| 1. | The influence of air condition on air input and charging efficiency
进气状态对汽缸进气量与充气效率关系的影响 |
| 2. | Influence of blending gas fuels to air - charged efficiency and over - air coefficient in diesel engine
柴油机掺烧气体燃料对充气效率和过量空气系数的影响 |
| 3. | The utilization of the pressure wave in the intake pipe and exhaust pipe which not only make more exhaust gas out of the cylinder but also improve the charge efficiency and make more fresh gas
合理的利用进、排气管中的压力波，不仅能使更多的废气排出缸外，而且还可以提高发动机的充气效率，使尽可能多的新鲜工质充入。 |
| 4. | The results show that the heat transfer in intake manifold and cylinder has obvious effects on the volume efficiency , while the pipe friction coefficients and bent pressure loss coefficients have less effect
结果表明，进气管和气缸的传热对充气效率的影响较显著，而管道摩擦系数和弯管压力损失系数对充气效率的影响较小。 |
| 5. | When volume efficiency is computed by an engine cycle simulation considering gas flow in intake and exhaust manifold as one - dimensional unsteady flow , improperly given parameters in the simulation may cause an error over 5 %
摘要采用进排气管流动为一维非定常模型的发动机循环模拟方法计算充气效率时，若模型中给定的参数不合适，可能引起充气效率的计算误差超过5 % 。 |
| 6. | Abstract : through the study of inlet manifold of truck direct injection diesel engines , we studied the fundamental law of the utilization of gasdynamic effect in the inlet manifold to increase the volumetric efficiency in multi - cylinder engines
文摘:本文通过对车用直喷式柴油机进气管的试验研究，探讨了在多缸柴油机中利用进气管内的动力效应以提高充气效率的基本规律。 |
| 7. | In order to improve the prediction accuracy , the sensitivities of pipe friction coefficients , pressure loss coefficients in bents , wall temperatures and heat transfer coefficients in pipes and cylinders on the volume efficiency are investigated
为提高充气效率的计算精度，由模拟计算和相关试验，分析了管道的摩擦系数、弯管的压力损失系数、进气管壁和气缸壁温度及其传热系数对充气效率的影响程度。 |
| 8. | The best compression ratio and fuel injection advance angle are calculated through mess optimization calculation program of language c . on the basis , optimization simulation of inlet and exhaust timing has been carried with the diesel engine working model to increase diesel engine ' s volumetric efficient
在此基础上，利用柴油机工作过程模型，对进排气正时进行了优化计算，以提高柴油机的充气效率，改善燃烧性能，为进一步改善该机性能指明了方向。 |
| 9. | According to the feature of low atmospheric pressure and thin air in plateau area , on the basis of the relative coat increase , the specific property of small agricultural internal - combustion engine ' s combustibility are analysed , the aim is to increase pneumatic efficiency , improve combustibility
摘要结合高原地区大气压低，空气稀薄的特点，在成本相对不增加的基础上、对小型农用内燃机燃烧状况的特性进行分析，其目的在于提高充气效率，改善燃烧状况。 |
| 10. | Moreover , it has been pointed out that the hydrogen engine used in ? cylinder injection with high pressure can increase volumetric efficiency and compression ratio , - therefore , the performance indexes in this engine , such as output power , thermal efficiency , range of thickness of mixture with normal operation and nox emission , can be improved , and it is possible for the engine to realize rapid combustion of thin mixture , so abnormal combustion , such as backfire , pre ? ignition , can be controlled effectively
指出了采用内部混合气形成方式且高压喷射的氢发动机，有利于提高充气效率和压缩比，从而改善发动机的动力性和经济性；有利于扩展发动机正常工作的浓度范围；并且有利于实现稀薄混合气快速燃烧，从而可以有效地抑制早燃、回火及爆燃等异常燃烧和no _ x排放量。试验指出了发动机的点火正时、喷射正时及喷氢量对发动机的性能、异常燃烧、 no _ x排放量有很大影响。 |
