IGNITION SYSTEM [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]

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IGNITION SYSTEM

Outline

•  A direct ignition coil for independent ignition control has been adopted.

•  An ignition coil built-into the ion sensor has been adopted.

•  An iridium spark plug has been adopted.

Structural View

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Structure

•  Consists of the following parts:

Spark plug	(See SPARK PLUG.)
Ignition coil	(See IGNITION COIL.)

SPARK PLUG

Purpose, Function

•  The spark plug generates spark, ignition of the air-fuel mixture occurs, and combustion of the air-fuel mixture is triggered.

Construction

•  The spark plug is installed to the cylinder head.

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•  Iridium on the center electrode and platinum on the ground electrode are used (iridium spark plug).

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•  Because iridium has excellent durability, extreme thinning on the center electrode is achieved.

IGNITION COIL

Purpose, Function

•  The ignition coil generates high voltage by electromagnetic induction to discharge the spark plug.

Construction

•  The ignition coil is installed to the upper part of the spark plug (direct ignition coil).

•  With the adoption of the direct ignition coil, the ignition system parts have been simplified. As a result, voltage decrease is suppressed and ignition performance for the spark plug is stabilized.

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•  The ignition coil is built into the igniter and ion sensor. For the ion sensor, refer to CONTROL SYSTEM. (See ION SENSOR [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

Operation

•  Optimum ignition timing is performed according to the driving conditions by integrating the ignition control function into the PCM.

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