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Model-Based Control of HCCI Engine with Negative Valve Overlap Considering Engine Speed

机译：考虑发动机速度的负阀重叠的HCCI发动机模型控制

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摘要

This study intends to realize the model-based control of homogeneous charge compression ignition (HCCI) engines with the negative valve overlap method considering an effect of engine speed. First, a discrete model for the intake and exhaust processes of the HCCI engine is modified from the model of our previous study. The model’s inputs are the in-cylinder state values at the end of combustion, and the outputs are the in-cylinder state values at the intake valve closing (IVC) timing. The constructed model predicted the state values at IVC under different engine speed conditions, which are not used for calibration without significant accuracy deterioration from the previous model fitted at each engine speed. Next, the model-based feedforward controller using the proposed model was constructed. The controlled variables of the controller are the indicated mean effective pressure (IMEP) and the maximum pressure rise rate (MPRR) and the manipulated variables are the amount of fuel injection and valve profile. The performance of the constructed controller was evaluated by control simulation, which was conducted at different engine speeds. The result showed that IMEP followed the target values without misfiring, and the MPRR did not exceed the limit under all simulation conditions.
机译：本研究旨在实现具有考虑发动机速度效果的负阀重叠方法的均匀电荷压缩点火（HCCI）发动机的模型控制。首先，从我们以前的研究的模型修改HCCI引擎的进气和排气过程的离散模型。该模型的输入是燃烧结束时的缸内状态值，并且输出是进气阀关闭（IVC）定时的缸内状态值。构造模型在不同的发动机速度条件下预测IVC的状态值，其不用于校准，而没有从每个发动机速度安装的先前模型的显着精度劣化。接下来，构造了使用所提出的模型的基于模型的馈电控制器。控制器的受控变量是指示的平均有效压力（IMEP），最大压力升高速率（MPRR）和操纵变量是燃料喷射和阀轮廓的量。通过控制仿真评估构造控制器的性能，其以不同的发动机速度进行。结果表明，IMEP遵循目标值而不会发生错误，并且MPRR在所有仿真条件下没有超过限制。

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