公开(公告)号：US5704339A

公开(公告)日：1998-01-06

申请号：US638082

申请日：1996-04-26

申请人： Carole Marie Choe ,  Robert Matthew Marzonie ,  Michael John Cullen

发明人： Carole Marie Choe ,  Robert Matthew Marzonie ,  Michael John Cullen

IPC分类号： F02D45/00 ,  F01N3/08 ,  F02D41/02 ,  F02D41/14

CPC分类号： F01N3/0842 ,  F02D41/027 ,  F02D41/028 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2461 ,  F01N2570/04 ,  F02D2041/1411 ,  F02D2200/0818 ,  Y02T10/24

摘要： A managed fuel air control system is provided that transitions between a closed loop stoichiometric A/F mode and an open loop lean A/F mode of operation. When conditions permit open loop lean operation, the engine A/F is ramped from stoichiometric to the desired lean A/F. Periodically, while operating in the open loop lean mode, the system returns to the closed loop stoichiometric mode to update an open loop correction factor used during the open loop lean mode. The time at stoichiometric is usually limited to the time it takes to correct errors in calibration data that have occurred during open loop operation. During lean operation, the adaptive corrections learned at stoichiometric A/F are applied.

摘要翻译： 提供管理的燃料空气控制系统，其在闭环化学计量A / F模式和开环偏A / F操作模式之间转变。 当条件允许开环稀薄操作时，发动机A / F从化学计量倾斜到期望的稀薄A / F。 周期性地，当以开环稀薄模式操作时，系统返回到闭环化学计量模式以更新在开环稀薄模式期间使用的开环校正因子。 化学计量的时间通常限于纠正在开环操作期间发生的校准数据中的错误所花费的时间。 在精益运行期间，应用在化学计量A / F下学习的自适应校正。