id0118u0108200

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

am3zzn00007322

Structure

• Consists of the following parts:

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.

am3zzn00008214

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

am6zzn00002442

• 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.

am3zzn00008215

• 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 (US))].)

Operation

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

amxuun00002233