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US 6,802,302 B1Granted
System for diagnosing EGR flow rate operation
AssigneeCummins Inc.
InventorsXiaoqiu Li, Mark R. Stepper, Stephanie L. Goerges, Yue Yun Wang
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AssigneeCummins Inc.
InventorsXiaoqiu Li, Mark R. Stepper, Stephanie L. Goerges, Yue Yun Wang
Estimating the term…
A system is disclosed for diagnosing EGR flow rate operation in an internal combustion engine includes an intake manifold and an exhaust manifold coupled to the engine and an EGR conduit for recirculating exhaust gas from the exhaust manifold to the intake manifold. Means are provided for determining an EGR fraction corresponding to a fractional amount of recirculated exhaust gas in a total air charge supplied to the intake manifold. A control computer is configured to continually accumulate at least one EGR fraction error sum as a function of the EGR fraction and a desired EGR fraction, and to diagnose EGR flow rate operation as a function of the accumulated value of the at least one EGR fraction error sum.
System for diagnosing exhaust gas recirculation (EGR) flow rate operation in an internal combustion engine, comprising:
A method for diagnosing exhaust gas recirculation (EGR) flow rate operation in an internal combustion engine having an intake manifold, an exhaust manifold and an EGR conduit for recirculating exhaust gas from the exhaust manifold to the intake manifold, the method comprising the steps of:
A method for diagnosing exhaust gas recirculation (EGR) flow rate operation in an internal combustion engine having an intake manifold, an exhaust manifold and an EGR conduit for recirculating exhaust gas from the exhaust manifold to the intake manifold, the method comprising the steps of:
Dependencies are inferred from the claim text.