Internal-combustion engines – Charge forming device – Air/fuel ratio prior to combustion responsive means
Reexamination Certificate
2007-09-11
2007-09-11
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Air/fuel ratio prior to combustion responsive means
C123S568110, C123S568210, C701S108000, C701S109000, C073S118040
Reexamination Certificate
active
11116364
ABSTRACT:
A method and a device for controlling the exhaust gas recirculation in an internal-combustion engine are described herein. The engine is provided with an air-intake system, a gas-exhaust system, and an exhaust-gas-recirculation system. A linear oxygen sensor is arranged along the air-intake system in a section traversed, in use, by the air/recirculated-exhaust-gas mixture, for measuring the oxygen concentration in the mixture itself An electronic control unit is connected to the oxygen sensor and to the exhaust-gas-recirculation system for controlling the flow rate of recirculated exhaust gases on the basis of the oxygen concentration in the mixture taken in by the engine. In particular, the oxygen sensor is a UHEGO probe.
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Nishida Minoru et al., Journal of Engines, vol. 97, 1988, pp. 6168-6180.
Lanfranco Enrico
Ruggiero Andrea
Tonetti Marco
C.R.F. Societa Consortile per Azioni
Huynh Hai
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