Dual spark plug ignition engine
Patent 4144860 Issued on March 20, 1979. Estimated Expiration Date: 
April 13, 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.
April 13, 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 1702108 1722145 2025203 3554092 3570460 3756205 3809042 3929115 Engine selectively utilizing hybrid thermodynamic combustion cycles Internal combustion engine with designated exhaust burning cylinders Patent #: 4068628 InventorsAssigneeApplicationNo. 05/787211 filed on 04/13/1977US Classes:123/310, COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS123/406.52, Throttle position responsive123/406.67, Vacuum timing control123/640Dual systemsExaminersPrimary: Myhre, Charles J.Assistant: Nelli, Raymond A. International ClassesF02P 15/00 (20060101)F02P 15/02 (20060101) Foreign Application Priority Data1976-04-16 JPAbstractThe air-fuel mixture in each combustion chamber of a dual spark plug ignition engine is ignited with two spark plugs during normal engine operation, but is ignited with only one of the two spark plugs during high power output engine operation. The spark timing in the ignition with one spark plug is advanced relative to that in the ignition with two spark plugs. | |
