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US 9,051,890 B2Granted
Method for estimating charge air cooler condensation storage with an intake oxygen sensor
AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Daniel Joseph Styles, James Alfred Hilditch, Mehdi Abarham
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for estimating water storage in a charge air cooler (CAC). In one example, an amount of water accumulating in the CAC may be based on an output of an oxygen sensor positioned downstream of the CAC and ambient humidity. Further, engine actuators may be adjusted to purge condensate from the CAC and/or reduce condensate formation based on the amount of water inside the CAC.
Claims20
An engine method, comprising:
- using engine actuators to adjust engine operation based on water storage at a charge air cooler, the water storage determined based on an output of an oxygen sensor positioned downstream of the charge air cooler and ambient humidity.
An engine method, comprising:
- using engine actuators to adjust engine operation based on a water storage rate at a charge air cooler, the water storage rate determined based on an output of an oxygen sensor positioned at an outlet of the charge air cooler and ambient humidity.
An engine system, comprising:
- an intake manifold;
- a charge air cooler positioned upstream of the intake manifold;
- an oxygen sensor positioned at an outlet of the charge air cooler;
- and
- a controller with computer readable instructions for adjusting engine operation responsive to water storage at the charge air cooler, the water storage determined based on an output of the oxygen sensor and ambient humidity when exhaust gas recirculation is not flowing.
2 more elements
Dependencies are inferred from the claim text.