加射流元件喷嘴过流面积来降低压耗和冲蚀破坏；②在射流元件输出道与二级活塞缸之间增加新流道，提高二级活塞缸增压效果；③在节流阀位置并联旁通阀进行分流稳压。

Thus, through analysis and research, evaluation system and method of the piston inclination of Wiggins gasholder has been proposed, which lays the foundation for design and implementation of the online monitoring system of the piston inclination of gasholder.

为此，本文通过分析研究，提出了威金斯型煤气柜活塞倾斜度评价体系与方法，从而为煤气柜活塞倾斜度在线监测系统的设计和实施奠定了基础。

It is also used for grass cutter, blowmobile, mini tractor and so on.

能有效防止发动机活塞磨损，降低活塞、燃烧室、排气口结焦。

These dies are made from cast iron with steel inserts for the gudgeon pin holes and the cores.

这些模具组成部分应用了铸铁材质，而中空和活塞销孔部分的抽芯应用了钢材质，这些抽芯可以保证活塞销和内孔部分的部位形状。

The utility model characterized in that the syringe's (2) inner wall, the parts at the back end of the syringe's (2) jaw opening, is a subuliform ring blocked, and the handspike's (4) outer wall, the parts close to the back end of the handspike(4), is heaved to the inside with more than two pieces of wing panels matching to the subuliform block ring.

本实用新型提供了一种一次性注射器，由针头（1）、针筒（2）、活塞（3）、推杆（4）组成，针筒（2）前端的乳头上套装连接着针头（1），推杆（4）前端连有活塞（3），其特征在于针筒（2）后端开口处的内壁上设有锥形挡环（5），在靠近推杆（4）后端处的推杆（4）外壁上设有与锥形挡环（5）相配合的向针筒（2）内壁凸起伸出的两支以上的翼片（6）。

The effect of piston heating temperature on the piston assembling of 4125 diesel engine has been studied.

试验研究4125柴油机活塞加热温度对装配性的影响，从而降低了装配活塞的加热温度，节约了电能，改善了装配性。

By the time he finished with our little Honda, the cylinder was overbored 1mm and re-plated to 79mm by Millennium Tech, Parapros Racing custom ported the head, CP Pistons threw in a high-compression 14:1 piston and Hot Cams slipped in their performance camshaft.

的时候，他几乎没有完成我们的本田，气瓶是overbored一毫米和再镀以79毫米的千年技术， Parapros赛车定制移植的头部，处长活塞扔在一个高压缩14点01分活塞和热的Cams下滑的性能凸轮轴。

Numerical simulation by Matlab for the new hypocycloid energy transformation mechanisms was done by means of the four-order Runge-kutta's method. The result shows that the simple harmonic and rectilinear motion of piston in the new mechanism make the engine working more stable. The peak acceleration is around 25% lower in the new mechanism than that in the conventional slider-crank mechanism. And the output speed is much higher at the same identical mean effective pressure and same load torque. And then the output power of the engine is improved.

基于四阶Runge-Kutta法，运用MATLAB进行了仿真验证，结果表明，新型内摆线能量转换机构的活塞做完全简谐直线运动，运动更加平稳；活塞加速度峰值比传统曲柄滑块机构小25%；在相同的气缸平均等效压力和负载转矩下，具有较高的输出转速，提高了内燃机的输出功率。

With the computing software MATLAB,the authors make a numerical evaluation of the velocity of the piston wind in an interzonal tunnel,analyze the influences of the train speed, the length of the tunnel, the length of the train and the blockage ratio to the piston wind.

隧道中活塞风速度的计算方法主要有两种：按恒定流计算和按照非恒定流计算。列车在隧道中的行驶所形成的活塞风实际上是随时间而变化的。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。