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首页> 外文期刊>International journal of engine research >Triple-injection strategy for model-based control of premixed charge compression ignition diesel engine combustion
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Triple-injection strategy for model-based control of premixed charge compression ignition diesel engine combustion

机译：预混电荷压缩点火点火柴油机燃烧模型基于模型控制的三喷射策略

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Low-temperature combustion concepts are of great interest due to their potential to reduce nitrogen oxides (NO_(x)) and soot simultaneously. However, low-temperature combustion often leads to an increase in total unburnt hydrocarbons and carbon monoxide. Furthermore, combustion sound level becomes a challenge, especially at higher loads. Various studies show that these drawbacks can be compensated by advanced injection strategies, for example, split injections. In this study, a significantly modified triple-injection approach is proposed. First, the corresponding impact on engine performance is evaluated at stationary conditions, and second, its observed advantages are evaluated at transient operation. Stationary results show that NO_(x), soot, and combustion sound level are simultaneously reduced without losses in fuel efficiency and without any remarkable rise in total unburnt hydrocarbon as well as carbon monoxide emissions, satisfying Euro 6 emission regulations. Under transient conditions, model-based predictive control of the engine, which allows for reliable steady-state measurements and permits validation tests at transient operating points, is successfully demonstrated for single and triple injection. With both injection strategies, control of indicated mean effective pressure, combustion phasing (CA50 (crank angle (CA) when 50% fuel is consumed)), and NO_(x)emissions is achieved. As a result of this work, the identified optimal triple-injection strategy leads to lower total unburnt hydrocarbon emissions and to significantly reduced combustion sound level at the same level for NO_(x)emissions in comparison with the single-injection approach. Thus, the proposed triple-injection strategy combined with sophisticated model-based control is a promising concept for future engine emission control.
机译：由于它们同时减少氮氧化物（NO_（X））和烟灰，低温燃烧概念具有很大的兴趣。然而，低温燃烧通常导致总未燃烧的碳氢化合物和一氧化碳的增加。此外，燃烧声级变得挑战，特别是在较高的载荷上。各种研究表明，这些缺点可以通过先进的注射策略来补偿，例如分流注射。在该研究中，提出了一种显着改性的三进射方法。首先，在静止条件下评估对发动机性能的相应影响，并在瞬态操作时评估其观察到的优点。静止结果表明，NO_（X），烟灰和燃烧声级同时降低，而不会造成燃料效率的损失，并且没有任何显着的碳氢化合物以及一氧化碳排放，满足欧元的排放法规。在瞬态条件下，成功地证明了单一和三重注射的可靠性稳态测量和允许在瞬态操作点处进行可靠的稳态测量和验证测试的基于模型的预测控制。通过注射策略，控制指示的平均有效压力，燃烧相位（CA50（CA50），当消耗50％燃料时）和NO_（X）排放。由于这项工作，所识别的最佳三射流策略导致总未燃烧的烃排放量降低，并且与单喷射方法相比，NO_（x）排放的相同水平显着降低燃烧声水位。因此，所提出的三重喷射策略与复杂的基于模型的控制相结合，是未来发动机排放控制的有希望的概念。

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