Ignition device for spark ignition engines

An ignition device for an Otto engine, comprising:

• an ignition coil;
• a printed circuit board carrying a control circuit comprising a power transistor;
• a plastic housing in which the ignition coil and the printed circuit board are arranged;
• a thermal dissipation element protruding through a wall of the plastic housing, the thermal dissipation element being adapted to be fastened on an engine block of a vehicle;
• and
• a cooling body carried by the printed circuit board;
• wherein one of the thermal dissipation element and cooling body is clamped to the other to form a thermal bridge, whereby heat generated by the control circuit is transferred outside of the plastic housing;
• further wherein, the thermal dissipation element comprises a bushing configured to mount the ignition device to the engine block.

An ignition device for an Otto engine, comprising:

• an ignition coil;
• a printed circuit board, which carries a control circuit comprising a power transistor;
• a plastic housing in which the ignition coil and the printed circuit board are arranged;
• and
• a thermal dissipation element, which protrudes through a wall of the plastic housing;
• wherein the printed circuit board carries a cooling body plugged together with the thermal dissipation element to form a thermal bridge, which dissipates thermal losses of the control circuit from the plastic housing;
• and
• wherein the thermal dissipation element comprises a bushing embedded in the plastic housing, the thermal dissipation element configured to receive a connector that connects the thermal dissipation element to the engine block.

An ignition device for an Otto engine, comprising:

• an ignition coil;
• a printed circuit board, which carries a control circuit comprising a power transistor;
• a plastic housing in which the ignition coil and the printed circuit board are arranged;
• and
• a thermal dissipation element, which protrudes through a wall of the plastic housing;
• wherein the printed circuit board carries a cooling body plugged together with the thermal dissipation element to form a thermal bridge, which dissipates thermal losses of the control circuit from the plastic housing;
• wherein the power transistor is coupled to a further cooling body;
• and
• wherein the thermal dissipation element is configured to be pushed onto a pin of the engine block and thereby cooled by coolant flowing through the engine block.