Smart diagnostic method for active responsiveness of VGT executor

• Main Authors: LYU YING, CHEN TIE, REN LINGTONG
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2018
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention discloses a smart diagnostic method for active responsiveness of a VGT (Variable Geometry Turbocharger) executor. According to the invention, through diagnosis on an EGR (Exhaust Gas Recirculation) valve, working condition of an engine, an external environment and states of related executors are performed at first, other interference in a closed-loop space of the diagnosis function is eliminated and influence on judgment of the diagnosis is removed. An ECU sends excitation signals to the VGT executor. The VGT executor sends a feedback of related control values normally after receiving the signals. The ECU calculates the amplitude of received signals according to Fourier transform after receiving the related feedback signals. Comparison between the value obtained through calculation and an inherent threshold value is performed for fault confirmation and output. 本发明公开了种智能VGT执行器主动响应性诊断方法。本实施例的智能VGT执行器主动响应性诊断方法，首先通过对EGR阀，发动机工况，外部环境及相关执行器的状态的判断，排除诊断功能闭环空间内存在其它的干扰，影响诊断功能的判断，通过ECU发射激励信号给VGT执行器，VGT执行器在接