The results show that the engine speed and brake mean effective pressure ( BMEP) have great influences on emissions. 结果表明:发动机转速和平均有效压力对污染物排放有较大影响;
Dissel mean effective pressure 狄塞尔平均有效压力
In the mean time, it will meet with ruthless and severe competition, effective and standard management as well as the business pressure and the labour pains in the reform. 同时还将面临着残酷激烈的竞争、高效规范的管理以及经营的压力、改革的阵痛。
The results showed that when EGR ratio was increased, an associated consequence of it was the reduction in the mean effective pressure, power output and thermal efficiency of the engine. 结果表明,柴油机采用EGR后,由于废气的引入,使柴油机的平均有效压力、输出功率和有效热效率随着EGR率的增加而降低。
A Study on Supercharged Diesel Engine with High Brake Mean Effective Pressure 高平均有效压力增压柴油机&一种泄压储能系统的研究
The results show that standard deviation and coefficient of variation of indicated mean effective pressure are the best parameters. 结果表明,平均指示压力的标准差及变动率是评定内燃机压力循环变动的最佳参数;
The results indicate that cycle to cycle variation increases with increasing octane rating for constant indicated mean effective pressure ( p_i), and at constant octane rating, cycle to cycle variation decreases with increasing p_i. 结果表明,在恒定的平均指示压力下循环变动随辛烷值的增大而增大,在恒定的辛烷值下循环变动随平均指示压力的增大而减小;
When average duration of early stage combustion increase under the conditions of lean mixture, the fluctuation of indicated mean effective pressure rapidly increases. 在稀薄混合气条件下,随着初期燃烧期间平均值的增加平均指示压力的变动急剧上升。
According to development status of high power high-speed marine diesel engines abroad in recent over 20 years. Strengthening index, mean effective pressure and other major technology parameters are discussed seriously and their development tendency is analyzed and proposed. 根据国外大功率高速船用柴油机20多年发展状况,以柴油机强化指标、平均有效压力等主要技术参数为主要对象,分析并提出大功率高速船用柴油机主要技术参数的发展趋势。
Whether single cylinder is misfired or not and the position of misfire cylinder can be clearly confirmed in the light of the estimated IMEP ( indicated mean effective pressure) and even the gas pressure inside the cylinder using transient speed fluctuation of crankshaft. 而利用瞬态曲轴转速波动估计出平均指示压力甚至估计出缸内燃气压力后,则可以明确地诊断出是否发生单缸熄火及熄火缸的位置。
The results show that, if the mixture becomes lean, the fluctuation of indicated mean effective pressure increases very fast; 试验结果表明,随着混合气变稀平均指示压力的变动迅速增大;
The coefficient of cyclic variation of the combustion peak pressure at medium load decreased by 28.3% compared with that at light load, and the coefficient of cyclic variation of the indicated mean effective pressure at medium load decreased by 47.6% compared with that at light load. 中等负荷与小负荷相比,最高燃烧压力循环变动率减少了28.3%,平均指示压力循环变动率减少了47.6%。
This paper presents a quasi linear dynamic model of diesel engine, including air mass flow rate, fuel/ air ratio, indicated thermal efficiency, friction loss, indicated mean effective pressure and engine dynamics etc. sub models. 本文建立了柴油机准线性动态模型,详细描述了空气流量率、燃空比、指示热效率、摩擦损失、平均指示压力输出、发动机动力学等子模型。
With the development of charging technology to high pressure ratio, in order to improve the matching characteristic of charger and diesel engine and raise diesel engine's mean effective pressure, much experimental investigation will be done. 随着增压技术向高增压比方向的发展,为了进一步完善柴油机与增压器的匹配性能和提高柴油机的平均有效压力,需要进行一系列增压系统试验研究。
The regulation of mechanical power loss, the ratio of mechanical power loss, mechanical efficiency, mean mechanical effective pressure, the ratio of mechanical loss varying with the rotation and the temperature of coolant were analyzed. 分析了发动机各零部件和整机的机械损失功率比、机械损失功率、机械效率和平均机械损失压力随发动机转速和润滑油温度变化的规律。
Small Diesel Engine torque harmonic amplitude and mean effective pressure was between 3 powers. 中小型柴油机简谐力矩幅值与平均有效压力也呈3次方关系。
The energy consumption of alcohol-gasoline blends is relative lower compared to gasoline fuel. At high loads, different alcohol-gasoline blends have slight effect on the cycle-by-cycle variations in indicated mean effective pressure. 在大负荷时,不同醇类混合燃料对发动机的循环波动影响较小。