Electronic ignition system for internal combustion engines and method for controlling the system
February 18, 2017. 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 ReferencesIgnition system for internal combustion engine Ignition system for an internal combustion engine Variable-energy-spark ignition system for internal combustion engines, particularly for motor vehicles Ionic current sensing apparatus for engine spark plug with negative ignition voltage and positive DC voltage application Ignition system Ignition system for internal combustion engines Method and apparatus for detecting ionic current in the ignition system of an internal combustion engine Method for monitoring operations of an internal combustion engine to detect combustion misses Ignition control circuit, and engine system Patent #: 5623912 InventorsAssigneeApplicationNo. 802889 filed on 02/18/1997US Classes:123/644Current or voltage sensing in coil primaryExaminersPrimary: Nelli, Raymond A.Attorney, Agent or FirmForeign Patent References
International ClassF02P 003/12Foreign Application Priority Data1996-02-16 DEAbstractAn electronic ignition system for an internal combustion engine is so controlled that an ignition current or secondary current caused by an ignition spark at the respective spark plug in the secondary coil of an ignition transformer is evaluated for initiating, if necessary, follow-up charges of the primary coil to thereby generate further ignition impulses. The initial loading or charging impulse is provided by a respective control circuit. The total sparking time at the respective spark plug thus corresponds to a sequence of individual impulses, each of which causes an ignition spark. The detection of the ignition current in the secondary coils is performed with an ignition current measuring circuit arrangement connected to the secondary coils. This measuring circuit (SC) generates a signal representing the secondary or ignition current represented as a voltage drop across a measuring resistor (R2). The voltage drop signal is supplied to an evaluating circuit which in turn generates a follow-up loading signal in response to the result of the evaluation of the measured voltage drop signal. | |
