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首页> 外文会议>Symposium on International Automotive Technology >A Scalable Simulation Method for the Assessment of Cycle-to-Cycle Combustion Variations and their impact on Fuel Consumption and Knock
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A Scalable Simulation Method for the Assessment of Cycle-to-Cycle Combustion Variations and their impact on Fuel Consumption and Knock

机译：一种可扩展的仿真方法，用于评估循环到循环燃烧变化及其对燃料消耗和敲击的影响

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In the present work, a scalable simulation methodology is presented that enables the assessment of the impact of SI-engine cycle-to-cycle combustion variations on fuel consumption and hence CO_2 emissions on three different levels of modeling depth: in-cylinder, steady-state engine and transient engine and vehicle simulation. On the detailed engine combustion chamber level, a 3D-CFD approach is used to study the impact of the turbulent in-cylinder flow on the cycle-resolved flame propagation characteristics. On engine level, cycle-to-cycle combustion variations are assessed regarding their impact on indicated mean effective pressure, aiming at estimating the possible fuel consumption savings when cyclic variations are minimized. Finally, on the vehicle system level, a combined real-time engine approach with crank-angle resolved cylinder is used to assess the potential fuel consumption savings for different vehicle drivecycle conditions. The results demonstrate the fuel consumption reduction potential when SI-engine cycle-to-cycle combustion variations are reduced to a minimum.
机译：在目前的工作中，提出了一种可扩展的仿真方法，使得能够评估Si-Engine循环到循环燃烧变化对燃料消耗的影响，因此在三种不同层次的建模深度上的燃料消耗和CO_2排放的影响：缸内，稳定 - 状态发动机和瞬态发动机和车辆仿真。在详细的发动机燃烧室水平上，3D-CFD方法用于研究湍流缸流量对循环分辨火焰传播特性的影响。在发动机水平上，对其对指示的平均有效压力的影响进行评估循环到循环燃烧变化，旨在估计可能的燃料消耗量，当循环变化最小化时。最后，在车辆系统水平上，使用曲柄角分辨气缸的组合实时发动机方法用于评估不同车辆驱动循环条件的潜在燃料消耗。结果表明，当SI发动机循环到循环燃烧变化降至最小时，燃料消耗降低电位。

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