提前

The optimized exhaust lag angle and intake advance angle of the EQ6100 engine are calculated by means of alternated one dimension searching method vary with engine operating conditions.

采用轮流一维搜索法，计算出随EQ6 10 0发动机工况变化的优化的排气门延迟关闭角和进气门提前开启角。

The output torque and power kept steady as the engine operated under brief rich cursions through control of spark advance angle and throttle opening.

当发动机短时间工作在富燃状态时，通过控制节气门开度和点火提前角，可以获得稳定的功率和扭矩输出。

In order to reduce the maximum combustion pressure and the NO, emission, it adopts smaller advance angle of fuel delivery. In most conditions, the combustion starts after TDC; the maximum rate of pressure rise, the combustion pressure and the heat release rate are lower; their relevant phases are retarded.

结果表明，为降低最大燃烧压力及NO、排放，小缸径直喷增压柴油机采用的喷油提前角较小，柴油机在大部分工况下，燃烧始点较迟，最大压力升高率、最大燃烧压力较低，其对应相位较迟，放热规律也较低。

According to the measured pressure data of the four-stroke small utility gasoline engine, the cyclical variations of the maximum pressure, the crank shaft angle at the maximum pressure, the mean indicated pressure and the largest pressure rise rate were analyzed. Meanwhile, the influences of ignition advance angle, load and rotation speed on cyclical variation were also investigated.

根据实测小型通用四冲程汽油机气缸压力，分析了最大爆发压力、最大爆发压力所对应曲轴转角、平均指示压力以及最大压力升高率等参数的循环波动特性，以及点火提前角、负荷和发动机转速对循环波动的影响。

The speed also affects combustion noise through variation of advance angle.

推迟供油提前角可以显著降低噪声。2、燃烧系统多参数分析2.1、喷孔数目在喷油压力不变时，减少喷油孔数量，可使促进燃油雾化，使着火延迟期缩短，因而有助于降低压力升高比，汽缸压力频谱线也相应降低，尤其是中、高频成分降的更多些。

So there need not only no failure but working in a stably good condition in the ignition system, the using condition and adjust of the use factors are the most important thing for the system performance. The paper analyses the characteristics of electronic ignition system, points out that determinant use factors are mainly the voltage of battery, the occupy-emptiness rate of the ignition signal, the clearance of spark plug, the resistance of high-voltage part, and the cam angle of spark advance.

本论文重点分析了电子点火系统故障特征，论证了决定电子点火系统性能的使用因素主要有电瓶电压、点火信号发生器发出电压信号的占空比、火花塞间隙、高压阻抗、点火提前角，这些因素在点火系使用过程中故障率占点火故障比例最大，故障出现的频率最高，而且有时常因维修调整不当导致点火系统性能变差。

By properly using turbocharger,increasing the efficiency of air charge, improving the machining process for the liner and reducing the advance angle of fuel feeding etc, the particles and NOx of improved 4102BZQ diesel engine were reduced so that it can meet EuroⅠemission standard.The develoPMent of Model 4102BZQ improved diesel engine allows the 4-cylinder engine of DCD to meet the emission legislation forced by our country, and extends the life-time of DCD engines, which makes a contribution to the develoPMent of DCD economy and protection of environment.

通过合理匹配增压器，缸盖进气道，提高充气效率、改善缸套加工工艺、缩小供油提前角等措施来降低4102BZQ完善提高型柴油机的颗粒物和氮氧化物，使之达到欧Ⅰ排放标准。4102BZQ完善提高型柴油机的开发，使朝柴四缸机达到了国家强制性排放法规的要求，延长了朝阳柴油机的寿命，为发展朝柴经济和保护环境做出了贡献。

N official of the AEK hospital on Tuesday is quoted by Italy's ANSA news agency as saying checks on the injured eye will only be able to be conducted "in a week to ten days, not before".

EK说了关于眼镜的检查只能在7到10天后进行，不能提前。

All this is not to antedate the demise of the empire .

这一切不会使帝国提前衰亡。

Recent Findings: A number of prospective studies have shown that weight gain can antedate the development of asthma.

近期发现：一些前瞻性研究显示超重能够提前哮喘的发生发展。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失