Reducing noxious components from the exhaust gases of internal combustion engines
Patent 3973529 Issued on August 10, 1976. Estimated Expiration Date: 
August 10, 1993. 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.
August 10, 1993. 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 3616274 3738341 3759232 3782347 3827237 3828749 3875907 InventorsAssigneeApplicationNo. 480582 filed on 06/18/1974US Classes:123/676, Exhaust gas temperature or pressure repsonsive123/683, Throttle position responsive123/695, Variable reference value60/276Having means analyzing composition of exhaust gasExaminersPrimary: Burns, Wendell E.Assistant: Reynolds, David D. Attorney, Agent or FirmForeign Application Priority Data1974-07-03 DTAbstractControl systems in which transition between oxidizing and reducing state of the exhaust gases is sensed, and the input to the engine modified in accordance with sensed exhaust gas composition utilize a sensor which has an output signal having a transition jump, the extent of the jump being highly temperature dependent; in accordance with the invention, a signal is derived representative of change in level of the transition jump, as a function of temperature, and the control circuit responsive to the transition jump, and controlling input to the engine is modified in accordance with the signal repesentative of level change of the transition jump, to compensate for temperature-dependent changes. | |
