Closed loop system equipped with a device for producing a reference signal in accordance with the output signal of a gas sensor for internal combustion engine
December 23, 1997. 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 References 3895611 Engine with dual sensor closed loop fuel control Closed loop fuel control using air injection in open loop modes Apparatus for supplying fuel to a combustion engine Air-fuel ratio control system for use with internal combustion engine Apparatus for controlling the air-fuel mixture ratio of internal combustion engine Air-fuel mixture control apparatus for internal combustion engines using digitally controlled valves Closed-loop mixture control system for an internal combustion engine with means for improving transitional response with improved characteristic to varying engine parameters Closed-loop mixture control system for an internal combustion engine using a differential amplifier with a reference voltage variable according to engine operating parameters 4089313 InventorsApplicationNo. 05/863603 filed on 12/23/1977US Classes:123/695, Variable reference value60/276Having means analyzing composition of exhaust gasExaminersPrimary: Myhre, Charles J.Assistant: Nelli, R. A. Attorney, Agent or FirmInternational ClassF02D 41/14 (20060101)Foreign Application Priority Data1976-12-28 JPAbstractA reference signal with which the output of a gas sensor is compared is produced by detecting the maximum and minimum values of the output of the gas sensor and adding via a voltage divider these values to each other. The variation of the reference signal may be limited with predicted maximum and minimum values of the output of the gas sensor. The reference signal produced in such a manner may be utilized for disabling and reactivating the feedback control. | |
