Device for admission of secondary air to internal combustion engine intake
Patent 4194477 Issued on March 25, 1980. Estimated Expiration Date: 
March 27, 1998. 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.
March 27, 1998. 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 2681213 2722207 Apparatus for preventing after-fire in an internal combustion engine Programmed control system for a lean-burning internal combustion engine Patent #: 4106464 InventorAssigneeApplicationNo. 05/890678 filed on 03/27/1978US Classes:123/327, Auxiliary air fed to the engine123/587, Oxidant controlled by intake manifold vacuum137/480Valve in auxiliary inlet to induction lineExaminersPrimary: Burns, Wendell E.Attorney, Agent or FirmInternational ClassesF02M 23/08 (20060101)F02M 23/00 (20060101) Foreign Application Priority Data1977-04-14 JPAbstractA system for admitting secondary air to an engine intake manifold at the time of abrupt engine deceleration to avoid air/fuel mixtures which are momentarily too rich. The system is disabled from admitting secondary air when the engine is starting cold, and when its speed is slowly reduced. | |
