Ignition coils for internal combustion engines
A technology for ignition coils and internal combustion engines, applied to coils, inductors, transformers/inductor components, etc., can solve problems such as high output voltage that have not been studied, and achieve high output voltage effects
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Embodiment approach 1
[0031] figure 1 It is a sectional view showing a schematic configuration of the ignition coil according to Embodiment 1 of the present invention. Such as figure 1 As shown, the above-mentioned ignition coil is provided with a primary coil having a primary winding 20 wound around a primary bobbin 10 . A secondary coil having a secondary winding 40 that supplies a high voltage to the spark plug as the primary current flowing through the primary winding 20 is energized and cut off is disposed on the outer periphery of the primary coil. The secondary winding 40 is divided and wound on the secondary bobbin 30 that is arranged coaxially with the primary coil and has a plurality of sections, and when excited, the number of turns increases from the winding start end to the winding end end. distribution of high voltage. The primary coil and the secondary coil are magnetically coupled by the iron core 50 . In addition, the above-mentioned structural components are accommodated in th...
Embodiment approach 2
[0090] Figure 9 The main part of the ignition coil of Embodiment 2 is shown. The ignition coil of Embodiment 2 differs from the ignition coil of Embodiment 1 in that the number of segments of the secondary coil in Embodiment 2 is six.
[0091] It can be seen that when the number of segments is six, the walls of the segments are reduced, and thus the ratio of the winding wire of the secondary coil is increased. In addition, by reducing the number of segments, the inter-segment capacitance can be reduced, and the withstand voltage can be ensured to the minimum necessary level. Therefore, by setting the number of segments of the secondary coil to six or less, the ignition coil can be Set to the smallest shape possible.
Embodiment approach 3
[0093] Figure 10 The main part of the ignition coil according to Embodiment 3 is shown. The ignition coil according to Embodiment 3 differs from the ignition coil according to Embodiment 1 in that the section where a large number of winding wires are wound has a large potential difference between sections. Therefore, in order to ensure the insulation distance, the wall of the section is thickened.
[0094] Here, when considering the secondary winding of a certain segment, first, at the winding start end side of the lowermost segment on the side of the primary coil, the winding is performed sequentially in the axial direction from the end face of the segment. For the end face on the opposite side, move to the second stage below the previous step, and this time, wind sequentially in the axial direction in the direction opposite to the winding direction of the lowest stage. That is, each stage is wound in a zigzag form from the lowest stage. In addition, there is a wall betwee...
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