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US 9,435,251 B2Granted
Method for estimating charge air cooler condensation storage and/or release with an intake oxygen sensor
AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Dan A. Makled, Richard E. Soltis
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 in charge air exiting the CAC may be based on an output of an oxygen sensor positioned downstream of the CAC. Further, engine actuators may be adjusted to increase combustion stability and/or reduce condensate formation based on the amount of water exiting the CAC.
Claims20
An engine method, comprising:
- determining an estimated amount of water in charge air exiting a charge air cooler based on an output of an oxygen sensor positioned downstream of the charge air cooler;
- and
- adjusting engine actuators based on the estimated amount of water.
An engine method, comprising:
- operating a first oxygen sensor positioned at an outlet of a charge air cooler in one or more of a base mode and a variable voltage mode responsive to an exhaust gas recirculation flow relative to a threshold;
- and
- adjusting engine actuators based on water storage parameters at the charge air cooler, the water storage parameters estimated based on an output of the first oxygen sensor.
An engine system, comprising:
- an intake manifold;
- a charge air cooler positioned upstream of the intake manifold;
- a first oxygen sensor positioned at an outlet of the charge air cooler;
- and
- a controller with computer readable instructions for adjusting engine actuators based on an amount of water in charge air exiting the charge air cooler, the amount of water estimated based on an output of the first oxygen sensor.
2 more elements
Dependencies are inferred from the claim text.