Testing method for ignition systems of internal combustion engines in motor vehicles
Patent 4684896 Issued on August 4, 1987. Estimated Expiration Date: 
November 16, 2004. 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.
November 16, 2004. 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 2430069 Ignition arc monitor circuit Ignition system tester Patent #: 4449100 InventorApplicationNo. 06/671914 filed on 11/16/1984US Classes:324/399, Wherein a measured electric quantity indicates spark plug condition324/380Electronic ignition systemExaminersPrimary: Krawczewicz, Stanley T.Attorney, Agent or FirmInternational ClassF02P 17/12 (20060101)Foreign Application Priority Data1983-11-19 DEAbstractA method and apparatus for testing ignition systems of internal combustion engines in motor vehicles, in which an ignition voltage signal on the primary side for one ignition operation or averaged for several ignition operations is compared with a should-be signal and the electrode distance of a spark plug is determined in that the should-be signal is taken at the beginning of a service interval and under an operating condition which at least approximately equals the actual operating condition at the point of time of the test. | |
