n. 体积效率；组装体积效率
Valve timing is a major factor in achieving good volumetric efficiency.
定时阀是实现高容积效率的一个主要因素。
When the load is serious unbalanced, each sub-channel still keeps high volumetric efficiency and equal flow.
在各油缸支路出现严重负载不平衡时，仍保持高容积效率和相同流量。
The effect of residence time on ethanol yield, residual sugar, ethanol productivity and reactor volumetric efficiency were stu***d.
研究了停留时间对乙醇产量、残糖量、乙醇生产能力和反应器效率的影响。
Using the meshing principle, we raise computer-simulated generation method and compare volumetric efficiency with other kind of claw type dry vacuum pump.
根据啮合原理，提出了计算机模拟创成方法并同其它爪型干式真空泵的容积利用系数做出了比较。
A sliding vane compressor has many dominant advantages such as ****** construction, no eccentric rotary parts, small size, and high volumetric efficiency etc.
滑片压缩机结构简单紧凑、运转平稳、容积效率高，目前其应用领域越来越广。
Presented in this paper is the relationship between intake pressure wave actions and the general volumetric efficiency speed characteristics of multi cylinder engines.
本文论述的是根据台架试验及模拟计算结果得出的多缸发动机进气系统内压力波动与充气效率-转速特性的关系。
This paper introduces the effect of connecting pipe length of the flow measurement system on volumetric efficiency and torque characteristic of gasoline engines.
本文介绍了节流式流量测量系统外接管长度对汽油机充量系数和扭矩特性的影响。
Since scroll compressor has neither suction valve nor clearance, its volumetric efficiency is 90-98%, while that of reciprocating compressors is only 65-75%.
没有吸气阀，没有余隙容积容积效率可以达到90%-98%，而多缸活塞式压缩机容积效率只有65%-75%。
The test method of pressure loss, flow loss and frictional force loss etc. of the hydraulic pumping units is presented, from which the mechanical efficiency and volumetric efficiency are obtained.
给出了测取液压抽油机系统压力损失、流量损失以及油缸的摩擦力损失等的方法，并由此求出系统的机械效率与容积效率。
The test results showed that, without obvious increase of volumetric efficiency, this system is able to make obviously change to the particulate and NOx emission.
结果表明，该系统在不影响进气充量系数的情况下，可以明显改变柴油机微粒和氮化物的排放量。
In this paper, the influences of compressor speed and work condition on compressor volumetric efficiency were analyzed based on experiment under automotive air-conditioning conditions.
针对汽车空调压缩机的特点，在实验的基础上，分析了转速及工况对压缩机输气系数的影响；
The test results show that, without obvious increase of volumetric efficiency, this system is able to make obvious change to the exhaust gas emission of ***sel engine.
试验结果表明，该系统在不影响进气充量系数的情况下，对柴油机有害气体排放量影响显著。
All along, there are fewer researches on the suction volumetric efficiency of heavy caliber piston pump and they are behind the needs of production development.
一直以来，对大口径活塞泵吸入容积效率的研究较少，滞后于生产发展的需要。
The DA Feeder introduces material into the conveying system at highest volumetric efficiency when material flow into the feeder is controlled to permit free venting.
当流进供料机的材料可自动排空时，DA供料机可最大程度的将材料引入运输系统中。
Besides, the equation used to predict the volumetric efficiency was given for variable speed reciprocating compressors.
拟出适合于转速变化时的输气系数计算公式，可供估算变转速压缩式的输气系数。
Adequate inlet valve to prevent throttling of the incoming air, with the consequent loss of volumetric efficiency.
配置足够的进气阀的面积以防止因进来的气体在节流过程中所产生的容积效率的损 失。
Whether the design of air valve is reasonable or not will directly influence air compressor's volumetric efficiency and working reliability.
