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低速低负荷
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  low speed and load
     Experimental Study on Effect of Inclined Swirl on Combustion Process of a Gasoline Engine at Low Speed and Load
     斜轴涡流对汽油机低速低负荷燃烧过程影响的试验研究
短句来源
     The results show that the engine has better performance by using swirl flow exhaust system than by using MPC system under the most running condition, but has worse performance at the low speed and load condition.
     实验结果表明:在大部分运行工况下,螺旋流排气系统对N8160ZC柴油机的整机性能有一定程度的改善,但在低速低负荷工况下较 MPC排气系统稍差。
短句来源
     Variable inclined swirl system of a four-valve gasoline engine was developed. The effect of inclined swirl on combustion process of a four-valve engine at low speed and load were analyzed with the CB-466 combustion analyzer on engine test-bed.
     研制了一套四气门汽油机可变斜轴涡流系统,在发动机试验台上利用CB-466燃烧分析仪研究了斜轴涡流特性对低速低负荷燃烧过程的影响。
短句来源
  “低速低负荷”译为未确定词的双语例句
     Experimental study on combustion process in four-valve gasoline engine at low speed and light load
     四气门汽油机低速低负荷燃烧过程的试验研究
短句来源
     under the preconditions of power performance, emission performance, fuel consumption and work stabilization of engine, the optimum range of ignition energy is from 41mJ to 84 mJ under the low speed and low load, and is from 110 mJ to 160 mJ under the high speed and high load;
     发动机稳定工作的点火能量在综合经济性、动力性和排放性的前提下,低速低负荷下较佳的点火能量范围在41~84mJ,在高速高负荷下较佳的点火能量范围为110~160mJ;
短句来源
     The two processes injection which brings on quasi homogenous combustion is quite available to optimize the function of lean burn mixture combustion.
     在低速低负荷工况下,二次喷油准均质燃烧技术可以优化稀燃效果,更好地改善HC排放和燃油消耗;
短句来源
     To achieve HCCI (Homogeneous Charge Compression Ignition) combustion in the range of low speeds and loads, the specially designed camshafts with low cam lift and short intake/exhaust cam duration were mounted in a Ricardo Hydra four-stroke single cylinder port-injection gasoline engine.
     为了在发动机的低速低负荷区实现均质充量压缩着火(HCCI)燃烧,设计了气门升程小和气门开启持续期短的进、排气门凸轮轴,并将其安装在Ricardo Hydra单缸汽油机上。
短句来源
     HCCI combustion characteristics were investigated on the modified engine. The results show that HCCI combustion was achieved by controlling the amount of trapped residuals through negative valve overlap.
     试验研究了发动机使用理论空燃比混合气时的燃烧情况,结果表明,使用负气门重叠角可以在低速低负荷区实现HCCI燃烧。
短句来源
更多       
  相似匹配句对
     Experimental study on combustion process in four-valve gasoline engine at low speed and light load
     四气门汽油机负荷燃烧过程的试验研究
短句来源
     A SOLUTION OF THE LOW-SPEED AND FLAT TRAJECTORY
     伸弹道解法
短句来源
     Experimental Study on Effect of Inclined Swirl on Combustion Process of a Gasoline Engine at Low Speed and Load
     斜轴涡流对汽油机负荷燃烧过程影响的试验研究
短句来源
     DISCUSSIONS ON UREA PLANT OPERATION AT LOW LOAD
     尿素装置负荷运行的探讨
短句来源
     Design of Low Environment Load Cement Clinker System
     环境负荷水泥熟料体系设计
短句来源
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  low speed and load
At low speed and load, the dual-fuel operation presented an improved modified diagrams comparable to diesel fuel operation as shown in Figure 6.
      
The advantages include high energy available at the turbine, good performance at low speed and load, and good turbo-charger acceleration.
      
The disadvantages include low available energy at the turbine, poor performance at low speed and load, and poor turbocharger acceleration.
      


After more than ten years of design and development, the author has made a new type of pumps and motors of high efficiency. Motor vehicles equipped with these new type of pumps and motors, its power transmission efficiency can attain 80-85% in most eases; only in low speed and low load, it will drop to 70-80%. As it can change the speed ratio steplessly in wide range, so that engine can operate in optimal conditions; the author reasoned that it can save some fuel besides lowering the curb weight and cost of...

After more than ten years of design and development, the author has made a new type of pumps and motors of high efficiency. Motor vehicles equipped with these new type of pumps and motors, its power transmission efficiency can attain 80-85% in most eases; only in low speed and low load, it will drop to 70-80%. As it can change the speed ratio steplessly in wide range, so that engine can operate in optimal conditions; the author reasoned that it can save some fuel besides lowering the curb weight and cost of the motor vehicles. Extensive bench tests were carried out to verify the performance and wear characteristics of these new pumps and motors.

