Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2008-06-13
2009-10-06
Solis, Erick (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S703000, C701S103000, C701S109000
Reexamination Certificate
active
07597091
ABSTRACT:
When an internal combustion engine including a plurality of cylinders is operating steadily, an index value relating to an actual hydrogen content in exhaust gas downstream of a portion where exhaust passages from the cylinders merge, and upstream of a catalyst is detected. When an index value relating to the actual hydrogen content in the exhaust gas is larger than a determination index value relating to a hydrogen content corresponding to a permissible limit of air-fuel ratio variation, it is determined that there is abnormal air-fuel ratio variation between the cylinders.
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Aoki Keiichiro
Iwazaki Yasushi
Kidokoro Toru
Nakamura Fumihiko
Sawada Hiroshi
Oliff & Berridg,e PLC
Solis Erick
Toyota Jidosha & Kabushiki Kaisha
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