摘要
针对因电子节气门位置传感器出现严重的信号偏移现象造成的车辆动力失控工况,通过监测目标进气量与实际进气量的偏差量进行识别,并在故障确认后通过对节气门驱动电机和系统燃油喷射进行主动干预及时避免危险驾驶状况的发生,同时提示驾驶员当前发动机处于危险工作状态。推导演算了驾驶动力需求、目标进气量、目标节气门开度转换过程,以及基于进气压力信号的发动机实际进气量,利用Spike算法对进气偏差量进行工程过滤处理。设计了驱动电机断电策略以及游车怠速功能。经过实车驾驶试验验证表明:提出的控制策略能够迅速有效地识别动力失控工况,采取合适的故障管理方式能有效避免危险驾驶状况的发生。
In terms of the condition of power out of control caused by serious electronic throttle position sensor error, a strategy that monitoring the deviation of desired air intake and actual air intake was proposed. Electronic throttle driving motor and fuel injection were intervened to avoid dangerous driving, and the driver was prompted that the engine is in dangerous working condition. Conversion process from driving power demand to desired air intake and desired throttle opening was derived, and actual air intake based on intake air pressure was calculated. Intake air deviation was processed using ＂Spike＂ algorithm. Driving motor power losing and hunting idle strategy was designed. Based on on-car driving tests results, power out of control condition can be identified quickly and effectively, and failure mode management was introduced timely, therefore dangerous driving condition was avoided effectively.
出处
《重庆理工大学学报（自然科学）》
2015年第12期32-40,共9页
Journal of Chongqing University of Technology：Natural Science
关键词
电子节气门
动力失控工况
故障诊断
Spike算法
故障管理
electronic throttle body
power out of control condition
fault diagnosis
Spike algorithm
failure mode management