作者用了十余年的时间,发展了新型高效的液压泵和马达。计算分析和试验的结果,用新型的泵和马达,整车的传动效率在大多数工况可达80~85%,只在低速、低负荷下,效率降到70~80%。由于无级变速发动机可以在较佳工况下运转,使用这个传动系统将可以降低燃油消耗。并已由装在某一轻型货车所证实。

The paper describes a special equipment for vacuum friction test, and presents f-v test curves for combinations of PTFE-granite, PTFE-chromium plating steel and PTFE-steel ball in a vacuum of 10-3 Torr. It, in addition, gives the kinetic and static coefficients of friction of the combination of PTFE and granite under various contact stress, and also gives a comparison of f-v curves in atmosphere with that in a vacuum.The results indicate that, of three combinations, the PTFE-granite couple has the smallest difference,...

The paper describes a special equipment for vacuum friction test, and presents f-v test curves for combinations of PTFE-granite, PTFE-chromium plating steel and PTFE-steel ball in a vacuum of 10-3 Torr. It, in addition, gives the kinetic and static coefficients of friction of the combination of PTFE and granite under various contact stress, and also gives a comparison of f-v curves in atmosphere with that in a vacuum.The results indicate that, of three combinations, the PTFE-granite couple has the smallest difference, only 0.02, between the kinetic and the static coefficient. The combination of PTFE and chromium plating steel, on the other hand, provides a lowest kinetic coefficient, 0.067, but the largest difference between the kinetic and static coefficient. Thus, it is possible to use PTFE-granite as the sideway face material at low speed and load in a vacuum to reduce stick-slip.

本文描述了一台专用的真空摩擦试验装置,并给出了真空度为10~(-3)托下,PTFE-花岗石、PTFE—镀铬铜和PTFE—钢球三种摩擦副材料的f-v实验曲线;给出了接触压力为不同数值时PTFE—花岗石的动、静摩擦系数,并比较了它们在大气和真空下的f—v曲线。试验结果表明,PTFE—花岗石的动、静摩擦系数之差是三种摩擦副中最低的,仅为0.02。而PTFE—镀铬铜的动摩擦系数最低(0.067),但其动、静摩擦系数之差最大。故选用PTF正-花岗石作为真空中低速、低负荷工作台导轨面材料有可能收到减小低速爬行的效果。

An investigation of the improved emission characteristics was made on asingle-cylinder test gasoline engine with two kinds of cylinder heads byadding hydrogen.Experimental results show that CO,HC,NO,emissionconcentrations can be reduced.With the hydrogen being added,the lean mix-ture limits with low toxic emission corresponding to the lean economicrange of fuel consumption are extended,so the economy can be improvedsimultaneously.For example,at the point of low fuel consumption CO con-centration of the engine...

An investigation of the improved emission characteristics was made on asingle-cylinder test gasoline engine with two kinds of cylinder heads byadding hydrogen.Experimental results show that CO,HC,NO,emissionconcentrations can be reduced.With the hydrogen being added,the lean mix-ture limits with low toxic emission corresponding to the lean economicrange of fuel consumption are extended,so the economy can be improvedsimultaneously.For example,at the point of low fuel consumption CO con-centration of the engine fueled by gasoline-hydrogen mixed fuel (at addedhydrogen mass fraction X_h=3%) is reduced evidently (CO concentration is220 ppm) ,compared with that of the engine fueled by gasoline.A bettereffect can be achieved at low engine speed and load. The experimental results also show that the cylinder heads with differentcombustion chambers having different performances are all effective on reducing toxic emission concentration by adding hydrogen.The theoreticalanalysis was also made on addition of hydrogen to improve the emissioncharacteristics,thereby a basis for its application is provided.

作者用两种气缸盖在单缸汽油试验机上进行了加氢试验研究。试验结果表明,加氢能够降低CO、HC、NO_x排放物浓度,并扩大低有害排放物的稀薄混合气区域,该区域相当于稀的经济油耗区,因而同时提高了经济性。例如,在最低油耗点,与燃用汽油的发动机相比较,燃用氢-汽油混合燃料(加氢重量比率X_h=3%)时,CO浓度明显降低(CO浓度为220ppm)。低速、低负荷时效果较好。试验结果还表明,具有不同性能燃烧室的气缸盖,加氢后对降低有害排放物浓度均有效果。本文还进行了加氢改善排放特性的理论分析,从而为实际应用提供依据。

 
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