柴油机电控燃油动力系统外文文献翻译、中英文翻译、外文翻译
Design of Diesel Engine Electronic Fuel Control System
1.EUP Control Method
The engine control unit is the most important component of the fuel n timing control system。ensuring the n control required to achieve the minimum XXX of the camshaft n。which is a measurement parameter of the crankshaft。XXX。The micro speed regulator (MCU) is controlled by the timer structure module (CTM) and the timing processing unit (TPU)。When the timer structure module is interrupted by the camshaft trigger。the control component responds accordingly to the fuel supply system。and the centralized maintenance module detects a XXX signal to the timing processing unit (TPU)。If there are Z teeth。the span is 360o/z。
The pulse control unit is issued by the PSP and PMM。The PSP has two working modes: angle-angle and angle-time。In the angle-angle working mode。the output pulse of the rising
edge and falling edge is independent of each other。In the angle-time working mode。the output pulse of the falling edge depends on the rising edge。and its control parameters are ANGLE1 start angle and ANGLE1 end angle。The n time is controlled by two parameters of EUP。The n time depends on the n n of these two parameters。We use the angle-angle working mode to control the engine n.
Figure 1-1 Logic control circuit XXX.
XXX the control n of the XXX。For example。if the distance is 10CA。the result is 0.1CA。The XXX:
t = 360/z
N1 = (tD-θi)/(t-1)
ri = (tD-θi)t/(128t)
N2 = (tD-θi+θd)/(t-1)
r2 = (tD-θi+θd-N2t)/(128t)
controller翻译中文2.EUP Research
2.1 XXX
The start n of a fuel n delay is controlled by the driving signal issued by EUP。and the XXX in a short d of time。which is called n delay。EUP is a complex control system composed of electronic units。XXX。this delay is trivariate。This means that the design of the control system XXX the driving pulse。The delay is controlled by a XXX on the high-pressure oil pipe。such as shown in Figure 2-1.The fuel n time is controlled by the injector。and the delay is tested at different engine speeds。expressed in delay angle。The curve of the engine at higher speeds is nonlinear。and the slope of the curve at lower speeds is greater.
Figure 2-1 n Delay Waveform
2.2 XXX
XXX XXX time depends on the pressure change and the fuel。Because the latter depends on the relief valve and formula 2-1:
m=CdA2ρ(P-PC)
2-1)
其中，Cd是燃油回流系数，A是表面积，P是出口或出口前的输出压力，PC是燃料在装有可调节弹簧的空值杆上的作用力。当发动机转速升高到一定压力时，监测口处的操纵杆上的力保持不变，以较高的比率反馈到燃料模块上。另外，管内的压力滞后会使发动机长时间高速运转，从而使燃油回流增加。在图2-2中，燃料喷射量与燃料供给角、高转速的最低位置的计算、燃料喷射持续时间成线性关系，并且大于对低速的要求。mfc是每个喷射循环的喷油量。
图2-2发动机转速与喷射量图
喷油定时是控制发动机燃料经济性和动力性的关键。有效的喷油时间是燃料时间滞后一个供给角。单位压力燃油泵的变化率可以表示为式2-2：
p=βT(1/dmdh)+AρV(dtdt)
2-2)
其中，βT是燃料弹性模量，h是喷油量的增量，AP是燃油管的体积和横截面。喷油量的上升速度会影响压力的变化。使用一个斜率为常数的凸轮轴作为驱动轮，燃料供给角的增加量则开始线性变化。从图2-3中可以得到燃料喷射量是线性增加的，这条曲线在不同的喷射时间下不会改变。
图2-3喷油时间与喷油量
在一个四气缸的涡轮增压柴油机上完成了测试工作。超高压喷射系统的EUP可以满足欧洲II排放标准，有的甚至可以满足欧洲III排放标准。喷射系统EUP的校准工作是非常重要的，其关键部分是喷油时间，即燃料的经济性和动力性。在1300r/min。32N/m的工况下进行试验得到了这些数据。从喷射角开始，在燃油经济性和排气温度变化很小的情况下检测NO的浓度是否增加，减少NO的浓度是一个趋势，而且喷射起始角越小，燃料燃烧效果就越好。反之，尾气排放、燃油经济性和排气温度就会越差。
根据这种规律，我们绘制出了燃油喷射图（图3-1）。图中表示了发动机转速升高时，喷射角开始增加，混合气控制装置的工作时间也会增加。当负荷减少时，喷射角则相应减小。发动机转速下降到1400r—1800r/min时，这种图谱则适应重型柴油机的燃料喷射规律。
图3-1燃油喷射图
The first step in our work is to draw the load curve。We found that the jet pulse is linearly related to the supply angle。and the power can be freely controlled during the jet time。Based on this law。we drew the full load and maximum power curve in Figure 3-2.
Considering speed stability。we first let the XXX n of high-XXX correspondingly ced。and we can obtain the rated point of the maximum angle of 30CA。n delay is very helpful for high-speed diesel engines。including heavy-duty diesel engines。The XXX freely control the rated power curve。fuel speed adjustment。XXX controlled。In short。the engine control system can control within different speed ranges.
n:
The above research is based on the following three ns: