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Spark Plug Electrode Configuration Identification
Spark Plug Electrode Configuration Identification
Iridium Power
Example: IK16
With an Ultra-fine Iridium Alloy Center Electrode Employing a high melting point iridium alloy for the center electrode tip, a fine diameter of 0.4mm has been realized. This fine electrode has led to a lower spark voltage and a large increase in ignitability, which draws even more output and accelerator response from the engine. (Melting Point: Iridium: 2454º C, Platinum: 1769º C).
Iridium Long Life
Example: SK16R-P11, SK20R11, FK20HR11
Developing the world’s pioneering 0.7mm dia. Ultra-fine Iridium alloy, ignitability and lifetime are improved dramatically.
U-Groove
Example: W16EX-U
With a U-Groove ground electrode, large ignition energy can be obtained, easily igniting even lean mixtures.
Because it is fully projected (2.5mm insulator projection), carbon fouling is reduced, and smooth starting and acceleration performance are realized.
Iridium TT
Example: 1W16TT
Iridium TT Twin-Tip Technology was developed from the Original Equipment Specification Super Ignition Plug (SIP) design, fusing our patented 0.4mm diameter Iridium- Rhodium alloy Center Electrode with an OE style 0.7mm Platinum Tip Ground Electrode.
Combines the power and torque of a high performance plug with the endurance of a long life original equipment spark plug over 100,000 miles.
Platinum TT
Example: PW16TT
Platinum TT Twin-Tip Technology enables faster flame propagation for more complete combustion.
1.1mm PT Center Electrode with a Titanium-Enhanced Tip Ground Electrode.
Improved Fuel Economy, better acceleration and faster starts.
Double Platinum
Example: PK20R11
Platinum is used in both the center electrode and the ground electrode.
By making the center electrode (1.1mm dia) and by using a platinum tip, fuel consumption, drivability, and durability have been increased.
Extended Platinum
Example: PKJ20CR-L11
By extending the spark position into the combustion chamber, the combustion efficiency is increased and fuel consumption and drivability are improved.
Dual Electrode Platinum
Example: PK20TR11
The parts of the center electrode facing the ground electrodes have been platinum tipped.
The dual electrode construction results in a lower required voltage during the plus (+) discharge.
Single Platinum
Example: Q20PR-P11, K16PR-TP11
Only the center electrode is platinum tipped (1.1mm dia) which increases fuel consumption, drivability, and durability
K16PR-TP11 has had the ground electrode taper cut, further increasing ignitability.
Semi-Surface Gap for Rotary Engines
Example: J16AR-U11
Employing a semi-surface gap discharge, ignitability, fouling resistance, and durability have been increased.
Reduced voltage loss using a 7-rib design.
Extended
Example: KJ20CR11, KJ20CR-U11
Using a U-grooved ground electrode, a large ignition performance is obtained, allowing even lean mixtures to be ignited easily.
The spark position is extended into the ignition chamber, improving combustion efficiency, fuel consumption, and drivability.
Extended
Example: KJ20CR-L11
For Mazda and Mitsubishi Vehicles.
KJ20CR11 has no U-groove. KJ20CR-U11 has a U-groove.
Iridium Long Life SIP (Super Ignition Plug)
Example: FK20HR11, FXE20HR11
Revolutionary DENSO Needle-to-Needle OE Technology
Fine wire 0.55mm Iridium Alloy center electrode
0.7mm Platinum needle tipped ground electrode
For exceptional performance and durability
Semi-Surface Gap
Example: W20EKR-S11, W20EPR-S11
Using a semi-surface discharge, ignitability and fouling resistance are increased.
W20EKR-S11 are for Honda vehicles, while W20EPR-S11 are for Mitsubishi vehicles.
Semi-Surface Double Electrode
Example: W20ETR-S11
A double ground electrode with a 1mm gap is used and fouling resistance is improved.
Using a short opposed-type dual ground electrode, excellent durability is obtained.
Improved ignitability due to full projection.
Used for Toyota and Daihatsu.
Shrouded Semi-Surface Gap Double Electrode
Example: K20DTR-S11, W20DTR-S11
In addition to a semi-surface gap construction, the end of the threaded portion has been extended into the combustion chamber, and a shroud has been attached to improve fouling resistance.
Used for Daihatsu and Subaru.
Triple Electrode
Example: K22PB, W20EPB
Durability is increased with triple ground electrodes.
For Audi, VW, Citroen, Fiat, Mercedes-Benz, Renault.
Double Platinum for D.I.
Example: PK20R-P11
To prevent wear during plus (+) discharge, the size of the platinum has been increased on the ground electrode.
Shrouded Semi-Surface Gap Double Electrode
Example: K20DTR-S11, W20DTR-S11
In addition to a semi-surface gap construction, the end of the threaded portion has been extended into the combustion chamber, and a shroud has been attached to improve fouling resistance.
Used for Daihatsu and Subaru.
Triple Electrode
Example: K22PB, W20EPB
Durability is increased with triple ground electrodes.
For Audi, VW, Citroen, Fiat, Mercedes-Benz, Renault.
Double Platinum for D.I.
Example: PK20R-P11
To prevent wear during plus (+) discharge, the size of the platinum has been increased on the ground electrode.
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