Delayed response disabling circuit for closed loop controlled internal combustion engines
September 6, 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 3903853 3916170 3919983 Exhaust gas sensor failure detection system Exhaust gas sensor operating temperature detection system Engine with dual sensor closed loop fuel control Control system for normalizing the air/fuel ratio in a fuel injection system System for reducing toxic components in the exhaust gas of an internal combustion engine Method and apparatus for controlling an internal combustion engine Fuel injection control system InventorsAssigneeApplicationNo. 05/831061 filed on 09/06/1977US Classes:123/325, Deceleration responsive cutoff of fuel to engine (e.g., pollution control)60/276, Having means analyzing composition of exhaust gas60/285Engine fuel, air, or ignition controlled by sensor of reactor conditionExaminersPrimary: Myhre, Charles J.Assistant: Lall, P. S. Attorney, Agent or FirmInternational ClassF02D 41/14 (20060101)Foreign Application Priority Data1976-09-06 JPAbstractA disabling circuit for a closed loop fuel controlled internal combustion engines of the type wherein fuel is completely cut off during deceleration includes a circuit for generating an electrical signal of a duration corresponding to the duration of fueld cut-off. A timing circuit respectively insensitive and sensitive to electrical signals of short and long durations derives a disabling signal which clamps the feedback signal to a suitable control voltage until the end of the electrical signal. The timing circuit is responsive to the end of the electrical signal to introduce a delay time to prolong the disabling signal and prevent the lean mixture fuel cut-off periods from adversely affecting control system when it resumes closed loop operation. | |
