公开(公告)号：US11225927B2

公开(公告)日：2022-01-18

申请号：US17198256

申请日：2021-03-11

申请人： TONGJI UNIVERSITY

发明人： Diming Lou ,  Liang Fang ,  Piqiang Tan ,  Yunhua Zhang ,  Zhiyuan Hu ,  Yafeng Shi

IPC分类号： F02D41/30 ,  F02D41/24

摘要： An air-fuel ratio control system for a hybrid vehicle engine is provided, including a torque coordination calculation module, which converts a target effective torque of a hybrid power control unit into a target indicated torque; a torque estimation module, which obtains an estimated indicated torque according to an operating state of an engine; an air-fuel ratio feedback control module, which generates a feedback correction factor based on deviation between the estimated indicated torque and the target indicated torque; and an air-fuel ratio feedforward control module, which converts the target indicated torque into an air-fuel ratio feedforward control signal according to a calibration parameter and engine speed. A target air-fuel ratio is obtained by correcting the air-fuel ratio feedforward control signal, via the feedback correction factor; and the target air-fuel ratio is configured to act on the engine to achieve air-fuel ratio control.