查询词典 diesel engine

On generator working condition,e xperimental cycles are made on NO x em is sion from a 4135G diesel engine by changin g injection timing and compression ratio , based on technical code on emission of m a rine diesel engine drawm up by Internati onal Maritime Organization.

在保证柴油机的经济性前提下，寻找降低柴油机NOx 排放率的途径，根据IMO《船用柴油发动机氮氧化物释放控制技术规则》推荐的试验程序，对一台 4 135G柴油机在发电机工况下进行改变喷油正时和压缩比的试验研究。

Based on the numeric monitoring and diagnosis system for 6L16/24 typemarine diesel engine, the instantaneous angular speed and the cylinder pressure areapplied to the monitoring and diagnosing of the marine diesel engine through theartificial faults experiments in laboratory. The experiments results show that theintegrated motheds both the instantaneous angular speed and the cylinder pressurecan effectively diagnose the underpower fault of single cylinder, and detects whichcylinder occurs.

5利用船舶柴油机数字化监测诊断系统平台，进行了船舶柴油机瞬时转速和示功图法监测诊断的故障模拟试验研究，研究结果表明：瞬时转速法和示功图法可有效诊断柴油机单缸功率不足的故障，并可定位到故障缸。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

Exhaust brake valve is mainly used on diesel engine vehicle because the compression ratio of diesel engine is bigger, and the deceleration effect is obvious as a air compressor.

排气制动阀主要用于柴油车，因为发动机压缩比较大，作为空压机，其减速效果较明显。

By analyzeing the characteristic of the combustion of the diesel engine, a new method of strengthened combustion for diesel engine is presented.

分析了柴油机燃烧过程的特点，并且提出了一种新的柴油机强化燃烧的研究方法。

Through the analysis of different cross section flow field in cylinder of two-valve and four-valve diesel engine, the following conclusion can be obtained: The formation of intake swirl of two-valve diesel engine mainly is effected by an intense air flow ring zone near the radius from valve axis to cylinder axis, as the flow progresses down through the cylinder, the ring zone air flow expends to both side and finally forms an unified rigid rotating swirl motion.

2号缸盖的螺旋进气道产生的绕自身气门轴线的动量矩比1号缸盖的大，且切向气道的径向速度在前峰面上的数值比1号缸盖的速度数值大很多，因此，两进气道组合后的动量矩损失也大，所以虽然2号缸盖的两个进气道单独的涡流比都高于1号缸盖的两个进气道，但组合后的合成涡流比却是基本相同的。

According to work piece size, characteristic and its material choice cutting specifications; Because of the thick mill diesel engine cylinder body two sides, then the jig design use "two sells the localization at the same time", Manual clamps, an attire clamps processes the diesel engine to be mad the cylinder body two sides; according to will work receives the cutting force to calculate clamps the strength; again according to clamps the strength , choose the determination clamp the special-purpose part.

由于是粗铣柴油机气缸体两侧面，则夹具的设计采用&一面两销&定位，手动夹紧，一次装夹加工柴油机气缸体的两个侧面，保证了加工精度，提高了生产效率；根据工作将受到切削力来计算夹紧力；再根据夹紧力来选择确定夹紧装置的专用部件。

At present, the advance of the diesel engine to more power and lighter weight decreases its stiffness and enhance the vibration of the components, directly affecting the working cycle of the diesel engine.

目前，柴油机正向着大功率、轻重量的方向发展，其刚度不断减小，加剧了部件的振动，直接影响了柴油机的寿命。

Sixth, followed by release of the cylinder high-pressure injector tubing connector on the nut, the governor of diesel engine running under the handle position, rotation of diesel engine, the high-pressure pipeline from the air (this step can be ignored under normal circumstances, when the start failure should not be ignored).

第六，依次松开各缸喷油器上的高压油管接头螺母，将调速器手柄置于柴油机运行位置，转动柴油机，排出各高压油管内的空气（此步骤一般情况下可以忽略，当启动失败时不应忽略）。

This gives a detailed description of the electronically controlled motor vehicle diesel engine widely used in-line pumps, rotor pump plunger distribution, the distribution of home plunger pumps, high pressure common rail pump nozzle and the five types of fuel oil supply system and diesel engine intake, exhaust system The structure principle.

本书详尽地介绍了电控汽车柴油发动机上普遍应用的直列泵、转子柱塞分配泵、对置柱塞分配泵、泵喷嘴以及高压共轨五大类燃油供给系统和柴油发动机进、排气系统的结构原理。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。