气阀设计是否合理将直接影响空压机的容积效率和工作可靠性。
Finally the calibration on a WF4C27F-E gasoline engine is performed, and the MAP graphs of the volumetric efficiency and the spark advance angle are obtained.
最后针对WF4C27F-E汽油机进行了标定试验，获取了充量系数和点火提前角MAP图。
Axis-direction clearance influences the volumetric efficiency and the torque efficiency of pneumatic vane motor.
轴向间隙影响着叶片式气动马达的容积效率和机械效率。
For intake system, adopting the resonant intake manifold construction, make use of the intake motive effect to increase volumetric efficiency;
对于进气系统，采取谐振进气的结构措施，利用进气动力效应来提高进气充量；
The adverse circumstances of filed work, incorrect operation and maintenance delayed often cause component destroyed and make the volumetric efficiency low down.
可控震源在野外工作的环境恶劣，再有非规范性操作或不及时进行系统维护等情况，就会造成系统元件的损坏。
It has characteristics of small size, low noise and working smoothly; further more, its volumetric efficiency is first rank in the displacement compressor domain.
涡旋压缩机具有体积小，噪音低，运行平稳的优点，特别是容积效率更是比其他类型压缩机有着明显的优势。
Dividing the actual flow by the theoretical value calculated above will yield a value which, taken as a percent, indicates volumetric efficiency.
实际流量除以理论流量得出一个数值，以百分比计，表示的即是容积效率。
When compression ratio is increased, the volumetric efficiency is increased, giving a fast burning rate and thus high thermal efficiency and power output.
压缩比增加，发动机充量系数增加，燃烧速率加快，热效率提高。
Volumetric efficiency of a new claw type dry vacuum pump was introduced.
介绍了一种新型的特殊爪型干式真空泵的容积利用系数。
The volumetric efficiency of C-SB series of Scroll Compressors was investigated experimentally.
实验研究了C-SB系列涡旋式压缩机的输气效率。
体积效率（Volumetric Efficiency）是衡量内燃机或流体机械在特定工况下气体吸入或排出能力的关键参数。其定义为实际进入气缸的气体体积与理论最大填充体积的比值，通常以百分比表示。例如，一台汽油发动机在标准大气压下若达到90%的体积效率，则表明其实际吸入气体量为理论容积的90%。
该参数受多种因素影响，包括进气系统阻力、气体温度、发动机转速及气门正时。根据《内燃机原理》（清华大学出版）分析，高转速下气体流动惯性增强可能短暂提高体积效率，但摩擦损失会抵消部分增益。涡轮增压技术通过预压缩进气显著提升体积效率，戴姆勒集团实验数据显示，增压系统可使柴油机体积效率突破100%。
在航空工程领域，美国联邦航空管理局（FAA）发布的《活塞发动机维护手册》强调，海拔升高导致的空气密度下降会直接影响活塞发动机的体积效率，需通过可变桨距螺旋桨进行补偿。工业压缩机领域，阿特拉斯·科普柯公司研究表明，优化阀片启闭时序可使往复式压缩机体积效率提升8%-12%。
volumetric efficiency（体积效率）是工程和物理学中描述系统实际处理流体体积与理论最大处理能力比值的术语，具体解释如下：
指在特定条件下，系统实际处理的流体体积与理论最大可能处理体积的比值，通常以百分比表示。其计算公式为： $$ eta_v = frac{text{实际体积流量}}{text{理论体积流量}} times 100% $$
内燃机
表示发动机气缸实际吸入的空气量与理论容积的比值，受气门正时、进气道设计等因素影响。例如，优化气门定时可提升容积效率（）。
液压系统
指泵或马达的实际流量与理论流量的比率，泄漏会导致该效率显著下降（）。
石油工程
在油藏开发中称为“体积波及系数”（volumetric conformance efficiency），描述驱油剂在储层中的波及范围（）。
该术语在不同领域的具体含义可能略有差异，例如：
如需更专业的定义，可参考机械工程手册或流体力学教材。
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