【摘要】 汽车发动机爆震检测是典型的一唯时变信号模式识别问题,详细描述了基于离散傅立叶变换(DFT)进行发动机各气缸爆震强度模式识别的算法,并采用递阶模式特征判别和判决阈值自调整策略,有关算法集成到我们自主开发的发动机控制系统中,并在国产奥托微型轿车上取得满意的实际应用效果。更多还原

【Abstract】 The automobile engine knock detection is a typical one-dimension time-varied signal pattern recognition problem.It is described about a Discrete Fourier Test(DFT)-based algorithm that detect engine’s various cylinder knock intensity through pattern recognition,and the hierarchical pattern signature discrimination and the adaptive strategy of discrimination threshold. The related algorithm has been integrated into the engine control system we developed independently,and has shown satisfying results in test of ALTO car.更多还原