Measurement and control of exhaust gas recirculation with an oxygen pumping device
Patent
·
OSTI ID:6727907
This patent describes an electrochemical device form measuring the percentage of exhaust gas recirculation (EGR) in an intake air and exhaust gas mixture of an internal combustion engine. It comprises: a first solid electrochemical pump cell having a first pair of opposed electrodes; a second solid electrochemical pump cell having a second pair of opposed electrodes; a supporting structure coupled to the first and second pump cells to form with them a restricted volume; an aperture for providing communication between the restricted volume and an ambient of the intake air and exhaust gas mixture; a first external circuit means; a second external circuit means; and a means coupled to the second pump cell for measuring the current flowing through the second pump cell.
- Assignee:
- Ford Motor Co., Dearborn, MI
- Patent Number(s):
- US 4909072; A
- Application Number:
- PPN: US 7-222864A
- OSTI ID:
- 6727907
- Country of Publication:
- United States
- Language:
- English
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