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A Control Oriented Model with Variable Valve Timing for HCCI Combustion Timing Control

机译：具有HCCI燃烧定时控制的可变气门正时的控制面向模型

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Homogeneous Charge Compression Ignition (HCCI) is a promising concept for combustion engines to reduce both emissions and fuel consumption. HCCI combustion control is a challenging issue because there is no direct initiator of combustion. Variable Valve Timing (VVT) is being used in SI engines to improve engine efficiency. When VVT is used in conjunction with HCCI combustion it is an effective way to control the start of combustion. VVT changes the amount of trapped residual gas and the effective compression ratio for each cycle both of which have a strong effect on combustion timing in HCCI engines. To control HCCI combustion, a physics based control oriented model is developed that includes the effect of trapped residual gas on combustion timing. The control oriented model is obtained by taking a physics based model of the reaction kinetics and transient dynamics and systematically reducing the model using simplification of reaction mechanisms. This method allows different fuels to be incorporated using a standard methodology. The reduced order model consists of these five stages: intake, compression, combustion, expansion and exhaust. This model fills the gap between complex models with highly detailed chemical kinetics and simple black box dynamic models that have been used in model based control.
机译：均匀电荷压缩点火（HCCI）是燃烧发动机的有希望的概念，以减少排放和燃料消耗。 HCCI燃烧控制是一个具有挑战性的问题，因为没有燃烧的直接发起者。可变气门定时（VVT）用于SI发动机，以提高发动机效率。当VVT与HCCI燃烧结合使用时，它是控制燃烧开始的有效方法。 VVT改变捕获的残余气体的量和每个循环的有效压缩比，这两个循环都对HCCI发动机的燃烧时机具有很强的影响。为了控制HCCI燃烧，开发了一种物理学的控制面向模型，其包括捕获的残余气体对燃烧正时的影响。通过采用基于物理学的反应动力学和瞬态动力学的物理学模型获得对控制的模型，并使用反应机制的简化系统地减少模型。该方法允许使用标准方法结合不同的燃料。减少的订单模型包括这五个阶段：进气，压缩，燃烧，膨胀和排气。该模型填充了复杂型号之间的差距，具有高度详细的化学动力学和基于模型的控制中使用的简单黑匣子动态模型。

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