Method and system for controlling air/fuel level for internal combustion engine with two exhaust banks
摘要
A method and system for controlling the air/fuel ratio in an internal combustion engine (12) having first and second groups of cylinders coupled to first and second exhaust banks, respectively. The first exhaust bank includes a catalyst (20) and at least a pre-catalyst oxygen sensor (18). The second exhaust bank includes a catalyst (24) and no more than one post-catalyst oxygen sensor (26). The oxygen sensors monitor the oxygen content of the exhaust gases in their corresponding exhaust banks and provide feedback signals to a controller (202). The controller (202) uses the feedback signal from the pre-catalyst oxygen sensor (18) to calculate desired A/F values in the first group of cylinders. The controller uses both the feedback signal from the pre-catalyst oxygen sensor (18) and the feedback signal from the post-catalyst oxygen sensor (23) to calculate desired A/F values for the second group of cylinders. <IMAGE>
申请公布号
EP1118760(A3)
申请公布日期
2001.12.05
申请号
EP20010300360
申请日期
2001.01.16
申请人
FORD GLOBAL TECHNOLOGIES, INC.
发明人
SEALY, BRENT EDWARD;BEHR, KENNETH JOHN;BOOTH, RICHARD ANDREW;CULLEN, MICHAEL JOHN