Abstract:
A high energy inductive coil-per-plug ignition system operating at a higher voltage Vc than battery voltage Vb by use of boost-type power converter (1), using high energy density low inductance coils Ti which are further improved by partial encapsulation of the coils and by use of biasing magnets (120) in the large air gaps in the core to increase coil energy density, the coils connected to capacitive type spark plugs, with improved halo-disc type firing ends, by means of improved suppression wire (78), the system operated and controlled by a micro-controller (8) to generate and control the coil charge time Tch, the sequencing the spark firing, and other control features including finding the firing cylinder by simultaneous ignition firing and sensing during engine cranking, to provide a highly controlled and versatile ignition system capable of producing high energy flow-coupling ignition sparks with relatively fewer and smaller parts.
Abstract:
An improved ignition-combustion system for internal combustion engines with preferably a 2-valve engine 17/18 with dual-ignition 14a,14b with squish-flow channels 12a, 12b, and cylindrical high energy density pencil coils with open ends including biasing magnets 42a to 42d, the spark being 300 to 450 ma peak secondary current Is, and the primary current being 20 to 25 amps Ip of 60 to 100 turns Np, or bifiler turns of 120 to 200 turns of wire, with turns ratio Ns/Np of 50 to 70, and coil switches being 600 volt IGBTs, and power converter with energy storage capacitor storing many times the coil energy of 80 mJ to 160 mJ, of 20 to 60 volts power supply, the engine operating with a single ignition firing of 80 to 160 mJ, except when it is cold started or requires multi-firing for better performance, such as under lean burn or high EGR operation.
Abstract:
An ignition system for hydrocarbon fuels based on the principle of "flame discharge ignition" 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 flamme discharge ignition" system or an "enhanced conventional discharge ignition". Electrical, geometrical, spark, and hydrocarbon flame front plasma discharge properties are taken into account and adjusted or tailored 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.
Abstract:
A high energy inductive coil-per-plug ignition system operating at a higher voltage Vc than battery voltage Vb by use of boost-type power converter (1), using high energy density low inductance coils Ti which are further improved by partial encapsulation of the coils and by use of biasing magnets (120) in the large air gaps in the core to increase coil energy density, the coils connected to capacitive type spark plugs, with improved halo-disc type firing ends, by means of improved suppression wire (78), the system operated and controlled by a micro-controller (8) to generate and control the coil charge time Tch, the sequencing the spark firing, and other control features including finding the firing cylinder by simultaneous ignition firing and sensing during engine cranking, to provide a highly controlled and versatile ignition system capable of producing high energy flow-coupling ignition sparks with relatively fewer and smaller parts.
Abstract:
An Electromagnetic (EM) Ignition system suitable for adaptation to standard automobile engines including diesel engines, which has been improved by means of a high efficiency RF capacitive spark plug (94) with a projecting antenna tip (105) used for forming very large spark gaps (106) to the plug shell (103) and piston face (101) as well as for coupling high electric fields to the local initial flame plasma, preferably used in combination with shielded high voltage cable (133) including series inductive choke elements (108, 108a, 108b) and a Capacitive Discharge ignition system incorporating a low loss input capacitor (4), low loss SCR switch (5), a high efficiency ignition coil (3) with and optimized high current and high output voltage, and preferably a synchronous DC-DC power converter (13) providing "boost power" during ignition so that substantial capacitive, inductive, and electromagnetic energy is supplied to the combusting air-fuel mixture.
Abstract:
A capacitive discharge pulsed plasma ignition system using a novel ultra-high efficiency ignition coil (3) with an optimized high current and high voltage output. The ignition coil (3) is preferably used with a high pulse rate, high efficiency, multiple pulse ignition box providing rapid pulsed plasma ignition sites. The coil (3) has a low winding turns ratio of about 40, low primary and secondary inductances (1, 2) and resistances (11, 12), low loss in its core (3a), low secondary capacitance (5), and is used in conjunction with a capacitor (4) of capacitance between 1 and about 20 microfarads. The system uses voltage doubling at the spark gap (9) with a very high rate of rise of voltage and peak value of voltage through coil/capacitor design combination to fire a wide spark gap (9) and provide a very high current.
Abstract:
An improved ignition-engine system for internal combustion engines comprising a compact combustion chamber in the cylinder head and two main squish zones (101 a, 101 b) for producing high flow and turbulence, and at least one minor squish zone (105) at the end of the intake valve (104), the system using one or two independently operated spark plugs (102a, 102b), placed asymmetrically at or near the edge of the high flow squish zones to handle both ultra-lean light load conditions and high load conditions without misfire or knocking, the engine leanness and high load operation further improved by using variable compression ratio and/or direct fuel injection, including air-blast fuel injectors (181) and more centrally located air-blast-ignition fuel injector (193) more ideally suited for four valve engines and mild hybrid engines.
Abstract:
A high efficiency, high output, compact ignition coil particularly suited for use in capacitive discharge, multiple pulsing ignition systems, with about ten turns of primary (1) wire (Np) and about five hundred fifty turns of secondary (2) wire (Ns) for an input voltage Vp of approximately 350 volts and a peak output voltage Vs of 30 kV, the core and windings of the coil featuring separate and different primary (31) and secondary (41) core halves structured on the basis of herein developed coil open and closed circuit criteria such that the core half (31) containing the primary winding has a large center post (32) of cross-sectional area Ap with a narrow slot of width W1 around the post (32) for winding the primary wire (1) to provide essentially the total required coil leakage inductance Lpe of about 50 uH for an input capacitance of about 5 uF and spark discharge frequency fcc of about 10 kHz, and the secondary core (41) structured to have a center post (42) of cross-sectional area As about half that of Ap to provide a much larger winding width W2 than W1 to efficiently support the many layered larger coil secondary winding (2) for a same overall outer core diameter D of the coil comprising a pot core or ''E'' type core structure.
Abstract:
An improved ignition-engine system for internal combustion engines comprising a compact combustion chamber in the cylinder head and two main squish zones (101 a, 101 b) for producing high flow and turbulence, and at least one minor squish zone (105) at the end of the intake valve (104), the system using one or two independently operated spark plugs (102a, 102b), placed asymmetrically at or near the edge of the high flow squish zones to handle both ultra-lean light load conditions and high load conditions without misfire or knocking, the engine leanness and high load operation further improved by using variable compression ratio and/or direct fuel injection, including air-blast fuel injectors (181) and more centrally located air-blast-ignition fuel injector (193) more ideally suited for four valve engines and mild hybrid engines.
Abstract:
An improved ignition-combustion system for internal combustion engines comprising a compact combustion chamber zone (4) mainly in the engine cylinder head (6) mainly under the exhaust valve (8) and with large air-squish zones (124a, 124b) formed at the edge of the combustion zone which produce colliding squish flows (2, 2a, 3a, 3b) with high turbulence (3c) at the center of the combustion zone, with one or two spark plugs (12a/118, 12b/18a) located at the edge of the combustion zone within the high squish zones, resulting in a combined ignition and combustion system of colliding-flow-coupled-spark discharge (CFCSD), with the ignition employing high energy flow-resistant ignition sparks which move under the influence of the squish flow towards the central turbulence region as the piston nears engine top center, to produce rapid and complete burning of lean and high EGR mixtures for best engine efficiency and lowest emissions.