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    • 56. 发明专利
    • DE69626863D1
    • 2003-04-24
    • DE69626863
    • 1996-12-12
    • WARD MICHAEL A V
    • WARD MICHAEL A V
    • F02P3/00F02P3/04F02P7/03F02P9/00H01F38/12
    • PCT No. PCT/US96/19898 Sec. 371 Date Apr. 21, 1999 Sec. 102(e) Date Apr. 21, 1999 PCT Filed Dec. 12, 1996 PCT Pub. No. WO97/21920 PCT Pub. Date Jun. 19, 1997A high power, high energy inductive ignition system with a parallel array of multiple ignition coils Ti (2a, 2b) and associated 600 volt unclamped IGBT power switches Si (8a, 8b), for use with an automotive 12 volt storage battery (1), the system having an internal voltage source (12) to generate a voltage Vc approximately three times the peal primary coil current with coils Ti of low primary inductance of about 0,5 millihenry and of open E-type core structure for spark energy in the range of 120 to 250 mj, the system using a lossless snubber and variable control inductor (6) to provide very high circuit and component efficiency and high coil energy density, in mj/gm, three times that of conventional inductive ignition systems, and high output voltage of 40 kilovolts with fast rise time of 10 microseconds.
    • 58. 发明专利
    • FORMATION OF ELECTRIC FIELD DISCHARGES
    • CA1311795C
    • 1992-12-22
    • CA554843
    • 1987-12-18
    • WARD MICHAEL A V
    • WARD MICHAEL A V
    • F02P23/04F02B1/04F02P3/08F02P9/00H01T13/50F02P3/06H01T13/20H01T15/00
    • An ignition system for hydrocarbon fuels based on a new approach to ignition in which the principle of "flame discharge ignition" is introduced to couple ignition energy to the initial flame front plasma (32) to convert the flame front (31) into an ignition discharge in which electrical energy is efficiently coupled to the propagating flame front, either as a "pulsing flame discharge ignition" system in which the flame front becomes part of the spark discharge circuit, or an "enhanced conventional discharge ignition" in which very high electric fields are "naturally" maintained at the flame front. Electrical, geometrical, spark, and hydrocarbon flame front plasma discharge properties are taken into account and adjusted or tailored, where practical, within the context of the new approach, to create a flame discharge process capable of igniting very lean mixtures. The system is further improved by modifying the fuel's flame front plasma properties by increasing the ratio of the Carbon to Hydrogen (C/H) content of the fuel so that the C/H ratio falls in the range of 0.5 to 2,0, and/or by using additives to further increase the flame front plasma density (35) without reducing the plasma recombination coefficient, and preferably raising it by at least eliminating lead additives. Such improved hydrocarbon fuel is usable in all types of IC engines and burners including systems using electromagnetic combustion support means for maintaining a high electric field of the order of 1000 volts/cm/atmosphere at the fuel-air flame front for enhancing combustion reactions, especially under lean air-fuel ratio for the lowest exhaust emissions (low NOx) and highest combustion and engine efficiency.