Engine air/fuel control with adaptive correction of ego sensor output
January 10, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesReducing noxious components from the exhaust gases of internal combustion engines Compensation for inherent fluctuation in output level of exhaust sensor in air-fuel ratio control system for internal combustion engine Air-fuel ratio control system Steady state mode oxygen sensor and method Transient mode oxygen sensor and method Oscillatory mode oxygen sensor and method Dual EGO sensor closed loop fuel control 5117631 Catalytic converter efficiency monitoring Catalytic converter monitoring using downstream oxygen sensor InventorsAssigneeApplicationNo. 179271 filed on 01/10/1994US Classes:60/274, Anti-pollution60/276, Having means analyzing composition of exhaust gas60/285, Engine fuel, air, or ignition controlled by sensor of reactor condition123/703Exhaust gas composition sensorExaminersPrimary: Lazarus, Ira S.Assistant: O'Connor, Daniel J. Attorney, Agent or FirmInternational ClassF01N 003/20AbstractEngine air/fuel ratio is controlled in response to a comparison of an exhaust gas oxygen sensor output with a reference value. A correction voltage is generated which is related to a change in the midpoint between saturated output states of the sensor during a test period in which engine air/fuel operation is first forced rich and then forced lean of a preselected air/fuel ratio. The sensor output amplitude is shifted with the correction voltage to reduce variations between the reference value and the midpoint.Other References
Field of SearchAnti-pollutionHaving means analyzing composition of exhaust gas Having sensor or indicator of malfunction, unsafeness, or disarray of treater (e.g., fusible link, etc.) Engine fuel, air, or ignition controlled by sensor of reactor condition With modifying or updating memory (i.e., learning) Exhaust gas composition sensor | |
