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US 2017/0248089 A1Published application
Methods and systems for adjusting engine airflow based on output from an oxygen sensor
AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Michael Howard Shelby, James Alfred Hilditch, Jason Williams
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Abstract
Methods and systems are provided for adjusting a throttle based on an intake oxygen sensor output. In one example, a method may include adjusting a position of a throttle based on a dilution threshold and a total aircharge dilution level, the total dilution aircharge level based on an output of an intake oxygen sensor. Additionally, spark timing may be adjusted based on the total aircharge dilution level.
Claims6
1-15. (canceled)
An engine system, comprising:
- an intake manifold;
- a charge air cooler positioned in an intake passage upstream of the intake manifold;
- an intake throttle coupled to the intake manifold downstream of the charge air cooler;
- an exhaust gas recirculation (EGR) system including a passage for recirculating exhaust residuals from an exhaust passage to an intake passage via an EGR valve;
- an oxygen sensor coupled to the intake passage, downstream of the charge air cooler and upstream of the intake throttle;
- and
- a controller with computer readable instructions for adjusting a position of the intake throttle based on a total aircharge dilution relative to a dilution threshold, the total aircharge dilution based on an output of the oxygen sensor.
4 more elements
Dependencies are inferred from the claim text.