The stick coil’s cylindrical ignition coil generates a high voltage to the spark plug. Based on a signal from the engine ECU, a driving circuit (igniter) drives the ignition coil. Because the cylindrical ignition coil is designed to be stored in the engine plug hole, DENSO’s stick coil is easy to install in the engine.

DENSO Technology - Leading the World
In 1996, DENSO developed the world’s first stick coil that employed a cylindrical ignition coil.

Benefits and Features

• Small size, light weight, and smooth appearance on the top of the engine head cover
  • The cylindrical coil can be installed in the plug hole, which was previously a “dead space”.
  • A newly developed small-size driving circuit has been integrated into the top of the plug.
• Energy saving
  • Improving the coil’s magnetic efficiency reduces the time needed to generate high voltage for the ignition coil.

Basic Structure